RMS Power Detector

Industry's Most Accurate RMS Power Detector over Input Power Range, Regardless of Modulation

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The MAX2203 RMS power detector is designed to operate from 800MHz to 2.0GHz. The device is ideal for wideband code-division multiple access (WCDMA), cdma2000®, and high-speed downlink/uplink packet access. The MAX2203 accepts an RF signal at the input and outputs the same voltage regardless of the peak-average of the input signal. The output voltage and input power is linear in dB. The device has a -24dBm to +3dBm detection range, and every dB change in input power gives 35mV (typ) change in output voltage.

The MAX2203 operates from a 2.5V to 4.2V supply and is specified over the -40°C to +85°C extended temperature range. The device is available in a 6-bump WLP package.
MAX2203: Typical Operating Circuit MAX2203: Typical Operating Circuit Enlarge+

Key Features

  • -24dBm to +3dBm Power-Detection Range
  • 35mV/dB (typ) Log Detector
  • 0.1dB (typ) RMS Accuracy from WCDMA Modulation Change
  • ±0.4dB Detection Error Due to Temperature
  • +2.5V to +4.2V Single-Supply Operation
  • Space-Saving 6-Bump WLP Package


  • High-Speed Downlink Packet Access (HSDPA)
  • High-Speed Uplink Packet Access (HSUPA)
  • WCDMA, cdma2000, 1xEVDO
Request Reliability Report for: MAX2203 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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