GENERAL DESCRIPTION

The XRD9836 is a precision 16-bit analog front-end (AFE) for use in 3-channel/1-channel CCD/CIS document imaging applications. Pixel-by-pixel gain and offset for each of the 3 channels are controlled using a time multiplexed parallel input. Offset and Gain are sequentially supplied for red, green, and blue. The outputs from each of the three channels are transmitted time multiplexed with the high order byte first followed by the low order byte for red, blue and green.

FEATURES

• 16-bit resolution ADC, 30MHz Sampling Rate

• 10-bit accurate linear programmable gain range selectable as either 2-to-20 V/V or 1-to-10 V/V per channel

• Fully-differential input pins and internal path

• Sampling rates from 1.0 MSPS to 10.0 MSPS per channel for 3 -Channel mode and up to 15.0 MSPS in single channel mode.

• Pixel-by-Pixel Offset and Gain control through a parallel interface running at a maximum 60 Mbyte/sec. data rate

• A microprocessor serial port to control various modes of operation

• Fixed Gain/Offset Mode (FGOM) or Pixel by Pixel Gain/ Offset Mode (PPGOM)

• Alternate Pixel Offset Adjust Mode (APOAM)

• Low Power CMOS=280mW (typ. @ 3V); Power-Down Mode=1mW (typ. @ 3V with static clocks)

• Single Power Supply (3.0 to 3.6 Volts) with Max CCD input signal of 1V and reset pulse up to 0.5V

• High ESD Protection: 2000 Volts Minimum

APPLICATIONS

• Scanners, MFP’s