HT82V36_08 Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 16-Bit CCD/CIS Analog Signal Processor

HT82V36
16-Bit CCD/CIS Analog Signal Processor
Features
· Operating voltage: 3.3V
· Low power consumption at 56mW
· Power-down mode: Under 1mA
(clock timing keep low)
· 16-bit 6 MSPS A/D converter
· Guaranteed no missing codes
· Supports CDS/SHA mode
· 1~6 programmable gain
Applications
Low power flatbed document scanners
· ±200mV programmable offset
· Input clamp circuitry
· Internal voltage reference
· Multiplexed byte-wide output (8+8 format)
· Programmable 3-wire serial interface
· 3.3V digital I/O compatibility
· 28-pin SSOP (209mil) package
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
BANDG AP
1 6 B its 1 6
G IN
CDS
+
PG A
A /D
M UX
D 0~D 7
C o n v e rte r
C LA M P
9 B its
DAC
9
6
R E G IS T E R S
S LO A D
SD ATA
S C LK
Rev. 1.40
1
November 10, 2008