Datasheet LTC5530 (Analog Devices)

LTC5530 Precision 300MHz to 7GHz RF Detector with Shutdown and Gain Adjustment
U FEATURES DESCRIPTIO
■
Temperature Compensated Internal Schottky
The LTC®5530 is an RF power detector for RF applications
Diode RF Detector
operating in the 300MHz to 7GHz range. A temperature ■
Wide Input Frequency Range: 300MHz to 7GHz*
compensated Schottky diode peak detector and buffer ■
Wide Input Power Range: –32dBm to 10dBm
amplifier are combined in a small ThinSOTTM package. The ■
Buffered Detector Output with External Gain Control
supply voltage range is optimized for operation from a ■
Low Starting Voltage: 120mV
±
35mV for Gain = 2X
single lithium-ion cell or 3xNiMH. ■
Wide VCC Range of 2.7V to 6V
The RF input voltage is peak detected using an on-chip ■ Low Operating Current: 500µA Schottky diode. The detected voltage is buffered and ■ Low Shutdown Current: <2µA supplied to the V ■ Available in a Low Profile (1mm) SOT-23 Package OUT pin. The output buffer gain is set via external resistors. A power saving shutdown mode re-
U
duces current to less than 2µA.
APPLICATIO S
The LTC5530 operates with input power levels from ■ 802.11a, 802.11b, 802.11g, 802.15, 802.16 –32dBm to 10dBm. ■ Multimode Mobile Phone Products ■ Optical Data Links , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Wireless Data Modems ThinSOT is a trademark of Linear Technology Corporation.
*
Higher frequency operation is achievable with reduced performance. Consult factory for more ■ Wireless and Cable Infrastructure information. ■ RF Power Alarm ■ Envelope Detector
U TYPICAL APPLICATIO Output Voltage vs RF Input Power
3600 VCC = 3.6V 300MHz
300MHz to 7GHz RF Power Detector
3200 TA = 25°C 1000MHz GAIN = 2 2800 2000MHz 33pF 3000MHz LTC5530 1 2400 RF 6 4000MHz V RF CC V IN CC INPUT 5000MHz 2000 100pF 0.1µF 6000MHz 2 5 1600 7000MHz GND VOUT 1200 R OUTPUT VOLTAGE (mV) A 3 4 OUT 800 DISABLE ENABLE SHDN VM V 400 5530 TA01 RB 0 –32 –28 –24 –20 –16 –12 –8 –4 0 4 8 RF INPUT POWER (dBm) 5530 TA02 5530f 1