LTC5532 Datasheet, PDF (1/12 Pages) Linear Technology – 300MHz to 7GHz Precision RF Power Detector with Gain and Offset Adjustment

Final Electrical Specifications
LTC5532
300MHz to 7GHz
Precision RF Power Detector
with Gain and Offset Adjustment
FEATURES
DESCRIPTIO
August 2003
s _{Temperature Compensated Internal Schottky}
Diode RF Detector
s _{Wide Input Frequency Range: 300MHz to 7GHz}
s _{Wide Input Power Range: –32dBm to 8dBm}
s _{Buffered Detector Output with External Gain Control}
s _{Precision VOUT Offset Control}
s _{Low Offset Voltage: 120mV ±35mV for Gain = 2x}
s _{Wide VCC Range of 2.7V to 6V}
s _{Low Operating Current: 500µA}
s _{Available in a Low Profile (1mm) SOT-23 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}
The LTC^®5532 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 ThinSOT^TM 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.
The LTC5532 output buffer gain is set via external resis-
tors. The initial offset voltage of 120mV ±35mV can be
precisely adjusted using the V_OS pin.
The LTC5532 operates with input power levels from
–32dBm to 8dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
300MHz to 7GHz RF Power Detector
33pF
LTC5532
RF
INPUT
1
RF_IN
V_CC ⁶
2
GND
V_OUT ⁵
V_OS
REFERENCE
3
V_OS
4
V_M
5532 TA01
100pF
R_A
R_B
V_CC
0.1µF
Output Voltage vs RF Input Power
3600
V_CC = 3.6V
3200 ^TA ^{= 25°C}
GAIN = 2
2800 V_OS = 0V
2400
1000MHz
300MHz
2000
4000MHz
1600
1200
800
2000MHz
3000MHz
5000MHz
400
6000MHz
0
7000MHz
–32 –27 –22 –17 –12 –7 –2 3 8
RF INPUT POWER (dBm)
5532 TA02
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
5532i
1