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LTC5505-1 Datasheet

  • LTC5505-1

  • RF Power Detector with Buffered Output and >40dB Dynamic Ran...

  • 8頁

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LTC5505-1/LTC5505-2
RF Power Detector
with Buffered Output and >40dB
Dynamic Range
FEATURES
s
DESCRIPTIO
s
s
s
s
s
s
s
Internal Schottky Diode RF Detector with Two Input
Power Ranges:
LTC5505-1, 鈥?8dBm to 18dBm
LTC5505-2, 鈥?2dBm to 12dBm
Wide Input Frequency Range: 300MHz to 3GHz
(LTC5505-1); 300MHz to 3.5GHz (LTC5505-2)
Temperature Compensated
Buffered Detector Output
Wide V
CC
Range of 2.7V to 6V
Low Operating Current: 0.5mA
Low Shutdown Current: <2碌A
Low Profile (1mm) ThinSOT
TM
Package
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 2碌A.
The LTC5505-1 operates with input power levels from
鈥?8dBm to 18dBm. The LTC5505-2 operates with input
power levels from 鈥?2dBm to 12dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation
APPLICATIO S
s
s
s
s
s
s
Multimode Mobile Phone Products
PCS Devices
Wireless Data Modems
Wireless and Cable Infrastructure
RF Power Alarm
Envelope Detector
TYPICAL APPLICATIO
Dual Band Mobile Phone Tx Power Control
R1
100鈩?/div>
RF
1
2
DISABLE ENABLE
3
LTC5505-X
V
CC
5
RF
IN
GND
SHDN
V
OUT
4
C1
0.3pF
Tx PA MODULE
C2
0.1碌F
Li-Ion
CELL BAND
DIPLEXER
PCS BAND
MOBILE PHONE
DSP
V
PC
5505 TA01
BSE
U
5505f
U
U
1

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