參數(shù)資料
型號(hào)： TDA8708AT-T
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO28
文件頁(yè)數(shù)： 24/24頁(yè)
文件大小： 124K
代理商： TDA8708AT-T
June 1994
9
Philips Semiconductors
Product specication
Video analog input interface
TDA8708A
Notes
1. 0 dB is obtained at the AGC amplifier when applying Vi(p-p) = 1.33 V.
2. The output current at pin 19 should not exceed 1 mA. The load impedance RL should be referenced to VCCA and
defined as:
a) AC impedance
≥1k and the DC impedance >2.7 k.
b) The load impedance should be coupled directly to the output of the amplifier so that the DC voltage supplied by
the clamp is not disturbed.
3. Control mode 2 is selected.
4. Signal-to-noise ratio measured with 5 MHz bandwidth:
5. The voltage ratio is expressed as:
for VI = 1 V (p-p), gain at 100 kHz = 1 and 1 V supply variation.
6. It is recommended that the rise and fall times of the clock are
≥2 ns. In addition, a ‘good layout’ for the digital and
analog grounds is recommended.
7. These measurements are realized on analog signals after a digital-to-analog conversion (TDA8702 is used).
8. The supply voltage rejection is the relative variation of the analog signal (full-scale signal at input) for 1 V of supply
variation:
9. Full-scale sine wave (fi = 4.4 MHz; fclk = 27 MHz).
S
N
----
20 log
V
ANOUTC p
p
–
()
V
ANOUTY (RMS noise)
-------------------------------------------------at B = 5 MHz.
=
SVRR1
20 log
V
CCA
V
CCA
------------------
G
--------
×
=
SVRR2
V
I00
()
V
IFF
()
–
()
V
I00
()
V
IFF
()
–
()
+
V
CCA
-----------------------------------------------------------------------------------------------------
=
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TDA8708B 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Video analog input interface
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