AD7641

FEATURES Throughput 2 MSPS (wideband warp and warp mode) 1.5 MSPS (normal mode) INL: ±2 LSB typical, ±3 LSB max; ±8 ppm of full scale 18-bit resolution with no missing codes Dynamic range: 95.5 dB SNR: 93.5 dB typical @ 20 kHz (VREF = 2.5 V) THD: −112 dB typical @ 20 kHz (VREF = 2.5 V) 2.048 V internal reference: typ drift 10 ppm/°C; TEMP output Differential input range: ±VREF (VREF up to 2.5 V) No pipeline delay (SAR architecture) Parallel (18-, 16-, or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface SPI®/QSPI™/MICROWIRE™/DSP compatible Single 2.5 V supply operation Power dissipation 75 mW typical @ 2 MSPS with internal REF 2 µW in power-down mode Pb-free, 48-lead LQFP and 48-lead LFCSP Speed upgrade of the AD7674, AD7678, AD7679 APPLICATIONS Medical instruments High speed data acquisition/high dynamic data acquisition Digital signal processing Spectrum analysis Instrumentation Communications ATE GENERAL DESCRIPTION The AD7641 is an 18-bit, 2 MSPS, charge redistribution SAR, fully differential, analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. The part contains a high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. It features two very high sampling rate modes (wideband warp and warp) and a fast mode (normal) for asynchronous rate applications. The AD7641 is hardware factory calibrated and tested to ensure ac parameters...