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TA8712N-TA8796N
PIF QIF SYSTEM FOR TV
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT
TA8712N, TA8796N
TECHNICAL DATA SILICON MONOLITHIC
INTEGRATED CIRCUIT
TOSHIBA
PIF QIF SYSTEM FOR TV
FEATURES
PIF section
q 3-stage variable gain PIF amplifier _--------------""))),,
o High-speed response AGC with dual time constants ,<<’:/ /,//’:;:;:V? ,
q Single end AFT output with defeat function ''ii'ri,iir,r; -,-tr-,r5 ‘U (i ,
o Delayed RF AGC output (Reverse AGC) "i iii, l i u
o Black/White noise inverter l
q The AFT polarity of TA8712N different from TA8796N SDlP20-P-300
QIF section Weight : 1.02g (Typ.)
It Intercarrier demodulation section by the same
configuration as PIF section.
0 Independent average AGC circuit
AFT voltage
Frequency
t TA8796NI
- - - a
© The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TA8712N - 1
TOSHIBA CORPORATION for any infringements of intellectual property or other rights ot the third names which may result from its use. _
No license is granted by implication or otherwise under any intellccmal property or other rights of TOSHIBA CORPORATiON or others. Q) 1995 - 1 l - 13
© These TOSHIBA products are intended for use in general commercial applications (office equipment, communication equipment, measuring
eqmprnent,domestit appliances, etc.). please make sure that you consult With us before you use these TOSHIBA products in equipmem which
requires extraordinarily high quality andlor reliability, and in equipment which may involve life threatening or critical application, including but TOSHIBA CORPORATION
not limited to such uses as atomic energy control, airplane or spaceship Instrumentation, traffic signals, medical instrumentation, combustion
control. all types of safety devices, etc, TOSHIBA cannot accept and herebydisclaims liability for any damage which may occur in case the
iOSHIBA products are used in such equipment or applications without prior consultation with {OSHIBA
INTEGRATED CIRCUIT
TOSHIBA
TECHNICAL DATA
TA8712N, TA8796N
IF AGC
Filter-it
RF AGC
RF AGC Output
PIF Input
Filter
DIAGRAM
0.47;;F 519,
fBTW-G
0.01 F
J " IF AGC
D " Veer-l
Ci?, AFT Output
18 AFT Coil
Detector Cl
. Dt AFT
n 3rd 1> "9:. f! Defeat
IF U: _
tT: I tl (fir-; Video Coil
Video *2 D Video Ouput
L Detector Hm
AGC Noise
14 AFT v 12V
Detector Inverter C) CC ( )
30km T QUASI IF Coil
Video *
2 - 12
Detector
's, . 11 SIF Output
1st 2n 3rd *3 D
IF IF , IF
SIF *2
Detector
TERMINAL FUNCTION
*1 DC amplifier
*2 Preamplifier
*3 Limiter
l) PIN NAME FUNCTION INTERFACE CIRCUIT
. . . . 1r 1: J
This filter IS a dual time constant system CD
1 to speed up AGC. 2% I-v' Amp. AGC
20 AGC Filter By connecting the primary filterterminal (i) N a . Detector
of pin 20 to GND, a picture muting is T 1: g
executed. k t g, c:
1: a . O
This terminal adjusts the delay point of Ci) It? J-
2 AGC Delay RF AGC by varying the reference WV AGC
voltage of comparator. " c“
it i _ RF Output
TA8712N - 2
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA
TECHNICAL DATA
TA8712N, TA8796N
El? PIN NAME FUNCTION INTERFACE CIRCUIT
RF AGC Since this is an open collector output, 1 AGC
3 Output the. gain is determined by an external Ci)- Delay
resistor. 1
h" lr I/
This is an input terminal of PIF signal Ci) N
. . I/ H
4 PlF Input usmg an emitter folloyver. . Ci) E E . -
5 The input impedance IS typical 2.5kQ, ut m} E c1;
4pF. h" 7: N N E '
. . .. . lr 1!
