OPA2170AIDGKR

OPA2170AIDGKR application field and working principle

The OPA2170AIDGKR op-amp is a high-performance instrumentation amplifier and buffer amplifier sometimes referred to as a low noise instrumentation amplifier (LNIA). This type of amplifier is often used in industrial applications such as data acquisition, sensor-based systems, medical instrumentation, and other industrial control loops. The OPA2170AIDGKR has an integrated “buffer amplifier” that provides high common-mode rejection (CMR) and improved input offset voltage, and it can be used to buffer or isolate the input from the output of a circuit.

Design

The OPA2170AIDGKR op-amp features two outputs, one inverted and one non-inverted. It works in a classic operational amplifier configuration with the two inputs set to a precise voltage level and the output signal amplified on both outputs depending on the input. It can be used in inverting or non-inverting circuits and is suitable for a variety of signal conditioning, signal clamping, and instrumentation applications.

The OPA2170AIDGKR is a standard, low-noise integrated circuit (IC) capable of achieving very low noise performance with a high signal-to-noise ratio (SNR). For example, it has a specific input-referred noise level of 1 nV/sqrt(Hz). It has a high open-loop gain of around 100 dB and a bandwidth of over 250 kHz. It also has a temperature range from -40°C to +85°C, and a power supply range of 1.8 to 6 V.

Common Applications

The OPA2170AIDGKR is typically used in applications where a high CMR and low noise level are desired. Common applications include sensor conditioning and data acquisition, instrumentation applications, audio applications, medical instrumentation, and other industrial control loop applications. This type of amplifier is ideal for applications where low noise and high common mode rejection are necessary.

One of the most common applications of the OPA2170AIDGKR is as an instrumentation amplifier. This type of amplifier is capable of measuring small changes in input signals and can be used for analog-to-digital conversion (ADC). The OPA2170AIDGKR can also be used as a buffer amplifier to isolate the output from the input or as a voltage or current follower.

Working principle

The OPA2170AIDGKR operates on the same principle as an operational amplifier; the two inputs are set to a precise voltage level and the output signal is amplified. The OPA2170AIDGKR has an integrated buffer amplifier which helps to achieve a high common-mode rejection (CMR) and ensures a low input offset voltage. The amplifier has an open-loop gain of around 100 dB, a bandwidth of over 250 kHz, and a temperature range of -40°C to +85°C. It can operate on power supplies between 1.8 V and 6 V.

In an instrumentation amplifier application, the OPA2170AIDGKR is typically used to measure small changes in input signals. The two inputs are set to a precise voltage level and the output signal is amplified by the OPA2170AIDGKR\'s buffer amplifier. This ensures a high common-mode rejection (CMR) and low noise performance with a high signal-to-noise ratio (SNR). The output signal can then be sent to an ADC for digitization or used in other applications.

Conclusion

The OPA2170AIDGKR is a versatile instrumentation amplifier with a high common-mode rejection and low input offset voltage. It can be used for analog-to-digital conversion, buffer amplifier applications, voltage or current follower applications, and more. This type of amplifier is ideal for applications where a low noise level and a high CMR is desired.