adl5504 Analog Devices, Inc., adl5504 Datasheet

adl5504

Manufacturer Part Number

adl5504

Description

450 Mhz To 6000 Mhz Trupwr Detector

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADL5504.pdf (24 pages)

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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

ENBL

RFIN

–25

FUNCTIONAL BLOCK DIAGRAM

–20

ADL5504

450 MHz to 6000 MHz

–15

RMS CORE

1kΩ

COMM

VPOS

–10

Figure 1.

TruPwr Detector

INPUT (dBm)

–5

BUFFER

silicon BiCMOS process.

FILTERING

INTERNAL

100Ω

ADL5504

www.analog.com

FLTR

VRMS

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