tda8709a NXP Semiconductors, tda8709a Datasheet - Page 3

• Manufacturer Part Number: tda8709a
• Description: Video Analog Input Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
June 1994
handbook, full pagewidth
Video analog input interface
clamp capacitor
video input 0
video input 1
video input 2
gain control
connection
input
selection bit 0
video input
16
17
18
24
25
SELECTOR
selection
INPUT
14
clamp
level
27
video input
selection bit 1
CLAMP
LOGIC
15
clamp
pulse
AMPLIFIER
26
VIDEO
voltage
analog
output
digital V CCD
Fig.1 Block diagram.
(+ 5 V)
19
6
ADC
input
DIGITAL COMPARATOR
DIGITAL COMPARATOR
20
TDA8709A
CLAMP LEVEL "128"
CLAMP LEVEL "16"
3
AMP.
ground
digital
8
clock
input
analog V CCA
5
8 - bit
ADC
(+ 5 V)
decoupling
input
22
21
analog
ground
OUTPUTS
TTL outputs V
23
TTL
7
10
11
12
13
28
9
1
2
3
4
CCO
MBB951
chip enable
Product specification
fast output
D7
D6
D5
D4
D3
D2
D1
D0
selection
output
format
(+ 5 V)
TDA8709A