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ADM1810 View Datasheet(PDF) - Analog Devices

Part Name
Description
Manufacturer
ADM1810
ADI
Analog Devices ADI
ADM1810 Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ADM1810 to ADM1813/ADM1815 to ADM1818
THEORY OF OPERATION
TIMING DIAGRAMS FOR ALL DEVICES
The following two timing diagrams are valid for ADM1810,
ADM1811, ADM1812, ADM1813, ADM1815, ADM1816,
ADM1817, and ADM1818.
VCC
VCC TRIP POINT (MAX)
VCC TRIP POINT
RST
VCC TO RESET
DELAY
VCC TRIP POINT (MIN)
VOL
Figure 9. Power-Down Timing Diagram
VCC TRIP POINT (MIN)
VCC
VCC TRIP POINT (MAX)
VCC TRIP POINT
RESET ACTIVE TIMEOUT
RST
Figure 10. Power-Up Timing Diagram
ADM1813 AND ADM1818
The ADM1813 and ADM1818 are low cost voltage monitoring
devices featuring an open-drain output and optional push-button
reset function.
VCC
ADM1813/
ADM1818
VCC
RST
MICRO-
PROCESSOR
RESET
GND
Figure 11. ADM1813/ADM1818 Typical Application
An optional push-button reset switch can be connected between
RST and ground. Pressing this switch pulls the reset output low. If
the push-button reset button pulls the RST output low for a period
greater than 1 μs when the reset button releases the RST line to
float high, then the RST line stays low for another 150 ms typical.
PUSH-BUTTON TIME
RESET TIMEOUT
VOLTAGE
INPUT LOW
VOLTAGE
INPUT HIGH
Figure 12. Push-Button Reset Timing Diagram
The ADM1818 range has 2.88 V and 2.55 V (typical) trip point
options that allow the user to monitor 3.3 V and 3 V supplies.
For 5 V monitoring requirements, the ADM1813 range has 4.62 V
and 4.35 V (typical) trip point options.
ADM1810, ADM1812, ADM1815, AND ADM1817
The ADM1812 is a 5 V supply monitor with an active high push-
pull output and trip point options of 4.62 V and 4.35 V typical.
The ADM1810 is similar to the ADM1812, except that the
ADM1810 has an active low push-pull output stage. The ADM1817
is suitable for monitoring 3.3 V, 3 V, and 2.5 V supplies, with an
active high push-pull output and trip point options of 3.06 V,
2.88 V, 2.55 V, 2.31 V, and 2.18 V typical. The ADM1815 is similar
to the ADM1817, except that the ADM1815 has an active low
push-pull output stage.
The ADM1810/ADM1812/ADM1815/ADM1817 can connect
directly to most microprocessor reset inputs without the need for
external components.
VCC
ADM1810/
ADM1812/
ADM1815/
ADM1817
VCC
RST/RST
GND
MICRO-
PROCESSOR
RESET
Figure 13. ADM1810/ADM1812/ADM1815/ADM1817 Typical Application
ADM1811 AND ADM1816
The ADM1811 is a 5 V supply monitor with an active low open-
drain output and trip point options of 4.62 V and 4.35 V typical.
The ADM1816 also has an active low open-drain output but is
suitable for monitoring lower voltage supplies of 3.3 V, 3 V,
and 2.5 V.
VCC
ADM1811/
ADM1816
MICRO-
PROCESSOR
VCC
GND
RST
RESET
Figure 14. ADM1811/ADM1816 Typical Application
Rev. E | Page 7 of 16
 

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