300MHz to 11GHz Precision Dual RF Power Detector

The LTC5533 is a dual channel RF power detector for RF applications operating in the 300MHz to 11GHz range. Two independent temperature compensated Schottky diode peak detectors and buffer amplifiers are combined in a small 4mm × 3mm DFN package.

The RF input voltage is peak detected using on-chip Schottky diodes. The detected voltage is buffered and supplied to the VOUT pins. A power saving shutdown mode reduces current to less than 2µA/channel. The initial output starting voltages can be precisely adjusted using the VOS pins.

The LTC5533 operates with input power levels from -32dBm to 12dBm.

*Higher frequency operation is achievable with reduced performance. Consult factory for more information.

Applications

* PA Forward and Reverse Power Monitor

* Dual PA Transmit Power Control

* 802.11a, b, g, 802.15, WiMAX

* PA Linearization

* Fixed Wireless Access

* RF Power Alarm

* Envelope Detector

* Two Independent Temperature Compensated Schottky Diode RF Peak Detectors

* 45dB Channel-to-Channel Isolation at 2GHz

* Wide Input Frequency Range: 300MHz to 11GHz*

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

* Buffered Detector Outputs with Gain of 2x

* Adjustable VOUT Starting Voltage

* Wide VCC Range of 2.7V to 6V

* Low Operating Current: <500µA/Channel

* Low Shutdown Current: <2µA/Channel

* 4mm × 3mm DFN Package