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LTC5531 - Precision 300MHz to 7GHz RF Detector with Shutdown and Offset Adjustment

The LTC5531 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 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 supplied to the VOUT pin. A power saving shutdown mode reduces current to less than 2µA. The initial offset voltage of 120mV ±35mV can be precisely adjusted using the VOS pin.

The LTC5531 operates with input power levels from –32dBm to 10dBm.

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

Features Temperature Compensated Internal Schottky Diode RF Detector Wide Input Frequency Range: 300MHz to 7GHz* Wide Input Power Range: –32dBm to 10dBm Buffered Detector Output Precision VOUT Offset Control Wide VCC Range of 2.7V to 6V Low Operating Current: 500µA Low Shutdown Current: <2µA Available in a Low Profile (1mm) SOT-23 Package Typical Application

Applications 802.11a, 802.11b, 802.11g, 802.15, 802.16 Multimode Mobile Phone Products Optical Data Links Wireless Data Modems Wireless and Cable Infrastructure RF Power Alarm Envelope Detector Packaging

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