TRF1222IRTMR

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RF mixers are one of the essential ingredients in any radio-frequency (RF) system where they are used for up- or down-conversion, intermodulation cancellation, filtering, and noise reduction. In this article, we will delve into the TRF1222IRTMR, and discuss its application field and working principle.

TRF1222IRTMR Overview

The TRF1222IRTMR from Intersil is a RoHS-compliant, high-performance double-balanced Gilbert cell mixer that supports up- or down-conversion for wireless applications in the 500MHz to 2500MHz frequency range. It features low conversion loss and improved linearity, and is designed to simplify the board layout with its small form factor.

TRF1222IRTMR Application Field

As previously mentioned, the TRF1222IRTMR is a double-balanced Gilbert cell mixer used in RF systems. It is used for up-conversion, down-conversion, RF signal filtering, intermodulation cancellation, and noise reduction. It can be used in a wide range of devices including radio frequency identification (RFID) readers, wireless LAN radios, Bluetooth, drive test equipment, cellular infrastructure, and other industrial applications.

TRF1222IRTMR Working Principle

A linear Gilbert cell mixer produces the output by combining the two input signals directly. The RF signal is mixed with the local oscillator (LO) signal to produce the intermediate frequency (IF) signal. A non-inverting amplifier is connected to each of the RF and LO ports of the mixer. The outputs of the two amplifiers are then combined in the mixer to produce the IF signal. The gain of the non-inverting amplifiers is set to different values for up- and down-conversion.

The TRF1222IRTMR also has a test port that can be used as an active balun for the RF input. The output of the balun is fed back to the amplifier, resulting in greater linearity and better performance. Additionally, the TRF1222IRTMR also has an additional input port that can be used as an anti-parallel loop for improved gain performance.

Conclusion

The TRF1222IRTMR from Intersil is a high-performance, low-noise double-balanced Gilbert cell mixer. It is used for up- or down-conversion, intermodulation cancellation, noise reduction, and filtering in devices such as radio frequency identification (RFID) readers, wireless LAN radios, Bluetooth equipment, and more. The TRF1222IRTMR works by combining the two RF input signals in the mixer with the local oscillator, and can also be used with an active balun and anti-parallel loop for increased linearity and better performance.

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