ADA4622-1BRZ-RL

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The ADA4622-1BRZ-RL is a precision, low noise, differential-input amplifier designed to meet the needs of industry-standard instrumentation. This single-channel amplifier is ideal for precision, low-power instrumentation applications since its low voltage offset, low noise and high input impedance provide the characteristics needed to address challenging voltage and current measurement problems.

The ADA4622-1BRZ-RL is designed to operate from a single supply. It can be used to buffer and amplify standard signals from thermocouples, strain gauges and other transducers. The Single-ended, unbalanced input stage is tailored to eliminate ground loop problems encountered in many industrial applications. The differential output provides a low output impedance for best noise performance. The amplifier’s low voltage offset, low noise and high input impedance allow for precise, low-noise measurements for a variety of sensor signals.

The ADA4622-1BRZ-RL is available in a surface mount SOIC-8 package, which reduces the amount of board-footprint area and allows the amplifier to be placed close to sensing sites. The device is specified over a wide temperature range of -40°C to +105°C and offers rail-to-rail operation. Furthermore, the amplifier provides a wide bandwidth of 1.5MHz and a low input bias current of 1pA (max).

The working principle of the ADA4622-1BRZ-RL is comprised of two main stages. The first stage is an input buffer amplifier, which has a differential gain of approximately unity, providing a very high input impedance (over 1MΩ). The second stage is an output buffer amplifier, which allows the amplifier to provide a low output impedance and support a wide load range.

The ADA4622-1BRZ-RL is ideal for low power instrumentation applications, such as bridge measurements, input buffer/amplifiers, linearisation modules and thermocouple sensors. It also offers excellent precision, coupled with a low-noise performance. The device provides a useful tool to take accurate measurements in a wide range of dynamic environments.

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