300MHz to 7GHz RF Power Detector with Buffered Output in SC70 Package

The LTC5508 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 SC70 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 Vout pin. A power saving shutdown mode reduces supply current to less than 2µA.

The LTC5508 operates with input power levels from –32dBm to 12dBm.

Applications

* 802.11a, 802.11b, 802.11g, 802.15

* Multimode Mobile Phone Products

* Optical Data Links

* Wireless Data Modems

* Wireless and Cable Infrastructure

* RF Power Alarm

* Envelope Detector

* Temperature Compensated Internal Schottky Diode RF Detector

* Wide Input Frequency Range: 300MHz to 7GHz

* Wide Input Power Range: –32dBm to 12dBm

* Buffered Detector Output

* Wide VCC Range of 2.7V to 6V

* Low Operating Current: 550µA

* Low Shutdown Current: <2µA

* SC70Package