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TA8899AF
FM DEMODULATION IC FOR BRODCASTING SATELLITE RECEIVER
TOSHIBA TA8899AF
TENTATIVE TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8899AF
FM DEMODULATION IC FOR BROADCASTING SATELLITE RECEIVER
TA8899AF combines the necessary function on a single
monolithic integrated circuit to demodulate FM signal of
the 2nd IF of DBS.
FEATURES
It 5V single power source
0 2nd IF AGC amplifier (AGC range 50dB or more)
It Logarithmic-linear type signal level amplifier
o PLL type FM detector (variable impedance built in) SSOP30-P-375-1.00
Weight : 0.63g (Typ.)
o Adjustment free AFT circuit (IF frequency direct count
type digital AFT) and also designed for keyed AFT system
It Output terminal of 1'st AGC control circuit
000707EBA1
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 equi ment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These
TOSHIBA pro ucts 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
t2,ty,i,1e.vices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's
own ris .
OThe products described in this document are subject to the foreign exchange and foreign trade laws.
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.
OThe information contained herein is subject to change without notice.
2001-02-28 1/15
TOSHIBA
TA8899AF
BLOCK DIAGRAM
2nd IF Input Ist AGC 5V
X'tal DC Feedback VC . Filter
Oscillation FIIterI/ (Logic) AToyteut AFT output Signal Level Ist AGC Slice 5V
I" (Digital) (Analog) Voltage Output 1st AGC Adjustment
Bias (Center .' output
(ia-j/iii:, Monitor _iitsori'i1/"/ji, HH) $8
OSC DAC l l
-l_at l l
IF Amp. : / l y
l A-. I
Control Digital I I
Logic Filter l A I AGC
I vA- l Loop
I.-- _______I Amp.
Counter I Det. Pre. Amp.
_,M_X)Z AGC Det.
Pulse Video Amp. 2009
Clamp VCO
92) 93)
1di0i'
11 12 13 Lei 15
I f" Video Amplifier L - 2nd AGC 2nd AGC
Keyed Level Adjustment GNDI VCO tank VCC Adjustment Filter
Pulse Detect Output Loop Filter (Analog)
2001-02-28 2/15
TOSHIBA
TA8899AF
TERMINAL FUNCTION
PIN NAME
FUNCTION
INTERFACE CIRCUIT
Keyed Pulse Input
It clamps at the pulse peak
and generates the reference
level.
The input impedance is 3kQ.
C) sith-il,
Detect Output
It outputs the detection
output through a low-pass
filter of 30MHz cut off
frequency using an emitter
follower.
Video Amplifier
Level Adjustment
It controls the level
adjustment by varying the
emitter resistor of a
differential amplifier.
If the resistor between pins4
and 5 is reduced the output
will be greater, however, since
the output dynamic range is
narrow the output level
should be used in the range
of lower than Om/p-p.
Loop Filter
The output impedance is
. . 100m
2001-02-28 3/15
TOSHIBA
TA8899AF
PIN PIN NAME
FUNCTION
INTERFACE CIRCUIT
8 GND1
It is the GND of VCO circuit
blocks that are VCO (pins 9,
10, 12), loop filter (pins 6, 7),
video amplifier (pins 4, 5) AFT
system (pins 1, 23, 24, 25, 26,
27, 28) and S/H (pins 29, 30).
VCO tank
It is the VCO using variations
in internal impedance of
diode for control voltage from
mixer.
Use a UJ characteristic for the
capacitor of the external tank
circuit to correct the internal
temperature drift.
3 . VCC
Cl Cl u. I! ,
F-IF-o 'k _ Control Ir
Voltage 0
VCO Tem peratu re
Compensate Bias
The VCO bias is composed of
a synthesis of bias in
proportion to VBE and VT of
transistor, and this terminal
generates a bias proportioned
to the I/BE.
If the external resistor is
reduced, the VCO sensitivity
will rise.
VCO Bias
2nd AGC
3 Adjustment
It changes the input level into
AGC detector. It adjusts by
adding the direct current off-
set to pins 14 and 15. The
variation width of about 8dB
can be added.
Internal bias is 2.5V.
Ce?, SOkQ
2001-02-28 4/15
TOSHIBA
TA8899AF
PIN NAME
FUNCTION
INTERFACE
CIRCUIT
2nd AGC Filter
It generates the AGC voltage
by filtering the 403MHz f
signal by means of an internal
resistor and an external
capacitor. If applying the VCC
to pin 15 and with supplying
2.5V bias to pin 27, the AGC
will be minimum gain and the
VCO oscillates at free-running
frequency.
1st AGC Slice
Adjustment
It sets the input level
threshold for generating the
control signal to lower gain
from the IC to the 2nd
converter of front stage when
excessive signal input. Even if
the 2nd AGC adjustment
varies, the 1st AGC adjustment
point hardly changes.
