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ADL5519 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADL5519
Description  1 MHz to 10 GHz, 50 dB Dual Log Detector/Controller
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADL5519 Datasheet(HTML) 1 Page - Analog Devices

 
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1 MHz to 10 GHz, 50 dB
Dual Log Detector/Controller
Preliminary Technical Data
ADL5519
Rev. PrB
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Wide bandwidth: 1 MHz to 10 GHz
Dual-channel and channel difference outputs ports
Integrated accurately scaled temperature sensor
50 dB dynamic range up to 8 GHz
Stability over temperature ±0.5 dB
Low noise measurement/controller output VOUT
Pulse response time: 8/10 ns (fall/rise)
Small footprint 5 mm x 5 mm LFCSP package
Supply operation: 3.0 V to 5.5 V @ 65 mA
Fabricated using high speed SiGe process
APPLICATIONS
RF transmitter PA setpoint control and level monitoring
Power monitoring in radiolink transmitters
RSSI measurement in base stations, WLAN, WiMAX, radar
Antenna VSWR monitor
Dual-channel wireless infrastructure radios
GENERAL DESCRIPTION
The ADL5519 is a dual-demodulating logarithmic amplifier,
using the AD8317 core. It has the capability of accurately
converting an RF input signal to a corresponding decibel-scaled
output. The ADL5519 provides accurately scaled, independent,
logarithmic 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 log-amp 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 ADL5519 maintains accurate log conformance for signals of
1 MHz to 8 GHz and provides useful operation to 10 GHz. The
input dynamic range is typically 50 dB (re: 50 Ω) with error less
than ±1 dB. The ADL5519 has 8/10 ns response time (fall
time/rise time) that enables RF burst detection to a pulse rate of
beyond 50 MHz. The device provides unprecedented logarithmic
intercept stability vs. ambient temperature conditions. A supply of
3.0 V to 5.5 V is required to power the device. Current
consumption is typically 65 mA, and it decreases to 1 mA when
the device is disabled.
The device is capable of supplying four log-amp measurements
simultaneously. Linear-in-dB measurements are provided at
OUTA and OUTB, with conveniently scaled slopes of -22
mV/dB. The log-amp 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. On-chip wide bandwidth output op amps are
connected to accommodate flexible configurations that support
many system solutions.
The ADL5519 can be easily configured to provide a control
voltage to a power amplifier at any output pin. Since the output
can be used for controller applications, special attention has
been paid to minimize wideband noise
The ADL5519 is fabricated on a SiGe bipolar IC process and is
available in a 5 mm × 5 mm, 32-lead LFCSP package for an
operating temperature range of −40oC to +125oC..
CHANNEL A
Log Detector
CHANNEL B
Log Detector
INHB
INLB
COMR
PWDN
INLA
INHA
OUTB
FBKB
OUTN
OUTP
FBKA
OUTA
BIAS
TEMP
OUTB
OUTA
25
26
27
28
29
30
31
32
COMR
COMR
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
25
26
27
28
29
30
31
32
NC
NC
Figure 1. Functional Block Diagram


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