BUY S14K275 https://www.utsource.net/itm/p/11532485.html

The S14K275 is a dual-channel, low-power, low-voltage, low-noise operational amplifier from ON Semiconductor. It is designed for use in audio, instrumentation, and other low-noise applications. Features: * Low-noise: 4.5 nV/√Hz * Low-power: 5.5 mA/channel * Low-voltage: 2.7 V to 5.5 V * High-speed: 1.3 MHz * High-input impedance: 100 MΩ Applications: * Audio amplifiers * Instrumentation amplifiers * Low-noise amplifiers * Active filters * Signal conditioning (For reference only)