The internal bias is 2.5V.
1st AGC Filter
It outputs by comparating
with the AGC and 1st AGC
slice level adjustment voltages.
This comparator is constructed
by the active load type high
gain amplifier and determined
its response by a capacitor
connected to this terminal.
1st AGC Control
It outputs the control voltage
using an emitter follower
(active low level). The internal
current sink has only 25pA.
2001-02-28 5/15
TOSHIBA
TA8899AF
PIN NAME
FUNCTION
INTERFACE CIRCUIT
Signal Level
Voltage Output
It outputs the AGC voltage by
doing logarithm --> linear
conversion. In the TA8899AF
the level detection can be
carried out even after the lst
AGC is effective and input is
reduced using the 1st AGC
output.
2nd lF Input
The IF amplifier constructed by
the 3-step series connection of
variable gm type amplifiers, of
which the maximum gain is
47dB and minimum gain
-8dB. In order to prevent a
sneak of radio frequency, all
the circuits are balance-
connected. Therefore, the
differential combination is also
desirable for the IC input. The
internal bias is 2.0V and input
impedance is 1km.
Cig" Cl 500 Cl --fi2)
'i,:',, - iii,', x
75 6'0
AFT Output
(Analog)
This counts the IF frequency,
averages the count data,
carries out D/A conversion of
the signal and outputs an AFT
signal. X'tal is used for the
reference signal of this AFT
operation, so operation is
stabilized against temperature.
Furthermore, an AFT signal is
created from an IF signal, and
so VCO oscillation is an
independent operation.
2001-02-28 6/15
TOSHIBA TA8899AF
my PIN NAME FUNCTION INTERFACE CIRCUIT
These are high detection CH''
when the IF signal is high)
and low detection ("H" when 24
the IF signal is low). These 25
shows both outputs is high
when the input frequency is
nearby 402.78MHz.
24 AFT Output
25 (Digital)
To avoid interference of
26 VCC digital circuits and analog
(Logic Block) circuits connect to the power
line through a 1/1H inductor.
In order to correct the lag
between the VCO's fo and the
input's IF signal, the wave - Vcc
detection output's DC offset is
used and a circuit installed _
. which feeds this back to the 2.2M)
27 DC Feedback Filter VCO oscillation frequency. Cii) N,
The low pass filter for x 1kQ o
detecting this DC offset is
composed of an internal
resistor and an external
capacitor. (fc'=.1Hz)
This terminal monitors the
bias of an internal logic
circuit.
Normally keep it open.
28 Bias Monitor
This is the 4MHz X'tal
oscillation terminal, the
29 X'tal Oscillation reference for internal d.ig.ital
30 operations. When supplying
4MHz OSC from other, please
input to a 29 pin.
2001-02-28 7/15
TOSHIBA
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Power Supply Voltage VCC MAX 6.0 V
Power Dissipation PD MAX 1000 mW
Operation Temperature Topr -20--75 "C
Storage Temperature Tstg - 55--150 "C
Lead Temperature - 260°C, 10s
TA8899AF
Recommended assembly method : Recommended temperature profile of reflow soldering of far and
240 _--------------
Temperature (°C)
medium infrared rays
F-ol L_J time (s)
More than 60s Within 10s
Within 30s
RECOMMENDED POWER SUPPLY VOLTAGE
my PIN NAME MIN. TYP. MAX. UNIT
11 Vcc(Analog) 4.75 5.0 5.25 v
26 Vcc (Logic) 4.75 5.0 5.25 v
2001-02-28 8/15
TOSHIBA TA8899AF
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Unless otherwise specified, Vcc=5.0V, Ta =25°C)
CHARACTERISTIC SYMBOL 153]- TEST CONDITION MIN. TYP. MAX. UNIT
Supply Current ICC 1 - 75 100 125 mA
Pin 1 VI - 2.0 2.5 3.0
Pin 2 V2 - 1.5 2.0 2.5
Pin 3 V3 - 1.5 2.0 2.5
Pin 4 v4 - 0.8 1.3 1.8
Pin 5 V5 - 0.8 1.3 1.8
Pin 6 1/6 - 2.2 2.7 3.2
Pin 7 V7 - 2.2 2.7 3.2
Pin 9 V9 - 2.2 2.7 3.2
Pin 10 v10 - 2.2 2.7 3.2
. Pin 12 V12 1.8kQ-GND 0.08 0.2 0.32
Terminal .
