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PDF TA8876FA Data sheet ( Hoja de datos )
| Número de pieza | TA8876FA | |
| Descripción | FOR LCD TVS / PIF / QIF / AND SIF SYSTEMS | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TA8876FA (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT
SILICON MONOLITHIC
TA8876FA
FOR LCD TVS, PIF, QIF, AND SIF SYSTEMS
TA8876FA
FEATURES
PIF circuit
· High-speed response peak AGC with dual time constant
· Forward / Reverse RF AGC output
· Output with black noise inverter
· Output without black noise inverter
· Video output adjustment
· Single polarity AFT output
· Built-in sync. separation circuit
QIF circuit
· Intercarrier demodulation block with same structure as in
PIF circuit
Weight: 0.63g (Typ.)
· Independent mean value AGC detection
SIF circuit
· Sound IF amplification and detection
· Quadrature-type detection circuit
· Use of a ceramic discriminator device makes the SIF circuit adjustment-free.
· Sound mute switch
1 2001-05-10
1 page  
PIN No.
PIN NAME
FUNCTION
10
QIF Input
11
QIF signal input terminal.
Input impedance is 5 kΩ (typ.).
TA8876FA
INTERFACE CIRCUIT
12 QIF AGC
AGC terminal of QIF detector circuit.
13 FM Detection
Input
Sound detection terminal for coil,
which is connected between this
terminal and pin 14.
15 Sound Output FM detector circuit output terminal.
Sound detection terminal for coil,
which is connected between this
terminal and pin 13.
14 Limiter Output Applying ceramic discriminator sets
this circuit to non-adjustable circuit.
To mute sound, connect pin 13 to
GND.
5 2001-05-10
5 Page 
TA8876FA
TEST CONDITIONS
< PIF circuit >
Note 1: Input sensitivity
PIF input : f = 58.75 MHz, fm = 15.75 kHz, 30% AM, 84 dBµV. Gradually reduce the input level. Measure the
input level when the detection output at video output-2 will be −3 dB.
Note 2: Maximum input level
PIF input : f = 58.75 MHz, fm = 15.75 kHz, 30% AM, 84 dBµV.
Gradually raise the input level. Measure the input level when the detection output at video output-2 is at the
noise inverter threshold.
Note 3: No-signal level
PIF input : No input. 2nd AGC terminal : GND
Measure DC voltage at video output-2.
Note 4: Sync. Tip level
PIF input : f = 58.75 MHz, standard television signal (V / S = 10 : 4 ramp waveform), 87.5% AM,
84 dBµV.
Measure sync. Tip DC voltage at video output-2.
Note 5 Video output amplitude
PIF input : f = 58.75 MHz, standard television signal (V / S = 10 : 4 ramp waveform), 87.5% AM,
84 dBµV.
Measure amplitude level at video output-2.
Note 6: Video S / N ratio
PIF input : f = 58.75 MHz, fm = 15.75 kHz, 30% AM, 84 dBµV.
Using the RMS voltmeter, measure the detection output at video output-2.
Then, using the RMS voltmeter, measure the video detection output without modulation.
S
/
N
=
20log
é
ê
ë
Value with modulation (mVrms )
Value without modulation (mVrms
ù
)
ú
û
´
6
[dB]
11 2001-05-10
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet TA8876FA.PDF ] | |
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