Analog Devices LTC5509 Product Info

• Temperature Compensated Internal Schottky Diode RF Detector
• Wide Input Frequency Range: 300MHz to 3GHz
• Wide Input Power Range: –30dBm to 6dBm
• Buffered Detector Output
• Wide V_CC Range of 2.7V to 6V
• Low Operating Current: 600µA
• Low Shutdown Current: <2µA
• SC70 Package

The LTC5509 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 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 V_OUT pin without gain compression. Consequently, the output voltage is linearly proportional to the RF input voltage. A power saving shutdown mode reduces supply current to less than 2µA.

The LTC5509 operates with input power levels from –30dBm to 6dBm.

Applications

• Multimode Mobile Phone Products
• Optical Data Links
• Wireless Data Modems
• Wireless and Cable Infrastructure
• RF Power Alarm
• Envelope Detector