Voltage T 13 v13 1 - 2.3 2.5 2.7 v
Pin 14 V14 - - 3.7 _
Pin 15 V15 - - 3.9 -
Pin 16 v16 - 2.1 2.5 2.9
. V1311 Pin 17 : 1kQ-GND - 1.0 1.3
Pin 18 V18| Pin 17 : Vcc 3.9 4.3 4.7
Pin 20 V20 - 1.5 2.0 2.5
Pin 22 V22 - 1.5 2.0 2.5
Pin 28 V28 - 1.8 2.2 2.6
Pin 29 v29 - 2.3 2.7 3.0
Pin 30 v30 - 2.3 2.7 3.0
Pin 2, 3 Acce table
Output Currepnt la, l3 1 - - 1.0 - 6.0 mA
$253: Output '18 1 - -0.02 - 6.0 mA
2001-02-28 9/15
TOSHIBA TA8899AF
AC CHARACTERISTICS
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
f Input Frequency fin 2 - 350 400 550 MHz
IF Input Level Range Vin 2 - -50 - -10 dBmW
Ist AGC Shoulder Level AGCMAX 2 Pin16=2.5V -33 -26 - 19 dBmW
Ist 59C. Control AAGC 2 - 1.3 2.7 - V/dB
Sensitivity
Signal Level Sensitivity AV/Av 2 - 50 100 150 mV/dB
VCO. P.ryersion i? 2 - 60 80 110 MHz /V
Sensitivity
VCO Temperature Drift nfTa 2 Ta = -10--65oc - i 1.0 i2.5 MHz
PLL Lock Range fL 2 - $20 $30 - MHz
PLL Capture Range fc 2 - $20 LF30 - MHz
. Af=10MHZp.p
[ti,":""""" Output Vout 2 Converting to output rate 0.35 0.50 0.65 Vp-p
Pin 4, 5: 2.4kQ
Video Amplifier Variable . .
Width v0 S/5 2 Pin 4, 5 . short, 5ki2 10 - - dB
2,Tite,tip,r: Output 2 f=0.2~4MH2 +2 dB
mp1 u f .requency vo A1 Reference : 100kHz - - -
Characteristics 1
tCttee',': Output 2 f=4--9MHz +2 dB
mp1 u f Irequency vo A2 Reference : 100kHz - - -
Characteristics 2
Group Delay f=0.2~4MH2 +
Characteristics 1 T pd1 2 Reference: 100kHz - - '10 ns
Group Delay f=4--9MHz +
Characteristics 2 T pd2 2 Reference : 100kHz '40 ns
Keyed AFT Input Range v1 2 - 0.35 0.5 0.65 Vp-p
Keyed AFT Input T1 2 - 8.0 16.7 50 ms
Frequency
AFT Sensitivity Af/AV 2 - 1.5 2.0 2.8 MHz/V
AFT Width of Dead Zone VDEAD 2 - 281 313 344 kHz
Digital AFT Voltage Low
Level VZOL 2 - - 0.2 0.5 V
DG DG 2 APL : 10--90% - $2.0 A3.0 %
DP DP 2 APL : 10--90% - $2.0 A3.0 o
I M 2 IM2 2 2.15MH2 beat level (*) 45 50 - dB
I M 3 IM3 2 1.43MH2 beat level (*) 45 50 - dB
Video S/N SNsat 2 - 51 - - dB
External Input Level .
(4MHz Clock) Xin 2 - 0.3 0.5 0.7 Vp-p
VCO Initial Drift SWON 2 3-20s 0 - 850 kHz
(*) VCO coil must be
adjusted to make Wl2/3 best value
TOSHIBA TA8899AF
MEASUREMENT CONDITION
(Note 1)
(Note 2)
(Note 3)
(Note 4)
(Note 5)
(Note 6)
(Note 7)
(Note 8)
(Note 9)
1st AGC Shoulder Level Range : AGCMAX
F=402.78MHz input level Vin =0 to -40dBmW (500) to pin 20. Measure Vin that pin 18
voltage is lower than 4V by opening pin 16 and raising Vin.
1st AGC Control Sensitivity : AAGC
Input f=402.78MHz Vin =0--40dBmW (500) to pin 20. Calculate Vin that pin 18 voltage is
4V/1V (as vim, Vin2): using the equation below.
AAGC= -3/(vin1-vin2) V/dB
Signal Level Sensitivity : AV/Av
Measure each output voltage of pin 19 at Vin = -40, -60dBmW (500)
AV/AV: (u-tio-u-u/ao mV/dB
VCO Conversion Sensitivity : ,
Input f=402.78MHz and sweep iSMHz, Vin = -30dBmW (500) to pin 20.
Calculate /3=10/(Vdet+5-Vdet-5) and multiply the gain portion (2.66) of video amplifier
when outputting a direct current voltage to pin 3 at 407.78MH2, 397.78MH2 as Vdet+5
and Vdet_5 each.
