0.8% Accurate Quad UV/OV Positive/Negative Voltage Supervisor Data Sheet ADM12914 FEATURES FUNCTIONAL BLOCK DIAGRAM V CC TIMER Quad undervoltage/overvoltage (UV/OV) positive/negative ADM12914 supervisor VH1 Supervises up to two negative rails TIMER Adjustable UV and OV input thresholds 500mV Industry leading threshold accuracy over the extended temperature range: 0.8% VL1 1 V buffered reference output VH2 UV OV Open-drain and reset outputs UV Adjustable reset timeout with disable option 500mV Outputs guaranteed down to V of 0.9 V CC VL2 Glitch immunity OUTPUT LOGIC 62 A supply current VH3 16-lead QSOP package 500mV Specified from 40C to +125C OV VL3 APPLICATIONS MUX VH4 Server supply monitoring FPGA/DSP core and I/O voltage monitoring LOGIC LATCH/DIS 500mV Telecommunications equipment REF REF Medical equipment VL4 SEL GND Figure 1. The device incorporates an internal shunt regulator that enables GENERAL DESCRIPTION the device to be used in higher voltage systems. This feature The ADM12914 is a quad voltage supervisory IC ideally suited requires a resistor to be placed between the main supply rail and for monitoring multiple rails in a wide range of applications. the V pin to limit the current flow into the V pin at a level CC CC Each monitored rail has two dedicated input pins, VHx and VLx, no greater than 10 mA. The ADM12914 uses the internal shunt which allows each rail to be monitored for both undervoltage regulator to regulate V if the supply line exceeds the absolute CC (UV) and overvoltage (OV) conditions with high threshold maximum ratings. UV accuracy of 0.8%. Common active low undervoltage ( ) and The ADM12914 is available in two models. The ADM12914-1 OV overvoltage ( ) pins are shared by each of the monitored offers a latching overvoltage output that can be cleared by voltage rails. toggling the LATCH input pin. The ADM12914-2 has a disable The ADM12914 includes a 1 V buffered reference output, REF, UV OV pin that can override and disable both the and the that acts as an offset when monitoring a negative voltage. The output signals. three-state SEL pin determines the polarity of the third and The ADM12914 is available in a 16-lead QSOP package. The fourth inputs, that is, it configures the device to monitor device is specified over the extended temperature range of positive or negative supplies. 40C to +125C. Rev. F 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 20092017 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 08265-001ADM12914 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Threshold Accuracy ................................................................... 10 Applications ....................................................................................... 1 Voltage Monitoring Example .................................................... 11 Functional Block Diagram .............................................................. 1 Power-Up and Power-Down ..................................................... 12 General Description ......................................................................... 1 UV OV / Timing Characteristics ............................................... 12 Table of Contents .............................................................................. 2 Timer Capacitor Selection ........................................................ 12 Revision History ............................................................................... 2 UV OV / Output Characteristics ............................................... 13 Specifications ..................................................................................... 3 Glitch Immunity ......................................................................... 13 Absolute Maximum Ratings ............................................................ 4 Undervoltage Lockout (UVLO) ............................................... 13 ESD Caution .................................................................................. 4 Shunt Regulator .......................................................................... 13 Pin Configurations and Function Descriptions ........................... 5 OV Latch (ADM12914-1) ......................................................... 13 Typical Performance Characteristics ............................................. 7 Disable (ADM12914-2) ............................................................. 14 Theory of Operation ........................................................................ 9 Typical Applications ....................................................................... 15 Voltage Supervision ...................................................................... 9 Outline Dimensions ....................................................................... 16 Polarity Configuration ................................................................. 9 Ordering Guide .......................................................................... 16 Monitoring Pin Connections .................................................... 10 REVISION HISTORY 2/2017Rev. E to Rev. F 6/2010Rev. B to Rev. C Change to Figure 25 ....................................................................... 15 Changed V of 1 V to V of 0.9 V in Features Section .............. 1 CC CC 5/2015Rev. D to Rev. E 2/2010Rev. A to Rev. B Changes to OV Latch (ADM12914-1) Section ........................... 13 Changes to Figure 17 and Figure 18 ............................................ 10 Added Figure 23, Renumbered Sequentially .............................. 13 12/2009Rev. 0 to Rev. A Added Table 6, Renumbered Sequentially .................................. 14 Changes to Shunt Regulator Section ............................................ 13 Updated Outline Dimensions ....................................................... 16 9/2009Revision 0: Initial Version 8/2013Rev. C to Rev. D Changes to Figure 17 and Figure 18 ............................................. 10 Deleted UV and OV Rise and Fall Times Section ...................... 13 Changes to Figure 24 and Figure 25 ............................................. 15 Rev. F Page 2 of 16