AD7989-5BRMZ-RL7

Analog to Digital Converters - ADC ADC, Pulsar 18Bit, 500KSPS

Product Details

The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters ADCs that operate from a single power supply, VDD. The AD7989-1/AD7989-5 contain a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The AD7989-1/AD7989-5 are serial peripheral interface SPI- compatible, which features the ability, using the SDI/CS input, to daisy-chain several ADCs on a single 3-wire bus. The AD7989-1/AD7989-5 are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.

**Applications**

.

Battery-powered equipment

.

Data acquisition systems

.

Medical instruments

.

Seismic data acquisition systems

### Features and Benefits

.

Low power dissipation

.

2 mW at 500 kSPS typical VDD only

.

3.5 mW at 500 kSPS typical total

.

18-bit resolution with no missing codes

.

Throughput: 500 kSPS

.

INL: ±1 LSB typical, 2 LSB maximum

.

SNR: 98 dB at 1 kHz, VREF = 5 V typical

.

SINAD: 97 dB at 1 kHz typical

.

THD: −120 dB at 10 kHz typical

.

Dynamic range: 99 dB at VREF = 5 V typical

.

True differential analog input voltage range: ±VREF

.

0 V to VREF with VREF between 2.4 V and 5.1 V

.

No pipeline delay

.

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

.

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

.

Ability to daisy-chain multiple ADCs

.

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