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

17th December 2009

Analog Devices

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Datasheet

Analog Devices, Inc. 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.

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: www.analog.com/buy

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.