LTC5509_15 Datasheet, PDF (1/8 Pages) Linear Technology – 300MHz to 3GHz RF Power Detector in SC70 Package

LTC5509
300MHz to 3GHz
RF Power Detector
in SC70 Package
FEATURES
s _{Temperature Compensated Internal Schottky Diode}
RF Detector
s _{Wide Input Frequency Range: 300MHz to 3GHz}
s _{Wide Input Power Range: –30dBm to 6dBm}
s _{Buffered Detector Output}
s _{Wide VCC Range of 2.7V to 6V}
s _{Low Operating Current: 600µA}
s _{Low Shutdown Current: <2µA}
s _{SC70 Package}
U
APPLICATIO S
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}
DESCRIPTIO
The LTC^®5509 is an RF power detector for RF applications
operating in the 300MHz to 3GHz range. A temperature
compensated Schottky diode peak detector and buffer
amplifier are combined in a small SC70 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 V_OUT pin without gain compression. Con-
sequently, the output voltage is linearly proportional to the
RF input voltage. A power saving shutdown mode reduces
supply current to less than 2µA.
The LTC5509 operates with input power levels from
–30dBm to 6dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
300MHz to 3GHz RF Power Detector
RF
INPUT
33pF
6
LTC5509
RF_IN
V_CC
4
2
GND
GND ⁵
DISABLE ENABLE
1
SHDN
V_OUT ³ _VOUT
100pF
V_CC
0.1µF
5509 TA01
Output Voltage vs RF Input Power
3000
V_CC = 3.6V
T_A = 25°C
2500
2000
1500
850MHz
1.85GHz
3GHz
1000
500
0
–30 –25 –20 –15 –10 –5 0
RF INPUT POWER (dBm)
5 10
5509 TA02
5509f
1