ADL5500ACBZ-P7(RevB) Просмотр технического описания (PDF) - Analog Devices
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ADL5500ACBZ-P7 Datasheet PDF : 24 Pages
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Data Sheet
100 MHz to 6 GHz
TruPwr Detector
ADL5500
FEATURES
True rms response
Excellent temperature stability
±0.1 dB accuracy vs. temperature over top 8 dB of input range
Up to 30 dB input dynamic range at 3.9 GHz
50 Ω input impedance
1250 mV rms, +15 dBm, maximum input
Single-supply operation: 2.7 V to 5.5 V
Low power: 3 mW at 3 V supply
RoHS compliant
APPLICATIONS
Measurement of CDMA2000, W-CDMA, and QPSK-/QAM-
based OFDM, and other complex modulation waveforms
RF transmitter or receiver power measurement
GENERAL DESCRIPTION
The ADL5500 offers excellent temperature stability with near
0 dB measurement error across temperature. The high accuracy
range, centered around +3 dBm at 900 MHz, offers ±0.1 dB
error from −40°C to +85°C over an 8.5 dB range. The ADL5500
reduces calibration requirements with low drift across a 30 dB
range over temperature and process variations.
The ADL5500 operates from −40°C to +85°C and is available in
a 4-ball, 1.0 mm × 1.0 mm wafer-level chip scale package. It is
fabricated on a proprietary high fT silicon bipolar process.
5
1
The ADL5500 is a mean-responding power detector for use in
high frequency receiver and transmitter signal chains from
100 MHz to 6 GHz. It is easy to apply, requiring only a single
supply between 2.7 V and 5.5 V and a power supply decoupling
capacitor. The input is internally ac-coupled and has a nominal
input impedance of 50 Ω. The output is a linear-responding dc
voltage with a conversion gain of 6.4 V/V rms at 900 MHz. The
on-chip, 1 kΩ 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.
0.1
0.03
–25 –20 –15 –10 –5
0
INPUT (dBm)
5
10
15
Figure 1. Output vs. Input Level, Supply 3 V, Frequency 1.9 GHz
The ADL5500 is intended for true power measurement of simple
and complex waveforms. The device 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.
FUNCTIONAL BLOCK DIAGRAM
RFIN
ADL5500
i
x2
TRANS-
CONDUCTANCE
CELLS
i
x2
INTERNAL FILTER
CAPACITOR
VPOS
ERROR
AMP
BUFFER
VRMS
1kΩ
Figure 2.
COMM
Rev. B
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