This IS a quasu input terminal and (i) K
connects a sound output of dual SAW V --
8 . Ci) al a
9 QIF Input filter. x x s' .
When not using QUASI, connect this pin T; 7r :3 li' §== “g“:
to GND by capacitor. I cf
VCC g,
This connects QIF AGC filter. Ir m
Since AGC is executed by a video signal, AGC
10 AGC Filter there is no worry about the IF amplifier G soon I Detector
saturation by the video signal even if x
. . . C -AGC
the P/S ratio IS greater like CATV. 3;
VCC C)
Because SIF is detected by a video E E
carrier of 90° phase shifted, the video
11 QUASI Output signal will affect less and buzz will C) x C)
largely be improved.
TA8712N - 3
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA
TA8712N, TA8796N
TECHNICAL DATA
PIN NAME
FUNCTION
INTERFACE CIRCUIT
QUASI Coil
In order to influence less on video
signal buzz, the multiple detection is
executed by a 90° phase shifter of video
carrier.
Connect the tuning coil circuit of carrier
whose phase was 90° shifted to pins 12
and 13.
Video Output
This is a Video output terminal.
By connecting the primary filter terminal
of pin 20 to GND, a picture muting is
executed.
Video Coil
This connects a coil for video detection.
:L xsm
ah, I 3 Va:
6k0 4m
AFT Coil
Supply a control signal by single end.
This method is that the phase difference
is treated as current and voltage is
converted by an external resistor.
Therefore, this can be connected to AFT
using only one pin.
By connecting a resistor of 5.1kQ to
GND, an AFT defeat can be executed.
AFT Output
By connecting an AFT coil pin to GND,
a muting is executed.
TA8712N -4
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA TA8712N, TA8796N
TECHNICAL DATA
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VCC 15 V
Power Dissipation PD (Note) 1.4 W
Operating Temperature Top, - 20--65 °C
Storage Temperature Tstg -55--150 °C
(Note) When using the device at above Ta=25°C, decrease the power dissipation by 11.2mW
for each increase of 1°C.
RECOMMENDED SUPPLY VOLTAGE
'2) PIN NAME MIN. TYP. MAX. UNIT
7 Vcc 8.1 9.0 9.9 v
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Unless otherwise specified, Vcc=9V, Ta =25°C)
CHARACTERISTIC SYMBOL :cirszl: TEST CONDITION MIN. TYP. MAX. UNIT
Supply Current ICC 1 - 45 60 75 mA
Pin 4 v4 3.5 4.0 4.5
Pin 5 1/5 3.5 4.0 4.5
. Pin 8 vs 3.5 4.0 4.5
[ct,')) Pin 9 v9 1 - 3.5 4.0 4.5 v
Pin 11 V11 3.0 3.5 4.0
Pin 15 v15 4.1 4.4 4.7
Pin 19 v19 5.0 6.5 8.0
TA8712N - 5
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA TA8712N, TA8796N
TECHNICAL DATA
AC CHARACTERISTICS (Unless otherwise specified, VCC=9V, Ta =25°C)
PIF section (when using the specified video coil)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Input Sensitivity VIN 2 (Note 1) 28 34 42 dByV
Sync. Tip Level Voltage VSYNC 2 (Note 2) 1.5 2.0 2.5 V
AFT Sensitivity Af/AV 2 (Note 3) - 22 30 kHz/V
AGC Range AA 2 (Note 4) 60 - - dB
Max. vu 7.5 8.0 -
2 N t 5 V
AFT Output Voltage Min. VL f o e ) - 1.0 1.5
Black Noise Threshold Level VBTH - 1.5 -
Blask 'P? Clamp Level VBCL 2 (Note 6) - 3.0 - V
White Noise Threshold Level VWTH - 5.2 -
White Noise Clamp Level VWCL - 3.5 -
Carrier Wave Suppression
Ratio VCL 4 (Note 7) 40 50 - dB
Secondary Harmonics
. . V 4 -
Suppression Ratio 2nd (Note 8) 35 50 dB
. . . - o
D1fferent1a| Gain DG 5 (Note 9) 4 7 A;
Differential Phase DP - 3.0 5.0 o
RIN - - 1.0 2.5 4.0 k0
In t Im edance
pu p CIN - - - 3 6 pF
Intermodulation IM 4 (Note 10) 31 58 - dB
QUASI section (when using the specified quasi coil)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Input Sensitivity VIN 2 (Note 11) 30 36 42 dBp1/
Gain Reduction Characteristic GR 2 (Note 12) 60 64 - dB
4.5MHz Output Level VQD 3 (Note 13) 400 500 - mVp-p
Input Impedance RIN - - 1.0 2.5 4.0 k0.
