TL3472IP

TL3472IP Application Field and Working Principle

The TL3472IP is a functional and wide-band precision monolithic instrumentation amplifier. It is a two-stage, low noise and high common-mode rejection ratio (CMRR) instrumentation amplifier. The instrumentation amplifier combines a high CMRR and low offset voltage drift and can amplify signals with wide dynamic range. The application field of TL3472IP includes medical equipment, data acquisition systems, and other scientific instruments.

Working Principle

At the first stage, TL3472IP employs two matched transistors, with the current source biasing, to form a differential input stage. This differential input stage converts differential input signals into a single-ended output voltage and provides the required gain for the application.

At the second stage, the patient output is fully differential amplified using an Operational Transconductance Amplifier (OTA). The OTA functions as a buffer or a differential amplifier by controlling the magnitude of its transconductance. Therefore, TL3472IP provides an adjustable gain, high CMRR and high bandwidth. The amplifier can also provide an independent bias to the input, reducing the need for an additional circuit.

Benefits of TL3472IP

One of the benefits of TL3472IP is the wide dynamic range and high CMRR. The CMRR of the device is greater than 120dB across a wide frequency range of 1 000Hz to beyond 1MHz. As such, it is able to accurately amplify differential inputs with a signal-to-noise ratio of more than 65dB. Moreover, the amplifier is capable of maintaining an offset voltage drift of 0.7V\u00b5V/\u00b5C over the full temperature range. Additionally, TL3472IP consumes low power and consumes less than 65mW when operated from a single 5V supply.

TL3472IP is applicable in a wide variety of applications. It is suitable for use in a wide range of differential input applications including data acquisition systems, medical systems and other precision instruments. Furthermore, it can be used in various embedded systems applications such as touchscreens and mobile devices.

Conclusion

In conclusion, the TL3472IP is a precision monolithic instrumentation amplifier with wide dynamic range, low-noise and high common-mode rejection ratio. It has adjustable gain, low offset voltage drift, and low power consumption.