The high response time of the LTC5564H enables numerous new RF and microwave applications that cannot be supported by devices with slow response times. This product supports envelope tracking and spectrum analysis by detecting desired signals, such as high-speed radar pulses, and precisely adjusting RF power amplifier power levels. Additionally, the device can detect unwanted signals, such as radio signals that can enable RF PA overdrive, error conditions, and jamming. The device's high-temperature performance increases usability and durability, making it suitable for applications operating in harsh environments, such as high-power PA amplifiers that operate inefficiently at high temperatures—including cellular towers, automotive engines, spacecraft, and wireless infrastructure equipment exposed to extreme temperatures.

The LTC5564H accurately measures RF input signal levels ranging from –24dBm to 16dBm. This device features a programmable gain output amplifier with four gain settings that are digitally controlled via two binary-weighted logic input pins. This feature ensures improved sensitivity when measuring low-level signals. In addition, the output amplifier has a bandwidth capable of demodulating the envelope of an RF modulated signal of up to 75 MHz.

The LTC5564H's fast on-chip comparator threshold voltage is user-configurable, allowing for flexible trip point detection at specific RF power levels. The product's output can be latched via a latch-enabled input, enabling rapid capture of short durations, single-event signals, or error conditions. Its industry-leading performance delivers unparalleled timing measurement speeds and rapid response for error detection and RF power measurement in RF/PA and microwave systems operating in harsh environments.

The LTC5564H can be powered by a single 3.3V or 5V power supply. Typical operation consumes 44mA of current. The H-rated device is configured for an operating temperature range of –40°C to 125°C and has undergone 100% testing across this range. The LTC5564H is available for $3.44 per unit in 1,000-piece quantities and is immediately available for mass production. The industrial grade guarantees operation over a range of –40°C to 105°C. The LTC5564H is supplied in a small 3mm x 3mm 16-pin QFN package. For more information, please refer to www.linear.com/product/LTC5564.

Photo Caption: Ultra-fast 15GHz RF power detector supporting 125°C operation

Product Features: LTC5564H

• Operating frequency range 600MHz ~ 15GHz

• Operating temperature (Case) –40°C ~ 125°C

• Ultra-fast detection response time 7ns

• On-chip high-speed comparator 9ns

•n class="Apple-tab-span" style="white-space:pre"> Dynamic range 40dB

• RF input power range –24dBm ~ 16dBm

• small package 3mm x 3mm QFN