HT82V38

HT82V38 16-Bit CCD/CIS Analog Signal Processor Features · Operating voltage: 3.3V (typ.) · Low Power CMOS: 300 mW (typ.) · Power-Down Mode: 10mA (max.) · 16-Bit 30 MSPS A/D converter · Guaranteed won¢t miss codes · 1~5.85x programmable gain · Correlated double sampling · ±250 mV 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 · 3-Channel operation up to 30 MSPS · 2-Channel (even-odd) operation up to 30 MSPS · 1-Channel operation up to 20 MSPS · 28-pin SSOP (209mil) package Applications · Flatbed document scanners · Film scanners · Digital color copiers · Multifunction peripherals General Description The HT82V38 is a complete analog signal processor for CCD imaging applications. It features a 3 channel architecture designed to sample and condition the outputs of trilinear color CCD arrays. Each channel consists of an input clamp, Correlated Double Sampler (CDS), offset DAC and Programmable Gain Amplifier (PGA), multiplexed to 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, and provide adjustment of the gain, offset, and...