Intersil offers ISL70617SEH radiation-tolerant precision amplifier

The ISL70617SEH radiation-tolerant instrumentation amplifier features a differential A/D converter driver. The high-performance differential input, rail-to-rail output amplifier provides the highest performance for low-level sensor telemetry data critical to communication satellites. It can operate over a supply range of 8 (±4) to 36 V (±18) and features a differential input voltage range up to ±30 V. The amplifier's output stage is powered by separate supplies. 

Input offset voltage is a low 30 µV typical; input bias current is 2 nA maximum, 0.2 nA typical; and CMRR is 110 dB minimum, 120 dB typical. The 24-lead ceramic flatpack packaged device has a 6-kV HBM ESD rating. The device is wafer-by-wafer guaranteed to 75 krad (Si) with a low dose rate exposure of 10 mrad/sec, which more closely resembles the space environment than the high dose rate testing used with some other devices.

Closed loop −3 dB bandwidth is 0.3 MHz (A_V = 1k) to 5.5MHz (A_V = 0.1) and operating temperature range is −55°C to 125°C. Designers can easily program the IC's gain from 0.1 to 10,000 using two external resistors. The gain accuracy is determined by the matching of RIN and RFB. The gain resistors have Kelvin sensing, which removes gain error due to PC trace resistance.

The ISL70617SEH offers similar features but implements rail-to-rail single-ended output. Both versions are available now. An evaluation board is also available.