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quad op amp for audio | Microchip
https://www.microchip.com/forums/m397020.aspx
quad op amp for audio I am working on a design that uses a PIC to process audio (really speech, < 5Khz). I need op-amps that are rail-to-rail and low power since this is a battery operated device. The op amp will be used for a microphone preamp and level shifter to get 0-5V for the PIC adc and also for output filtering of a pwm audio output.
LM837 data sheet, product information and support | …
https://www.ti.com/product/LM837
The LM837 is a quad operational amplifier designed for low noise, high speed and wide bandwidth performance. It has a new type of output stage which can drive a 600Ω load, making it ideal for almost all digital audio, graphic equalizer, …
LM148/LM248/LM348 Quad 741 Op Amps datasheet …
https://www.ti.com/lit/ds/symlink/lm148-n.pdf
The LM148 series are quad low power 741 op amps. In the proliferation of quad op amps, these are the first to offer the convenience of familiar, easy to use operating characteristics of the 741 op amp. In those applications where 741 op amps have been employed, the LM148 series op amps can be employed directly with no change in circuit performance.
LM324 - Single Supply Quad Operational Amplifiers
https://www.onsemi.com/pdf/datasheet/lm324-d.pdf
The LM324 series are low−cost, quad operational amplifiers with true differential inputs. They have several distinct advantages over standard operational amplifier types in single supply applications. The quad amplifier can operate at supply voltages as low as 3.0 V or as high as 32 V with quiescent currents about one−fifth of those
OP470 Very Low Noise Quad Operational Amplifier …
https://www.analog.com/media/en/technical-documentation/data-sheets/OP470.pdf
The OP470 is a high-performance monolithic quad operational amplifier with exceptionally low voltage noise, 5 nV/÷Hz at 1 kHz max, offering comparable performance to ADI’s industry standard OP27. The OP470 features an input offset voltage below 0.4 mV, excellent for a quad op amp, and an offset drift under 2 mV/∞C,
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