Understanding LMH2121 evaluation board

The LMH2121 is a power detector/RF envelope detector. Its response between an RF input signal and DC output signal is linear. The typical response time of 165 ns makes it suitable for accurate power setting in handsets during a rise-time of RF transmission slots. It can be used in all popular communication standards 2G/3G/4G/WAP. The LMH2121 has an input range from –28 dBm to +12 dBm. Over this input range the device has an intrinsic high insensitivity on temperature, supply voltage and loading. The bandwidth of the device is from 100MHz to 3GHz, covering 2G/3G/4G/WiFi wireless bands.

As a result of the internal architecture, the device shows a low part-to-part variation of the detection curve. This is demonstrated by its low intercept and slope variation as well as its linear conformance. Consequently the required characterization and calibration efforts are low.

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Originally published by Texas Instruments at www.ti.com as "LMH2121 Evaluation Board".