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TA8725AN
1CHIP COR NTSC CTV
TOSHIBA TA8725AN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8725AN
1CHIP COR NTSC CTV
The TA8725AN combines all the functions required for an
NTSC CTV system in a 56-lead, dual-in-line shrink-type
plastic package.
This IC includes PLL type PIF/SIF circuits, video/chroma/ _-----",
deflection circuits and OSD interfaces. _------"""
@Wfifiiimiiii
FEATURES
PIF stage
9 Split carrier PLL type PIF
SDIP56-P-600-1.78
0 High speed 3-stage variable gain PIF amplifier with Weight : 5.55g (Typ.)
dual time constants (Peak AGC)
0 Single-end AFT output with defeat function
It RF AGC output (Reverse AGC)
o Sync. negative detected video output
It Internal black/white noise inverter with EIA decoder SW (for |S-15)
SIF stage
0 Split carrier SIF
o 20dB SIF AGC
o Quadrature FM detector circuit with sound mute function
Video stage
It Black expander
Variable DC restoration ratio
Built-in video delay-Iine with 3.58MH2 trap
Picture sharpness with internal delay-line (160ns)
Contrast control with uni-color function
Brightness control
1 2001-06-25
TOSHIBA
TA8725AN
Chroma stage
Built-in take off or 3.58MH2 Band-pass filters can be selected.
Built-in ACC and killer filters
Color control
Tint control
Color differential outputs
Filter automatic tuning
Detection stage
Adjustment-free horizontal and vertical count down system
Built-in vertical integral and V. sepa. circuit
Vertical drive pulse output for TA8445K
X-ray protect circuit
OSD interface stage
R, G and B OSD input
Fast-blanking SW input
OSC brightness control
TOSHIBA TA8725AN
BLOCK DIAGRAM
OSD FBP H. v,
Contrast Bri htness
PIF Control Cogtrol In ut O ut O X-RAY
Sharpness fl
+ Brightness
I Chroma Video Control
+ Input Input
Output (NP)
Clamp 55:39 . Output
Black Det.
Invertor DC
Restoration
Limiter
YDeIay rature Cont- Clamp/
Control rast Bri ht
APC Killer
Matrix
OSD Interface
P/S GND
19 0 1
R B GBlankin
OSD Input R-Y B-Y G-Y -Y
IF AGC
Filter pw
Filter
Tint Control
Control
Filter
3 2001-06-25
TOSHIBA
TA8725AN
TERMINAL FUNCTION
PIN NAME
FUNCTION
INTERFACE CIRCUIT
SIF AGC
This is a SIF AGC filter terminal.
AGC is applied in the SIF input stage.
This AGC is referenced to the limiter
input signal.
i§o~ ost, 03
1st AGC
This is a PIF 1st AGC filter terminal.
Peak AGC is applied in the PIF 3-stage
amp. This AGC is referenced to the
PIF-detection output signal after the
video amp.
A high-speed AGC circuit based on
dual time constants is used here.
By connecting this pin to GND,
requirements under the U.S. |S-15
standards can be met.
IF Amp.
Minimum
PIF Input 1
PIF Input 2
This is a PIF differential amp. input
A 3-stage, dual-time constant, high-
speed AGC amp. is incorporated here.
The standard PIF input level is 84dBpV.
H|— 1.5m
P/S GND
This is a GND pin for the PIF and SIF
circuits.
SIF Input
This is a SIF amp. input pin.
An AGC amp. with a gain variable
range of approx. 20dB is incorporated
The standard SIF input signal level is
75dB/A/.
The AGC response range is -10dB.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
PLL Sync. Det.
This is a PLL sync. Det. filter terminal.
The PLL synchronization is detected by
identifying whether or not signal is
present after meanvalue-demodulating
the PIF-Det. output signal.
The result of sync. Det. is output from
the SIF output pin as a DC voltage.
When locked in phase : HIGH level
When not locked in phase : LOW level
0.15mA
SIF Output
This is a SlF-Det. output pin.
Make sure that the output from this
pin is fed to the limiter input terminal
through a 4.5MHz band-pass filter.
This pin also functions as a PLL sync.
Det. output pin. Check the DC voltage
from this pin to see the locked
condition of the PLL circuit. The DC
voltage is as follows :
When locked in phase : HIGH level
When not locked in phase : LOW level
Limiter Input
This is a limiter amp. input pin. Use
this pin to input an audio FM
modulation signal.
AGC control is applied using the SIF
amp. to maintain the limiter amp.
input signal level at about 100dBp1/.
This pin also functions as a chroma
trap switch in the video section.
LOW level : ON
HIGH level : OFF
3.58 Trap
Loop Filter
This is a PIF PLL loop filter terminal.
This terminal contains a circuit to
select the desired loop filter time
constant during PLL sync. Det.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
AFT Output
This is an AFT output pin.
The AFT output is monopolarity.
The AFT function can be muted by
driving the AFT tank pin LOW.
PIF VCC
This is a PIF circuit VCC pin.
It is recommended that a trap for the
PIF carrier frequency be inserted in
series to prevent characteristics
degradation due to current leakage
from VCC- (In the applications circuit
example, a 68pH coil is inserted.)
VCC = 9V (Typ.)
VCXO Input
Connect a crystal resonator-based
resonance circuit between this pin and
the VCXO drive pin to configure a
color sub-carrier oscillator circuit.
Although APC is applied to the burst
signal when the chroma signal is
input, VCXO becomes a free-running
oscillator by connecting the OSD
brightness control pin to VCC with
APC Filter
This is an APC filter terminal for color
sub-carrier PLL.
APC is applied to ensure that the
burst signal of chroma input is phase-
locked to the VCXO oscillator output
signal.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
VCXO Drive
Connect a crystal resonator-based
resonance circuit between this pin and
the VCXO input pin to configure a
color sub-carrier oscillator circuit.
