AD9801

a FEATURES 10-Bit, 18 MSPS A/D Converter 18 MSPS Full-Speed CDS Low Noise, Wideband PGA Internal Voltage Reference No Missing Codes Guaranteed +3 V Single Supply Operation Low Power CMOS: 185 mW 48-Pin TQFP Package PBLK 19 CCD Signal Processor For Electronic Cameras AD9801 FUNCTIONAL BLOCK DIAGRAM CLPDM 23 PGACONT1 PGACONT2 29 30 SHP SHD ADCCLK 21 22 16 CLAMP PIN 27 CDS DIN 26 CLAMP REFERENCE 37 48 47 18 20 33 TIMING GENERATOR PGA S/H A/D 10 2 DOUT 11 AD9801 43 17 12 DRVDD CMLEVEL VRT VRB STBY CLPOB ACVDD ADVDD DVDD PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD9801 is a complete CCD signal processor developed for electronic cameras. It is well suited for both video conferencing 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 also provided. The AD9801 operates from a single +3 V supply with a typical power consumption of 185 mW. The AD9801 is packaged in a space saving 48-pin 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 AD9801 includes a low noise, wideband amplifier with analog variable gain from 0 dB to 31.5 dB (linear in dB). 3. 10-Bit, High Speed A/D Convert...