Datasheet ADL5505 (Analog Devices)

450 MHz to 6000 MHz TruPwr Detector ADL5505 FEATURES FUNCTIONAL BLOCK DIAGRAM True rms response detector VPOS Excellent temperature stability ADL5505 ±0.25 dB rms detection accuracy vs. temperature INTERNAL FILTERING Over 35 dB input power dynamic range, inclusive of crest factor RF bandwidths from 450 MHz to 6000 MHz 100Ω RFIN RMS CORE VRMS 500 Ω input impedance Single-supply operation: 2.5 V to 3.3 V BUFFER Low power: 1.8 mA at 3.0 V supply
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COMM RoHS-compliant part
05799- 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 (V) T PU T U O 0.1 0.01 –25 –20 –15 –10 –5 0 5 10 15
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INPUT (dBm)
05799- 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 Ω 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 Ω. 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 −40°C to +85°C 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 fT silicon BiCMOS process.
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Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Circuit Description RMS Circuit Description and Filtering Filtering Output Buffer Applications Information Basic Connections RF Input Interfacing Resistive Tap RF Input Multiple RF Inputs Linearity Output Swing Output Offset Output Drive Capability and Buffering Selecting the Output Low-Pass Filter Power Consumption Device Calibration and Error Calculation Calibration for Improved Accuracy Drift Over a Reduced Temperature Range Device Handling Land Pattern and Soldering Information Evaluation Board Outline Dimensions Ordering Guide