GENERAL DESCRIPTION

The AD7983 is a 16-bit, successive approximation, analog-to-digital 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 independent of the supply voltage, VDD. Its power scales linearly with throughput.

FEATURES

High performance

Pseudo differential analog input range

0 V to VREF with VREF between 2.9 V to 5 V

Throughput: 1.33 MSPS

Zero latency architecture

16-bit resolution with no missing codes

INL: ±0.6 LSB typical, ±1.0 LSB maximum

Dynamic range: 93 dB, VREF = 5 V

SNR: 92 dB at fIN = 1 kHz, VREF = 5 V

THD: −115 dB at fIN = 1 kHz, VREF = 5 V

SINAD: 92 dB at fIN = 1 kHz, VREF = 5 V

Low power dissipation

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

logic interface

5.25 mW at 1.33 MSPS (VDD only)

10.5 mW at 1.33 MSPS (total)

80 μW at 10 kSPS

Proprietary serial interface

SPI-/QSPI™-/MICROWIRE™-/DSP-compatible1

Daisy-chain multiple ADCs and busy indicator

10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP

Wide operating temperature range: −40°C to +85°C

APPLICATIONS

Automated test equipment

Data acquisition systems

Medical instruments

Machine automation