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HT82V36 Datasheet

  • HT82V36

  • 16-Bit CCD/CIS Analog Signal Processor

  • 10頁

  • HOLTEK

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HT82V36
16-Bit CCD/CIS Analog Signal Processor
Features
路
Operating voltage: 3.3V
路
Low power consumption at 56mW
路
Power-down mode: Under 1mA
路
鹵200mV
programmable offset
路
Input clamp circuitry
路
Internal voltage reference
路
Multiplexed byte-wide output (8+8 format)
路
Programmable 3-wire serial interface
路
3.3V digital I/O compatibility
路
28-pin SSOP (209mil) package
(clock timing keep low)
路
16-bit 6 MSPS A/D converter
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Guaranteed no missing codes
路
Supports CDS/SHA mode
路
1~6 programmable gain
Applications
Low power flatbed document scanners
General Description
The HT82V36 is a complete analog signal processor for
CCD imaging applications. It features a 1-channel archi-
tecture designed to sample and condition the outputs of
linear CCD arrays. It consists of an input clamp, Corre-
lated Double Sampler (CDS), offset DAC and Program-
mable Gain Amplifier (PGA), and a low power 16-bit A/D
converter.
The CDS amplifiers may be disabled for use with sen-
sors such as Contact Image Sensors (CIS) and CMOS
active pixel sensors, which do not require CDS.
The 16-bit digital output is multiplexed into an 8-bit out-
put word that is accessed using two read cycles. The in-
ternal registers are programmed through a 3-wire serial
interface, which provides gain, offset and operating
mode adjustments.
Block Diagram
B A N D G A P
1 6 B its
A /D
C o n v e rte r
1 6
G IN
C D S
+
9 B its
D A C
9
P G A
M U X
D 0 ~ D 7
C L A M P
6
R E G IS T E R S
S L O A D
S D A T A
S C L K
Rev. 1.30
1
June 29, 2004

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