OPA380AIDRG4

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The OPA380AIDRG4 is a unity gain stable voltage output op-amp designed for monitoring of ΔV, current, temperature as well as other transducer outputs.

The OPA380AIDRG4 is a very low power, low noise instrumentation amplifier, ideal for designs requiring good CMRR, low offset and good PSRR. It is built in an advanced BiCMOS process and has excellent DC and AC characteristics, making it suitable for a variety of applications, including precision power measurement and current-sensing instrumentation.

Application Field

OPA380AIDRG4 is used in precision measurement and current sensing instrumentation, with outstanding DC and AC characteristics. It is ideal for use in voltage-to-current and current-to-voltage converters and multiplexers. It is also suitable for applications that require precision control and monitoring of voltage, current, resistance, induction, capacitance, and temperature.

The OPA380AIDRG4 has been designed for use in applications requiring excellent common mode rejection ratio (CMRR) and power supply rejection ratio (PSRR). It can be used in a variety of instrumentation applications, such as power supplies, battery chargers and fuel gauge circuits in consumer devices, DC/DC converters, active filters, data converters, and industrial control systems. Additionally, it can be implemented in a variety of test and measurement systems and medical instrumentation.

Working Principle

The OPA380AIDRG4 has a wide bandwidth and is designed for unity gain stability. It is a three-stage amplifier, with the first stage configured as a differential input amplifier and the remaining two stages configured as an output gain stages. The differential amplifier stage has excellent CMRR, PSRR, and input offset voltage specifications. This helps to ensure precision measurements and a low input offset voltage, which is essential for applications requiring high accuracy over a wide temperature range.

The gain of the amplifier is determined by the ratio of the input resistances of the first two stages. This helps to optimize the amplifier gain over the lifetime of the product. The third stage of the amplifier is a voltage feedback amplifier, which allows the device to adapt its output voltage based on the input voltage and the gain setting of the operational amplifier. This provides excellent common mode rejection while also allowing the device to adapt to a wide range of input signals.

The gain of the OPA380AIDRG4 can be further optimized using external resistors that are connected to the device. These resistors act as a voltage divider, allowing the gain of the device to be adjusted for different input signal levels. This helps to ensure that the device is capable of accurately and accurately delivering the desired signal output.

The OPA380AIDRG4 also features a wide operating temperature range, which helps to ensure that it can be used in a variety of applications, from consumer electronics to industrial equipment. Additionally, it is extremely low power and provides improved noise immunity compared to other op-amps.

The OPA380AIDRG4 is an excellent choice for a variety of instrumentation, power measurement and current sensing applications. With its excellent AC and DC performance, low offset voltage, low noise, and wide temperature range, it is a reliable and cost-effective solution for a variety of designs.

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