ADA4858-3ACPZ-R2

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The ADA4858-3ACPZ-R2 is a high-speed, voltage feedback amplifier that is used for measurement and signal conditioning circuits. With its wide supply voltage range, high output current drive capability, and low input offset the ADA4858-3ACPZ-R2 is an excellent choice for amplifier applications.

Application Field

The ADA4858-3ACPZ-R2 is designed as a general purpose, wide bandwidth amplifier that can be used in a variety of applications. As a voltage feedback device it is ideal for use in instrumentation and signal conditioning applications that require high speed and low distortion. It can be used as a high-speed active filter or used as an instrumentation amplifier with gain ranges from unity to thousands. It also can be configured as an audio power amplifier and can even be used as a unity gain buffer if needed.

Operation Principle

The ADA4858-3ACPZ-R2 operates under the principle of inverting or non-inverting amplifier with gain. The input voltage is applied to the non-inverting or inverting input of the amplifier. Depending on the configuration of the resistor network, the amplifier will amplify the input voltage by a gain factor, which is determined by the ratio of resistors in the feedback network.

If the amplifier is used as an inverting amplifier, the output voltage is the input voltage multiplied by the gain, with the sign reversed. The non-inverting configuration will, on the other hand, result in the output voltage being the input voltage multiplied by the gain with the same sign.

Input and Output Objectives

The amplifier has an input stage and an output stage. The input stage consists of an input buffer and voltage feedback circuitry. The input buffers provide an impedance match between the input signal and the amplifier. The voltage feedback circuitry helps regulate and shape the gain of the amplifier. The output stage consists of an output buffer and current feedback circuitry. The output buffer provides an impedance match between the output signal and the amplifier. The current feedback circuitry helps ensure a precise level of current is being drawn from the output.

Noise Performance

The ADA4858-3ACPZ-R2 has excellent noise performance with a low output noise voltage of 10µVrms and a low input noise voltage of 3.8µVrms. The power supply noise is also low with a power supply rejection ratio of >60dB.

Power Consumption

The amplifier consumes a moderate amount of current, typically 25mA when operating at a 5V supply voltage. The power dissipation of the amplifier is low, typically 0.125W when operating at a 5V supply voltage.

Package and Dimensions

The ADA4858-3ACPZ-R2 is available in a lead-free MSOP-8 package with a total package size of 2.4mm x 4.4mm. The device has an operating temperature range from -40℃ to +85℃.

Conclusion

The ADA4858-3ACPZ-R2 is an excellent choice for amplifier applications in instrumentation and signal conditioning applications that require wide bandwidth and low distortion. It offers high output current drive capability and low input offset, as well as excellent noise performance and power consumption. The device comes in an MSOP-8 package with a wide operating temperature range and low power dissipation.

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