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GENERAL DESCRIPTION

The AD7938-6 is a 12-bit high speed,low power,successive approximation (SAR) ADC.The partoperates froma single 2.7 V to5.25 V power supplyand features throughputrates up to 625 kSPS.The partcontains a low noise, wide bandwidth, differentialtrack-and-hold amplifierthatcan handle input frequencies upto 50 MHz.

FEATURES

Fast throughput rate:625kSPS

Specified for VDDof 2.7 V to 5.25 V

Low power

3.6 mW maxat 625 kSPSwith 3 V supplies

7.5 mW maxat 625 kSPSwith 5 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