Because the VCXO oscillator output
signal is referenced to by the built-in
filter automatic adjustment circuit, it is
necessary that the VCXO free-running
frequency be adjusted to 3.579545MH2
by using an external time constant.
Tint Control
This is a Tint control pin.
The tint can be adjusted +55° by
using DC voltages of 1 to 4V.
An APC tint circuit is used here.
Color Control
This is a color control pin.
The color gain can be adjusted 40dB
by using DC voltages of 1 to 4V.
When the killer circuit turns on, the
voltage on this pin is pulled LOW to
turn off the color-difference output.
When connected to VCC with 2.2k0,
this pin can be used to observe the
chroma filter output signal.
V/C/DGND
This is a GND pin for the video,
chroma and deflection circuits.
These are R, B and G OSD input pins.
When OSD is ON, the color-difference
output for that color is set to 6.9V,
and other color-difference outputs are
set to 5.4V.
The -Y output generates a DC voltage
that is determined by the voltage on
the OSD brightness control pin during
that time.
The OSD-ON threshold voltage is 1.0V.
OSD is ON when the voltage is HIGH
or open : OSD is OFF when the
voltage is LOW.
H -Y OSD
Color-difference OSD
0.16mA
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
Fast Blanking
This is a fast blanking input pin.
When OSD is ON, the color-difference
output generates 5.4V, and the -Y
output generates a DC voltage that is
determined by the voltage on the
OSD brightness control pin during that
The OSD-ON threshold voltage is 1.0V.
OSD is ON when the voltage is HIGH
or open : OSD is OFF when the
voltage is LOW.
OSD R, B and G are given priority.
-Y OSD
R-Y Output
B-Y Output
G-Y Output
These are color-difference output pins.
The minimum load resistance these
outputs can drive is 2.5m.
25 son
-Y Output
This is a -Y output pin.
Vertical blanking is disabled by
connecting the OSD brightness control
pin to VCC with 1000.
The minimum load resistance this
output can drive is 3.5kQ.
Blanking
0.25mA
This is a VCC pin for the horizontal
sync. circuit.
Because a large current flows in the
horizontal output circuit, make sure
that the impedance of the wiring
patterns, etc. is sufficiently small and
that the bypass capacitors are
sufficiently strong.
H.Vcc=6.8V (Typ.)
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
H. Phase
Adjustment
This is a horizontal phase control pin.
The horizontal phase can be adjusted
-lps by using a DC voltage from
GND to H.Vcc.
Use this function to adjust the offset
of the horizontal screen position.
32fH VCO
Connect a 32fH ceramic filter to this
Because the horizontal sync. and
vertical sync. circuits use a count-down
system. no adjustments are required
for these sync. circuits.
This is an overvoltage protection input
When the voltage applied to this pin
is 3.5V or more, the horizontal
oscillator output is turned off, and the
chip is placed in an overvoltage-
protected state (pin voltage=4.2V).
The protected state is cleared when a
holding current of 100 is absorbed
from an external source.
Connect a bypass capacitor of about
10,aF to prevent erratic operation
caused by pulse leakage from the
vertical output pin or inclusion of
external noise.
V. Output
This is a vertical pulse output pin.
This pin outputs a TTL-level, 10H-wide
pulse of the positive polarity. Connect
this pin to a pulse input type of
vertical output IC. (e.g., the TA8445K)
The vertical oscillator circuit uses a
count-down system: when an off-
standard signal is input, it oscillates at
The minimum load resistance this
output can drive is 4.1kn.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE
AFC Filter
This is an AFC filter terminal for the
horizontal oscillator PLL.
AFC is applied using the sync. signal
and FBP to control the 32fH VCO
oscillator.
H. Output
This is a horizontal output pin.
Its duty cycle is 37.5%.
The minimum load resistance this
output can drive is 5000.
FBP Input
This is a FBP input pin.
This signal is referenced to when
generating the horizontal AFC, gate
pulse, and horizontal blanking.
Because a sync. separation output is
superimposed on the pulse as it is
input to this pin. this input can be
used for the microcomputer to
determine whether or not a signal is
present.
The FBP width is 12ps (Typ.)
2000 5kfl
x Sync. Signal--
JI. 2VF
Sync. Sepa.
This is a horizontaI/vertical sync.
separation input pin.
The horizontal sync. is separated as
the input coupling capacity is charged
and discharged, and the vertical sync.
is separated as the built-in capacity is
charged and discharged.
The continuity of the vertical sync.
separation signal is checked to
determine whether standard or not.
The sync. separation level is
Horizontal sync. : 30%
Vertical sync. : 35%
TOSHIBA
TA8725AN
No. PIN NAME
FUNCTION
INTERFACE CIRCUIT
36 Control
OSD Brightness
This is an OSC brightness control pin.
The -Y output voltage when OSD is
on can be adjusted using a DC voltage
of 0 to 8V.
When this pin is connected to VCC
with 1000, VCXO becomes a free-
running oscillator and the horizontal
and vertical blanking for the -Y
output are disabled.
F-- OSD brightness control
VCXO free-running
Brightness
37 Control
This is a -Y brightness control pin.
The -Y output pedestal level can be
adjusted between 2 to 7V for
brightness control by using a DC
voltage of 1 to 4V.
38 Clamp. Filter
This is a clamp. filter terminal for the
-Y signal DC restoration.
The DC restoration rate correcting
pulse added in the APL Det. circuit is
DC-restored 100%.
Contrast
39 Control
This is a -Y contrast control /chroma
uni-color control pin.
The contrast and uni-color can
respectively adjusted 20dB by using a
DC voltage of 1 to 4V.
