ADL5904

Data Sheet DC to 6 GHz, 45 dB TruPwr Detector with Envelope Threshold Detection ADL5904 FEATURES RMS and envelope threshold detection Broad input frequency range: dc to 6 GHz RF input range: 45 dB (−30 dBm to +15 dBm) RMS linear in decibel output, scaled 36.5 mV/dB Input envelope threshold detection and latching Programmable threshold and latch reset function Fast response time: 12 ns from RFIN to Q/Q latch All functions temperature and supply stable Operates at 3.3 V from −40°C to +105°C Low power: 3.5 mA Power-down capability to 100 µA 16-lead, 3 mm × 3 mm LFCSP package APPLICATIONS Transmitter signal strength indication (TSSI) Wireless power amplifier input and output protection Wireless receiver input protection FUNCTIONAL BLOCK DIAGRAM ENBL 4 VPOS 57 VIN– 16 RST 15 ADL5904 – R Q 12 Q S Q 13 Q + RFIN 1 ENVELOPE DETECTOR RMS 10 VRMS 11 GND 3 VCAL 9 CRMS Figure 1. 4 DECL 26 8 DNC 13838-001 GENERAL DESCRIPTION The ADL5904 is a dual-function radio frequency (RF) TruPwr™ detector that operates from dc to 6 GHz. It provides rms power measurement along with a programmable envelope threshold detection function. The rms power measurement function has a 45 dB detection range, nominally from −30 dBm to +15 dBm. The rms power measurement function features low power consumption and an intrinsically ripple free error transfer function. The envelope threshold detection function compares the voltage from an internal envelope detector with a user defined input voltage....