HT82V842A Datasheet, PDF (1/18 Pages) Holtek Semiconductor Inc – 10-Bit 20MSPS CCD Analog Signal Processor

HT82V842A
10-Bit 20MSPS CCD Analog Signal Processor
Features
· Operating voltage: 2.7V~3.6V
· Low power consumption: 70mW (Typ.)
· Power down mode: less than 30mW
· Accepts a direct signal input to ADC or PGA at 1.0
V_PP (Typ.)
· CCD signal input level: 1.1 V_P-P (Max.)
· 10-bit ADC (up to 20MHz)
- DNL: ±0.6 LSB (Typ.)
· Black level neutralizer, target setting: 16~127LSB
· Built-in serial interface
· Independent ADC input conversion clock and data
output clock
· Independent CDS and PGA gain control
- CDS: -1.94/0/6/12dB
- PGA: 0~24dB
· Wide gain range: -1.94~36dB
· High speed sample and hold circuit: pulse width 11ns
(Min.)
· 48-pin LQFP package
General Description
The HT82V842A is a CMOS single-chip signal process-
ing device for CCD area sensors. It consists of a clamp
circuit, Correlated Double Sampler (CDS), Programma-
ble Gain Amplifier (PGA), reference voltage generator,
black level detection circuit, 20MHz 10-bit A/D converter
(ADC), timing generator for internally required pulses,
serial interface for internal function control and PGA
gain control.
Block Diagram
O B P A D C L P /C C D C L P
C S SC K SD ATA
M ONOUT
ADCK
B LK
C LP C A P
T im in g
G e n e ra to r
D C C la m p
S e r ia l
R e g is te r
B andG ap
C ir c u it
R E F IN
C C D IN
CCD
A D C LP
A D IN
O BCAP
C C D C LP
CDS
S /H
-1 .9 4 /0 /6 /1 2 d B
PG A
PG A
R o u g h F in e
0~6dB
0 /6 /1 2 /1 8 d B (0 .0 4 7 d B /S te p )
1 0 - B it
ADC
DAC
O BP
C o m p a re
B la c k L e v e l
R e g is te r
VRP
VCO M
VRN
D O 0~D O 9
V DD
V SS
R ESET STBY SH R SH D
O U TC K
Rev. 1.00
1
January 2, 2006