This pin is pulled LOW, the vertical
output pulse is disabled. This pin can
be used for service mode when
shipping from the factory.
Contrast
Service switch
40 V/C/D Vcc
This is a VCC pin for the video,
chroma and deflection circuits.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
Video Input
This is a video (-Y) signal input pin.
Because a video trap and delay line
are built-in here, you can do away
with an external filter. The standard
input signal is a 1.0Vp-p composite
video signal.
E 6 Clamp F-
Sharpness
Control
This is a sharpness control pin.
The added pulse quantity can be
adjusted from -5% to 15% by using
a DC voltage of 1 to 4V.
When this pin is pulled LOW, the
vertical counter of the sync. count-
down circuit is reset. Make sure this
pin is pulled LOW when the TV set is
switched on and channels are switched
Sharpness
Chroma Input
This is a chroma signal input pin. This
terminal contains a take-off filter for
signal from PIF and a band-pass filter
for external input. Selection between
the two chroma filters is determined
by the DC voltage on this pin.
LOW level : Band-pass filter
HIGH level : Take-off filter
This pin has a 0.4V hysteresisto
prevent the filters from being
inadvertently switched over by the
chroma signal. The standard chroma
input is 280mup-p.
- Chroma
- Filter
APL Filter
This is an APL Det. filter terminal.
The DC restoration rate is eased by
adding a DC restoration rate
correction pulse to the Y signal after
detecting APL in video input signal
and then restoring this pulse 100% in
the final stage.
The DC restoration rate can be
adjusted by changing the filter
constant.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
Black Level
This is a black level Det. filter
terminal.
If detects the blacker-than-black level
that determines the black-stretch gain.
Its Det. sensitivity is determined by the
value of an external resistor.
The recommended value of the
external CR time constant is
approximately 0.1s.
The black-stretch start point is 50 IRE.
The peak black-stretch level is 15 IRE.
2 Black Det.
85k0 33k!)
PIF Output
This is a PIF Det. output pin.
It generates a 2Vp-p Det. output for
the standard PIF input.
Although this is a split input type of
PIF, make sure that this output is
passed through and SIF trap before it
is input to V/C/D, because the SIF
component cannot always be
completely removed depending on the
SAW filters used.
The minimum load resistance this
output can drive is 2.7kQ.
RF AGC Delay
RF AGC Output
These are RF AGC delay level
adjustment pins.
Use these pins to adjust the tuner's
gain according to the field strength.
Connect a PLL VCO tank coil for PIF
Det. to this pin.
Vary the capacitance of the built-in
varicap to adjust the VCO oscillation
Tim (D
48 VCO Tank 1 frfweyr The tdjustmerlt range is @ mm H.
determined by the capacitance ratio
49 VCO Tank 2 .
with respect to the resonance (is) "-
capacitor. An approximate guide for
this adjustment is such that a 30pF ff
resonance capacitor provides a 2.3MHz - (CO
wide adjustment range.
50 2nd AGC This is a PIF 2nd AGC filter terminal. See pin 2.
TOSHIBA
TA8725AN
PIN NAME
FUNCTION
INTERFACE CIRCUIT
AFT Tank
Connect an AFT tank coil to this pin.
The AFT function can be muted by
driving the voltage on this pin below
defeat
SIF VCC
This is a VCC pin for the SIF
demodulation circuit.
It is recommended that a trap for the
PIF carrier frequency be inserted in
series to prevent characteristics
degradation due to current leakage
from VCC- (In the applications circuit
example a 68pH coil is inserted.)
Vcc=9V (Typ.)
Demodulation
Limiter Output
These pins generate a 90° phase-shift
signal for FM demodulation.
The audio signal is muted by driving
the voltage on pin 54 below 0.3V. The
voltage on pin 56 at this time is
about 4.5V.
This terminal can be made adjustment-
free by connecting a ceramic
discriminator. However, adjustment is
required for sound-multiplex
demodulation, because the Det.
bandwidth must be sufficiently large.
For this adjustment, it is recommended
that a tank coil and damping resistor
be inserted in parallel.
Audio Output
This is an audio output pin.
When feeding this output to and
external circuit, connect a 75ps de-
emphasis circuit.
The audio output is 1Vp.p (Typ.).
The minimum load resistance this
output can drive is 3.5k0.
TOSHIBA TA8725AN
CONTROL SWITCH FUNCTION
(el CHARACTERISTIC FUNCTION CONDITION
2 EIA Decoder Low : IF Amp. gain is fixed min. 0.2V
50 AFT Defeat Low : AFT Defeat 2.1V
54 Audio Mute Low : Sound Mute Pin 56 : 4.1V 0.3V
. . . . Connected with
17 Chroma Output High . Chroma signal can be Monitored at pin 17 VCC by 2.2kQ
36 VCXO Free-run High : VCXO Free-run, H, V-Blanking on -Y output 8.3V
39 V Stop Low : V. Pulse Stop 0.4V
42 V Counter Reset Low : Internal V. Counter reset 0.5V
. High : BPF 4.1V, 4.5V
43 Chroma Filter Select Low : TOF selected Shmittriger
Low : Chroma Trap is selected.
9 fSC Trap High : Pass the Trap 0.3V
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 12 V
Power Dissipation PDmax 1.92 (Note) W
Input Terminal Voltage Vin GND-0.r-vcc+0.3 V
Input Signal Amplitude em 4 Vp-p
Operating Temperature Topr -20--65 °C
Storage Temperature Tstg - 55--150 ''C
(Note) When using the device at above Ta =25°C, decrease the power dissipation by 15.3mW
for each increase of 1°C.
