ADC12281 Datasheet | National Semiconductor

Description The ADC12281 is a monolithic CMOS analog-to-digital converter capable of converting analog input signals into 12-bit digital words at 20 megasamples per second (MSPS). It utilizes a pipeline architecture to minimize die size and power dissipation. Self-calibration and error correction maintain accuracy and performance over temperature. The ADC12281 operates on a 5V power supply and can digitize single-ended analog input signals in the range of 0V to 2V. A single convert clock controls the conversion operation and all digital I/O is TTL patible. The ADC12881 is designed to minimize external ponents necessary for the analog input interface. An internal sample-and-hold circuit samples the single-ended analog input and an internal amplifier buffers the reference voltage input. The Power Down feature reduces power consumption to 20 m W, typical. The ADC12281 is available in the 32-lead TQFP package and is designed to operate over the industrial temperature range of - 40˚C to +85˚C. Features n n n n n Single 5V power supply Single-ended analog input Internal sample-and-hold Internal reference buffer amplifier Low offset and gain errors Key Specifications n n n n n n n n Resolution Conversion rate DNL SNR ENOB Analog input range Supply voltage Power consumption, 20 MHz 12 bits up to 20 MSPS 0.35 LSB (typ) 65.5 d B (typ) 10.5 bits (typ) 2 VPP (min) +5V ± 5% 443 m W (typ) Applications n n n n n n Digital signal processing front end Digital television Radar High speed data links Waveform digitizers Quadrature demodulation Connection Diagram DS101027-1 32-Lead TQFP Package Order Number ADC12281CIVT See NS Package Number VBE32A TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation DS101027 .national. Ordering Information Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC12281CIVT Package 32-Pin TQFP Simplified Block Diagram DS101027-2 Pin Descriptions and Equivalent Circuits Pin Symbol Equivalent...