What this dual op-amp does in your signal chain
The MCP6402-E/SN is a dual general-purpose operational amplifier from Microchip, designed for low-power signal conditioning where rail-to-rail output swing and a 1 MHz gain bandwidth product are sufficient to close the loop on sensor or ADC driver stages. Each channel draws 45 µA of supply current, making it a fit for battery-operated or loop-powered applications where the power budget is tight.
Parametric fit for your BOM
With a 1 MHz gain bandwidth product and 0.5 V/µs slew rate, this op-amp handles audio-band filtering and slow sensor signals but will not close a loop cleanly above a few hundred kilohertz — budget the bandwidth before committing the BOM position. Input bias current is 1 pA typical, which keeps DC errors low when the source impedance is high, such as photodiode or pH probe interfaces. Output current capability is 15 mA per channel, enough to drive a reference input or a small analog meter, but not a heavy load like a relay coil.
Housed in an 8-SOIC package (0.154-inch body width, 3.90 mm), the part is a surface-mount drop-in for standard SOIC-8 land patterns.