LTC5508_15 Datasheet, PDF (1/8 Pages) Linear Technology – 300MHz to 7GHz RF Power Detector with Buffered Output in SC70 Package

LTC5508
300MHz to 7GHz RF Power
Detector with Buffered Output
in SC70 Package
FEATURES
s _{Temperature Compensated Internal Schottky}
Diode RF Detector
s _{Wide Input Frequency Range: 300MHz to 7GHz}
s _{Wide Input Power Range: –32dBm to 12dBm}
s _{Buffered Detector Output}
s _{Wide VCC Range of 2.7V to 6V}
s _{Low Operating Current: 550µA}
s _{Low Shutdown Current: <2µA}
s _{SC70 Package}
U
APPLICATIO S
s _{802.11a, 802.11b, 802.11g, 802.15}
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^®5508 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 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. A power saving shutdown mode
reduces supply current to less than 2µA.
The LTC5508 operates with input power levels from
–32dBm to 12dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
300MHz to 7GHz RF Power Detector
RF
INPUT
33pF
LTC5508
6
RF_IN
V_CC ⁴
2
GND
GND ⁵
DISABLE ENABLE
1
SHDN
V_OUT ³ _VOUT
100pF
V_CC
0.1µF
5508 TA01
Output Voltage vs RF Input Power
10000
V_CC = 3.6V
T_A = 25°C
1000
2GHz
1GHz
7GHz
6GHz
4GHz
100
–32 –28 –24 –20 –16 –12 –8 –4 0 4 8 12
RF INPUT POWER (dBm)
5508 TA02
5508fa
1