AD7989-1

PRODUCTION

18-Bit, 100 kSPS PulSAR ADCs in MSOP/LFCSP

Analog Devices AD7989-1 Product Info

10 February 2026 5

Features

High performance
- True differential analog input voltage range: ±V_REF
  - 0 V to V_REF with V_REF between 2.4 V and 5.1 V
- Throughput: 500 kSPS/100 kSPS options
  - Zero latency architecture
- 18-bit resolution with no missing codes
- INL: ±1 LSB typical, ±2 LSB maximum
- Dynamic range: 99 dB at V_REF = 5 V
- SNR: 98 dB at f_IN = 1 kHz, V_REF = 5 V
- THD: −119 dB at f_IN = 1 kHz, V_REF = 5 V
- SINAD: 97 dB at f_IN = 1 kHz, V_REF = 5 V

Low power dissipation
- Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface
- 400 μW at 100 kSPS (VDD only)
  700 μW at 100 kSPS (total)
- 70 μW at 10 kSPS
Proprietary serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
10-lead MSOP and 3 mm × 3 mm 10-Lead LFCSP
Wide operating temperature range: −40°C to +85°C

Part details & applications

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 V_REF. The reference voltage, V_REF, 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

Automated test equipment
Data acquisition systems
Medical instruments
Machine automation

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