450 MHz to 6000 MHz TruPwr Detector ADL5505 FEATURES FUNCTIONAL BLOCK DIAGRAM VPOS True rms response detector Excellent temperature stability ADL5505 INTERNAL 0.25 dB rms detection accuracy vs. temperature FILTERING 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 10 Power measurement of W-CDMA, CDMA2000, QPSK-/QAM- 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, Supply = 3.0 V, Frequency = 1900 MHz GENERAL DESCRIPTION The ADL5505 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. An on-chip, 100 series resistance at the chains from 450 MHz to 6000 MHz. Requiring only a single output, combined with an external shunt capacitor, creates a low- supply between 2.5 V and 3.3 V, the detector draws less than pass filter response that reduces the residual ripple in the dc output 1.8 mA. The input is internally ac-coupled and has a nominal voltage. input impedance of 500 . The rms output is a linear-responding The ADL5505 offers excellent temperature stability across a dc voltage with a conversion gain of 1.86 V/V rms at 900 MHz. 30 dB range and near 0 dB measurement error across temperature The ADL5505 is a highly accurate, easy to use means of over the top portion of the dynamic range. In addition to its determining the rms of complex waveforms. It can be used for temperature stability, the ADL5505 offers low process variations power measurements of both simple and complex waveforms that further reduce calibration complexity. but is particularly useful for measuring high crest factor (high The power detector operates from 40C to +85C and is peak-to-rms ratio) signals, such as W-CDMA, CDMA2000, available in an 4-ball, 0.8 mm 0.8 mm wafer-level chip scale WiMAX, WLAN, and LTE waveforms. package. It is fabricated on a high f silicon BiCMOS process. T 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. 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OUTPUT (V) 05799-001 05799-002ADL5505 TABLE OF CONTENTS Features .............................................................................................. 1 Basic Connections ...................................................................... 14 Applications ....................................................................................... 1 RF Input Interfacing ................................................................... 14 Functional Block Diagram .............................................................. 1 Linearity ....................................................................................... 15 General Description ......................................................................... 1 Output Drive Capability and Buffering ................................... 16 Revision History ............................................................................... 2 Selecting the Output Low-Pass Filter ...................................... 16 Specifications ..................................................................................... 3 Power Consumption .................................................................. 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 ............................. 18 Typical Performance Characteristics ............................................. 8 Device Handling ......................................................................... 18 Circuit Description ......................................................................... 13 Land Pattern and Soldering Information ................................ 18 RMS Circuit Description and Filtering ................................... 13 Evaluation Board ........................................................................ 18 Filtering ........................................................................................ 13 Outline Dimensions ....................................................................... 20 Output Buffer .............................................................................. 13 Ordering Guide .......................................................................... 20 Applications Information .............................................................. 14 REVISION HISTORY 1/11Rev. 0 to Rev. A Updated Outline Dimensions, Figure 46..................................... 20 Change to Ordering Guide, Package Option .............................. 20 4/10Revision 0: Initial Version Rev. A Page 2 of 20