OPA1611AIDR Integrated Circuits (ICs)

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OPA1611AIDR Application Field and Working Principle

The OPA1611AIDR linear amplifier is part of Texas Instruments’ broad portfolio of high-performance audio amplifiers, capable of driving with unparalleled quality and accuracy. This high-precision instrumentation amplifier is perfectly suited to demanding precision audio applications and features excellent power supply rejection ratio and output current drive. The OPA1611AIDR is capable of being used in headphone amplifiers, signal conditioners and power amplifiers, and is a neat solution for users looking for a device to enhance their audio systems.

Specifications

The OPA1611AIDR is a dual-channel amplifier with a maximum output current of 2.5A, a power supply rejection ratio of 80 dB, a single-ended output range of -2.5V to +20V, and a dynamic range of 85 dB. It features low noise at 4.5nv/sq Hz, low distortion of only 0.0004%, low cross-talk of -90dB, and a wide bandwidth of 550 kHz. It is equipped with temperature-stable precision input for accurate temperature monitoring and it supports a wide temperature operating range of -40°C to +85°C.

Working Principle

The OPA1611AIDR linear amplifier is a two-component, two-stage amplifier which uses two identical amplifiers connected in a differential circuit to minimize noise and dc offset, while providing a large amount of gain. The OPA1611AIDR is configured as an "instrumentation amplifier", which uses a precision amplifier design to achieve very high accuracy performance. The input signal is amplified by the first amplifier stage, and then inverted and amplified by the second stage. This differential chaining technique, combined with the precision amplifier design of the OPA1611AID, allows it to have excellent noise performance, accuracy, power supply rejection ratio and speed. The gain is set by a single external resistor, and the output of the amplifier can be adjusted with an external resistor divider.

Applications

The OPA1611AIDR is capable of driving a wide range of audio amplifiers, from low-power headphone amplifiers to high-power power amplifiers. It is also suitable for audio signal conditioning, such as pre-amplification and cross-over filtering. Its low noise and high accuracy make it especially well-suited for improving the sound quality of audio systems. The OPA1611AIDR is capable of driving up to 2.5Amps of output current, making it an ideal choice for driving high-power power amplifiers, in combination with a high-power output stage.

Conclusion

The OPA1611AIDR linear amplifier is a high-performance amplifier, suited to precision audio and signal conditioning applications. Its excellent noise, power supply rejection ratio and accuracy make it the ideal choice for driving audio amplifiers and improving the sound quality of systems. Its high current capability makes it suitable for power amplifier applications as well, and its single and differential input configurations provide ample flexibility to be used in a wide range of configurable audio systems.

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