Zero-drift op-amp in a SOT-23-5 — 25 µV offset, 21 µA supply
The Microchip MCP6V36T-E/OT is a single-channel zero-drift operational amplifier in a 5-pin SOT-23-5 package (SC-74A).
A 25 µV input offset lets the MCP6V36T resolve microvolt-level signals without external nulling. For a thermocouple or shunt-resistor current-sense application, that offset contributes less than 0.1% error at a 25 mV full-scale input. The zero-drift topology also keeps the offset stable over temperature and time — no warm-up drift or 1/f noise buildup at low frequencies. The 5 pA input bias current further preserves accuracy when driving high-impedance sensors like pH probes or photodiodes.
21 µA supply current — battery-life impact
Quiescent current of 21 µA makes this op-amp a fit for always-on sense blocks in battery-powered equipment. In a 3.7 V Li-ion system, the amplifier alone draws about 78 µW — negligible against a microcontroller's sleep-mode budget. The 300 kHz gain-bandwidth is enough for low-frequency loops (temperature, pressure, current monitoring) but not for audio or fast ADC drivers. If you need 10 MHz bandwidth, the MCP6V91UT-E/OT offers 9.5 V/µs slew rate at 1.1 mA supply — a different power/speed trade-off.
For dual-sourcing, the MCP6V16UT-E/LTY shares the same zero-drift architecture, 5 pA bias, and 25 µV offset, but its gain-bandwidth is 80 kHz — a slower, lower-power sibling in a different package. Qualify the alternate now if your BOM requires a second source for supply resilience.