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LTC5532 - Precision 300MHz to 7GHz RF Detector with Gain and Offset Adjustment

The LTC5532 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 or (2mm x 2mm) DFN package. The supply voltage range is optimized for operation from a single lithium-ion cell or 3x NiMH.

The RF input voltage is peak detected using an on-chip Schottky diode. The detected voltage is buffered and supplied to the VOUT pin.

The LTC5532 output buffer gain is set via external resistors. The initial starting voltage of 120mV ±35mV can be precisely adjusted using the VOS pin.

The LTC5532 operates with RF input power levels from –32dBm to 10dBm

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 with External Gain Control Precision VOUT Offset Control Low Starting Voltage: 120mV ±35mV for Gain = 2x Wide VCC Range of 2.7V to 6V Low Operating Current: 500µA Available in a Low Profile (1mm) SOT-23 Package and Tiny 6-Lead (2mm x 2mm) DFN Package Typical Application

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 Packaging

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