Datasheet LTC5531 (Analog Devices)

LTC5531 Precision 300MHz to 7GHz RF Detector with Shutdown and Offset Adjustment
U FEATURES DESCRIPTIO
■
Temperature Compensated Internal Schottky
The LTC®5531 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
supply voltage range is optimized for operation from a ■
Precision VOUT Offset Control
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. A power saving shutdown mode reduces current to less than 2µA. The initial offset voltage
U
of 120mV ±35mV can be precisely adjusted using the
APPLICATIO S
VOS pin. ■ 802.11a, 802.11b, 802.11g, 802.15, 802.16 The LTC5531 operates with input power levels from ■ Multimode Mobile Phone Products –32dBm to 10dBm. ■ 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 VOUT Output Voltage vs RF Input Power
3600
300MHz to 7GHz RF Power Detector
VOS = 0V 2000MHz 3200 VCC = 3.6V T 1000MHz A = 25°C 33pF 2800 LTC5531 4000MHz 1 RF 6 V RF 2400 CC V IN CC INPUT 3000MHz 100pF 0.1µF 2000 2 5 GND VOUT 1600 1200 300MHz OUTPUT VOLTAGE (mV) 3 4 VOS DISABLE ENABLE SHDN VOS 5000MHz REFERENCE OUT 800 V 6000MHz 5531 TA01 400 7000MHz 0 –30 –26 –22 –18 –14 –10 –6 –2 2 6 10 RF INPUT POWER (dBm) 5531 TA02 5531f 1