LTC5533_15 Datasheet, PDF (1/12 Pages) Linear Technology – 300MHz to 11GHz Precision Dual RF Power Detector

FEATURES
■ _{Two Independent Temperature Compensated}
Schottky Diode RF Peak Detectors
■ _{45dB Channel-to-Channel Isolation at 2GHz}
■ _{Wide Input Frequency Range: 300MHz to 11GHz*}
■ _{Wide Input Power Range: –32dBm to 12dBm}
■ _{Buffered Detector Outputs with Gain of 2x}
■ _{Adjustable VOUT Starting Voltage}
■ _{Wide VCC Range of 2.7V to 6V}
■ _{Low Operating Current: <500µA/Channel}
■ _{Low Shutdown Current: <2µA/Channel}
■ _{4mm × 3mm DFN Package}
U
APPLICATIO S
■ _{PA Forward and Reverse Power Monitor}
■ _{Dual PA Transmit Power Control}
■ _{802.11a, b, g, 802.15, WiMAX}
■ _{PA Linearization}
■ _{Fixed Wireless Access}
■ _{RF Power Alarm}
■ _{Envelope Detector}
LTC5533
300MHz to 11GHz Precision
Dual RF Power Detector
DESCRIPTIO
The LTC^®5533 is a dual channel RF power detector for RF
applications operating in the 300MHz to 11GHz range.
Two independent temperature compensated Schottky di-
ode peak detectors and buffer amplifiers are combined in
a small 4mm × 3mm DFN package.
The RF input voltage is peak detected using on-chip
Schottky diodes. The detected voltage is buffered and
supplied to the V_OUT pins. A power saving shutdown mode
reduces current to less than 2µA/channel. The initial
output starting voltages can be precisely adjusted using
the V_OS pins.
The LTC5533 operates with input power levels from
–32dBm to 12dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.
TYPICAL APPLICATIO
V_CC
0.1µF
300MHz to 11GHz RF Power Detectors
100pF
V_OS1
100pF
V_OS2
LTC5533
V_CC1 RF_IN1
V_OUT1 GND1
V_OS1 SHDN1
V_CC2 RF_IN2
V_OUT2 GND2
V_OS2 SHDN2
(EXPOSED PAD)
39pF
RF1 INPUT
39pF
RF2 INPUT
DISABLE ENABLE
5533 TA01
Output Voltage vs RF Input Power
3600
3200
2800
V_CC = 3.6V
V_OS = 0V
T_A = 25°C
2400
2000
1600
1200
800
400
4GHz
1GHz
5GHz
500MHz
6GHz
8GHz
11GHz
10GHz
9GHz
0
–28 –24 –20 –16 –12 –8 –4 0 4
RF INPUT POWER (dBm)
8 12
5533 TA02
5533f
1