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PDF ADM8611 Data sheet ( Hoja de datos )
| Número de pieza | ADM8611 | |
| Descripción | Ultralow Power Supervisory IC | |
| Fabricantes | Analog Devices | |
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Data Sheet
Ultralow Power Supervisory ICs with
Watchdog Timer and Manual Reset
ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
FEATURES
Ultralow power consumption with ICC = 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
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
FUNCTIONAL BLOCK DIAGRAMS
VCC
VIN
VTH
ADM8612
RESET
GENERATOR
RESET
MR DEBOUNCE
GND
Figure 1. ADM8612 Functional Block Diagram
VCC
ADM8614
RESET
RESET
VTH GENERATOR
WDI
WATCHDOG
DETECTOR
GND
WD_DIS WDT_SEL
Figure 2. ADM8614 Functional Block Diagram
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.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
1 page  
Data Sheet
ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
VCC
WD_DIS
RESET
VIN
MR
WDI
WDT_SEL
Input/Output Current
Storage Temperature Range
Operating Temperature Range
Rating
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to VCC + 0.3 V
−0.3 V to VCC + 0.3 V
−0.3 V to VCC + 0.3 V
10 mA
−40°C to +150°C
−40°C to +85°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL RESISTANCE
θJA is specified for a device soldered on an FR4 board with a
minimum footprint.
Table 3.
Package Type
6-Ball WLCSP
θJA
105.6
Unit
°C/W
ESD CAUTION
Rev. D | Page 5 of 17
5 Page 
Data Sheet
ADM8611/ADM8612/ADM8613/ADM8614/ADM8615
0.50
0.45
RPULLUP = 10kΩ
RPULLUP = 100kΩ
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0 0.5 1.0 1.5 2.0 2.5 3.0
VCC (V)
Figure 20. RESET Pin Voltage vs. Voltage on VCC
(with the RESET Pin Pulled Up to the VCC Pin Through RPULLUP)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
VCC = 0.9V
0.2
VCC = 1.2V
VCC = 2.5V
0 VCC = 4.25V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
ISINK (mA)
Figure 21. RESET Output Low Voltage (VRST_OL) vs. Sink Current (ISINK)
Figure 22. RESET Timeout Delay With VCC and VIN Rising
Figure 23. RESET Timeout Delay With VCC and VIN Falling
Rev. D | Page 11 of 17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ADM8611.PDF ] | |
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