Chopper-stabilized precision for DC sensor front-ends
The OPA2317ID is a dual-channel zero-drift amplifier — the chopper architecture continuously nulls the input offset voltage, holding it to 20 µV typical across temperature and time. With a 300 kHz gain-bandwidth product and a 0.15 V/µs slew rate, it is suited for low-frequency precision loops: thermocouple amplifiers, strain-gauge bridges, and current-shunt monitors where the DC accuracy dominates the error budget. Each channel draws 21 µA supply current — 42 µA for both amplifiers — and the 275 pA input bias current at 25 °C stays manageable for source impedances up to a few hundred kΩ before the bias-current error rivals the offset.
The -40°C to 150°C operating range covers the full automotive temperature grade (Grade 0 equivalent) and industrial extended-temperature zones, making it viable for engine-bay or downhole sensor interfaces where the ambient exceeds 125°C. Supplied in a tube — verify that the pick-and-place feeder can handle tube orientation; if the line is set up for tape-and-reel, a manual tube-to-tape transfer may be needed.