VCO Temperature Drift : AfTa
Short pin 6 and 7, and connect pin 14 to GND.
Measure the VCO frequency at ambient temperature Ta =25°C, - 10°C +65°C and calculate
how much frequency changes from at 25°C. (read out the VCO leakage output by
spectrum analyzer.)
PLL Lock Range : fL,Capture Range : fca
Measure the range that synchronizes with VCO by putting pin 20 input frequency away
from the free-running frequency.
Demodulation Output Level : Vout
Input pin 20 f=402.78MHz, fm=100kHz, Af=10MHzp-p, Vin = -30dBmW (500)
Open pin4 and 5 and measure the output level of pin 3.
Video Amplifier Variable Width : Vout; Vout5
Input pin 20 f=402.78MHz, fm=100kHz, Af=10MHzp-p, Vin = -30dBmW (500)
Measure the variation of video output by shorting between pin4 and 5 and connecting a
SkQ resistance.
Demodulation Output level Width, Group Delay Characteristics : VoutA, rpd
Input pin 20 f=402.78MHz, fm=100kHz, 60Hz to 4MHz to 9MHz, Af=5MHzp_p,
Vin = - 30dBmW (500)
Compare to the value at 100kHz by opening pin4 and 5, and measuring the output level
and group delay of pin 3.
2001-02-28 11/15
TOSHIBA TA8899AF
(Note 10)
(Note 11)
(Note 12)
(Note 13)
(Note 14)
Keyed Pulse Allowable Period : T1
Input pin 20 f=402.78MHz, fm =100kHz, Af=10MHzp-p, Vin = -30dBmW (500)
Input the signal below to pin1 and open pin 27 and 28.
Signal 3 U Ll ISS/p-p
-ci-u- 17ps 1--100ms
Observe the pin 23 output and change f so as to be 2.5V voltage.
AFT Sensitivity : Af/AV23
Input pin 20 f=402.78MHzi1MHz, Vin: -30dBmW (500)
Adjust f so that pin 23 output will be 2.5V. By moving f up. and down, calculate each
frequency as fH, fL when pin 23 voltage varies 0.5V using the following equation.
Af/AV23 =fH " (MHz/V)
AFT Digital Output Width of dead zone : fDEAD
Input pin 20 f=402.78MHz4c5MHz, Vin: -30dBmW (500)
Measure the input frequency range in which both pin 24 and 25 become high level, by
sweeping f.
pin 24 output waveform
pin 25 output waveform dead zone:
- Frequency sweep
DG, DP
Input pin 20 f=402.78MHzi5MHz, Vin = -30dBmW (500), Af=17MHzp_p, Gray level
video signal (APL .' 10~90%)---Pre-emphasis-on
IMZ, IM3
Input pin 20 f=402.78MHz+-5MHz, Vin = -30tiBmW (500), Af=17MHzp_p, Color
subcarrier (3.579MHz), Sound subcarrier (5.7272MHz) ...
Observe the frequency component outputting to the screen output pin (pin 3) through
the video gate of a video noise meter by spectrum analyzer, and measure the level
difference between 3.579MH2 component and 2.15MH2, 1.43MHz components.
2001-02-28 12/15
TOSHIBA
TEST CIRCUIT 1
DC characteristics
TA8899AF
iifi, iii-ti,, Til Ict,
“Hzégllggéaegéze a,aaJfz';kJi5;aaaei,
TEST CIRCUIT 2
AC characteristics
0.047#F
0.047#F
:V) I :
25 24 23 22 21 20 19 18 17 16
750 0 1:6
2 3 4 5
. E E s,
2001-02-28 13/15
APPLICATION CIRCUIT
(402MHz IF)
AFT AFT
Output Output
T O 1’
o.cupr
37/[170'0
Output
- adoom
ddOOOL
Signal
Leve‘ AGC
Output Output
( ) 29
Digital
Filter
TOSHIBA
Control
Det. Amp‘
‘ ' 05V
Pre.Amp. “- u- +
Logic %' 1 l
Video Amp.
1 2 3 4 5 6 7 8
.. 5109
5 ’ 5m
390523;];
Keyed Pulse Detect Out
free Run when connected VCC-
(Apply 27 pin 2.5V to stop the DC feedback loop)
TA8899AF— 1 4
TA8899AF
TOSHIBA TA8899AF
PACKAGE DIMENSIONS
SSOP30-P-375-1.00 Unit : mm
c'ihvvwinwmi1jil-"-
7 5:0 2
10.7:03
(375mil)
j? H H
EHHHJHHHHHH
15.9MAX J
[ 5ihr-- li
co ts.
—"——_—fir
‘10. x
". " 0.92:t0.2
Weight : 0.63g (Typ.)
2001-02-28 15/15
:
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