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PDF TA1272AF Data sheet ( Hoja de datos )
| Número de pieza | TA1272AF | |
| Descripción | FOR LCD TVS / PIF AND SIF SYSTEM | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TA1272AF
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA1272AF
FOR LCD TVS, PIF AND SIF SYSTEM
FEATURES
PIF circuit
· High input sensitivity
· 3-stage variable-gain PIF amplifier
· Output with black noise inverter
· Output without black noise inverter
· High-speed response peak AGC with dual time constant
· Reverse RF AGC output
· Built-in AFT detection circuit with AFT mute
SIF circuit
· 4-stage SIF amplifier
· Quadrature-type detection circuit
RF AGC CURVE
Weight: 0.32g (Typ.)
000707EBA1
· TOSHIBA 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..
· The 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.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The 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.
· The information contained herein is subject to change without notice.
2001-02-28 1/17
1 page  
PIN
No.
PIN NAME
15 FM Det. Input
FUNCTION
Quadrature input terminal for FM
detection circuit.
Connect FM coil between this terminal
and pin 16.
Audio output is muted when this
terminal is connected to GND.
17 Audio Output
Audio signal output terminal.
16
Limiter
Output
Limiter output terminal.
Connect FM coil between this terminal
and pin 15.
18
22
Sync. Sepa.
Sync. sepa. output and input terminal.
19 Video Coil 1
20 Video Coil 2
Connect video detection coil.
TA1272AF
INTERFACE
2001-02-28 5/17
5 Page 
TA1272AF
Note 10:
Note 11:
Output voltage at no signal
PIF input : no input IF AGC : GND
Measure output video signal DC voltage.
Black noise inverter level / Black noise clamp level
PIF input : fo = 58.75 MHz, fm = 15.75 kHz, 78%AM, 84 dBµV
Supply 0V to IF AGC from external source. Raise that voltage gradually, measure black noise
inverter level.
<SIF circuit>
Note 12: Output signal voltage
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure output audio signal voltage.
Note 13: SIF input signal voltage sensitivity
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure output audio signal voltage (that voltage is 0 dB). Lower input SIF signal voltage gradually,
measure input SIF signal voltage when output audio signal voltage is −3 dB.
Note 14: Total harmonic distortion
SIF input : fo = 4.5 MHz, fm = 400 Hz, 7.5 kHz / devi, 84 dBµV
Note 15: AM Rejection
SIF input :
(1) FM : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
(2) AM : fo = 4.5 MHz, fm = 400 Hz, 30%AM, 84 dBµV
Measure difference of output audio signal voltage between (1) and (2).
Note 16: Signal-noise ratio
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure audio signal output voltage. : V1 [mVrms]
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure audio signal output voltage. : V2 [mVrms]
Signal-noise ratio is calculated by following equality.
Signal-noise ratio = 20 ℓog (V1 / V2) [dB]
Note 17: −3 dB bandwidth
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure audio signal output voltage. (that voltage is 0 dB) Then change input signal frequency,
measure bandwidth that audio signal output voltage within −3 dB.
Note 18: Dependence of output signal voltage on power supply voltage
SIF input : fo = 4.5 MHz, fm = 400 Hz, 25 kHz / devi, 84 dBµV
Measure the audio signal output voltage when power supply voltage are 3.5 V and 5.5 V. (4.5 ± 1.0 V)
Compare those voltage and audio signal output voltage when power supply voltage is 4.5 V.
2001-02-28 11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TA1272AF.PDF ] | |
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