With sample rates up to 600-kSPS, the AD7981 PulSAR A/D converter is ideally suited for applications including wide bandwidth sonic and vibration measurement as well as low power, lower-bandwidth pressure and temperature sensing.

The AD7981 maximizes battery life in harsh environments by scaling power linearly with the sample rate, using only 4.65 mW at a full speed of 600 kSPS and 70 µW at 10 kSPS. The A/D converter features typical performance of +/-0.7-LSB INL and 91-dB SNR enabling a high dynamic range with better accuracy and precision.

This combination addresses critical performance criteria for precision measurement applications in harsh, high-temperature environments such as down-hole oil and gas drilling, as well as industrial and avionics applications.

Features:

－ Extreme high temperature operation Specified temperature range: −55°C to +175°C

－ 16-bit resolution with no missing codes

－ 600 kSPS throughput with no latency/pipeline delay

－ SNR: 91dB typical @ 1 kHz input frequency

－ THD: −100dB typical @ 1 kHz input frequency

－ INL: ±2.0 LSB max, DNL: ±0.9 LSB max

－ 2.25mW typical at 600 kSPS (VDD only)

－ 4.65 mW typical at 600kSPS (total)

－ 70 µW typical at 10 kSPS

－ 10-lead 3 mm × 5 mm mono-metallic wire bonding MSOP

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