AD7981HRMZ

The AD7981HRMZ is a high-performance 16-bit, 600 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It is designed for precision data acquisition in extreme environments, with an operating temperature range of -55°C to 175°C. The device features a pseudo-differential analog input with an external reference voltage range of 2.4 V to 5.1 V, providing a dynamic range of 92 dB and a signal-to-noise ratio (SNR) of 91 dB at 1 kHz input frequency.

The ADC utilizes a SAR architecture with zero latency, ensuring no pipeline delay. It offers excellent linearity with integral nonlinearity (INL) of ±2.5 LSB maximum and differential nonlinearity (DNL) of ±0.9 LSB maximum. The device supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces, and can be daisy-chained with multiple ADCs. Power dissipation is low at 2.25 mW typical at 600 kSPS (VDD only) and 4.65 mW total, with a low-speed mode consuming only 75 µW at 10 kSPS.

The AD7981HRMZ is housed in a compact 10-lead MSOP package (3 mm × 3 mm) for surface-mount assembly. It requires a single 2.5 V supply (2.375 V to 2.625 V) and a separate logic supply from 1.8 V to 5 V. Typical applications include oil and gas exploration, avionics, heavy industrial, high-temperature environments, and scientific instrumentation.