LTC5532_09 Datasheet, PDF (1/16 Pages) Linear Technology – Precision 300MHz to 7GHz RF Detector with Gain and Offset Adjustment

LTC5532
Precision 300MHz to 7GHz
RF Detector with Gain
and Offset Adjustment
FEATURES
s _{Temperature Compensated Internal Schottky}
Diode RF Detector
s _{Wide Input Frequency Range: 300MHz to 7GHz*}
s _{Wide Input Power Range: –32dBm to 10dBm}
s _{Buffered Detector Output with External Gain Control}
s _{Precision VOUT Offset Control}
s _{Low Starting 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}
and Tiny 6-Lead (2mm × 2mm) DFN 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^®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 or (2mm ×
2mm) DFN package. The supply voltage range is opti-
mized for operation from a single lithium-ion cell or 3×
NiMH.
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 starting voltage of 120mV ±35mV can be
precisely adjusted using the V_OS pin.
The LTC5532 operates with RF input power levels from
–32dBm to 10dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*Higher frequency operation is achievable with reduced performance. Consult factory for more
information.
TYPICAL APPLICATIO
300MHz to 7GHz RF Power Detector
(SOT-23 Package)
33pF
RF
INPUT
1
RF_IN
V_CC ⁶
LTC5532ES6
2
GND
5
V_OUT
V_OS
REFERENCE
3
V_OS
4
V_M
100pF
R_A
R_B
5532 TA01
V_CC
0.1µF
Output Voltage vs RF Input Power
(SOT-23 Package)
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
5532f
1