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參數(shù)資料
| 型號(hào)： | TDA4454 |
| 英文描述： | Multistandard VIF Amplifier and PLL Demodulator |
| 中文描述： | 多標(biāo)準(zhǔn)資料表格放大器和鎖相環(huán)解調(diào)器 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 150K |
| 代理商： | TDA4454 |
TELEFUNKEN Semiconductors
TDA4454
Preliminary Information
Rev. A1: 04.05.1995
5 (11)
Unit
Max.
Typ.
Min.
Symbol
Test Conditions / Pins
Parameters
ááááááááááááááááááááááááááááá
á
ááááááááá
á
ááááááááááááááááááááááááááá
between black and white
á
ááááááááá
á
áááááááááááááááááááááááááááááááá
áááááááááááááááááááááááááááááááá
Control voltage B/G
Note 6
ááááááááááááááááááááááááááááá
f = 38.9 MHz
Upsetting factor of sync
pulse in the AGC range
á
ááááááá
ááááááá
á
Below sync level
V
sw1
V
sw2
V
sw3
á
V
res1
res2
Vsync
áá
áá
á
V
lim1
áá
2.5
0
5.0
á
áá
áá
áá
áá
á
2
áá
áá
áá
áá
4.0
1.5
V
s
á
áá
áá
áá
250
áá
V
V
V
á
mV
áá
áá
áá
áá
á
Ultra black limiting
Ultra white limiting
threshold
á
á
á
á
á
á
á
á
á
á
á
á
ááááááááááááááááááááááááááááá
áá
mV
Control voltage L
á
á
Above ultra white level
á
á
á
á
á
ááááááááááááááááááááááááááááá
Notes
1.
A peak white value for at least 10
μ
s must be
transmitted for each complete frame
Loop filter: R1 = 500 – 1 k, C1 = 0.47
μ
F
Capacitor VCO circuit: C
VCO
= 27 – 47 pF
Pin 6 unloaded
2.
3.
4.
Residual carrier: 10% carrier amplitude
5.
Blanking level: 30% carrier amplitude
6.
Without control voltage at Pin 10 – standard B/G is
automatically selected
Alignment of the VCO
1.
Apply 4.5 V to Pin 5, to disable the broadband
amplifier.
2.
Measure the dc-voltage at Pin 11 (phase detector).
3.
Apply a 38.9 MHz unmodulated carrier signal to the
IF input (Pins 1–16); adjust the input level so that the
AGC voltage at Pin 5 is between 2.0 V and 2.5 V.
4.
Adjust the VCO circuit until at Pin 11 is the same
dc-voltage as measured in step 2.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA4455 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Multistandard VIF Amplifier and PLL Demodulator |
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