CIN - - - 3 6 pF
Carrier Suppression Ratio CL 40 50 -
. 4 Same as PIF Note 6 dB
Secondary Harmgmc Ian ( ) 40 50 -
Suppression Ratio
TA8712N - 6
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA TA8712N, TA8796N
TECHNICAL DATA
TEST CONDITIONS
(Note I) Input Sensitivity
Input : Supply the P4, f=58.75MHz, fm=15.75kHz, 30% AM signal, Internal AGC.
Measure the input level when the output amplitude of P15A becomes 0.6Vp_p.
(Note 2) Synchronization Tip Level
Input : Supply the P4, f=58.75MHz, 84dB/A/, and CW.
Measure DC voltage of P15.
(Note 3) AFT Sensitivity
Input : Read the variation of P19 when increase/decreasing the frequency by supplying P4,
f=58.75MHz 84dB/zV, and CW.
(Note 4) AGC Range
Input : Supply the P4, f=58.75MHz, fm=15.75kHz, 30% AM signal.
When an external AGC voltage is 8.5V and 3.0V, each input level whose output voltage will
be 0.6Vp_p is treated as V1 and V2.
Then, calculate the following equation.
AA - 20809 L
(Note 5) AFT Output Voltage
Input : Measure DC voltage of P19 by varying the P4, f=58.75MHz, fm =15.75kHz, 30% AM
signal and internal AGC.
(Diagram below)
Voltage
I'- , TA8712N
Frequency
58.75MH
l TA8796NI
TA8712N -7
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA
TA8712N, TA8796N
TECHNICAL DATA
(Note 6)
(Note 7)
(Note 8)
(Note 9)
(Note 10)
Noise Threshold/Clamp Level
Sweep the input frequency up to external AGC 8.5V, frequency 57--63MHz and observe the
output level by monitor scope.
White noise threshold level
Black noise clamp level )
White noise clamp level
Black noise threshold level
Waveforms by monitor scope
Carrier Suppression Ratio
Input : Supply the P4, f=58.75MH2, fm =15.75kHz, 30% AM signal.
Adjust so that the output can be 21/p-p by external AGC.
Calculate the following equation by setting the modulation to 0 and measuring the output
carrier level.
V =20€og +
CL VCR (Vp-p)
Secondary Harmonic Suppression Ratio
Calculate the secondary harmonics using the same method as note 7.
Differential Gain, Differential Phase
Adjust the AGC voltage so that the sync. tip level will be 2V by supplying the f=58.75MHz,
APL 50%, and 87.5% AM signal. Measure by DG or DP meter.
Intermodulation
SG1 : 58.75MHZ (P) 84dBpA/, CW.
562 : 54.25MHZ (S) 78dBp1/, CW.
563 : 55.17MHz (C) 78dBp1/, CW.
Input in combination with the above three signal and adjust the AGC voltage so that the
min. D.C. voltage of output will be the same as the sync. tip level. Measure the difference
between the chroma signal and 920kHz signal by spectrum analyzer.
