NCS20081SN3T1G

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NCS20081SN3T1G – Instrumentation Amplifier

The NCS20081SN3T1G amplifier is a monolithic dual high-voltage instrumentation amplifier designed to provide accurate performance over a wide range of motion. The devices are designed to provide superior accuracy, dynamic range, and long-term stability in linear applications. The devices feature robust input protection, wide supply ranges, and excellent input noise immunity making them ideal for instrumentation and measurement applications such as core sensing, temperature sensing, and analog-to-digital converter (ADC) bridge amplifiers.

Features

• High Output Current: 0.5A
• Wide Supply Range: 3V–20V
• Fast Slew Rate: 25V/μs
• Input Protection: >20V
• Low Adjustable Offset Voltage: 14μV
• Low Input Noise: 11nV/√Hz
• Excellent Common-Mode Rejection: >95dB
• High Common-Mode Range: ±15V

Applications

• Core Sensing
• Temperature Sensing
• ADC Bridge Amplifiers
• Alarm Control
• Data Acquisition Systems

Working Principle of NCS20081SN3T1G

The NCS20081SN3T1G amplifier is a monolithic dual high-voltage instrumentation amplifier. The device consists of two gain stages and an adjustable offset nulling stage. The gain of the amplifier is determined by the ratio between the resistors, R1 and R2, in the gain resistor network and the adjustable span resistor. The adjustable offset nulling stage provides the ability to adjust the output voltage of the amplifier. The input stage of the amplifier is protected from large differential voltages (> 20 V) by two ESD protection circuits. The device also features wide supply ranges, fast slew rate and excellent common-mode rejection.

The input stage of the amplifier is designed to provide high impedance and low noise performance. The amplifier is capable of providing a high input impedance of >2 GΩ. This high impedance increases the signal-to-noise ratio, allowing for better noise performance. Low input noise is also achieved by using an internal band-gap reference, which provides a low noise reference voltage.

The gain of the amplifier is adjusted by adding or subtracting external resistors to the gain resistor network. The resistors in the network are designed to provide a wide range of gains (1, 5, 10, 20, and 30). The adjustable offset nulling stage is used to trim the output voltage of the amplifier, allowing for higher accuracy over supply and temperature conditions.

The amplifier features a wide common-mode range and excellent common-mode rejection. The common-mode rejection is determined by the ratio of the two gain resistors in the gain resistor network. The common-mode range is designed to cover a wide range of inputs (+/-15V).

The NCS20081SN3T1G instrumentation amplifier is an excellent choice for a wide range of applications requiring accurate and stable performance over a wide range of conditions. With its wide supply range, fast slew rate, and excellent input protection, the device is well suited for core sensing, temperature sensing, and ADC bridge applications. The excellent common-mode rejection and adjustable offset nulling stage make it well suited for analog-to-digital conversion and data acquisition systems.

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