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ADM8614Y263ACBZ-R7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
Ultralow Power Supervisory ICs with
Watchdog Timer and Manual Reset
Data Sheet
ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2017 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Ultralow power consumption with I
CC
= 92 nA (typical)
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)
Active low, open-drain
RESET
output
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.
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
V
CC
VIN
GND
V
TH
ADM8612
RESET
GENERATOR
DEBOUNCE
RESET
12782-001
GND
WDT_SELWD_DIS
W
DI
V
CC
V
TH
ADM8614
RESET
GENERATOR
RESET
WATCHDOG
DETECTOR
12782-002
ADM8611/ADM8612/ADM8613/ADM8614/ADM8615 Data Sheet
Rev. D | Page 2 of 17
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 12
Voltage Monitoring Input .......................................................... 12
VIN as an Adjustable Input ....................................................... 12
Transient Immunity ................................................................... 12
Reset Output ............................................................................... 12
Manual Reset Input .................................................................... 13
Watchdog Timer ......................................................................... 13
Watchdog Timeout Select Input ............................................... 13
Typical Application Circuits ..................................................... 13
Low Power Design Techinques ................................................. 14
Device Options ............................................................................... 15
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 17
REVISION HISTORY
2/2017
—Rev. C to Rev. D
C
hanges to Ordering Guide .......................................................... 17
5/
2016—Rev. B to Rev. C
Changes to
MR
Pull-Up Resistance Parameter, Table 1 .............. 4
12/2015—Re
v. A to Rev. B
Changes to Watchdog Timeout Period Parameter, Table 1 ........ 4
Changes to Ordering Guide .......................................................... 17
4/2015
—Rev. 0 to Rev. A
Changes to Reset Threshold Hysteresis Parameter, Table 1 ........ 3
1/2015—Revision 0: Initial Version
Data Sheet ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
Rev. D | Page 3 of 17
SPECIFICATIONS
V
CC
= 2 V to 5.5 V, V
IN
< V
CC
+ 0.3 V, T
A
= −40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
OPERATING VOLTAGE RANGE V
CC
ADM8611, ADM8613, ADM8614 0.9 5.5 V Guarantees valid
RESET
output
ADM8612, ADM8615 2 5.5 V Guarantees valid
RESET
output
0.9 V Guarantees
RESET
output low
UNDERVOLTAGE LOCKOUT (ADM8612,
ADM8615)
Input Voltage Rising UVLO
RISE
1.95 V
Input Voltage Falling UVLO
FAL L
1.6 V
Hysteresis UVLO
HYS
90 mV
INPUT CURRENT
VCC Quiescent Current I
CC
92 190 nA V
CC
= 2 V to 5.5 V,
RESET
deasserts,
V
WDI
= V
CC
110
nA
CC
RESET
V
WDI
= V
CC
, T
A
= 25°C
VIN Average Input Current 4 8.5 nA V
IN
= 2 V, V
CC
= 5.5 V
4 32 nA V
IN
= 2 V, V
CC
= 2 V
RESET THRESHOLD VOLTAGE V
TH
Input falling
ADM8611, ADM8613, ADM8614 V
TH
− 1.3% V
TH
V
TH
+ 1.3% V See Table 10 and Table 12
ADM8612, ADM8615 V
TH
− 1.3% V
TH
V
TH
+ 1.3% V V
TH
≥ 1.2 V, see Table 11
V
TH
− 1.4% 1.1 V
TH
+ 1.4% V 1.1 V threshold option
V
TH
− 1.6%
1
V
TH
+ 1.6%
V
V
TH
− 1.6% 0.95 V
TH
+ 1.6% V 0.95 V threshold option
V
TH
− 1.7% 0.9 V
TH
+ 1.7% V 0.9 V threshold option
V
TH
− 1.8% 0.85 V
TH
+ 1.8% V 0.85 V threshold option
V
TH
− 1.8% 0.8 V
TH
+ 1.8% V 0.8 V threshold option
V
TH
− 1.9% 0.75 V
TH
+ 1.9% V 0.75 V threshold option
V
TH
− 1.9% 0.7 V
TH
+ 1.9% V 0.7 V threshold option
V
TH
− 2.0% 0.65 V
TH
+ 2.0% V 0.65 V threshold option
V
TH
− 2.1% 0.6 V
TH
+ 2.1% V 0.6 V threshold option
V
TH
− 2.1% 0.55 V
TH
+ 2.1% V 0.55 V threshold option
V
TH
− 2.2% 0.5 V
TH
+ 2.2% V 0.5 V threshold option
RESET THRESHOLD HYSTERESIS V
HYST
ADM8611, ADM8613, ADM8614 0.9% × V
TH
V
ADM8612, ADM8615 0.9% × V
TH
V V
TH
> 1 V
10.3
mV
TH
RESET
TIMEOUT PERIOD t
RP
170 200 240 ms
PROPAGATION DELAY
VCC to
RESET
t
PD_VCC
ADM8611, ADM8613, ADM8614 18 26 37 µs V
CC
falling with V
TH
× 10% overdrive
VIN to
RESET
t
PD_VIN
ADM8612, ADM8615
13.5
23
35
µs
IN
TH
INPUT GLITCH REJECTION
VCC Glitch Rejection
t
GR_VCC
ADM8611, ADM8613, ADM8614 13.5 23 32 µs V
CC
falling, with V
TH
× 10% overdrive
VIN Glitch Rejection t
GR_VIN
ADM8612, ADM8615 13.5 21 27 µs V
IN
falling with V
TH
× 10% overdrive
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

ADM8614Y263ACBZ-R7

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Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits IC,Watchdog,WD_DIS,WDT_SEL ULP Supv Ckt
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