Analog Devices LTC5533 Product Info

• 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 V_OUT Starting Voltage
• Wide V_CC Range of 2.7V to 6V
• Low Operating Current: <500µA/Channel
• Low Shutdown Current: <2µA/Channel
• 4mm × 3mm DFN Package

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 V_OUT pins. A power saving shutdown mode reduces current to less than 2µA/channel. The initial output starting voltages can be precisely adjusted using the V_OS 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