DESCRIPTION
The LTC®5564 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.

FEATURES
■ 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 Amplifer 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

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
■ Envelope Detector
■ Ultra-Wideband Radio
■ Radar Detector