AD9805JS

Overview

The AD9805JS is a 10-bit, 6 MSPS CCD/CIS signal processor in a 64-pin PQFP package. It integrates three-channel correlated double sampling (CDS), programmable gain amplifiers (PGA) with 1x to 4x analog gain, and pixel-rate digital offset/gain correction. The device features a 10-bit ADC with guaranteed no missing codes, an internal 2V bandgap reference, and operates on +5V supplies within a 0°C to +70°C temperature range.

Feature Summary

• Integrated triple-channel correlated double sampler for low-frequency noise reduction
• On-chip analog programmable gain amplifier with 16-step adjustment
• Pixel-rate digital gain and offset correction blocks for imaging error compensation
• +3.3 V/+5 V logic level compatible microprocessor interface

Applications

• CCD imaging front-end decoders
• Contact image sensor (CIS) signal processing
• Scanner systems requiring single-chip analog-to-digital conversion

Procurement Notes

Verify the specific suffix JS indicates the Plastic Quad Flatpack (PQFP) S-64 package option and commercial temperature range. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD precautions are observed during handling due to device sensitivity.

Selection Notes

Select the AD9805JS over the AD9807 when 10-bit resolution is sufficient for the application, as both parts are pin-compatible. Consider the integrated CDS functionality if direct AC coupling from the sensor is required. Verify that the 6 MSPS conversion rate meets the system timing requirements for the target imaging sensor.

Part Context

The AD9805JS belongs to the AD9807/AD9805 family of complete CCD/CIS imaging decoders. It serves as the 10-bit resolution variant of the AD9807, offering pin compatibility to simplify design upgrades across different scanner models while maintaining identical functional block architecture and interface protocols.

Replacement Considerations

The AD9807JS is a pin-compatible alternative offering 12-bit resolution instead of 10-bit. No other direct substitutes are documented in the provided datasheet.