LT1792IS8#PBF

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LT1792IS8#PBF

Application Field and Working Principle

The LT1792IS8#PBF is a high precision instrumentation amplifier that is part of Linear Technology\'s family of Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. It is designed for use in applications where low noise, high accuracy and low input offset voltage are required. In order to achieve these characteristics, the amplifier incorporates several design features to provide significant benefits compared to standard operational amplifiers.

Differential Input Stage

The input stage of the LT1792IS8#PBF uses a differential amplifier architecture which provides several performance benefits. By using a differential amplifier stage, the input stage offers good common-mode rejection and is less susceptible to noise. As the differential amplifier stage amplifies the difference between the two input signals, the input offset voltage is greatly reduced compared to a single-ended amplifier stage. As the input offset voltage is a major source of error for the amplifier, the differential stage offers improved precision and accuracy.

Gain & Output Offset Capability

The LT1792IS8#PBF also has a two-stage gain and output offset capability. The first stage provides an adjustable gain of 1 to 10000, while the second stage enables a user-defined output offset range. This feature allows the amplifier to be adjusted to achieve the best performance for each specific application. For example, this amplifier can be used as a low offset instrumentation amplifier, or as an adjustable gain buffer for large signal range applications. This feature can also be used to fine tune the gain and offset settings for higher accuracy.

Low Noise

The low input noise of the LT1792IS8#PBF allows it to be used in applications where low noise is important. The input voltage noise of this amplifier is 9nV/√Hz, while the current noise is 0.25pA/√Hz. This low noise combined with high accuracy makes the LT1792IS8#PBF an ideal choice for applications such as data acquisition systems, high resolution measurement systems and instrumentation.

Robust Performance

The LT1792IS8#PBF is designed for use in a wide range of operating conditions. The amplifier has a wide operating temperature range from -40 to +85 C and can withstand a supply voltage range from 2.7 to 18V. The device is also specified for a wide range of power supply rejection ratios and is rated for load ranges up to 110 kohm. This ensures that the amplifier can handle a wide range of operating conditions and is suitable for a variety of applications.

Conclusion

The LT1792IS8#PBF is a high precision differential input instrumentation amplifier that offers low noise, high accuracy and low input offset voltage. The amplifier has a differential input stage, adjustable gain, output offset capability and is robust enough to operate in a variety of conditions. This makes it an ideal choice for applications such as data acquisition systems, high resolution measurement systems and instrumentation where low noise, high accuracy and low input offset are required.

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