Analog Devices LTC5531 Product Info

• 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 V_OUT Offset Control
• Wide V_CC Range of 2.7V to 6V
• Low Operating Current: 500µA
• Low Shutdown Current: <2µA
• Available in a Low Profile (1mm) SOT-23 Package

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 V_OUT 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 V_OS 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.

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