GENERAL DESCRIPTION

The AD7988-1/AD7988-5 are 16-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. The AD7988-1 offers a 100 kSPS throughput, and the AD7988-5 offers a 500 kSPS throughput. They are low power, 16-bit sampling ADCs with a versatile serial interface port. On the CNV rising edge, they sample an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD.

FEATURES

Low power dissipation

   AD7988-5: 3.5 mW @ 500 kSPS

   AD7988-1: 700 µW @ 100 kSPS

16-bit resolution with no missing codes

Throughput: 100 kSPS/500 kSPS options

INL: ±0.6 LSB typical, ±1.25 LSB maximum

SINAD: 91.5 dB @ 10 kHz

THD: −114 dB @ 10 kHz

Pseudo differential analog input range

  0 V to VREF with VREF from 2.5 V to 5.5 V

  Any input range and easy to drive with the ADA4841-1

No pipeline delay

Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface

SPI-/QSPI-/MICROWIRE™-/DSP-compatible serial interface

Daisy-chain multiple ADCs

10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP (QFN), same space as SOT-23

Wide operating temperature range: −40°C to +125°C