EVAL-PRAOPAMP-2RZ

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The Evaluation Board - Op Amps, can be used to evaluate the performance of a broad range of operational amplifiers (Op Amp). This type of board can be used to assess the functionality of the devices for different characteristics and applications. One of these boards, the EVAL-PRAOPAMP-2RZ, is designed to evaluate the performance of two-rail op amps with rail-to-rail outputs. This application note provides an overview of the EVAL-PRAOPAMP-2RZ board and its operation.

EVAL-PRAOPAMP-2RZ Overview

The EVAL-PRAOPAMP-2RZ is an evaluation board designed to assess the performance of two-rail op amps with rail-to-rail outputs. This kit is suited for an array of applications like DC linear conversion, full power audio, full power RF, and high speed signal processing. The board contains a number of features to ensure the accurate operation of the device. These features include the following:

• Input Impedances: The board is designed with a pair of input resistors to simulate an open-circuit condition. The resistors have a low effective impedance to minimize signal loading and ensure correct device operation by providing a more accurate platform.
• Output Impedance: The board uses a high-quality capacitor to simulate a short-circuit condition. This ensures the reliability of the amplifier by preventing distortion.
• Compensated Gain: The board allows users to adjust the amount of gain by varying the feedback resistor, thus ensuring the correct amplifier performance.
• Supply Voltage: The board is designed to operate from 4.5 V to 5.5 V with a switched dual voltage option allowing for operation at 3.3 V.
• Current Limit: A resistor connected to the output of the board allows users to easily adjust the current limit of the device.

EVAL-PRAOPAMP-2RZ Operation

The board supports two common configurations of op amps: single-ended and differential. The user can switch between these configurations by relocating the connection of the feedback resistor. Using the board in single-ended mode allows for a wider frequency range since the amplifier is not constrained by the delay of the feedback network.

When operating in differential mode, the board provides users the ability to adjust the common-mode gain of the amplifier. This allows the user to accurately adjust the amount of gain at all audio frequencies. The board also provides the ability to switch between unity gain and non-unity gain operation.

To properly operate the board, it must be connected to an appropriate power supply. The board can accommodate a variety of power supplies, including both AC and DC sources. The positive and negative power supplies must be connected to the corresponding positive and negative supply pins of the amplifier. Once the power supplies are connected, the user can adjust the gain of the amplifier by varying the feedback resistor. The user must also ensure that the load of the amplifier does not exceed the maximum output current rating of the device.

Conclusion

In conclusion, the EVAL-PRAOPAMP-2RZ evaluation board is designed for evaluating two-rail open-output amplifiers. This board provides features like variable gain adjustment, current limit control and an easy switch between single-ended and differential modes. The board is also designed with various impedance matching components to ensure accurate and reliable operation of the device. Proper use of the board requires proper connection to an appropriate dc power supply. Following these steps allows users to quickly and accurately assess the performance of the device.

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