450 MHz to 6000 MHz TruPwr Detector ADL5504 FEATURES FUNCTIONAL BLOCK DIAGRAM VPOS True rms response detector Excellent temperature stability ADL5504 INTERNAL ENBL FILTERING 0.25 dB rms detection accuracy vs. temperature 1k FLTR Over 35 dB input power dynamic range, inclusive of crest factor 100 RF bandwidths from 450 MHz to 6000 MHz RFIN RMS CORE VRMS 500 input impedance BUFFER Single-supply operation: 2.5 V to 3.3 V Low power: 1.8 mA at 3.0 V supply COMM RoHS compliant part Figure 1. APPLICATIONS Power measurement of W-CDMA, CDMA2000, QPSK-/QAM- 10 based OFDM (LTE and WiMAX), and other complex modulation waveforms RF transmitter or receiver power measurement 1 0.1 0.01 25 20 15 10 5 0 5 10 15 INPUT (dBm) Figure 2. Output vs. Input Level, 3 V Supply, Frequency 1900 MHz GENERAL DESCRIPTION The ADL5504 is a TruPwr mean-responding (true rms) power The on-chip modulation filter provides adequate averaging for detector for use in high frequency receiver and transmitter signal most waveforms. For more complex waveforms, an external chains from 450 MHz to 6000 MHz. Requiring only a single capacitor at the FLTR pin can be used for supplementary signal supply between 2.5 V and 3.3 V, the detector draws less than demodulation. An on-chip, 100 s eries resistance at the out put, 1.8 mA. The input is internally ac-coupled and has a nominal combined with an external shunt capacitor, creates a low-pass filter input impedance of 500 . The rms output is a linear-responding response that reduces the residual ripple in the dc output voltage. dc voltage with a conversion gain of 1.87 V/V rms at 900 MHz. The ADL5504 offers excellent temperature stability across a The ADL5504 is a highly accurate, easy to use means of 30 dB range and near 0 dB measurement error across temperature determining the rms of complex waveforms. It can be used for over the top portion of the dynamic range. In addition to its power measurements of both simple and complex waveforms temperature stability, the ADL5504 offers low process variations but is particularly useful for measuring high crest factor (high that further reduce calibration complexity. peak-to-rms ratio) signals, such as W-CDMA, CDMA2000, The power detector operates from 40C to +85C and is WiMAX, WLAN, and LTE waveforms. available in a 6-ball, 0.8 mm 1.2 mm, wafer level chip scale package. It is fabricated on a high fT silicon BiCMOS process. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2009-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. OUTPUT (V) 08437-001 08437-002ADL5504 TABLE OF CONTENTS Features .............................................................................................. 1 RF Input Interfacing ................................................................... 14 Applications ....................................................................................... 1 Linearity ....................................................................................... 15 Functional Block Diagram .............................................................. 1 Output Drive Capability and Buffering ................................... 16 General Description ......................................................................... 1 Selecting the Square-Domain Filter and Output Low-Pass Filter ............................................................................................. 16 Revision History ............................................................................... 2 Power Consumption, Enable, and Power-On/Power-Off Specifications ..................................................................................... 3 Response Time ............................................................................ 17 Absolute Maximum Ratings ............................................................ 6 Device Calibration and Error Calculation .............................. 17 ESD Caution .................................................................................. 6 Calibration for Improved Accuracy ......................................... 18 Pin Configuration and Function Descriptions ............................. 7 Drift over a Reduced Temperature Range .............................. 19 Typical Performance Characteristics ............................................. 8 Device Handling ......................................................................... 19 Circuit Description ......................................................................... 13 Evaluation Board ........................................................................ 20 RMS Circuit Description and Filtering ................................... 13 Outline Dimensions ....................................................................... 22 Filtering ........................................................................................ 13 Ordering Guide .......................................................................... 22 Output Buffer .............................................................................. 13 Applications Information .............................................................. 14 Basic Connections ...................................................................... 14 REVISION HISTORY 1/11Rev. 0 to Rev. A Change to Filtering Section ........................................................... 13 Change to Land Pattern and Soldering Information Section ... 20 10/09Revision 0: Initial Version Rev. A Page 2 of 24