OPA137NA/250G4

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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The OPA137NA/250G4 is an instrumentation amplifier and a buffer amplifier integrated circuit (IC) from the OPA137 series. This specific version operates from a single 5V supply and has a wideband gain of 4 V/V maximum. This IC is widely used in industrial and communications applications due to its high linearity, low noise, and fast settling time.

Application Field

The OPA137NA/250G4 is widely used as an instrumental amplifier, as it has high linearity, low distortion, low noise, and fast settling time. This IC is ideal for medical, process control, and communications applications. Additionally, it can be used in systems requiring a gain-controlled variable amplifier such as AGC (Automatic Gain Control) systems.

Its superior low-noise and wideband gain makes it an optimal amplifier for precision-measurement and process-control applications. Its exceptionally fast settling time, guaranteed at 2.5 µs (or less) over a 0 V to 5 V range, enables the OPA137NA/250G4 to achieve precision by providing rapid response to changes in the input.

Working Principle

The OPA137NA/250G4 variable gain instrumentation amplifier operates from a 5V supply, and provides a differential voltage gain up to 4 V/V. The gain is determined by two external resistors. The two inputs, IN+ and IN-, are differential inputs and the output is an analog voltage, or current, proportional to the difference between them.

The OPA137NA/250G4 is unity gain stable, which means the amplifier can accept an input signal and cause the output to swing from one power supply rail to the other. Stability is achieved by using feedback loops, which compare the input signal with the output signal and then cause the amplifier to reduce the gain if required. The OPA137NA/250G4 also includes a low offset voltage, typically 0.2mV, and has a maximum offset voltage of 1mV.

The OPA137NA/250G4 also features a wide bandwidth, with a peak gain-bandwidth of 500kHz. This makes it ideal for high-frequency applications, such as audio signal processing, signal conditioning, video processing, and sensor based signal acquisition. The OPA137NA/250G4 also has low distortion and low noise figures, making it an excellent amplifier for applications that require both a high signal-to-noise ratio and low distortion.

The OPA137NA/250G4 is designed to meet automotive requirements and has a temperature range of -40° to +125°C. This makes it suitable for use in extreme environmental conditions, such as those found in automotive applications. The excellent temperature stability makes the OPA137NA/250G4 ideal for precision control operations, such as those required in medical systems.

Conclusion

The OPA137NA/250G4 is a high-performance instrumentation amplifier and buffer amplifier IC. It has a wide gain-bandwidth, low distortion and low noise levels, fast settling time, and exceptional temperature stability. Its wideband gain makes it ideal for precision measurement and process control applications, and its low power requirements make it suitable for automotive applications. All these features make the OPA137NA/250G4 a versatile and powerful amplifier IC.

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