參數(shù)資料
型號(hào)： TDA8708B
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： Video analog input interface
中文描述： SPECIALTY CONSUMER CIRCUIT, PDSO28
文件頁(yè)數(shù)： 9/24頁(yè)
文件大?。?/td> 190K
代理商： TDA8708B
June 1994
9
Philips Semiconductors
Product specification
Video analog input interface
TDA8708A
Notes
1.
2.
0 dB is obtained at the AGC amplifier when applying V
i(p-p)
= 1.33 V.
The output current at pin 19 should not exceed 1 mA. The load impedance R
L
should be referenced to V
CCA
and
defined as:
a) AC impedance
≥
1 k
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.
Control mode 2 is selected.
3.
4.
Signal-to-noise ratio measured with 5 MHz bandwidth:
V
V
ANOUTY (RMS noise)
5.
The voltage ratio is expressed as:
20 log
V
=
for V
I
= 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.
These measurements are realized on analog signals after a digital-to-analog conversion (TDA8702 is used).
7.
8.
The supply voltage rejection is the relative variation of the analog signal (full-scale signal at input) for 1 V of supply
variation:
V
–
–
+
CCA
9.
Full-scale sine wave (f
i
= 4.4 MHz; f
clk
= 27 MHz).
S
N
---
20 log
------------------------------------------------at B = 5 MHz.
=
SVRR1
V
CCA
-----------------
G
--G
×
SVRR2
V
(
)
V
I 00
V
I FF
(
)
--------------------------------------------V
=
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