Visit Thanks for visiting Thanks for visiting the RF Cafe Archives Thank you for visiting RF Cafe Thank you for visiting the RF Cafe Archives!

Analog Devices Press Release - December 16, 2009

Analog Devices' RMS Power Detector Offers Communications Customers Best-In-Class Power Management Device for 3G and 4G Mobile Terminals

- ADL5504 TruPwr™ RMS detector’s detection accuracy and temperature stability enables increased efficiency, battery life and signal quality; reduces manufacturing cost.

Visit Analog DevicesDecember 26, 2009 -- NORWOOD, Mass.-- (EON: Enhanced Online News)-- Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal-processing applications and RF integrated circuits, today announced the expansion of its industry-leading TruPwr™ RF power detector product family with the introduction of a new integrated device for 3G and 4G mobile terminals. The ADL5504 is a highly accurate, easy-to-use means of determining the RMS (root mean square) power of complex waveforms. It can be used for power measurements of both simple and complex waveforms and is particularly useful for measuring high crest factor (high peak-to-RMS ratio) signals, such as W-CDMA, CDMA2000, WiMAX, WLAN and LTE waveforms. It is also effective for optimizing the performance of linear power amplifiers. Furthermore, the ADL5504's temperature stability and waveform independence offer best-in-class accuracy at levels up to five times better than competitive devices, significantly increasing efficiency, battery life and signal quality.

ADL5504 block diagramAbout the ADL5504 TruPwr RMS Power Detector

The ADL5504 is a TruPwr™ mean-responding (true RMS) power detector for use in high frequency receiver and transmitter signal chains from 450 MHz to 6000 MHz. Requiring only a single supply between 2.5 V and 3.3 V, the detector draws less than 1.8 mA. The input is internally ac-coupled and has a nominal input impedance of 500 Ω. The RMS output is a linear-responding dc voltage with a conversion gain of 1.87 V/V RMS at 900 MHz. The ADL5504's on-chip modulation filter provides adequate averaging for most waveforms. For more complex waveforms, an external capacitor at the filter pin can be used for supplementary signal demodulation. An on-chip, 100 ohm series resistance at the output, combined with an external shunt capacitor, creates a low-pass filter response that reduces the residual ripple in the dc output voltage. The ADL5504 offers excellent temperature stability across a 30 dB range and near 0 dB measurement error across temperature over the top portion of the dynamic range. In addition to its temperature stability, the ADL5504 offers low process variations that further reduce calibration complexity and operates from −40°C to +85°C.

Pricing, Availability and Complementary Products

The ADL5504 is available now in a 0.8 x 1.2 mm WLCSP package and is priced at $3.00 per unit in 1,000-unit quantities. In addition to the RMS power detectors, ADI has a wide range of products used within mobile terminals including the MEMs accelerometers, audio amplifiers, HDMI interfaces, lens driver components, power management, audio switches and mobile TV tuners. To connect with a specialist, cross reference tools, and more resources on how to use and obtain ADI products, please click here:

ADI’s RF IC Portfolio Covers Entire RF Signal Chain

Using a unique combination of design skills, system understanding and process technologies, Analog Devices offers the broadest portfolio of RF ICs covering the entire RF signal chain from industry-leading high-performance RF function blocks to highly integrated WiMAX and short-range, single-chip transceiver solutions. The RF function blocks include DDS and PLL synthesizers; TruPwr RMS power detectors and logarithmic amplifiers; X-Amp® VGAs; power amplifiers, LNAs and other RF amplifiers, mixers and direct conversion modulator and demodulator products. These products are supported by a wide range of free design tools to ease the development of RF systems. For more information, visit:

About Analog Devices, Inc.

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest-standing, highest-growth companies within the technology sector. Acknowledged industry-wide as the world leader in data-conversion and signal-conditioning technologies, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits for analog- and digital-signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker “ADI” and is included in the S&P 500 Index.

Follow ADI on Twitter at


Analog Devices, Inc.
Colleen Cronin

Posted 12/18/2009