15 2001-06-25
TOSHIBA TA8725AN
RECOMMENDED CONDITION FOR OPERATING
CHARACTERISTIC SYMBOL MIN. TYP. MAX. UNIT NOTE
PIF Supply Voltage Vccp 8.1 9.0 9.5 V -
SIF Supply Voltage VCCS 8.1 9.0 9.5 V -
V/C/D Supply Voltage VCCV 8.1 9.0 9.5 V -
H.Vcc Supply Voltage H.Vcc 6.5 6.8 7.1 V -
Video Input Signal Vin41 - 1.0 - Vp-p Involving Sync. Signal
Chroma Input Signal Vin43 - 286 - ml/p-p Burst Signal Amp.
Sync. Input Signal Vin35 1.0 2.0 - Vp-p -
V16, 17, 39 1.0 - 4.0 V TINT, Color, Contrast
DC Control Voltage V37, 42 Bnghtnfess, Sharpness
V36 3.0 - 6.0 V OSD Brightness
v28 GND - HA/CC v H.Phase
FBP Width TFBp IO 12 - #5 Pin 34 Vth = 21/F
FBP Input Current IFBpmax - 1.0 1.2 mA -
Video Output Load Resistance ROV 2.7 7.5 - kfl -
Sound Output Load Resistance Ros 2.6 8.2 - kn -
-Y Output Load Resistance RO-Y 3.5 10 - Observe these conditions
Color Differential Load kn durin external blankin
Resistance RORGB 2.5 10 - periog. g
H. Output Load Resistance RHOUT 0.5 0.8 - kfl -
V. Output Load Resistance RVOUT 4.1 5.7 - kit -
TOSHIBA
TA8725AN
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vcc=9V, H.Vcc=6.8V, Ta = 25°C)
DC CHARACTERISTIC
Terminal voltage
CHARACTERISTIC SYMBOL EEFSKT TEST CONDITION MIN. TYP. MAX. UNIT
PIF Input 1 V3 - - 4 3 4.6 4 9
PIF Input 2 V4 - - 4 3 4.6 4 9
SIF Input V5 - - 3 0 3.3 3 6
SIF Output V8 - V7=2.5V 2.7 3.0 3.3
Limiter Input V9 - - - 4.6 -
Loop Filter V10 - V30 = 3V 3.8 4.1 4.4
VCXO Input V13 - - 2.8 3.1 3.4
APC Filter V14 - - 5.9 6.35 6.8
VCXO Drive V15 - - 5.9 6.25 6.6
Tint Control V16 - OPEN - 5.0 -
Color Control V17 - OPEN, V36=9V - 5.0 - V
R-Y Output V23 - - 5.0 5.35 5.7
B-Y Output V24 - - 5.0 5.35 5.7
G-Y Output V25 - - 5.0 5.35 5.7
32fH VCO V29 - - 3.4 3.7 4.0
AFC Filter V32 - - 2.1 2.35 2.6
Video Input V41 - - 3.6 3.9 4.2
Chroma Input V43 - OPEN 5.7 6.1 6.5
APL Filter V44 - OPEN 4.8 5.25 5.7
Black Level Det. V45 - - 5.5 5.9 6.3
RF AGC Delay V47 - OPEN 4.3 4.7 5.0
FM Det. Input V54 - - 3.15 3.45 3.75
Supply current
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
PIF Supply Current Iccp - VCC=9V 10 20 25
SIF Supply Current Iccs - VCC =9V 10 20 25 mA
V/C/D Supply Current 'CCV - Vcc=9V 55 72 90
H.Vcc Supply Current H.ICC - H.Vcc=6.8V 13 15 25
17 2001-06-25
TOSHIBA TA8725AN
AC CHARACTERISTICS
PIF stage (PIF typical input level : 58.75MHz, 95dBpV)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
PIF typical input level
PIF Detected Output V01 - m=87.5%AM 1.7 2.0 2.3 v
Level PIF typical input level p-p
V02 - m =110%AM 2.0 2.5 3.0
. . . fm=15.75kHz, m=30%AM
PIF Sensitivity VIN MIN - -3dB Point 39 43 47 dB/A/
fm =15.75kHz, m = 30%AM
Max. PIF Input Level VIN MAX - +0.5dB Point 94 100 - dB/A/
. PIF typical input level
Sync. Tip Level VSYNC - m =87.5%AM 2.6 2.9 3.2 V
. No input, V50=3V,
No Signal Level " - Measure the V46 4.8 5.2 5.6 V
PIF typical input level 0
DG DG - m = 87.5%AM - 2 5 4’
PIF typical input level 0
DP DP - m = 87.5%AM - 2 5
PIF Output Frequency
Characteristic fc - (Note 1) 5 7 10 MHz
Suppression Carrier CR 45 50 -
. - N te 2 dB
Suppresgon 2er HR ( o ) 45 50 -
Harmonic Carrier
'lt,'; Noise Inverter VBTH IS 2.1 2.4
Black Noise Clamp - (Note 3) V
Level VBCL 3.4 3.7 4.0
ll/tde Noise Inverter VWTH 5.5 5.8 6.1
White Noise Clamp - (Note 4) V
Level VWCL 3.4 3.7 4.0
PIF Input Impedance Rip”: - V50=3V - 1 5 - k9
PIF Input Capacitance Cip”: - V5o=3V - 3.8 - pF
S/N S/N - (Note 5) 52 55 - dB
920kHz Beat 1920 - (Note 6) 38 45 - dB
IF AGC Range RWAGC - RWAGC=V|N MAX-VIN MIN 54 57 60 dB/A/
18 2001-06-25
TOSHIBA TA8725AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
PIF Input : 58.75MH2 CW
VSOMRAN Measure the voltage of pin 50. 5.3 5.6 5.9
IF AGC v Ita v Input Level 8 3 8 5 v
o e - . . -
g SOMAX 84dBpV : VSOMEAN
V 110dBpV : VSOMIN 3 0
SOMIN No Input : VSOMAX - . -
Adjustment VR47 to maintain
V51MAX v51 =4.5v. 8.5 9.0 -
RF AGC Output - Input Level V
V V51MAX 1 No input - 0 0.5
51MIN V51MIN : 110dB/zV
. AV51
RF AGC Gain GRF AGC - GRF AGC--20tog T 38 41 44 dB
- No input, V50=3V,
AFT Center Voltage V11CRNT Measure the voltage of V11 3.0 4.5 6.0 V
AFT Mute-offset
Voltage V11OFFS - (Note 7) - 2.0 0 2.0 V
V1 1 MAX fm =15.75kHz, m = 30%AM 8.3 8.6 -
AFT Voltage - . V
Measure the voltage of pm 11.
