12-Bit CCD Signal Processor with ™ Generator

The AD9992 is a highly integrated CCD signal processor for digital still camera applications. It includes a complete analog front end with analog to digital conversion combined with a full-function programmable timing generator. The timing generator is capable of supporting up to 24 vertical clock signals to control advanced CCDs. A Precision Timing™ core allows adjustment of high speed clocks with approximately 400 ps resolution at 40 MHz operation. The AD9992 also contains eight general-purpose inputs/outputs that can be used for shutter and system functions.

The AD9992 is specified at pixel rates of up to 40 MHz. The analog front end includes black level clamping, CDS, VGA, and a 12-bit analog-to-digital converter (ADC). The timing generator provides all the necessary CCD clocks: RG, H-clocks, V-clocks, sensor gate pulses, substrate clock, and substrate bias control. Operation is programmed using a 3-wire serial interface.

The AD9992 is specified over an operating temperature range of −25°C to +85°C.

Applications

* Digital still cameras

* 1.8 V AFETG core

* Internal LDO regulator and charge pump circuitry

* Compatibility with 3 V or 1.8 V systems

* 24 programmable vertical clock outputs

* Correlated double sampler (CDS) with −3 dB, 0 dB, +3 dB, and +6 dB gain

* 6 dB to 42 dB, 10-bit variable gain amplifier (VGA)

* 12-bit, 40 MHz ADC