TA8712N -8
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TA8712N, TA8796N
TOSHIBA
TECHNICAL DATA
(Note 11)
(Note 12)
(Note 13)
Input Sensitivity
Pin 8 input
SG1 : 58.75MHz (P) 100dBpV, CW.
SG2 : 54.25MHz (S) 90dBpV, CW.
Input in combination with the above two signals. Measure the input level so that the
detection output will be half by lowering the input level gradually.
Gain Reduction Characteristics
Measure the input level so that the output can be Om/p-p under the following external
AGC supply.
Pin10=8.5V Input level V1
Pin10=3.0V Input level V2
From the above measurement value,
GR = 20tog (v1/v2) dB
4.5MHz Output Level
Measure the output level using the same input level of note 11.
TEST CIRCUIT 1
DC characteristic
LL LL u. I U.
rt 1 tl, m. 1
ct at ct at Switch G '
o o o o co'
20 19 18 17 16 (Ci) 13 12 (Q
'- +4 = = U 14.: F'
g a a a g g'd 58 13 12V
" 8 t g o tr. g C) LL LU
- t < 2. 8 < o t 3 d, +
4 u 32 3 cr, a I
i) > a > 5 0 C)
2 G' fr
IV - n.
N a O FI u. (e
bl U tl a 2 E
< 2 < s 3 U I' Ly 9V
2 e E t'cla. U7 gu 8 'd LL
1 2 3 4 5 6 7 8 9 10 3 (a +
u. SW LI. u. u. u. C m I
Cl 1 2 1 2t, 1 u. + t
SW1 G F G, G, A G, G, N
u. cl iii] cl cl cl cl l N
+ ts .1 pd
" ,- '
I ci M
5.1142 3.9142
TA8712N-9
1995 - 11 - 13
TOSHIBA CORPORATION
TOSHIBA CORPORATION
TA8712N - 10
1995 - 11 - 13
PlF Input
0: GND
| F AGCZ
" AGC Filter
RF AGC Output
Video Output
QUASI IF Input
QUASI Output
IF AGC1
RF AGC Delay AFI' Output
AFT Coil
Video Coil
AFT \ICC
QUASI IF
-'''-g
Defeat Switch
P15AP15
AC characteristics
TEST CIRCUIT 2
TECHNICAL DATA
TOSHIBA
INTEGRATED CIRCUIT
TA8712N, TA8796N
INTEGRATED CIRCUIT
TOSHIBA
TECHNICAL DATA
TEST CIRCUIT 3 QIF detection output VQD
TA8712N, TA8796N
Monitor scope
Test circuit 2
TEST CIRCUIT 4 Carrier, Secondary harmonic suppression ratio, Intermodulation
58.75MH2
54.25MHZ
553 ‘N.
55.17MHz
Attenuator Test circuit 2
PIF Input
TEST CIRCUIT 5 Differential phase, differential gain
Monitor scope
Spectrum
Video output
DG / DP measurement equipment
Signal
output
Signal input
Analyzer
Monitor scope
Modulator
f0 = 58.75MHz
APL=50%
Attenuator
IF input
Test circu it 2
TA8712N - 1 1
1995 - 11 - 13
TOSHIBA CORPORATION
INTEGRATED CIRCUIT
TOSHIBA
TECHNICAL DATA
TA8712N, TA8796N
OUTLINE DRAWING
SDlP20-P-300
l_| r1 l-l r1 r1 r-l (-1 l_| m m d
LI Cl Cl cl Cl |_l |_I Ll cl Cl "
, 19.1MAX ..
18.6i0.2 _
$1 CD.
D P 10. Fl
1.299TYP 1.0i0.1 0.46i0.1
= ' , ,. " -.jl_p,,se-L1saiii,
Weight: 1.029 (Typ.)
3.0i0.3
Unit : mm
TA8712N - 12*
1995 - 11 - 13
TOSHIBA CORPORATION
www.ic-phoenix.com
.
