UltraFast 7ns Response Time 15GHz RF Power Detector with Comparator

The LTC5564 is a precision, RF power detector for applications in the 600MHz to 15GHz frequency range. The LTC5564 operates with input power levels from –24dBm to 16dBm.

A temperature compensated Schottky diode peak detector, gain-selectable operational amplifier, and fast comparator are combined in a small 16-lead 3mm × 3mm QFN package.

The RF input signal is peak detected and then sensed by both a comparator and amplifier. The comparator provides a 9ns response time to input levels exceeding VREF along with a latch enable/disable function. The gain selectable operational amplifier provides a 350V/μs slew rate and 75MHz of demodulation bandwidth to the analog output.

VOUTADJ and VREF pins allow for the adjustment of VOUT offset and VCOMP switch point voltages, respectively.

Applications

* RF Signal Presence Detectors for: 802.11a, 802.11b, 802.11g, 802.15, Optical Data Links, Wireless Data Modems, Wireless and Cable Infrastructure

* 5.8GHz ISM Band Radios

* MMDS Microwave Links

* PA Power Supply Envelope Tracking Control

* Fast Alarm

* RF Power Monitor

* Envelope Detector

* Ultra-Wideband Radio

* Radar Detector

* Temperature Compensated Schottky RF Peak Detector

* Wide Input Frequency Range: 600MHz to 15GHz†

* Wide Input Power Range: –24dBm to 16dBm

* 7ns Typical Response Time

* 75MHz Demodulation Bandwidth

* Programmable Gain Settings for Improved Sensitivity

* Adjustable Amplifier Output Offset Voltage

* High Speed Comparator with Latch Enable: 9ns Typical Response Time

* 16-Lead 3mm × 3mm QFN Package

* Temperature Range: –40°C to 125°C