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Analog Devices - LF to 2.7 GHz Dual 60 dB TruPwr Detector

Numéro de référence AD8364
Description LF to 2.7 GHz Dual 60 dB TruPwr Detector
Fabricant Analog Devices 
Logo Analog Devices 





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AD8364 fiche technique
Data Sheet
FEATURES
RMS measurement of high crest-factor signals
Dual-channel and channel difference outputs ports
Integrated accurately scaled temperature sensor
Wide dynamic range ±1 dB over 60 dB
±0.5 dB temperature-stable linear-in-dB response
Low log conformance ripple
+5 V operation at 70 mA, –40°C to +85°C
Small footprint, 5 mm × 5 mm, LFCSP
APPLICATIONS
Wireless infrastructure power amplifier linearization/control
Antenna VSWR monitor
Gain and power control and measurement
Transmitter signal strength indication (TSSI)
Dual-channel wireless infrastructure radios
GENERAL DESCRIPTION
The AD8364 is a true rms, responding, dual-channel RF power
measurement subsystem for the precise measurement and control
of signal power. The flexibility of the AD8364 allows communi-
cations systems, such as RF power amplifiers and radio transceiver
AGC circuits, to be monitored and controlled with ease. Operating
on a single 5 V supply, each channel is fully specified for operation
up to 2.7 GHz over a dynamic range of 60 dB. The AD8364
provides accurately scaled, independent, rms outputs of both RF
measurement channels. Difference output ports, which measure
the difference between the two channels, are also available. The
on-chip channel matching makes the rms channel difference
outputs extremely stable with temperature and process variations.
The device also includes a useful temperature sensor with an
accurately scaled voltage proportional to temperature, specified
over the device operating temperature range. The AD8364 can
be used with input signals having rms values from −55 dBm to
+5 dBm referred to 50 Ω and large crest factors with no
accuracy degradation.
LF to 2.7 GHz
Dual 60 dB TruPwr™ Detector
AD8364
FUNCTIONAL BLOCK DIAGRAM
VPSA 25
INHA 26
INLA 27
PWDN 28
COMR 29
INLB 30
INHB 31
VPSB 32
24 23 22 21 20 19 18 17
TEMP
VGA
CONTROL
CHANNEL A
TruPwr™
ISIG2
ITGT2
OUTA
OUTB
CHANNEL B
TruPwr™
ISIG2
ITGT2
VGA
BIAS CONTROL
1 2 3 4 5 6 78
16 VSTA
15 OUTA
14 FBKA
13 OUTP
12 OUTN
11 FBKB
10 OUTB
9 VSTB
Figure 1. Functional Block Diagram
Integrated in the AD8364 are two matched AD8362 channels
(see the AD8362 data sheet for more information) with improved
temperature performance and reduced log conformance ripple.
Enhancements include improved temperature performance and
reduced log-conformance ripple compared to the AD8362. On-
chip wide bandwidth output operational amplifiers are connected
to accom-modate flexible configurations that support many
system solutions.
The device can easily be configured to provide four rms
measurements simultaneously. Linear-in-dB rms measurements
are supplied at OUTA and OUTB, with conveniently scaled
slopes of 50 mV/dB. The rms difference between OUTA and
OUTB is available as differential or single-ended signals at
OUTP and OUTN. An optional voltage applied to VLVL
provides a common mode reference level to offset OUTP and
OUTN above ground.
The AD8364 is supplied in a 32-lead, 5 mm × 5 mm LFCSP, for
the operating temperature of –40°C to +85°C.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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