1/11MIN - 0.3 0.7
AFT Sensitivity /WFT - Center : f=58.75MHz - 20 25 kHz/V
VCO Control Sensitivity AFuco - - 1.0 1.5 - MHz/V
. fph Center : f=58.75MHz 0.5 0.7 -
VCO Pull-in Range fy - Center : f=58.75MHz 0.5 1.0 - MHz
19 2001-06-25
TOSHIBA TA8725AN
SIF stage (Typical SIF input level : f=4.5MHz, fm=400Hz, FM 25kHz/devi, 100dBpV)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
PIF input 58.75MHz, 75dBp1/
1st SIF Output Level l/sl SIF input 54.25MH2, 75dBpV 90 100 110 dBpV
- V51 : 4.5MHz level of SIF output
V1 AGC I
SIF AGC Voltage V1 AGC Pin 1 voltage in this condition 3.2 3.5 3.8 V
. Gs MAX 9 13 17
st SIF Gain GS MIN Note 8 -11 -15 -19 d
1st SIF Input Impedance Rig”: - - - 1 - kn
1st SIF Input . - -
Capacitance C's”: 2 pF
Limiter input :
A di o t t L I VAAC 4.5MHz, fm=400Hz 350 450 600 mVrms
u IO u pu eve v - FM 25kHz/devi, 100ngv 4.2 4 4 v
ADC 75ps De-emphasis output . .5 .8
Limiter input :
4.5MHz, fm =400Hz
AD Distortion KAUDIO - FM 25kHz/devi, 100diVN - 0.3 1.0 %
75ps De-emphasis output
distortion
FM OFF
AMR AMR - 30%AM V56Ac/VAAC 48 58 - dB
Limiting Sensitivity VLIM - Input Level -3dB point - 35 45 dBp1/
. fAUDit0H . 70 110 -
AF Bandwidth fAUDIOL - Input frequency 3dB point -70 -110 - kHz
TOSHIBA TA8725AN
Video stage
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Input Impedance Ri41 - - 100 - - kn
Input Dynamic Range Vdi41 - Concerning video signal 0.9 1.0 1.2 V
. . Contrast : Max.
Video Gain G-Y - Black Expander : OFF 4.7 5.5 6.0
Video '?e.tly.ency f-Y - -3dB Point 7.0 8.0 - MHz
Characteristic
. Input ll/p-p Brightness and
Output Min. Voltage Vdo1 - contrast : Max. - 1.2 1.5 V
Black Peak Level RBOUT 2 5 8
Black Expander Start - (Note 9) IRE
Point RBSTP 40 55 68
DC Restoration Ratio TDC - (Note 10) 98 103 106 %
V42 = 1.5V
Sharpness Control GSHcent Sharpness shoot ratio 5 0 5 1y
Characteristics GSHmax - V42 =4V Sharpness shoot ratio 25 40 55 o
GSHmin V42 =1V Sharpness shoot ratio - 15 - 12 -8
Sharpness Delay Time tSHDLY - Sharpness shoot width - 160 - ns
Contrast Control . .
Characteristics AGCNT - Y total gam variable range 18 20 - dB
. V37 = 2.5V
Irightnte fontrol VBRTCEN - Pedestal level of -Y output 4.4 4.7 5.0 V
Characteristics . .
AVBRT - Brightness variable range $2.5 $2.8 -
H, V-BLK Output Level VBLK - - 8.5 8.9 9.0 V
V-BLK Width TVBLK - - - 16 - H
Chroma Trap Gain Gtrap - - - - 18 - 15 dB
TOSHIBA TA8725AN
OSD stage
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
OSD Switching .
Threshold VthOSD - R, G, B fast blacking 0.7 1.0 1.3 V
OSD Delay Time tOSDDLY - - 15 40 ns
OSD Delay Time OSD brightness control :
Tracking AtOSDD - center - 15 30 ns
OSD Rising Time TR - -Y output width - 15 40 ns
OSD Falling Time 21: - - 18 40 ns
OSD color difference output
OSD Color Difference VOSDDIF level 6.4 6.7 7.0 V
Output Level - Output clamp level of other
VOSDCLP colors. 4.0 4.3 4.6
OSD Brightness Control VOSDCEN - 1/36=4.5V OSD-Y output level 3.2 3.9 4.6 V
Characteristics AVOSDY OSD-Y output variable range 6.0 6.5 7.0
22 2001-06-25
TOSHIBA TA8725AN
Chroma stage (Typical chroma input level OdB : 286mVp-p, fsc=3.579545MHz)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Input Impedance Ri43 - SW43 : OPEN - 3.0 - kn
Input Dynamic Range Vdi43 - Include sync. and video signal 1.0 1.5 1.7 V
ea -23 -20 - 17 dB
ACC Characteristics eb - (Note 11) 3 6 9
A 0.9 1.00 1.1
Color Killer Point EK - Killer OFF-IN -46 -43 -37 dB
Color Control vCLRCEN - Pin. 17. voltage at which color 2.2 2.5 2.8 v
. . galn IS center.
