Datasheet LTC5508 (Analog Devices)

LTC5508 300MHz to 7GHz RF Power Detector with Buffered Output in SC70 Package
U FEATURES DESCRIPTIO
■
Temperature Compensated Internal Schottky
The LTC®5508 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 12dBm
amplifier are combined in a small SC70 package. The ■
Buffered Detector Output
supply voltage range is optimized for operation from a ■
Wide VCC Range of 2.7V to 6V
single lithium-ion cell or 3xNiMH. ■ Low Operating Current: 550µA The RF input voltage is peak detected using an on-chip ■ Low Shutdown Current: <2µA Schottky diode. The detected voltage is buffered and ■ SC70 Package supplied to the VOUT pin. A power saving shutdown mode
U
reduces supply current to less than 2µA.
APPLICATIO S
The LTC5508 operates with input power levels from ■ 802.11a, 802.11b, 802.11g, 802.15 –32dBm to 12dBm. ■ Multimode Mobile Phone Products ■ Optical Data Links , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Wireless Data Modems ■ Wireless and Cable Infrastructure ■ RF Power Alarm ■ Envelope Detector
U TYPICAL APPLICATIO Output Voltage vs RF Input Power
10000 VCC = 3.6V TA = 25°C
300MHz to 7GHz RF Power Detector
33pF LTC5508 6 RF 4 1000 V RF CC V IN CC INPUT 2GHz 7GHz 2 5 100pF 0.1µF GND GND OUTPUT VOLTAGE (mV) 1GHz 6GHz 1 4GHz 3 V OUT DISABLE ENABLE SHDN OUT V V OUT 5508 TA01 100 –32 –28 –24 –20 –16 –12 –8 –4 0 4 8 12 RF INPUT POWER (dBm) 5508 TA02 5508fa 1