'Signal Processor' related articles 1

  1. 2009/08/14 HT82V26A - 16-Bit CCD/CIS Analog Signal Processor
General Description
The HT82V26A is a complete analog signal processor for CCD imaging applications. It features a 3-channel architecture designed to sample and condition the outputs of tri-linear color CCD arrays. Each channel consists of an input clamp, Correlated Double Sampler CDS), offset DAC and Programmable Gain Amplifier PGA), and a high performance 16-bit A/D converter.
The CDS amplifiers may be disabled for use with sensors 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 output word that is accessed using two read cycles. The internal registers are programmed through a 3-wire serial interface, which provides gain, offset and operating mode adjustments.
The HT82V26A operates from a single 5V power supply, typically consumes 400mW of power.

Features
*Operating voltage: 5V (Typ.)
*Low power consumption at 400mW (Typ.)
*Power-down mode: Under 2mA (Typ.)
*16-bit 30 MSPS A/D converter
*Guaranteed wont miss codes
*1~6 programmable gain
*Correlated Double Sampling
*±250mV programmable offset
*Input clamp circuitry
*Internal voltage reference
*Multiplexed byte-wide output (8+8 format)
*Programmable 3-wire serial interface
*3V/5V digital I/O compatibility
*3-channel operation up to 30 MSPS
*2-channel (Even-Odd) operation up to 30 MSPS
*1-channel operation up to 25 MSPS
*28-pin SSOP/SOP package (lead-free on request)

Applications
*Flatbed document scanners
*Film scanners
*Digital color copiers
*Multifunction peripherals

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