BUY TL072 https://www.utsource.net/itm/p/1205411.html
LOW-NOISE JFET-INPUT OPERATIONAL AMPLIFIERS
Description: The TL072 is a low-noise JFET-input operational amplifier with an internally trimmed input offset voltage (BI-FET II technology). Features: * Low noise: 4.5nV/√Hz * Low input bias current: 20nA * Low input offset voltage: 0.8mV * High slew rate: 13V/μs * High common-mode rejection ratio: 80dB * Low power consumption: 0.8mA/amplifier Applications: * Audio preamplifiers * Active filters * Signal conditioning * Instrumentation amplifiers * Sample-and-hold circuits * Switched capacitor circuits * Voltage-to-frequency and frequency-to-voltage converters (For reference only)