Ultralow Power Supervisory ICs with

Watchdog Timer and Manual Reset

Data Sheet

ADM8611/ADM8612/ADM8613/ADM8614/ADM8615

Rev. G

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

©2015–2021 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

FEATURES

Continuous monitoring with no blank time

Pretrimmed voltage monitoring threshold options

10 options from 2 V to 4.63 V for the ADM8611

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

Manual reset input (ADM8611/ADM8612/ADM8613/ADM8615)

200 ms (typical) reset timeout

Low voltage input monitoring down to 0.5 V (ADM8612/

ADM8615)

Watchdog timer (ADM8613/ADM8614/ADM8615)

Watchdog function disable input (ADM8613/ADM8614 only)

Watchdog timeout extension input (ADM8614 only)

Power supply glitch immunity

Available in a 1.46 mm × 0.96 mm WLCSP

Operational temperature range: −40°C to +85°C

APPLICATIONS

Portable/battery-operated equipment

Microprocessor systems

Energy metering

Energy harvesting

FUNCTIONAL BLOCK DIAGRAMS

Figure 1. ADM8612 Functional Block Diagram

Figure 2. ADM8614 Functional Block Diagram

GENERAL DESCRIPTION

The ADM8611/ADM8612/ADM8613/ADM8614/ADM8615

are voltage supervisory circuits that monitor power supply voltage

levels and code execution integrity in microprocessor-based

systems. Apart from providing power-on reset signals, an on-

chip watchdog timer can reset the microprocessor if it fails to

strobe within a preset timeout period. A reset signal can also be

asserted by an external push-button through a manual reset input.

The ultralow power consumption of these devices makes them

suitable for power efficiency sensitive systems, such as battery-

powered portable devices and energy meters.

The features of each member of the device family are shown in

Table 9. Each device subdivides into submodels with differences

in factory preset voltage monitoring threshold options. In the

range of 2 V to 4.63 V, 10 options are available for the ADM8611.

In the range of 2.32 V to 4.63 V, five options are available for

both the ADM8613 and ADM8614. A separate supply input

allows the ADM8612 and ADM8615 to monitor 20 different

low voltage levels from 0.5 V to 1.9 V. Not all device options are

available as standard models. See the Ordering Guide for details.

The ADM8611, ADM8612, ADM8613, and ADM8615 can

reset on demand through the manual reset input. The watchdog

function on the ADM8613, ADM8614, and ADM8615 monitors

the heartbeat of the microprocessor through the WDI pin. The

ADM8613 and ADM8614 have a watchdog disable input, which

allows the user to disable the watchdog function, if required. The

ADM8614 also has a watchdog timeout extension input, allowing

the watchdog timeout to be extended from 1.6 sec to 100 sec.

The ADM8611/ADM8612/ADM8613/ADM8614/ADM8615

are available in a 6-ball, 1.46 mm × 0.96 mm WLCSP. These

devices are specified over the temperature range of −40°C to +85°C.

MR

VCC

VIN

GND

ADM8612

RESET

GENERATOR

DEBOUNCE

RESET

GND

WDT_SEL

WD_DIS

WDI

VCC

ADM8614

RESET

GENERATOR

RESET

WATCHDOG

DETECTOR