Characteristics . .
AGCLR - Color gam variable range 40 43 - dB
Pin 39 voltage at which Uni-
Uni-color Control VUNICEN - color gain is center 2.2 2.5 2.8 V
Characteristics i, .
I I AGUNI - Chroma Uni color variable 18 20 - dB
TINT Control VTNTCEN - (Note 12) 2.2 2.5 2.8 V
Characteristics ABTINT - Tint variable range 75 85 100 o
VCXO Control Range AfVCXO - - i500 i650 - Hz
VCXO Control
Sensitivity fNoay - - - 1.0 - Hz/ mV
vcxo PuII-in Range fVCXOPL - - i400 i550 i750 Hz
VDM - - 4.8 5.4 6.0 v
Color Difference
- - - + +
Output DC Level AVDM -+0.1 -+0.3 V
Color Difference . .
Output Amplitude EBmax - (B-Y) Maximum amplitude 4.2 4.5 - Vp-p
. . R / B (R-Y) / (B-Y) 0.80 0.84 0.90
Relative Am litude -
p G/B (G-Y)/(B-Y) 0.25 0.28 0.31
Relative Phase R-B - - 97 105 113 o
G-B - 241 249 257
. . ECR - 20 30
Color Differential . .
Output Residual Levels ECB - Color, Uni-Color . Center - 20 30 ml/p-p
ECG - 20 3O
Video-chroma Delay (Video delay time)
- - . - 4 7
Time W C - (Chroma delay time) 0 5 ns
23 2001-06-25
TOSHIBA TA8725AN
Deflection stage
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
. . . (Free run frequency)
Horizontal Oscillation fH - - (15.734kHz) 100 100 300 Hz
H. Output pulse Duty TH - - 35 37 40 %
H. Output Level VHL - H. Output low level voltage - 0.2 0.3 V
VHH - H. Output high level voltage 4.2 4.6 -
. HA/CC voltage at which 32fH
H. VCO Start Voltage VOSCmm - VCO starts to oscillate 3.4 3.6 4.0 V
H. Output Start
Voltage VHST - HA/CC 4.1 4.3 4.5 V
H. Frequency Control AfH - Center : fH=15.734kHz 1500 i650 - Hz
H. VCO Control
Sensitivity [3H - - - 350 - Hz/V
H. AFC PulI-in Range AprUL - Center : fH=15.734kHz $450 :500 - Hz
X-ray Protect Detection
V .2 . .
Voltage XDET 3 3 5 3 8 V
X-ray Protect Holding
V - N 1 . 4.2 4.
Voltage XHLD ( ate 3) 3.9 5
X-ray Protect Holding
I 1 12 A
Current XHLD 80 00 0 #
Vertical Frequency fV - Free run frequency - 262.5 - H
V. OSC Pull-in Range TVST - V. P/P Itartiy time - +32 - H
TVEND V. Pull-in stopping time - -32 -
V. OSC Pulse Width TV - - - 10 - H
V. Output Pulse Level VVL - V. Output low level voltage - 0.2 0.3 V
VVH V. Output High level voltage 4.8 5.3 -
H. Sync. Sepa. Level Rsepa - (Note 14) 10 16 25 %
TOSHIBA TA8725AN
TEST CONDITION
(Note 1) PIF output frequency characteristic
(1) PIF input f=58.75MHz, 84ngV, CW
(2) Fix the voltage of 2nd AGC on this condition
(3) PIF input fo=58.75MHz, 84dBpV
f1=58.65-45MHz, 74dBp1/
(4) Measure f1 at which PIF output turns to -3di?
(5) fc = to - f1
(Note 2) Suppression carrier, suppression 2nd harmonic Carrier
(1) PIF input f=58.75MH2, fm=15.75kHz, 84dBpV, 78%AM
(2) Apply external voltage to get 2Vp-p PIF output
(3) Measure the carrier leakage in PIF output with spectrum analyzer. (no modulation)
(4) 2 (I/p-p)
CR = 20fog_.f-5'r,
Carrier leak (mi/rms)
(5) Measure the suppression 2nd harmonic carrier in same way.
(Note 3) Black noise inverter level, black noise clamp level
(1) PIF input f=58.75MHz, fm=15.75kHz, 84dBpV, 30%AM
(2) Raise the 2nd AGC voltage up to a level to get following wave form, and measure A, B
voltage.
A : Black noise clamp level
B : Black noise inverter level
PIF output wave form
25 2001-06-25
TOSHIBA TA8725AN
(Note 4) White noise inverter level, White noise clamp level
(1) PIF input f=58.75MHz, 95tiBpu, CW
(2) Detune the VCO tank, monitor the PIF output and measure A, B voltage.
A : Black noise clamp level
B : Black noise inverter level
PIF output wave form
(Note 5) S/N
(1) PIF input f=58.75MHz, 95dBp1/
A : fm=15.75kHz, 30%AM
B : CW
(2) Measure the voltage of PIF output
SN = 20fog (v_A x 5) [dB]
(Note 6) 920kHz beat
(1) PIF input f0=58.75MHz, 84dBpV
fc=55.17MHz, 74dBpV
fs=54.25MHz, 74dBpV
input with Mix. pad.
(2) Apply external voltage to get same level PIF output low level and VSYNC.
(3) Measure the ratio of "fc components VS 920kHz beat components" with spectrum
analyzer.
(Note 7) AFT Mute-offset voltage
(1) PIF input No input, V50=3V
(2) Measure V11 at AFT mute SW on : V11MUTE
(3) V11OFFS =V11CENT-V11MUTE
26 2001-06-25
TOSHIBA TA8725AN
(Note 8) 1st SIF gain
PIF input f0=58.75MHz, 75dBpV
SIF input fs=54.25MHz, 75dBp1/
Measure the level of the 4.5MHz component from the 1st SIF output pin. V8
When the SIF input level is varied under the following conditions, relative to V8
Input level difference at -3dB : Gs MAX However, V1=4.5V
Input level difference at +3dB : GS MIN However, V1=3.0V
(Note 9) Black peak level and black expander start point
(1) Input the Il/p-p video signal shown below to the video input.
