ADL5502-EVALZ AD [Analog Devices], ADL5502-EVALZ Datasheet

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ADL5502-EVALZ

Manufacturer Part Number
ADL5502-EVALZ
Description
800 MHz to 3800 MHz Crest Factor Detector
Manufacturer
AD [Analog Devices]
Datasheet
Preliminary Technical Data
FEATURES
True rms response detector
Envelope output with peak hold option
Excellent temperature stability
±0.25 dB rms detection accuracy vs. temperature
±0.25 dB envelope detection accuracy vs. temperature;
Over 30 dB input power dynamic range, inclusive of crest
RF bandwidths from 800 MHz to 3.8 GHz
Envelope bandwidths of 10 MHz
500 Ω input impedance
Single-supply operation: 2.7 V to 3.5 V
Low power: 5 mA at 3 V supply
RoHS compliant
APPLICATIONS
Power and envelope measurement of W-CDMA, CDMA2000,
RF transmitter or receiver power and envelope measurement
GENERAL DESCRIPTION
The ADL5502 is a mean-responding power detector in
combination with an envelope detector to accurately determine
the crest factor of a modulated signal. It can be used in high
frequency receiver and transmitter signal chains from 800 MHz
to 3.8 GHz with envelope bandwidths over 10 MHz. Requiring
only a single supply between 2.7 V and 3.5 V, the detector draws
less than 5 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 2.0 V/Vrms at 900 MHz. The envelope
output with a conversion gain of 1.4 V/V can be toggled
between real-time envelope measurement or peak hold with less
than TBD mV droop in over 200 μS.
Rev. PrD (04/20/2008)
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.
over the top 15 dB of the input range
factor, up to 3.8 GHz
and QPSK-/QAM-based OFDM, 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 ADL5502 is a highly accurate, easy to use means of
determining the peak to average value of complex waveforms.
It can be used for crest factor measurements of both simple and
complex waveforms, but is particularly useful for measuring
high crest factor (high peak-to-rms ratio) signals, such as
CDMA2000, W-CDMA, and QPSK/QAM-based OFDM
waveforms. The peak hold function allows the capture of short
peaks in the envelope with lower sampling rate ADC’s.
The crest factor detector operates from −40°C to +85°C and is
available in an 8-ball, 1.5 mm × 1.5 mm wafer-level chip scale
package. It is fabricated on a high f
Crest Factor Detector
800 MHz to 3800 MHz
©2008 Analog Devices, Inc. All rights reserved.
Figure 1.
T
silicon BiCMOS process.
ADL5502
www.analog.com

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ADL5502-EVALZ Summary of contents

Page 1

... Trademarks and registered trademarks are the property of their respective owners. 800 MHz to 3800 MHz Crest Factor Detector Figure 1. The ADL5502 is a highly accurate, easy to use means of determining the peak to average value of complex waveforms. It can be used for crest factor measurements of both simple and complex waveforms, but is particularly useful for measuring ...

Page 2

... ADL5502 SPECIFICATIONS T = 25° 3 100 nF, light condition ≤ 600 LUX, unless otherwise noted. Including 50 ohm input termination resistor FLT Table 1. Parameter FREQUENCY RANGE RMS CONVERSION (f = 450 MHz) Input Impedance 1 Dynamic Range 2 ±0.25 dB Error 3 ±1 dB Error 3 ±2 dB Error Maximum Input Level ...

Page 3

... ±0.25 dB error ±1 dB error VRMS = (Gain × Intercept dBm, 400 mV rms −21 dBm rms IN Rev. PrD (04/20/2008) | Page ADL5502 Min Typ Max Unit 316||0.9 Ω|| TBD dBm TBD dBm 1.80 V/V rms ...

Page 4

... ADL5502 Parameter RMS CONVERSION (f = 3500 MHz) Input Impedance 1 Dynamic Range 2 ±0.25 dB Error ±1 dB Error 3 3 ±2 dB Error Maximum Input Level Minimum Input Level Conversion Gain 4 Output Intercept Output Voltage—High Power In Output Voltage—Low Power In VRMS OUTPUT Output Offset Response time ...

Page 5

... This is a stress rating only; functional operation of the device at these or any S other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. PrD (04/20/2008) | Page ADL5502 ...

Page 6

... ADL5502 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Ball No. Mnemonic Description 1 FLTR Modulation Filter Pin. Connection for an External Capacitor to lower the corner frequency of the modulation filter 2 VPOS Supply Voltage Pin. Operational range 2 3 RFIN Signal Input Pin. Internally ac-coupled after internal termination resistance. Nominal 500 Ω input impedance. ...

Page 7

... MHz 2700 MHz 3500 MHz -25 -20 -15 - INPUT (dBm) 1900 MHz, 2350 MHz, 2700 MHz, and 3500 MHz, Supply 3.0 V Figure 7. Input Impedance vs. Frequency, Supply 3.0 V, Temperatures −40°C, +25°C, and +85°C at −40°C and +85°C, Frequency 900 MHz ADL5502 ...

Page 8

... ADL5502 Figure 9. VRMS Temperature Drift Distributions for Mulitple Devices at −40°C, +25°C, and +85°C vs. +25°C Linear Reference, Frequency1 900 MHz Figure 10. VRMS Temperature Drift Distributions for Mulitple Devices at −40°C, +25°C, and +85°C vs. +25°C Linear Reference, Frequency 2350 MHz 1 ...

Page 9

... PRELIMINARY TECHNICAL DATA Figure 15.v Envelope Error (representative of Crest Factor) from rms Reference vs. Input with Various WCDMA and CDMS2000 Reverse Link Waveform,; at 1900 MHz nF, C FLTR v = 4.7 nF, OU Rev. PrD (04/20/2008) | Page ADL5502 Figure 16. Peak Hold Response Time ...

Page 10

... To operate the device in peak-hold mode, the control line must be temporally set to HI (envelope mode) and then set back to LO (peak-hold mode). This allows the ADL5502 to be initialize to a known state. For envelope mode or rms use only, the control line can simply be set to HI ...

Page 11

... PRELIMINARY TECHNICAL DATA Figure 19. Layout of Evaluation Board, Component Side Figure 18. Evaluation Board Schematic Figure 20. Layout of Evaluation Board, Circuit Side Rev. PrD (04/20/2008) | Page ADL5502 ...

Page 12

... In the opposite switch position, the ENBL pin is connected to VPOS and the ADL5502 is in operating mode. While the switch is in the disabled position, the ENBL pin can be driven by a signal generator via the SMA labeled ENBL. In this case, R1 must be removed or changed to provide a 50 Ω ...

Page 13

... Temperature Model Range 1 ADL5502ACBZ-P7 –40°C to +85°C 1 ADL5502ACBZ-P2 –40°C to +85°C ADL5502-EVALZ Pb-free part. Figure 21. 8-Bump Wafer Level Chip Scale Package [WLCSP] (TBD) Dimensions shown in millimeters Package Description 8-Lead WLCSP, 7” Pocket Tape and Reel 8-Lead WLCSP, 7” Pocket Tape and Reel Evaluation Board Rev ...

Page 14

... ADL5502 NOTES © 2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR07631-0-6/08(PrD) Rev. PrD (04/20/2008) | Page Preliminary Technical Data ...

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