Instrumentation front-end with 1 pA input bias
The Maxim MAX4461HETT+T is a single-supply instrumentation amplifier in a 6-TDFN exposed-pad package. Its 1 pA typical input bias current and 100 µV input offset make it a natural fit for high-impedance sensor interfaces — think piezoelectric transducers, photodiode preamps, or medical electrodes — where a standard op-amp's bias current would swamp the signal. The rail-to-rail output lets it swing to the supply rails in single-supply systems from 2.85 V to 5.25 V.
2.5 MHz GBP with a 25 kHz -3 dB bandwidth — what that means
The gain-bandwidth product of 2.5 MHz combined with a -3 dB bandwidth of 25 kHz tells you this part is optimised for precision at moderate speed. At a gain of 100, the closed-loop bandwidth drops to roughly 25 kHz — enough for audio-frequency instrumentation, strain-gauge conditioning, or thermocouple amplification. The 0.25 V/µs slew rate limits large-signal response, so don't plan on driving fast step inputs at high gain; the part is built for accuracy, not slew.