(2) Disable the black-stretch function by setting V45=5V
(3) Measure the blacker-than-black blanking level RBOUT at the -Y output and the black-
stretch start level.
---------__ RBOUT
Input signal : BIacker-than-black blanking level 15IRE -Y output
(Note 10) DC restoration
(1) Disable the black-stretch function by setting V45=5V. With pin 44 left open.
(2) Vary the video input APL 10~90%.
(3) Adjust the video signal amp. litude at the -Y output to become 1.25V.
(4) Assuming that the pedestal level change due to APL changes is AVpede: then
TCD= (IU-duped-s) x100 [%]
(Note 11) ACC characteristic
(1) Connect the color control pin to VCC with 2.2 kn. 5
(2) 1/39=1V 'ii. I l
(3) While varying the burst level of the chroma input, ii i i
measure the burst level appearing at the color pin. U : L
(4) INPUT SIGNAL BURST LEVEL
- M 0dB=286mup-p
VB(-17dB)
27 2001-06-25
TOSHIBA
(Note 12)
(Note 13)
(Note 14)
Tint control characteristics
Input the rainbow color bar.
TA8725AN
Adjust the voltage of V15 until the No.6 color bar becomes maximum at the (B-Y)
output.
X-ray protect detection voltage, X-ray protect holding voltage, X-ray protect holding
CU rrent.
While varying external voltage source VX, measure VXDET and VXHLD.
Measure V30OFF, VXOFF
V300FF - VXOFF
IXHLD = 10m
8 V300FF_
> VXDET
Applied external voltage VX
H. Sync. sepa. level
Input a white-100 % signal (Where the sync. signal
level is small every 10H) to the sync. separation pin.
While observing the sync. signal appearing at the
FBP input pin, measure the Rsepa level at which the
sync. signal does no longer appear.
Rsepa 100%
Sync. separation input
TEST CIRCUIT
SID 1W
Mn Jef mo
615)°5
i’HO'O
Mu'o UlS
aipf LO'O
it--e _
:U/LO'O
grf 5 UISL
aiiiol
t''U-_,
grfrtrtr
in‘LV'G
1ODOpF
1 'l I 13 1 n m 9
TC74HC123P
1 z 3 a 5 6 7 8
1500pF
uxa' l
grf TIVO
3 31 3 29
Output Output Demov
Limiter FM
1st PIF
AGC Input
RF AGC 2nd
Output AG:
5" Sync.
in put Det.
VCO VCO RF AGC
Tank Tank De‘ay
SIF Limiter Loop
Omput Input filter
Output
APL Chroma Sharpness Video VICID Contrast (lamp Erightness OSU Sync.Sepa. FEP H.0utput
Control Brightness
F! Iter input
8725AN
VCXO APC VCXO Tint
Input Filter Drive
Comrnl Input
Comm! Contro‘
Control Filter
Control
VICID OSO OSD
GND R B G
OSD Biank Ing
AFC V. Output X-RAY 32m VCO
Fillet
~Y H.Vcc HPhasa
grfrtro
(ii) 7
:ITHOO
8 - 9 10
0,01,“:
grftr 0 U005
oo Ali'l Th
mosn Ulusl
adoozz
oirtro
HII’BS
me: dry Lo'oEES ,
Z Trimmer
drdt"T
+ -tPE E
dritttro E
i’l'lO'D
27pF l
18 1 2 1
d” “To
Z 2 Q9 2
F--t uxl
JTIODL
TA8725AN - 29
O Vcc = 9V
TOSHIBA
TA8725AN
TOSHIBA TA8725AN
ADJUSTING MEASUREMENT CIRCUIT
1. PIF VCO tank coil
(1) Make sure that nothing is fed to the PIF input, then fix the 2nd AGC pin to 3V.
(2) Measure the voltage on the loop filter pin. VA
(3) Release the voltage on the 2nd AGC pin fixed to 3V.
(4) PIF input f= 58.75MHz, 84dBpV
(5) Adjusting the VCO tank coil until the voltage on the loop filter pin equals VA.
2. AFT tank coil
(1) Make sure that noting is fed to the PIF input, then fix the 2nd AGC pin to 3V.
(2) Measure the voltage on the AFT output pin. V11CENT
(3) Release the voltage on the 2nd AGC pin fixed to 3V.
(4) PIF input f= 58.75MHz, fm =15.75kHz, 84dBp1/, 30%AM
(5) Adjust the AFT tank coil until the voltage on the AFT output pin equals V11CENT.
3. FM demodulation coil
(1) Make sure that noting is fed to the limiter input.
(2) Measure the voltage on the audio output pin. VADC
(3) Limiter input f=4.5MHz, 100dBpV, non-modulated
(4) Adjust the AFT tank coil until the voltage on the audio output pin equals VADC.
4. VCXO oscillation frequency
(1) Make sure that noting is fed to the chroma input, and connect the OSD brightness control
pin to VCC with 1000.
(2) Measure the voltage on the APC filter terminal. VApC
(3) Chroma input f=3.579545MHz, 280mVp-p, CW
(4) Adjust the trimmer capacitor at the VCXO drive terminal until the voltage on the APC
filter terminal equals VApc.
PRECAUTIONS TO BE TAKEN WHEN MEASURING ELECTRICAL CHARACTERISTICS
1. When measuring the PIF VCO oscillation frequency, measure the leakage component from the
PIF output pin with spectrum analyzer.
