DC to 6 GHz, 45 dB TruPwr Detector with Envelope Threshold Detection Data Sheet ADL5904 FEATURES FUNCTIONAL BLOCK DIAGRAM VPOS VIN RST ENBL RMS and envelope threshold detection 4 5 7 16 15 Broad input frequency range: dc to 6 GHz ADL5904 RF input range: 45 dB (30 dBm to +15 dBm) R Q 12 Q RMS linear in decibel output, scaled 36.5 mV/dB Q 13 Q S + Input envelope threshold detection and latching Programmable threshold and latch reset function ENVELOPE RFIN 1 RMS 10 VRMS DETECTOR Fast response time: 12 ns from RFIN to Q/Q latch All functions temperature and supply stable 11 3 9 4 2 6 8 Operates at 3.3 V from 40C to +105C GND VCAL CRMS DECL DNC Low power: 3.5 mA Figure 1. Power-down capability to 100 A 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 GENERAL DESCRIPTION The ADL5904 is a dual-function radio frequency (RF) TruPwr the user defined threshold voltage, an internal comparator detector that operates from dc to 6 GHz. It provides rms power captures and latches the event to a set/reset (SR) flip flop. The measurement along with a programmable envelope threshold response time from the RF input signal exceeding the user detection function. 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 rms power measurement function has a 45 dB detection range, nominally from 30 dBm to +15 dBm. The rms power The RF input of the ADL5904 is dc-coupled, allowing operation measurement function features low power consumption and an down to arbitrarily low ac frequencies. It operates on a 3.3 V intrinsically ripple free error transfer function. supply and consumes 3.5 mA. A disable mode reduces this current to 100 A when a logic low is applied to the ENBL pin. The envelope threshold detection function compares the voltage from an internal envelope detector with a user defined input The ADL5904 is supplied in a 3 mm 3 mm, 16-lead LFCSP for voltage. When the voltage from the envelope detector exceeds operation over the wide temperature range of 40C to +105C. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20162017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 13838-001ADL5904 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 18 Applications ....................................................................................... 1 Basic Connections for RMS Measurement ............................. 18 Functional Block Diagram .............................................................. 1 Choosing a Value for CRMS ......................................................... 19 General Description ......................................................................... 1 VRMS Calibration and Error Calculation .............................. 20 Revision History ............................................................................... 2 Basic Connections for Threshold Detection .......................... 21 Specifications ..................................................................................... 3 Q Q and Response Time ........................................................... 21 Absolute Maximum Ratings ............................................................ 8 Setting the V Threshold Detection Voltage ........................ 22 IN ESD Caution .................................................................................. 8 Evaluation Board Schematic and Configuration Options ........ 25 Pin Configuration and Function Descriptions ............................. 9 Outline Dimensions ....................................................................... 27 Typical Performance Characteristics ........................................... 10 Ordering Guide .......................................................................... 27 Test Circuits ..................................................................................... 17 REVISION HISTORY 7/2017Rev. A to Rev. B 5/2017Rev. 0 to Rev. A Changes to Basic Connection for RMS Measurement Section Changes to Ordering Guide .......................................................... 27 and Figure 44 ................................................................................... 18 Change to Figure 54 ....................................................................... 25 10/2016Revision 0: Initial Version Change to C14 Default Value, Table 7 ......................................... 26 Rev. B Page 2 of 27