DC to 6 GHz, ≤45 dB Envelope Threshold Detector/Trigger

The ADL5910 is a radio frequency (RF) detector that operates from dc to 6 GHz. It provides a programmable envelope threshold detection function.

The envelope threshold detection function compares the voltage from an internal envelope detector with a user defined input voltage. When the voltage from the envelope detector exceeds the user defined threshold voltage, an internal comparator captures and latches the event to a set or reset (SR) flip flop. The response time from the RF input signal exceeding the user programmed threshold to the output latching is 12 ns. The latched event is held on the flip flop until a reset pulse is applied.

The RF input of the ADL5910 is dc-coupled, allowing operation down to arbitrarily low ac frequencies. It operates on a 3.3 V supply and consumes 3.5 mA. Power-down mode reduces this current to 100 μA when a logic low is applied to the ENBL pin.

The ADL5910 is supplied in a 3 mm × 3 mm, 16-lead LFCSP for operation over the wide temperature range of −40°C to +105°C.

Applications

* Wireless power amplifier input and output protection

* Wireless receiver input protection

* RF pulse detection and triggering

* Envelope threshold detection and latching

* Broad input frequency range: dc to 6 GHz

* ±1.0 dB input range: ≤45 dB

* ±1.0 dB input level: −30 dBm to +15 dBm at 100 MHz

* Programmable threshold and latch reset function

* Propagation delay: 12 ns typical from RFIN to Q/Q latch

* All functions temperature and supply stable

* Operates at 3.3 V from −40°C to +105°C

* Quiescent current: 3.5 mA typical

* Power-down current: 100 μA typical

* 16-lead, 3 mm × 3 mm LFCSP package