●GENERAL DESCRIPTION
●The AD9990 is a highly integrated CCD signal processor for digital still camera applications. It includes a complete analog front end with analog-to-digital conversion and a full-function, programmable timing generator for a 2-channel output CCD. Each channel is specified up to 32 MHz. 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 ~488 ps resolution at 32 MHz operation. The AD9990 also contains eight general-purpose outputs that can be used for shutter and system functions.
●Each analog front end includes black level clamping, a CDS, a VGA, and a 14-bit ADC. The timing generator provides all the necessary CCD clocks: RG, H-clocks, V-clocks, sensor gate pulses, substrate clock, and substrate bias control.
●The AD9990 is specified over an operating temperature range of −25°C to +85°C.
●FEATURES
● 1.8 V AFETG core
● Internal LDO regulators
● 24 programmable vertical clock signals
● 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)
● 14-bit, 32 MHz analog-to-digital converter (ADC)
● Black level clamp with variable level control
● Complete on-chip timing generator
● Precision Timing core with ~488 ps resolution
● On-chip 3 V horizontal and RG drivers
● General-purpose outputs (GPOs) for shutter and system support
● On-chip driver for external crystal
● On-chip sync generator with external sync input
● 112-ball CSP_BGA package, 8 mm × 8 mm, 0.65 mm pitch
●APPLICATIONS
● Digital still cameras
