LTC5530_15 Datasheet, PDF (1/12 Pages) Linear Technology – Precision 300MHz to 7GHz RF Detector with Shutdown and Gain Adjustment

LTC5530
Precision 300MHz to 7GHz
RF Detector with Shutdown
and Gain 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 _{Low Starting Voltage: 120mV ±35mV for Gain = 2X}
s _{Wide VCC Range of 2.7V to 6V}
s _{Low Operating Current: 500µA}
s _{Low Shutdown Current: <2µA}
s _{Available in a Low Profile (1mm) SOT-23 Package}
U
APPLICATIO S
s _{802.11a, 802.11b, 802.11g, 802.15, 802.16}
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^®5530 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 output buffer gain is set via
external resistors. A power saving shutdown mode re-
duces current to less than 2µA.
The LTC5530 operates with 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
33pF
LTC5530
RF
INPUT
1
RF_IN
V_CC ⁶
2
GND
V_OUT ⁵
3
DISABLE ENABLE SHDN
R_A
4
V_M
5530 TA01
R_B
100pF
V_CC
0.1µF
Output Voltage vs RF Input Power
3600
3200
2800
V_CC = 3.6V
T_A = 25°C
GAIN = 2
2400
2000
1600
300MHz
1000MHz
2000MHz
3000MHz
4000MHz
5000MHz
6000MHz
7000MHz
1200
800
400
0
–32 –28 –24 –20 –16 –12 –8 –4 0
RF INPUT POWER (dBm)
48
5530 TA02
5530f
1