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.
The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.
The AD7983 is housed in a 10-lead MSOP or a 10-lead QFN1 (LFCSP) with operation specified from −40°C to +85°C.
1QFN package in development. Contact sales for samples and availability.
**Applications**
Battery-powered equipment
Communications
ATE
Data acquisitions
Medical instruments
### Features and Benefits
16-bit resolution with no missing codes
Throughput: 1.33 MSPS
Low power dissipation: 10.5 mW typical @ 1.33 MSPS
INL: ±0.6 LSB typical, ±1.25 LSB maximum
Pseudo differential analog input range
0 V to VREF with VREF between
2.9 V to 5.5 V
Any input range and easy to drive with the ADA4841
SINAD: 91.6 dB @ 10 kHz
THD: −115 dB @ 10 kHz
No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible