Ultralow Power Supervisory ICs with Watchdog Timer and Manual Reset Data Sheet ADM8611/ADM8612/ADM8613/ADM8614/ADM8615 FEATURES FUNCTIONAL BLOCK DIAGRAMS VCC Ultralow power consumption with I = 92 nA (typical) CC ADM8612 Continuous monitoring with no blank time Pretrimmed voltage monitoring threshold options RESET VIN RESET 10 options from 2 V to 4.63 V for the ADM8611 GENERATOR V TH 20 options from 0.5 V to 1.9 V for the ADM8612/ADM8615 5 options from 2.32 V to 4.63 V for the ADM8613/ADM8614 1.3% threshold accuracy over full temperature range MR DEBOUNCE Manual reset input (ADM8611/ADM8612/ADM8613/ADM8615) GND 200 ms (typical) reset timeout Figure 1. ADM8612 Functional Block Diagram Low voltage input monitoring down to 0.5 V (ADM8612/ VCC ADM8615) ADM8614 Watchdog timer (ADM8613/ADM8614/ADM8615) RESET Watchdog function disable input (ADM8613/ADM8614 only) RESET GENERATOR Watchdog timeout extension input (ADM8614 only) V TH Active low, open-drain RESET output WATCHDOG Power supply glitch immunity WDI DETECTOR Available in a 1.46 mm 0.96 mm WLCSP Operational temperature range: 40C to +85C GND WD DIS WDT SEL APPLICATIONS Figure 2. ADM8614 Functional Block Diagram Portable/battery-operated equipment Microprocessor systems Energy metering Energy harvesting GENERAL DESCRIPTION The ADM8611/ADM8612/ADM8613/ADM8614/ADM8615 both the ADM8613 and ADM8614. A separate supply input are voltage supervisory circuits that monitor power supply voltage allows the ADM8612 and ADM8615 to monitor 20 different levels and code execution integrity in microprocessor-based low voltage levels from 0.5 V to 1.9 V. Not all device options are systems. Apart from providing power-on reset signals, an on- available as standard models. See the Ordering Guide for details. chip watchdog timer can reset the microprocessor if it fails to The ADM8611, ADM8612, ADM8613, and ADM8615 can strobe within a preset timeout period. A reset signal can also be reset on demand through the manual reset input. The watchdog asserted by an external push-button through a manual reset input. function on the ADM8613, ADM8614, and ADM8615 monitors The ultralow power consumption of these devices makes them the heartbeat of the microprocessor through the WDI pin. The suitable for power efficiency sensitive systems, such as battery- ADM8613 and ADM8614 have a watchdog disable input, which powered portable devices and energy meters. allows the user to disable the watchdog function, if required. The ADM8614 also has a watchdog timeout extension input, allowing The features of each member of the device family are shown in the watchdog timeout to be extended from 1.6 sec to 100 sec. Table 9. Each device subdivides into submodels with differences in factory preset voltage monitoring threshold options. In the The ADM8611/ADM8612/ADM8613/ADM8614/ADM8615 range of 2 V to 4.63 V, 10 options are available for the ADM8611. are available in a 6-ball, 1.46 mm 0.96 mm WLCSP. These In the range of 2.32 V to 4.63 V, five options are available for devices are specified over the temperature range of 40C to +85C. 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. 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Technical Support www.analog.com 12782-001 12782-002ADM8611/ADM8612/ADM8613/ADM8614/ADM8615 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Voltage Monitoring Input.......................................................... 12 Applications ....................................................................................... 1 VIN as an Adjustable Input ....................................................... 12 Functional Block Diagrams ............................................................. 1 Transient Immunity ................................................................... 12 General Description ......................................................................... 1 Reset Output ............................................................................... 12 Revision History ............................................................................... 2 Manual Reset Input .................................................................... 13 Specifications ..................................................................................... 3 Watchdog Timer ......................................................................... 13 Absolute Maximum Ratings ............................................................ 5 Watchdog Timeout Select Input ............................................... 13 Thermal Resistance ...................................................................... 5 Typical Application Circuits ..................................................... 13 ESD Caution .................................................................................. 5 Low Power Design Techinques ................................................. 14 Pin Configurations and Function Descriptions ........................... 6 Device Options ............................................................................... 15 Typical Performance Characteristics ............................................. 9 Outline Dimensions ....................................................................... 17 Theory of Operation ...................................................................... 12 Ordering Guide .......................................................................... 17 REVISION HISTORY 2/2018Rev. E to Rev. F 5/2016Rev. B to Rev. C Changes to General Description Section ...................................... 1 Changes to MR Pull-Up Resistance Parameter, Table 1 ............... 4 Added Note 1, Table 1 ...................................................................... 4 Changed Device Options Section to Model Options Section ...... 15 12/2015Rev. A to Rev. B Changes to Model Options Section.............................................. 15 Changes to Watchdog Timeout Period Parameter, Table 1 ......... 4 Added Table 15 Renumbered Sequentially ................................ 16 Changes to Ordering Guide .......................................................... 17 Changes to Ordering Guide .......................................................... 17 4/2015Rev. 0 to Rev. A 12/2017Rev. D to Rev. E Changes to Reset Threshold Hysteresis Parameter, Table 1 ........ 3 Changes to Ordering Guide .......................................................... 17 1/2015Revision 0: Initial Version 2/2017Rev. C to Rev. D Changes to Ordering Guide .......................................................... 17 Rev. F Page 2 of 17