OPA1602AIDR

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The OPA1602AIDR is a type of high performance but low power monolithic operational amplifier (op amp) featuring integrated voltage noise cancelling, buffering and linear amplifying capabilities. It is ideal for applications where high accuracy and low noise are critical, such as precision data acquisition and instrumentation systems, medical instruments and scientific instrumentation. It can also be used in audio and other high performance applications, such as differential audio preamps, transmitters and receivers. This article provides an overview of the OPA1602AIDR application fields and working principle.

Application Fields

The OPA1602AIDR is a highly accurate beat-regulation monolithic op amp in the OPA family of products. It is designed specifically to provide high accuracy and low noise performance in datarequisition and instrumentation systems, medical instruments, and scientific instrumentation, while concurrently providing high common mode rejection and low power consumption. Its integrated signal-noise-coupling integrator provides a buffered signal output, eliminating all common-mode noise. This feature, combined with its integrated linear amplifier, makes it highly suitable for precision data acquisition and measuring systems.

The OPA1602AIDR also can be used in a wide variety of audio applications, such as differential audio preamps, transmitters and receivers. It features a high slew rate of up to 10V/µs and low input offset voltage of <2mV, making it well-suited for high performance audio applications where high accuracy and low noise are of the utmost importance. Additionally, its low power consumption of only 4.8mA, and its low operating voltage of ±2.61 – 5.5V make it an optimal choice for portable audio devices.

Working Principle

The OPA1602AIDR is a high-precision monolithic operational amplifier featuring integrated voltage noise cancellation and buffering capabilities. It is constructed using precision laser-trimmed polysilicon thin-film resistors, low-noise bipolar transistors and integrated polysilicon gate arrays. The OPA1602AIDR uses a unique input stage structure consisting of an internally compensated common-source voltage follower for excellent noise performance. This allows for a wide input common-mode voltage range of ±2.61 – 5.5V, with a high common-mode rejection ratio of >80dB from DC up to 60MHz. Additionally, the buffer stage uses an internally-compensated cascode configuration for ultra-low noise performance.

The OPA1602AIDR features a low offset voltage of <2mV and low offset drift over time. It can provide up to a high impedance voltage-level output, with a typical output offset voltage of <0.3mV and a low noise output of <1µVrms. Its slew rate is also up to 10V/µs, making it well-suited for high performance audio applications where fast frequency response and low distortion are required.

The OPA1602AIDR also features an integrated linear amplifier, making it ideal for precision data acquisition and measuring systems. Its low distortion and low noise performance make it highly suitable for other applications such as digital-to-analog conversion and voltage sensors, as well as for driving capacitive loads, such as speakers and drivers. Overall, the OPA1602AIDR provides a high level of performance for applications where accuracy and low noise are critical.

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