GENERAL DESCRIPTION
The AD7980 is a 16-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to 5.5V.

   16-bit resolution with no missing codes
   Throughput: 1MSPS
   Low Power dissipation: 7.5 mW @ 1MSPS, 75 μW @ 10kSPS
   INL: ±1 LSB typ, ±2 LSB max
   S/(N + D): 91.5 dB @ 20 kHz
   THD: −101 dB @ 20 kHz
   Pseudo-differential analog input range
      0 V to VREF with VREF between 2.5V to 5.5V
      Any input range and easy to drive with the ADA4841
   No pipeline delay
   Single-supply 2.5V operation with 1.8 V/2.5 V/3 V/5 V logic
   interface
   Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
   Daisy-chain multiple ADCs and BUSY indicator
   10-lead package: MSOP (MSOP-8 size) and
      QFN (LFCSP), 3 mm × 3 mm same space as SOT-23

APPLICATIONS
   Battery-powered equipment
   Communications
   ATE
   Data acquisitions
   Medical instruments