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参数资料
| 型号： | TA8703S |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PSIP12 |
| 封装： | 1.78 MM PITCH, PLASTIC, SSIP-12 |
| 文件页数： | 8/11页 |
| 文件大小： | 269K |
| 代理商： | TA8703S |
TA8703S
2001-02-07 6/11
TEST CONDITIONS
Note 1: Input sensitivity
Input the following signal (PIF signal) to pins 3 and 4.
Center (carrier wave) frequency fO = 58.75 MHz
Frequency of modulation signal fm = 15.7 kHz
Percentage modulation (AM modulation) = 30%
Signal amplitude (signal level) = 84 dBV
Measure the amplitude (level) of the input signal when the amplitude of output level of the IC (pin 12
output signal) = 0.6 Vp-p.
Note 2: IF AGC range
When pin 7 voltage = 9 V, measure, as V1, the amplitude (level) of the input signal when the amplitude
of the output signal of the IC (pin 12 output signal) = 0.6 Vp-p.
Next, when the pin 7 voltage = 3 V, measure the amplitude (level) of the input signal as V2 with this IC
output signal (pin 12 output signal) = 0.6 Vp-p.
Substitute those values, V1 and V2, in the following expression and determineA.
A = 20 og
l
(V1 / V2)
Note 3: Differential gain, differential phase
Input the following (PIF) signal to pins 3 and 4.
Center (carrier wave) frequency fO = 58.75 MHz
Modulation signal is the ramp waveform signal.
Percentage modulation (AM modulation) = 87.5%
Signal amplitude (signal level) = 84 dBV
Adjust the AGC voltage (pin 7 voltage) externally supplied to this IC so that the amplitude of the sync
signal part of the output signal (pin 12 output signal) of the IC is 2.0 V.
In the above state, measure the differential gain (DG) and differential phase (DP).
Note 4: No-signal output level
When no signals are input to pins 3 and 4 (PIF signal), measure the DC voltage of the output signal of
the IC (pin 12 output signal).
Use a probe with input capacitance of 10 pF (Cin = 10 pF).
Note 5: Sync. tip level
Input the following signal (PIF signal) to pins 3 and 4.
Center (carrier wave) frequency fO = 58.75 MHz
Modulation signal : 100% white video signal
Percentage modulation (AM modulation) = 87.5%
Signal amplitude (signal level) = 84 dBV
In the above state, measure the DC voltage of the sync tip level part of the output signal of the IC (pin
12 output signal).
Note 6: Video output amplitude
Measure the amplitude of the video signal part of the output signal of the IC (pin 12 output signal).
Note 7: White noise inverter level, white noise clamp level
Input the following signals to pins 3 and 4.
Signal obtained by sweeping the frequency between 57 to 65 MHz.
Signal amplitude (signal level) = 84 dBV
In this state, when the voltage on pin 7 is changed, measure the amplitude change of the output signal
of the IC (pin 12 output signal), graph the result as shown below.
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