Exar Corporation XRD98L59AIG

Description
The XRD98L59 is a low-power CCD Image Digitizer designed for digital, motion, and still cameras. It includes a differential Correlated Double Sampler (CDS), 8-bit digitally Programmable Gain Amplifier (PGA), 10-bit Analog-to-Digital Converter (ADC), and improved digitally controlled black level auto-calibration circuitry with pixel averager, hot pixel clipper, and DNS filter.
The CDS subtracts the CCD output signal black level from the video level, rejecting common mode signal and power supply noise. The PGA has a digitally controlled gain range of 6dB to 38dB with 0.125dB per LSB of the gain code. The auto-calibration circuit compensates for internal offset and black level offset from the CCD.
The XRD98L59 is controlled through a simple 3-wire serial interface. It has direct access to the ADC input for digitizing other analog signals. The device is packaged in a 28-lead surface mount TSSOP for space and weight reduction, making it suitable for hand-held and portable applications.

Features
10-bit Resolution ADC
20MHz Sampling Rate
Programmable Gain: 6dB to 38dB PGA (2x to 80x)
Improved Digitally Controlled Offset-Calibration with Pixel Averager and Hot Pixel Clipper
DNS Filter Removes Black Level Digital Noise
Widest Black Level Calibration Range at Maximum Gain
Manual Control of Offset DAC via Serial Port for Use with High Speed Scanners
2ns/step Programmable Aperture Delay on SPIX and SBLK
Single 2.7V to 3.6V Power Supply
Low Power for Battery Operation: 120mW @ VD=3V
5μA Typical Stand By Mode Current
Three-State Digital Outputs
2,000V ESD Protection
28-pin TSSOP Package

Applications
Digital Still Cameras
Digital Camcorders
PC Video Cameras
CCTV/Security Cameras
Industrial/Medical Cameras
2D Bar Code Readers
High Speed Scanners
Digital Copiers