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LTC5531 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC5531
Description  Precision 300MHz to 7GHz RF Detector with Shutdown and Offset Adjustment
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC5531 Datasheet(HTML) 1 Page - Linear Technology

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LTC5531
1
5531f
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
DESCRIPTIO
s
802.11a, 802.11b, 802.11g, 802.15, 802.16
s
Multimode Mobile Phone Products
s
Optical Data Links
s
Wireless Data Modems
s
Wireless and Cable Infrastructure
s
RF Power Alarm
s
Envelope Detector
s
Temperature Compensated Internal Schottky
Diode RF Detector
s
Wide Input Frequency Range: 300MHz to 7GHz*
s
Wide Input Power Range: –32dBm to 10dBm
s
Buffered Detector Output
s
Precision VOUT Offset Control
s
Wide VCC Range of 2.7V to 6V
s
Low Operating Current: 500
µA
s
Low Shutdown Current: <2
µA
s
Available in a Low Profile (1mm) SOT-23 Package
Precision 300MHz to 7GHz
RF Detector with Shutdown
and Offset Adjustment
The LTC
®5531 is an RF power detector for RF applications
operating in the 300MHz to 7GHz range. A temperature
compensated Schottky diode peak detector and buffer
amplifier are combined in a small ThinSOT
TM package. The
supply voltage range is optimized for operation from a
single lithium-ion cell or 3xNiMH.
The RF input voltage is peak detected using an on-chip
Schottky diode. The detected voltage is buffered and
supplied to the VOUT pin. A power saving shutdown mode
reduces current to less than 2
µA. The initial offset voltage
of 120mV
±35mV can be precisely adjusted using the
VOS pin.
The LTC5531 operates with input power levels from
–32dBm to 10dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
300MHz to 7GHz RF Power Detector
LTC5531
1
2
3
6
5
4
100pF
0.1
µF
VCC
VOS
REFERENCE
VCC
VOUT
RFIN
GND
SHDN
33pF
5531 TA01
RF
INPUT
VOS
DISABLE ENABLE
VOUT Output Voltage vs RF Input Power
3600
3200
2800
2400
2000
1600
1200
800
400
0
RF INPUT POWER (dBm)
5531 TA02
–30 –26 –22 –18 –14 –10 –6 –2
2
6
10
VOS = 0V
VCC = 3.6V
TA = 25°C
7000MHz
300MHz
6000MHz
5000MHz
1000MHz
2000MHz
3000MHz
4000MHz
ThinSOT is a trademark of Linear Technology Corporation.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.


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