TLC5733 Datasheet, PDF (17/23 Pages) Texas Instruments – 20 MSPS 3-CHANNEL ANALOG-TO-DIGITAL CONVERTER

TLC5733A
20 MSPS 3ĆCHANNEL ANALOGĆTOĆDIGITAL CONVERTER
WITH HIGHĆPRECISION CLAMP
SLAS104B − JULY 1995 − REVISED FEBRUARY 2001
APPLICATION INFORMATION
Feed Back Clamp Block of HSYNC
Vref (Top)
C2
0.22 µF
Video Signal Input
AIN
(Composite or Component)
Vref (Bottom)
_
+
R1
16 kΩ _Output
C1
2200 pF
CLK
A/D
P
Q
Magnitude
Comparator
Digital
Feedback
Clamp Gate
Preset Data
FEEDBACK CLAMP AND CHARGE PUMP ACTIVITY
INPUT DATA
CONDITIONS
OUTPUT
CHARGE PUMP
CONDITIONS
P<Q
Active
H
Charge
P=Q
Hold
Z
Hold
P>Q
Active
L
Discharge
Figure 6. Feedback Clamp Circuit
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