Dual op-amp drawing 4.2 µA per channel — the battery-life spec
The MIC863YM8-TR is a dual general-purpose op-amp from Microchip. Each channel draws 4.2 µA typical.
450 kHz GBWP and 0.35 V/µs slew rate — bandwidth budget
Gain-bandwidth product is 450 kHz, and the -3 dB bandwidth extends to 800 kHz. The 0.35 V/µs slew rate sets the large-signal response: expect about 1.4 µs to swing 1 V at the output. This is a low-frequency signal conditioning part — think thermocouple amplifiers, photodiode transimpedance stages below 100 kHz, or active filters in the audio band. It will not drive a high-speed ADC input or a fast PWM loop; the MCP6272 with 2 MHz GBWP is a better fit there if you need more bandwidth.
Input offset and bias — sensor interface fit
Input offset voltage is 100 µV maximum, and input bias current is 10 pA typical. For a general-purpose CMOS op-amp these numbers are clean enough for most precision sensor interfaces — a bridge amplifier or a thermistor front-end will not see significant DC error from the amplifier itself. The 27 mA output current per channel can drive a reference input or a modest load, but not a speaker or relay coil.
SOT-23-8 dual in a small footprint
Both the package and the supplier device package are SOT-23-8.
Industrial temperature grade, active lifecycle
It does not extend to the 125°C junction temperature needed for under-hood automotive or downhole tools — the MCP6H02T-E/SN and MCP6L72T-E/SN are rated to 125°C if that is the requirement.