BUY NE1101B https://www.utsource.net/itm/p/9483375.html

Description: Low-Voltage, Low-Power CMOS Operational Amplifier Features: Low Supply Voltage: 2.7 V to 5.5 V Low Supply Current: 0.7 mA Typ Low Input Offset Voltage: 0.5 mV Typ Low Input Bias Current: 0.1 nA Typ Low Input Voltage Noise: 0.8 nV/√Hz Typ High Open-Loop Gain: 100 dB Typ High Slew Rate: 0.5 V/μs Typ High Common-Mode Rejection Ratio: 90 dB Typ High Output Current: 20 mA Typ High Output Voltage Swing: ±1.2 V Typ Applications: Battery-Powered Systems Portable Instruments Audio Pre-Amplifiers Active Filters Signal Conditioning Data Acquisition Systems (For reference only)