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RMS detector operates over 450MHz to 6000MHz

Posted: 15 Jun 2010     Print Version  Bookmark and Share

Keywords:RMS detector  crest factor  W-CDMA  CDMA2000 

Analog Devices, Inc. unveils a TruPwr RF power detector that is tailored for measuring high crest factor (high peak-to-RMS ratio) signals, in 3G and 4G Devices such as W-CDMA, CDMA2000, WiMAX, WLAN and LTE waveforms. Boasting the industry's smallest footprint at 0.8mmx0.8mm, the ADL5505 TruPwr RMS detector allows optimisation of the linear power amplifier's performance to increase efficiency and battery life. It can be used for power measurements of both simple and complex waveforms.

Furthermore, with industry-leading specifications, the ADL5505 power detector eliminates the need for look-up tables and correction factors for large and changing crest factors, significantly increasing efficiency, battery life and signal quality while reducing bill of materials cost.

It delivers an excellent temperature stability across a 30dB range and near 0dB measurement error across temperature over the top portion of the dynamic range. It is effective in high-frequency receiver and transmitter signal chains from 450MHz to 6000MHz. It requires only a single supply between 2.5V and 3.3V, the detector draws less than 1.8mA. RMS output is a linear-responding DC voltage with a conversion gain of 1.86V/V RMS at 900MHz. It packs an on-chip modulation filter to provide sufficient averaging for most waveforms.

The ADL5505 is available now in a 0.8mm x 0.8mm WLCSP package and is priced at Rs.115.44 ($2.50) per unit in 1,000-unit quantities.

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