LTC5505-2

`  Internal Schottky Diode RF Detector with Two Power Ranges:
   LTC5505-1, 28dBm to 18dBm
   LTC5505-2, 32dBm to 12dBm
`  Wide Input Frequency Range: 300MHz to 3GHz
`  Temperature Compensated
`  Buffered Detector Output
`  Wide VCC Range of 2.7V to 6V Allows Direct Connection to Battery
`  Low Operating Current: 0.5mA
`  Low Shutdown Current: <2mA
`  Low Profile (1mm) ThinSOTTM Package

·  Multimode Mobile Phone Products
·  PCS Devices
·  Wireless Data Modems
·  Wireless and Cable Infrastructure
·  RF Power Alarm
·  Envelope Detector

V_CC, V_OUT to GND .............. 0.3V to 6.5V RF Voltage
LTC5505-1 ................................... (V_CC 2.6V) to 7V
LTC5505-2 ................................... (V_CC 1.4V) to 7V
SHDN Voltage to GND ............. 0.3V to (V_CC + 0.3V)
I_VOUT ................................................................ 5mA
Operating Temperature Range (Note 2) . 40to 85
Maximum Junction Temperature ...................... 125
Storage Temperature Range ........... 65 to 150
Lead Temperature (Soldering, 10 sec)............. 300

The LTC®5505-X is an RF power detector for RF applications operating in the 300MHz to 3GHz range. A temperature compensated Schottky diode peak detector and buffer amplifier are combined in a small 5-pin ThinSOT 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 upplied to the VOUT pin. A power saving shutdown mode  reduces supply current to less than 2A.

The LTC5505-1 operates with input power levels from 28dBm to 18dBm. The LTC5505-2 operates with input power levels from 32dBm to 12dBm.