Ultralow Power Voltage Detector Data Sheet ADM8641/ADM8642 FEATURES FUNCTIONAL BLOCK DIAGRAMS VCC Ultralow power consumption with I = 92 nA (typical) CC Precision, low voltage monitoring ADM8641 Pretrimmed voltage monitoring threshold options 10 options from 2 V to 4.63 V for the ADM8641 DIS 20 options from 0.5 V to 1.9 V for the ADM8642 OUT 1.3% threshold accuracy over full temperature range V TH Output disable input 23 s to 26 s typical propagation delay Open-drain type output GND Power supply glitch immunity Figure 1. ADM8641 Functional Block Diagram Available in a 1.46 mm 0.96 mm WLCSP VCC Operational temperature range: 40C to +85C ADM8642 APPLICATIONS Portable/battery-operated equipment DIS Microprocessor systems OUT VIN Energy metering V TH Energy harvesting GND Figure 2. ADM8642 Functional Block Diagram GENERAL DESCRIPTION The ADM8641 and ADM8642 are simple voltage detectors released for sale as standard models. See the Ordering Guide suitable for use in general-purpose applications. The ultralow section for full information. power consumption of these devices makes them suitable for The ADM8641 monitors the voltage using the VCC pin. The power efficiency sensitive systems, such as battery-powered separate supply pin on the ADM8642 allows it to have a lower portable devices and energy meters. detection threshold down to 0.5 V. The factory preset detection thresholds from 0.5 V to 4.63 V The ADM8641 and ADM8642 are available in a 6-ball, 1.46 mm with 1.2% accuracy over the full temperature range enable the 0.96 mm WLCSP. These devices are specified over the 40C to devices to monitor the node of interest accurately with direct +85C temperature range. DIS contact. The input lets the user hold the output low regardless of the state of the input. Not all device options are Rev. D 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. Tel: 781.329.4700 20152021 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. 12781-002 12781-001ADM8641/ADM8642 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation .........................................................................9 Applications ...................................................................................... 1 Voltage Monitoring Input ...........................................................9 Functional Block Diagrams ............................................................. 1 VIN as an Adjustable Input .........................................................9 General Description ......................................................................... 1 Transient Immunity .....................................................................9 Revision History ............................................................................... 2 Output .............................................................................................9 Specifications .................................................................................... 3 Disable Input .................................................................................9 Absolute Maximum Ratings ........................................................... 5 Device Model Options ................................................................... 10 Thermal Resistance ...................................................................... 5 Outline Dimensions ....................................................................... 11 ESD Caution.................................................................................. 5 Ordering Guide .......................................................................... 11 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 5/2021Rev. C to Rev. D 1/2016Rev. A to Rev. B Added VCC Slew Rate Consideration Section ............................. 9 Changes to Ordering Guide .......................................................... 11 1/2018Rev. B to Rev. C 4/2015Rev. 0 to Rev. A Changes to General Description .................................................... 1 Changes to Threshold Hysteresis Parameter, Table 1 ................. 3 Added Note 1 to Table 1 .................................................................. 3 Changed Out Output Parameter, Table 1 to Out Pin Output 1/2015Revision 0: Initial Version Parameter, Table 1, DIS Input Parameter, Table 1 to DIS Pin Input Parameter, Table 1 .................................................................. 4 Changed Device Options Section to Device Model Options Section .............................................................................................. 10 Changes to Device Model Options Section ................................ 10 Changes to Ordering Guide .......................................................... 11 Rev. D Page 2 of 11