General Description

The HT82V842A is a CMOS single-chip signal processing device for CCD area sensors. It consists of a clamp circuit, Correlated Double Sampler (CDS), Programmable Gain Amplifier (PGA), reference voltage generator, black level detection circuit, 20MHz 10-bit A/D converter (ADC), timing generator for internally required pulses, serial interface for internal function control and PGA gain control.

Features

• Operating voltage: 2.7V~3.6V

• Low power consumption: 70mW (Typ.)

• Power down mode: less than 30W

• Accepts a direct signal input to ADC or PGA at 1.0 VPP (Typ.)

• CCD signal input level: 1.1 VP-P (Max.)

• 10-bit ADC (up to 20MHz)

- DNL: ±0.6 LSB (Typ.)

• Black level neutralizer, target setting: 16~127LSB

• Built-in serial interface

• Independent ADC input conversion clock and data output clock

• Independent CDS and PGA gain control

- CDS: -1.94/0/6/12dB

- PGA: 0~24dB

• Wide gain range: -1.94~36dB

• High speed sample and hold circuit: pulse width 11ns (Min.)

• 48-pin LQFP package