HT82V36

16-Bit CCD/CIS Analog Signal Processor

Block Diagram

Rev. 1.30

1

June 29, 2004

Features

(clock timing keep low)

C D S

+

M U X

G I N

P G A

C L A M P

9 B i t s

D A C

1 6 B i t s

A / D

C o n v e r t e r

R E G I S T E R S

B A N D G A P

9

6

1 6

D 0 ~ D 7

S L O A D

S D A T A

S C L K

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.

Applications

Low power flatbed document scanners