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ADM811 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM811
Description  Microprocessors Supervisory Circuit in 4-Lead SOT-143
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM811 Datasheet(HTML) 1 Page - Analog Devices

   
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Microprocessor Supervisory
Circuit in 4-Lead SOT-143 with DSP
Data Sheet
ADM811/ADM812
Rev. G
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Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Superior upgrade for MAX811/MAX812
Specified over temperature
Low power consumption: 5 µA typical
Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options
Reset assertion down to 1 VCC
Power-on reset: 140 ms minimum
Logic low RESET output (ADM811)
Logic high RESET output (ADM812)
Built-in manual reset
APPLICATIONS
Microprocessor systems
Controllers
Intelligent instruments
Automotive systems
Safety systems
Portable instruments
FUNCTIONAL BLOCK DIAGRAM
RESET
GENERATOR
DEBOUNCE
VREF
RESET/RESET
GND
VCC
MR
ADM811/ADM812
Figure 1.
GENERAL DESCRIPTION
The ADM811/ADM812 are reliable voltage monitoring devices
suitable for use in most voltage monitoring applications. The
ADM811/ADM812 are designed to monitor six different
voltages, each allowing a 5% or 10% degradation of standard
PSU voltages before a reset occurs. These voltages have been
selected for the effective monitoring of 2.5 V, 3 V, 3.3 V, and 5 V
supply voltage levels.
Included in this circuit is a debounced manual reset input.
Reset can be activated using an electrical switch (or an input
from another digital device) or by a degradation of the supply
voltage. The manual reset function is very useful, especially if
the circuit in which the ADM811/ADM812 are operating enters
into a state that can only be detected by the user. Allowing the
user to reset a system manually can reduce the damage or
danger that could otherwise be caused by an out-of-control
or locked system.
ADM811
GND
VCC
MR
RESET
MICROPROCESSOR
SYSTEM
GND
VCC
RESET
100kΩ
Figure 2. Typical ADM811 Operating Circuit


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