HCPL-7850#100

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HCPL-7850#100 Application Field and Working Principle

The HCPL-7850#100 instrumentation amplifier is a low cost, high accuracy, and low noise differential amplifier designed for use in both industrial and medical applications. It has been designed specifically for amplification of low level signals in any noise environment. It has very low input bias currents and can operate at a wide range of supply voltages.

The HCPL-7850#100 instrumentation amplifier is comprised of two high-linearity amplifiers, separated by a precision resistor gain set-point. This provides a high-precision, low-noise differential to single-ended conversion with excellent PSRR and CMRR. It has been carefully optimized for linearity and noise performance in low voltage systems, with a wide supply voltage range from 2.6V to 36V.

It is well optimized for low-noise conditions due to its very low input bias current of just 0.5 nA. This allows lower noise performance than with any other differential amplifier product. It also features low quiescent current consumption and low distortion across the audio and RF frequency range. The device also comes with an optional internal gain set option, which reduces the external components needed.

The HCPL-7850#100 instrumentation amplifier is used in applications such as measuring low-signal analog signals, low-power audio amplifiers, RF signal detection, medical instrumentation, and temperature measurement. It is ideal for applications requiring maximum signal-to-noise performance such as medical ultrasound systems. It can also be used as a differential line receiver in standard ECL systems and low voltage systems.

Working Principle

The HCPL-7850#100 operational amplifier is an operational transconductance amplifier (OTA) based device. It has two input terminals, one differential and one common mode, each of which is driven by a different input voltage. The input voltage applied to the differential terminal is amplified by the device’s gain and then applied to the other input terminal. The output voltage of the amplifier is the difference between the two input voltages.

This difference between the two input voltages is amplified by the OTA’s gain, producing a current which is proportional to the difference between the two voltages. The current produced is then converted to a voltage by using a precision resistor. The resistor is meant to provide gain related to the amount of current flowing through it. The output voltage of the instrumentation amplifier is a function of the amount of current flow through the resistor and the gain of the OTA.

The key feature of the instrumentation amplifier is its high performing differential and common mode rejection. This is due to the fact that the input voltage applied to the device is amplified by the gain of the OTA and is then applied to both input terminals. This means that any noise or interference on one of the inputs will be cancelled out by the other. This cancellation is due to the input voltage being amplified by the OTA and applied at both inputs.

The HCPL-7850#100 instrumentation amplifier is designed to provide maximum signal-to-noise performance, high linearity, and low-power consumption. This makes it ideal for use in many different types of signal conditioning and signal detection applications.

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