GENERAL DESCRIPTION

The AD79801 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

16-bit resolution with no missing codes

Throughput: 1 MSPS

Low power dissipation

4 mW at 1 MSPS (VDD only)

7 mW at 1 MSPS (total)

70 µW at 10 kSPS

INL: ±0.6 LSB typical, ±1.25 LSB maximum

SINAD: 91.25 dB at 10 kHz

THD: −110 dB at 10 kHz

Pseudo differential analog input range

0 V to VREF with VREF between 2.5 V to 5 V

No pipeline delay

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

logic interface

Proprietary serial interface

SPI/QSPI/MICROWIRE™/DSP compatible

Daisy-chain multiple ADCs and busy indicator

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

same space as SOT-23

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

APPLICATIONS

Battery-powered equipment

Communications

Automatic test equipment (ATE)

Data acquisitions

Medical instruments