LMH730227/NOPB

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Evaluation boards are used for testing the performance and accuracy of a wide range of operational amplifiers. The LMH730227/NOPB is designed to be used with both single- and dual-supply operational amplifiers, including unity gain (gain = 1) and higher gain (gain > 1) amplifiers. It has a number of features that make it suitable for a range of applications that require accurate, low-noise measurements. This article will provide an overview of the LMH730227/NOPB\'s application field and working principle.

Application Field

The LMH730227/NOPB is used to test single- or dual-supply operational amplifiers. It facilitates easy testing and comparison of different amplifiers and can also be used to verify the performance of a particular amplifier. It is designed to minimize differences and artifacts caused by board layout and signal routing. The board is supplied with a standard configuration of four op-amps and can be configured with single- or dual-supply operation.

Input/Output Configuration

The LMH730227/NOPB provides a flexible and comprehensive input/output configuration. It includes an on-board power supply, an adjustable gain, and a flexible user interface. The board also features an output stage, which is switchable between unity gain (gain = 1) and higher gain (gain > 1) configurations. The user interface allows for fine control over gain and offset adjustments, and a single switch to switch between the two gain configurations.

Noise Performance

The LMH730227/NOPB has been designed to operate in low-noise environments. It is equipped with an onboard low-noise amplifier as well as filtering circuits to reduce noise due to crosstalk and other interference. This ensures that the measured signals are as accurate as possible. In addition, the board features an enhanced reject mode with a greater than 70 dB rejection at 2 kHz, allowing for clean measurements even in noisy environments.

Bias and Offset Control

The LMH730227/NOPB has an adjustable bias voltage that can be set to optimize the performance of the amplifier. The board also provides an adjustable offset voltage, for calibration and ensuring that the desired signals are accurately measured. Both the bias and offset can be adjusted for single-supply or dual-supply use.

Offset Pin

The LMH730227/NOPB also provides a dedicated offset pin. This pin is used to calibrate the board and ensures accuracy in measurements when the board is used in single-supply applications. The pin can be adjusted for different gains and provides a more accurate offset voltage than other boards.

Working Principle

The LMH730227/NOPB operates by supplying a single fixed voltage, typically to the input of an operational amplifier. When an input voltage is applied to the board, it amplifies the voltage to an output level according to the gain setting. The output voltage is then used to measure the gain of the amplifier and determine its performance. The gain can be adjusted using the board’s adjustable knobs or for single-supply operation, the offset pin. The board also features an output stage, which can be switched between a unity gain and a higher gain configuration.

Conclusion

The LMH730227/NOPB is a useful evaluation board for testing the performance of operational amplifiers. It is designed to minimize differences and artifacts caused by board layout and signal routing, and features a range of user interface and noise performance features. These features make it an ideal evaluation board for use with single- and dual-supply amplifiers. The board is also supplied with a standard configuration of four op-amps and can be configured with single- or dual-supply operation.

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