LMP8481MMEVM-S

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The LMP8481MMEVM-S is an evaluation module and designed for Texas Instruments (TI) LMP8481 Single-Channel, Low-Noise, Low-Power, Rail-to-Rail Output Operational Amplifier. It is a single-channel amplifier primarily engineered for audio applications. The amplifier features guaranteed operation from -40C to 85C in the small 3x3 mm SOT-23 package. The IC on the EVM is a zero-offset, rail-to-rail output device, designed for use with a wide range of input dc voltage levels, allowing for greater dynamic range than traditional non-rail-to-rail operational amplifier.

The EVM includes the LMP8481 single-channel amplifier and and equivalent circuit to simplify the understanding of op amp performance. The package includes two LMV841 low-power, low-input BIPOLAR comparators and two LMV324 quad low-power, rail-to-rail single supply CMOS operational amplifiers for prototyping applications. The EVM also includes two external power supplies for the BIPOLAR comparators. The LMP8481MMEVM-S operates from a +2.7V to +5.5V single supply voltage range.

The EVM contains a wealth of external components to showcase the LMP8481 performance. Two different input configurations were selected to demonstrate the difference between single-ended and differential amplifiers, including resistors and capacitors for filtering. The EVM is designed to drive 8-Ω or higher load into a speaker. The EVM also contains a low-pass filter to reduce noise and distortion, an amplifier to drive a speaker, and other circuitry to reduce noise.

The LMP8481MMEVM-S offers exceptionally low noise performance, consuming less than 1.13 single-supply µA over a wide frequency range up to 200 kHz, with low distortion. It has a -40 dBc distortion-free output ∆V/∆t over a ±1 V supply range thanks to its extremely low 0.0024 differential input offset voltage. This helps to reduce the complexity of the speaker output amplification stage.

The main application of the LMP8481MMEVM-S is audio applications such as active speaker systems. The module provides high quality audio performance due to its low noise and low distortion characteristics. Additionally, the module can be used in systems with low power requirements, since it only consumes 1.13 single-supply µA. The EVM also helps designers to build single-ended and differential amplifier systems, and can be used in a range of applications such as video equipment, CCTV systems and industrial equipment.

In summary, the LMP8481MMEVM-S is a versatile evaluation module that can be used to build audio systems with good quality performance. The module contains many external components for prototyping and minimal external power supplies, and can be used in a variety of applications such as audio processing, video equipment, CCTV systems and industrial equipment. Its low power consumption makes it attractive for low power applications, and its rail-to-rail output allows for greater dynamic range, contributing to better audio quality. The LMP8481MMEVM-S is an efficient and reliable module for audio systems.

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