2. When measuring the VCXO oscillation frequency, measure the leakage component from the color
difference output pin with a spectrum analyzer.
30 2001-06-25
TOSHIBA
DETAILS OF TANK COILS USED
TA8725AN
TANK PRODUCT
NAME NAME CONNECTION DIAGRAM ELECTRICAL CHARACTERISTICS
71.0MH2 -8% or more
Ci) o C f0 MAX (Auxiliary coil 30~100MH2)
AFT TRF-1028 co I 55.0MHz +8% or more
Coil f0 MIN ... .
Ci) Ci? FC (Auxiliary coil 30~100MH2)
C=PH1H620J Non-load Q Within 48h25% (f0 MIN)
f0 variable
Ci) 64MHzi3% (actual 58--70MHz)
Tank TRF-1118K C)
CO Non-load Q 11o:30%
Center 4.5MHz (nominal)
frequency
SIF C) D d I ti
emo U a Ion
Tank TRF 6010 CD a 1 output 77mVA10mV
CD- co
C=CC165R1H101J Tuning 4.467MHzLr11kHz
frequency
s G) Fixed L 0.52pH*10% (f=25.5MHz)
S . TRF-1058 Ci) 1
F G) Non-load Q Within 50:20% (f=25.5MHz)
Fixed L 0.65/1H i 10%
- - + o =
'it.? TRF-1090 (D-(i) Non load Q 85-15%: (f 25.2MH2)
Temperature
coefficient 0 - 60ppm
TA8725AN (for use in Japan)
TOSHIBA
TA8725AN
TANK PRODUCT
NAME NAME CONNECTION DIAGRAM ELECTRICAL CHARACTERISTICS
55.5MHz -8% L1:
Ci) o c f0 MAX (Auxiliary coil 30--100MHz)
AFT TRF-1223 C) " 42.8MHz +8% Li:
Coil f0 MIN ... .
Ci) CE FC (Auxiliary coil 30~100MH2)
C=PH1H750J Non-load Q Within 65125% (f0 MIN)
f0 variable 53.0MHzi3%
Ci) range (actual 50~70MH2)
VG.) TRF-1130D Ci)
(D Non-load Q 128i30%
Center 4.5MHz (nominal)
frequency
SIF GD D d I ti
emo U a non
Tank TRF 6010 Ci) a l output 77mVA10mV
CD- GD
C=CC165R1H101) Tuning 4.467MHz i11kHz
frequency
s Ci) Fixed L 0.52#H:10% (f=25.5MHz)
SAW'P TRF-1058 C) f
F GD Non-load Q Within 50k20% (f=25.5MHz)
Fixed L 0.65PH i 10%
- - + 0 =
SAWS TRF-1090 Ci)--C) Non load Q 85A15% (f 25.2MHz)
Temperature 0+60 m
coefficient - pp
TA8725AN (For use in U.S.)
APPLICATION CIRCUIT
(For Japan)
KiEh—d __<
TRFIT18
FBP Input
Output H. Output
tpir l
Audio Mute Slgnzl
from y—COM
dVtil -
Hritit
m“ agu-vms'l
azotsu;
319' L smrvmsw
IUXS'L aou-p-ms‘ L
015 L t1UO n 019 l
EN w o
zms‘v-Lt
Jtfttr
Autdg8 E315 t
ts'"t_-,ie
5 55 s 52 51 so 45 GL} 44 65) 42 41 no 39 3 3 3 (3?) :3
Audio Limfler FM 5' AFT RFAGC 2nd VCO VCO RF AGC PIF 9'3“ Chroma Sharpnm ““0 VICID Contrast Clamp arlqhtness 050 5ynn5epa.FaP H.0utpu't AFC V.0utput X-RAY 32m VCO
Outpm Outpu‘ Demo. Vcc Tank Output AG: Tank Tank De‘ay Output Lave} Input Cnntrol Input VCC Control finer mm|ay|ghmg55 my“ mum Fi‘ter
'"Wt 9“ Control
U’IZ'B
(dN) o".'."
A d’ - o 1
u m o -
Outpu: 7.§k
irILoo
dOLS A b-o",
ir/Lo i)
- grtt't
s-s,-;
gr/LV'O urs
> TA8725AN
SIF 1st PIF PIF P IS IV $\F PLL SIF Limiter Loop AFT PIF VCXO APC V(XO Tln! Color V l CID OSD 05D OSD Blanking
AGC AGE Input Input GND Input Sync. Dat Output Input Filter Outpm Vcc Input Filter Drive Contrm Contra‘ GND G Input R-Y B-Y G-V ~Y H.Vcc H.Phase
1 2 Q3) 4 s 7 9 1o 11 An 1 13 Q3) 15 17 1e 19 2 21 Q3 2 24 5 2 (33 2
m .- KIHer
g ‘g E
'rfuro
drfrty'0
t?,'i'r,
Mara our:
=fyy.eH
U4t E amu
F Hter -
oo 3rturo
drf 10'0
OW" l EU’ILW (3191
mew suxz’v ms]
dYIOUL-
Vcc=9V C
TOSHIBA
TA8725AN - 33
TA8725AN
TOSHIBA TA8725AN
PACKAGE DIMENSIONS
SDlP56-P-600-1.78 Unit : mm
f-lf-lf-lr-Tr-lf-IF-ll-lr-ill-lf-lf-lf-If-Ir-Trl..-]}-!.).)..]
14.0:02
LLu.dLdLJLLclL..lL..lt-lcjclclcllLclclclcll-ll-lcJclclclcJl-lulul
50.9MAX
5th4Hh2
0.51m: ‘3.5:o.2
1.197TYPs,
Weight : mama (Typ.)
M 2001-06-25
TOSHIBA TA8725AN
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
35 2001-06-25
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