Analog Devices ADM1818, ADM1812, ADM1811, ADM1810 Datasheet
a
V
CC
TOLERANCE
BIAS
TC
REFERENCE
150ms
DELAY
V
CC
GND
ADM1810/ADM1815
RST
V
CC
TOLERANCE
BIAS
TC
REFERENCE
150ms
DELAY
V
CC
GND
ADM1812/ADM1817
RST
V
CC
TOLERANCE
BIAS
TC
REFERENCE
150ms
DELAY
V
CC
GND
ADM1813/ADM1818
RST
RESET
MONITOR
5.5kV
V
CC
TOLERANCE
BIAS
TC
REFERENCE
150ms
DELAY
V
CC
GND
ADM1811/ADM1816
RST
5.5kV
Microprocessor Reset Circuits
ADM1810–ADM1813/ADM1815–ADM1818
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Reliable Low Cost Voltage Monitor with Reset Output
Supports Monitoring of Supplies Within 5%, 10%, 15%
and 20% Tolerance
Active High and Low Push-Pull Output Choices
(ADM1810, ADM1812, ADM1815 and ADM1817)
Open Drain Output Choices (ADM1811, ADM1813,
ADM1816 and ADM1818)
Can Be Used with a Manual Push-Button to Generate a
Reset (ADM1813, ADM1818)
Initialize Microprocessor Systems with Added Safety
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
GENERAL DESCRIPTION
The ADM181x range of voltage monitoring circuits can be used
in any application where an electronic system needs to be reset
when a voltage increases above or below a predetermined value.
Because of the “reset delay time” incorporated into the ADM181x
series, these devices can provide a safe startup for electronic
systems. Before a system initializes, the power supply must stabilize. Using the ADM181x series ensures that there are typically
150 ms for the power supply to stabilize before the system is
reset and safe system initialization begins.
The ADM181x series of microprocessor reset circuits are available in low cost, space-saving SOT-23 packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
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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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
ADM1810–ADM1813/ADM1815–ADM1818–SPECIFICATIONS
(TA = –40ⴗC to +85ⴗC unless otherwise noted)
Parameter Min Typ Max Units Test Conditions/Note
SUPPLY
Voltage 1.2 5.5 V
Current 30 40 µA (ADM1810/ADM1811/ADM1813)
VCC < 5.5 V, RST Output Open
30 40 µA (ADM1812) V
28 35 µA (ADM1815/ADM1816/ADM1817/ADM1818)
VCC < 5.5 V, RST Output Open
OUTPUT CURRENT 8 mA @ 0.4 V, V
350 µA (ADM1810/ADM1812/ADM1815/ADM1817)
@ 2.4 V, V
OUTPUT VOLTAGE V
– 0.5 VCC – 0.1 V (ADM1810/ADM1812/ADM1815/ADM1817)
CC
@ 0 µA to 500 µA
V
TRIP-POINT
CC
ADM1810-5, ADM1810-10, ADM1810-15/
ADM1811/ADM1812/ADM1813-5 4.50 4.62 4.75 V (5%)
ADM1811/ADM1812/ADM1813-10 4.25 4.35 4.49 V (10%)
ADM1811/ADM1812/ADM1813-15 4.00 4.13 4.24 V (15%)
ADM1815/ADM1816/ADM1817/
ADM1818-5 2.98 3.06 3.15 V (5%)
ADM1815/ADM1816/ADM1817/
ADM1818-10 2.80 2.88 2.97 V (10%)
ADM1815/ADM1816/ADM1817/
ADM1818-20 2.47 2.55 2.64 V (20%)
INTERNAL PULL-UP RESISTOR
ADM1811/ADM1813/ADM1816/ADM1818 3.5 5.5 7.5 kΩ
OUTPUT CAPACITANCE 10 pF
RESET ACTIVE TIME 100 150 300 ms
V
DETECT TO RST
CC
Falling 5 10 µs (ADM1810/ADM1811/ADM1812/ADM1813)
715µs (ADM1815/ADM1816/ADM1817/ADM1818)
Rising 100 150 300 ms t
= 5 µs
R
PUSH-BUTTON DETECT TO RST 1 µs (ADM1813/ADM1818)
PUSH-BUTTON RESET
100 150 300 ms (ADM1818) 2.7 V ≤ VCC ≤ 3.3 V
100 150 300 ms (ADM1813)
NOTES
*For ADM181x-20, VCC = V
Specifications subject to change without notice.
, sink current reduces to 8 mA.
CCTP
CC
≥ 2.7 V*
CC
≥ 2.7 V
CC
< 5.5 V
–2–
REV. 0
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