GENERAL DESCRIPTION
The AD7938/AD7939 are 12-bit and 10-bit,high speed,low power,successive approximation (SAR) ADCs. The parts operate from a single 2.7 V to5.25 V power supply and feature throughput rates up to1.5 MSPS.The parts contain a low noise, wideband width,differential track-and-hold amplifier that can handle input frequencies up to50 MHz.

FEATURES
Fast throughput rate:1.5 MSPS
Specified for VDDof 2.7 V to 5.25 V
Low power
  6 mW max at 1.5 MSPS with 3 V supplies
  13.5 mWmax at1.5 MSPS with5 V supplies
8 analog input channels with a sequencer
Software configurable analoginputs
  8-channel single-ended inputs
  4-channel fully differential inputs
  4-channel pseudo-differential inputs
  7-channel pseudo-differential inputs
Accurate on-chip 2.5 V reference
±0.2% max@ 25°C, 25 ppm/°C max
70 dB SINAD at50 kHz input frequency
Nopipeline delays
High speed parallel interface—word/byte modes
Full shutdown mode: 2 µA max
32-leadLFCSP and TQFP package