LTC5505-1 Datasheet, PDF (1/8 Pages) Linear Technology – RF Power Detector with Buffered Output and >40dB Dynamic Range

LTC5505-1/LTC5505-2
RF Power Detector
with Buffered Output and >40dB
Dynamic Range
FEATURES
s _{Internal Schottky Diode RF Detector with Two Input}
Power Ranges:
LTC5505-1, –28dBm to 18dBm
LTC5505-2, –32dBm to 12dBm
s _{Wide Input Frequency Range: 300MHz to 3GHz}
(LTC5505-1); 300MHz to 3.5GHz (LTC5505-2)
s _{Temperature Compensated}
s _{Buffered Detector Output}
s _{Wide VCC Range of 2.7V to 6V}
s _{Low Operating Current: 0.5mA}
s _{Low Shutdown Current: <2µA}
s _{Low Profile (1mm) ThinSOT}^TM _Package
U
APPLICATIO S
s _{Multimode Mobile Phone Products}
s _{PCS Devices}
s _{Wireless Data Modems}
s _{Wireless and Cable Infrastructure}
s _{RF Power Alarm}
s _{Envelope Detector}
DESCRIPTIO
The LTC^®5505-X is an RF power detector for RF applica-
tions operating in the 300MHz to 3.5GHz range. A tem-
perature compensated Schottky diode peak detector and
buffer amplifier are combined in a small 5-pin ThinSOT
package. The supply voltage range is optimized for opera-
tion 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 LTC5505-1 operates with input power levels from
–28dBm to 18dBm. The LTC5505-2 operates with input
power levels from –32dBm to 12dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation
TYPICAL APPLICATIO
Dual Band Mobile Phone Tx Power Control
R1
100Ω
C1
0.3pF
DISABLE ENABLE
RF
1
LTC5505-X
RF_IN
V_CC
5
2
GND
3
SHDN
V_OUT ⁴
C2
0.1µF
Li-Ion
Tx PA MODULE
CELL BAND
PCS BAND
DIPLEXER
MOBILE PHONE
DSP
V_PC
BSE
5505 TA01
5505f
1