adl5504 Analog Devices, Inc., adl5504 Datasheet
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adl5504
Manufacturer Part Number
adl5504
Description
450 Mhz To 6000 Mhz Trupwr Detector
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADL5504.pdf
(24 pages)
FEATURES
True rms response detector
Excellent temperature stability
±0.25 dB rms detection accuracy vs. temperature
Over 35 dB input power dynamic range, inclusive of crest factor
RF bandwidths from 450 MHz to 6000 MHz
500 Ω input impedance
Single-supply operation: 2.5 V to 3.3 V
Low power: 1.8 mA at 3.0 V supply
RoHS compliant part
APPLICATIONS
Power measurement of W-CDMA, CDMA2000, QPSK-/QAM-
RF transmitter or receiver power measurement
GENERAL DESCRIPTION
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 is a highly accurate, easy to use means of
determining the rms of complex waveforms. It can be used for
power measurements of both simple and complex waveforms
but is particularly useful for measuring high crest factor (high
peak-to-rms ratio) signals, such as W-CDMA, CDMA2000,
WiMAX, WLAN, and LTE waveforms.
Rev. 0
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
based OFDM (LTE and WiMAX), and other complex
modulation waveforms
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The on-chip modulation filter provides adequate averaging for
most waveforms. For more complex waveforms, an external
capacitor at the FLTR pin can be used for supplementary signal
demodulation. An on-chip, 100 Ω 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.
The power detector operates from −40°C to +85°C and is
available in a 6-ball, 0.8 mm × 1.2 mm, wafer level chip scale
package. It is fabricated on a high f
Figure 2. Output vs. Input Level, 3 V Supply, Frequency 1900 MHz
0.01
0.1
10
ENBL
RFIN
1
–25
FUNCTIONAL BLOCK DIAGRAM
–20
ADL5504
450 MHz to 6000 MHz
–15
RMS CORE
©2009 Analog Devices, Inc. All rights reserved.
1kΩ
COMM
VPOS
–10
Figure 1.
TruPwr Detector
INPUT (dBm)
–5
T
BUFFER
silicon BiCMOS process.
FILTERING
INTERNAL
0
100Ω
ADL5504
5
www.analog.com
FLTR
VRMS
10
15