Linear Technology LTC5564 precision RF power detector

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Linear Technology has introduced the LTC5564, a precision RF power detector that operates from 600 MHz to 15 GHz, with a response time of 7 ns from a pulsed RF signal.

The device has an on-chip fast comparator with a propagation delay of 9 ns. The comparator threshold voltage is user settable, enabling a flexible trip point. The device'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 performance enables speed in timing measurements, rapid response to fault detection and RF power measurements in microwave systems.

The device can measure RF input signals from -24 to +16 dBm. This range is provided by a programmable gain output amplifier with four gain settings, that are digitally controlled by two logic input pins that are binary weighed. Thus, improved sensitivity can be achieved when measuring low-level signals.

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 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 mobile networks.

It can be powered from a single 3.3 or 5 V supply. Normal operation draws a nominal current of 44 mA.