OPA1642AID

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The OPA1642AID is a fully differential operational amplifier (op amp) designed to be a replacement for single-ended DA chips or instrumentation amplifiers used in low-noise applications. With a gain of 0.003 to 8 V/V, the OPA1642AID is designed to provide excellent distortion, noise and phase performance. Furthermore, it features an adjustable current-feedback bandwidth, giving it exceptional frequency response throughout the audio band.

Application Field

The OPA1642AID is used in any precision AC or DC application that requires low noise, high accuracy and low frequency response. It is typically used in audio processing and amplification, data acquisition, low-level signal conditioning, preamplification, transimpedance amplifier and automotive systems. Additionally, the amplifier provides wide power supply range options for general-purpose and industrial applications.

Working Principle

The OPA1642AID is a low noise, differential amplifier operating on the principle of negative feedback. The amplifier features an internal gain setting resistor and a variable input impedance, allowing the differential pair to be accurately matched. This improves the speed and accuracy of the amplifier, while keeping noise and distortion levels low. The amplifier also features a wide bandwidth, achieved by using a proprietary current-feedback architecture. The amplifier operates over a range of ±2.5V to ±18V.

When connected to a suitable power supply, the amplifier makes a differential input signal available at the output. This output can be easily routed either directly to the next stage, or to a gain control device such as a volume control, enabling precise manipulation of the audio signal.

The OPA1642AID is a low noise and low distortion device, able to provide an accurate representation of audio signals in demanding applications. The amplifier is an excellent choice for applications that require a budget-friendly performance and low risk of interfering with audio signals.