AD7984

PRODUCTION

18-Bit, 1.33 MSPS PulSAR 10.5 mW ADC in MSOP/QFN

Analog Devices AD7984 Product Info

10 February 2026 7

Features

High performance
Throughput: 1.33 MSPS
- True differential analog input range: ±V_REF
  - 0 V to V_REF with V_REF between 2.9 V to 5 V
  - Easy to drive with the ADA4941
- Throughput: 1.33 MSPS
  - Zero latency architecture
- 18-bit resolution with no missing codes
- INL: ±2.25 LSB maximum
- Dynamic range: 99.7 dB, V_REF = 5 V
- SNR: 98.5 dB at f_IN = 1 kHz, V_REF = 5 V
- THD: −110.5 dB at f_IN = 1 kHz, V_REF = 5 V
- SINAD: 97.5 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/5 V logic interface
- 5.3 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 compatible
Ability to 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

Part details & applications

The AD7984 is an 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7984 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and V_REF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD.

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, and 5 V logic, using the separate VIO supply.

The AD7984 is 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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