LT1101ACN8#PBF

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LT1101ACN8#PBF Application Field and Working Principle

LT1101ACN8#PBF, produced by Linear Technology Corporation, is a series of monolithic, single, three-terminal, field-effect amplifiers. This series of instrumentation amplifiers has a wide range of application fields and a simple working principle.

Application Field

The LT1101ACN8#PBF series instrumentation amplifier is especially suitable for temperature measurement and control, 4-20mA and voltage loops, PLC analog input subsystems, light and current measurement, programmable controller systems, load cell applications, and high side current sensing.

It can also be applied to active filters, adjustable gain blocks, AC line-powered applications, bridge transducers, bridge completion, chopper stabilized gain blocks, current measurement, current-shunt monitoring, gain and offset adjust, industrial process control, instrumentation amplifiers, level controls, low frequency filter design, power supplies and motor control.

LT1101ACN8#PBF series instrumentation amplifiers can meet the requirements of high accuracy, low cost and fast thermal response, pay attention to many parameters such as low temperature coefficient, high accuracy and reliability, suitable higher impedance signals, and low input voltage and current noise.

Working Principle

This series of instrumentation amplifiers uses an integrated structure, consisting of an FET/bipolar input stage, a differential amplifying stage and an output stage, to amplify the voltage signals. The signal passes through the three-stage circuit to reduce the input current noise and increase common-mode rejection.

The input stage of the amplifier consists of two differential inputs with two opposite channel MOS field effect transistors (MOSFETs). This special combination allows the amplifier to reject common-mode signal components while amplifying the differential signal components.

The second stage of the amplifier is a differential amplifier that amplifies the signal. This stage is composed of bipolar transistor differential amplifiers, which can amplify the signal while ensuring linear amplification. The output stage consists of complementary NPN transistors and p-channel MOSFETs that are connected in tandem. This connection can provide a large output current range while providing the required protection to the amplifier.

The LT1101ACN8#PBF series instrumentation amplifiers integrate all of these stages into a single integrated circuit, allowing for a high precision, low noise, low power amplifier with a wide range of application fields.

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