TDA8708A Datasheet, PDF (3/24 Pages) NXP Semiconductors – Video analog input interface

Philips Semiconductors
Video analog input interface
BLOCK DIAGRAM
Product specification
TDA8708A
andbook, full pagewidth
video input video input
selection bit 0 selection bit 1
analog
voltage ADC
output input
clock decoupling
input input
TTL outputs VCCO (+ 5 V)
14
15
video input 0
video input 1
video input 2
clamp capacitor
connection
AGC capacitor
connection
16
17 INPUT
18 ^SELECTOR
24
25
VIDEO
19 20
AMPLIFIER
AMP.
5
21
8 - bit
ADC
TDA8708A
peak level current 28
resistor input
AGC &
CLAMP
LOGIC
&
MODE
SELECTION
PEAK LEVEL
DIGITAL COMPARATOR
BLACK LEVEL
DIGITAL COMPARATOR
SYNC LEVEL
DIGITAL COMPARATOR
7
9
1
2
3
TTL
4
OUTPUTS
10
11
12
13
output format/
chip enable
(3-state input)
D7
D6
D5
D4
D3
D2
D1
D0
27
26
6
8
22
23
sync level black level digital VCCD digital
sync pulse sync pulse _{(+ 5 V)}
ground
analog VCCA analog
(+ 5 V)
ground
MBB965
Fig.1 Block diagram.
June 1994
3