SI8920AD-ISR

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Linear amplifiers are a type of electrical amplifier, the output of which is an amplified version of the input signal that has the same shape and characteristics. Instrumentation amplifiers (IAs) are specialized types of linear amplifiers, specifically designed for applications involving instrumentation. The SI8920AD-ISR is an instrumentation amplifier (IA) from Silicon Laboratories that offers high performance and industry-standard functionality.

The SI8920AD-ISR is a low power, rail-to-rail instrumentation amplifier (IA) with differential inputs and a single supply operation. It is designed to operate over an extended temperature range of -40 ⁰C to +105⁰C, making it ideal for use in harsh environments. With its adjustable gain, the SI8920AD-ISR can be used in a variety of applications, ranging from medical and automotive to industrial and consumer markets.

The device is well suited for applications such as; medical diagnostic and monitoring, strain gauge measurements, motion detection systems and thermocouples. Other applications include; audio measurement, motor speed measurement and control, motor current measurement, pressure transducers and accelerometers. The SI8920AD-ISR can also be used for high-voltage sensing and isolation.

The SI8920AD-ISR is a rail to rail input IA, capable of amplifying signals as low as 10μVRMS or 140μVP-P. It features a gain accuracy of up to 0.06% and a CMRR of up to 95dB, allowing for low distortion and precise measurement. In addition, the SI8920AD-ISR has a low noise floor of 0.6μVRMS (10Hz to 10kHz) and a low total harmonic distortion of -92dB.

In terms of operational capabilities, the IA offers adjustable gains of up to 1,456, with a typical power consumption of 0.5mA. Its high-voltage rail-to-rail inputs and outputs are designed to handle input signals of up to ±7.5V. The device also offers a wide gain error bandwidth and can operate over a wide range of supply voltages, making it suitable for low power systems.

The SI8920AD-ISR is a fully-differential one stage amplifier, the key components of which are two sets of differential input transistors. The input transistors can be configured as either an inverting or non-inverting amplifier, depending on the configuration chosen. The output from the amplifier is then fed to a rail-to-rail output stage, which provides high accurate output voltage levels. The high slew rate and low phase delay of the device allow for fast and precise amplification.

The SI8920AD-ISR from Silicon Laboratories is a high-performance, low power instrumentation amplifier, which can be leveraged in a wide range of application fields. With its adjustable gain, rail-to-rail inputs and outputs, wide gain error bandwidth and low power consumption, the SI8920AD-ISR is an excellent choice for precision signal conditioning. Whether it is medical, automotive, industrial, or consumer applications, the SI8920AD-ISR is an ideal option.

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