The comparator threshold voltage is user-settable, enabling a flexible trip point. LTC5564's output may be latched by asserting a latch-enable pin, permitting a fast capture of a short-duration, single-event signal or a fault condition. Its best-in-class performance enables unprecedented speed in timing measurements, rapid response to fault detection and RF power measurements in microwave systems.     

The LTC5564 can measure RF input signals from -24 dBm to +16 dBm. This dynamic range is provided by a programmable gain output amplifier with four gain settings, which are digitally controlled by two logic input pins that are binary-weighed. Thus improved sensitivity can be achieved when measuring low level signals. Moreover, the output amplifier is bandwidth capable of demodulating the envelope of an RF modulated signal up to 75 MHz. The detector incorporates temperature compensation circuitry, enabling repeatable and stable RF power measurements under varying environmental conditions.     

The LTC5564's speed and frequency capabilities open up a wide range of useful applications, including microwave communications, telemetry, radar detectors, RF power amplifier monitoring and fault detection, automatic level control, test instrumentation and cellular networks.     

The LTC5564 can be powered from a single 3.3 V or 5 V supply. Normal operation draws a nominal current of 44 mA. The device is rated for operation from -40 to 85 degrees C.      

Pricing     

The LTC5564 is offered in a small 3 mm x 3 mm 16-pin QFN package. Pricing starts at $2.90 each in 1,000 piece quantities.      

More information about the LTC5564 RF power detector at www.linear.com/5564  

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