HT82V14

HT82V14 14-Bit CCD/CIS Analog Signal Processor Features · · · · · · · Low power CMOS : 350 mW 9 ADC clock latency for digital data output 14-bit 6 MSPS A/D converter 3-channel correlated double sampler 1~6 programmable gain Input clamp circuitry for CDS-mode Internal/external circuitfor CIS · · · · · · · Internal/external voltage reference Internal MUX for channel operation 1 or 3-channel operation Pixel-rate or line-rate switch operation Programmable 3-wire serial interface +5V digital I/O compatibility 28-pin SOP/SOJ package General Description The HT82V14 is a complete analog signal processor for CCD imaging applications. It features a 3-channel architecture designed to sample and condition the outputs of the 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 14-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 14-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. Block Diagram O F F S E T R E F T C M L R E F O E V o lta g e R e fe r e n c e R IN G IN B IN C L P C L P C L P C D S + + + 3 ´ 8 b its D A C O ffs e t C D S C D S V G A V G ...