AD9802

a FEATURES 10-Bit, 18 MSPS A/D Converter 18 MSPS Full Speed Correlated Double Sampler (CDS) Low Noise, Wideband PGA Internal Voltage Reference No Missing Codes Guaranteed +3 V Single Supply Operation Low Power CMOS: 185 mW 48-Terminal TQFP Package PBLK PIN DIN ADCIN CCD Signal Processor For Electronic Cameras AD9802 FUNCTIONAL BLOCK DIAGRAM CLPDM PGACONT1 PGACONT2 SHP SHD ADCCLK TIMING GENERATOR PGA 10 MUX S/H A/D DOUT DRVDD CLAMP CDS CLAMP REFERENCE AD9802 DVDD CMLEVEL VRT VRB STBY CLPOB ADCMODE ACVDD ADVDD PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD9802 is a complete CCD signal processor developed for electronic cameras. It is suitable for both camcorder and consumer-level still camera applications. The signal processing chain is comprised of a high speed CDS, variable gain PGA and 10-bit ADC. Required clamping circuitry and an onboard voltage reference are provided as well as a direct ADC input. The AD9802 operates from a single +3 V supply with a typical power consumption of 185 mW. The AD9802 is packaged in a space saving 48-terminal thin quad flatpack (TQFP) and is specified over an operating temperature range of 0°C to +70°C. 1. On-Chip Input Clamp and CDS Clamp circuitry and high speed correlated double sampler allow for simple ac-coupling to interface a CCD sensor at full 18 MSPS conversion rate. 2. On-Chip PGA The AD9802 includes a low-noise, wideband amplifier with analog variable gain from 0 dB to 31.5 dB (linear in dB). 3. Direct ADC Input A direct in...