Single voltage-feedback amp with 80 MHz and 35 V/µs — what it buys you
The AD8031ARZ from Analog Devices is a single voltage-feedback operational amplifier that pairs an 80 MHz -3 dB bandwidth with a 35 V/µs slew rate while drawing only 900 µA of supply current. That combination — wide small-signal bandwidth, fast large-signal slew, and sub-milliamp quiescent — makes it a fit for portable instrumentation, active filters, and ADC driver stages where power budgets are tight and the signal path can't afford a slow amplifier. The rail-to-rail output stage lets it swing to within millivolts of the rails, which is essential when running from a 2.7 V to 12 V single supply and you need every bit of dynamic range.
Input offset and bias — what the numbers mean for your circuit
Input offset voltage is 1 mV typical; input bias current is 450 nA. Output current is 15 mA per channel.
Package and temperature grade — the board-level reality
Housed in an 8-SOIC body (3.90 mm width,), the AD8031ARZ is a standard surface-mount footprint that reflows without special handling. The -40°C to 85°C temperature range covers industrial and outdoor telecom enclosures but stops short of the full automotive under-hood band. If your application lives in a heated cabinet or a controlled lab environment, this grade is fine; for engine-bay or downhole use, look at the extended-temperature siblings in the FastFET series.