AD9923
ObsoleteCCD Signal Processor with V-Driver and Precision Timing™ Generator
Overview
- Integrated 15-channel V-driver
- 12-bit 36 MHz analog-to-digital converter (ADC)
- 5-field, 10-phase vertical clock support
- Complete on-chip timing generator
- Precision Timing core with <600 ps resolution
- Correlated double sampler (CDS)
- 6 dB to 42 dB 10-bit variable gain amplifier (VGA)
- Black level clamp with variable level control
- On-chip 3 V horizontal and RG drivers (2 and 4-phase H-clock modes)
- Electronic and mechanical shutter support
- On-chip driver for external crystal
- On-chip sync generator with external sync input
The AD9923 is a complete 36 MHz front end solution for digital still cameras and other CCD imaging applications. Similar to the AD9994 product, the AD9923 includes the analog front end and a fully programmable timing generator combined with a 15-channel vertical driver (V-driver). A Precision Timing core allows adjustment of high speed clocks with approximately 600 ps resolution at 36 MHz operation.
The on-chip V-driver supports up to 15 channels for use with 5-field, 10-phase CCDs.
The analog front end includes black level clamping, CDS, VGA, and a 12-bit ADC. The timing generator and V-driver provide all the necessary CCD clocks: RG, H-clocks, vertical clocks, sensor gate pulses, substrate clock, and substrate bias control. The internal registers are programmed using a 3-wire serial interface.
Packaged in an 8 mm × 8 mm CSPBGA, the AD9923 is specified over an operating temperature range of −25°C to +85°C.
Applications