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ADM810RARTZ-REEL7

P1-P3P4-P6P7-P9P10-P11
Microprocessor Supervisory Circuits
in 3-Lead SC70 and SOT-23
Data Sheet
ADM803/ADM809/ADM810
FEATURES
Specified over temperature
Low power consumption: 17 μA
Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options
Reset assertion down to 1 V V
CC
140 ms minimum power-on reset
Open-drain
RESET
output (ADM803)
Push-pull
RESET
output (ADM809)
Push-pull RESET output (ADM810)
SC70 and SOT-23 packages
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
FUNCTIONAL BLOCK DIAGRAMS
F
igure 1.
GENERAL DESCRIPTION
The ADM803/ADM809/ADM810 supervisory circuits monitor
the power supply voltage in microprocessor systems. They
provide a reset output during power-up, power-down, and
brownout conditions. On power-up, an internal timer holds
reset asserted for 240 ms. This holds the microprocessor in a
reset state until conditions have stabilized. The reset output
remains operational with V
CC
as low as 1 V. The ADM803 and
ADM809 provide an active low reset signal (
RESET
), whereas
the ADM810 provides an active high signal (RESET) output.
The ADM809 and ADM810 have push-pull outputs, whereas
the ADM803 has an open-drain output, which requires an
external pull-up resistor.
Seven reset threshold voltage options are available, suitable for
monitoring a variety of supply voltages (see Table 3).
The reset comparator features built-in glitch immunity, making
it immune to fast transients on V
CC
.
The ADM803/ADM809/ADM810 consume only 17 μA, making
them suitable for low power, portable equipment. The ADM803
is available in a 3-lead SC70; the ADM809/ADM810 are available
in 3-lead SOT-23 and 3-lead SC70 packages.
GND GND
V
CC
V
CC
*R
PULL-UP
ADM803/ADM809
MICROPROCESSOR
SYSTEM
V
CC
*ADM803 ONLY
RESET
INPUT
RESET
ADM803
GND
RESET
GENERATOR
240ms
RESET
RESET
(RESET)
GND
RESET
GENERATOR
240ms
ADM809/ADM810
V
CC
V
REF
V
CC
V
REF
03736-001
Rev. I 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.
O
ne Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1997–2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
ADM803/ADM809/ADM810 Data Sheet
Rev. I | Page 2 of 11
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution .................................................................................. 4
Pin Configurations and Function Descriptions ............................5
Typical Performance Characteristics ..............................................6
Interfacing to Other Devices ............................................................8
Ensuring a Valid Reset Output Down to V
CC
= 0 V .................8
Benefits of an Accurate Reset Threshold ...................................8
Interfacing to Microprocessors with Multiple Interrupts ........8
Outline Dimensions ..........................................................................9
Ordering Guide .......................................................................... 10
REVISION HISTORY
10/14—Rev. H to Rev. I
Changes to Applications Section .................................................... 1
Changes to Table 2 ............................................................................ 4
Updated Outline Dimensions ......................................................... 9
Changes to Ordering Guide .......................................................... 10
8/08—Rev. G to Rev. H
Added Figure 4; Renumbered Sequentially .................................. 5
Changes to Figure 8 .......................................................................... 6
Updated Outline Dimensions ......................................................... 9
Changes to Ordering Guide .......................................................... 10
9/06—Rev. F to Rev. G
Updated Outline Dimensions ......................................................... 9
Changes to Ordering Guide ............................................................ 9
6/05—Rev. E to Rev. F.
Changes to Ordering Guide ............................................................ 4
Updated Outline Dimensions ......................................................... 9
2/05—Rev. D to Rev. E.
Changes to Ordering Guide ............................................................ 4
2/05—Rev. C to Rev. D.
Changes to Ordering Guide ............................................................ 4
Updated Outline Dimensions ......................................................... 8
5/03—Rev. B to Rev. C.
Added ADM803 ................................................................. Universal
Changes to Features .......................................................................... 1
Changes to General Description ..................................................... 1
Changes to Figure 1 ........................................................................... 1
Changes to Specifications ................................................................. 2
Changes to Table I ............................................................................. 3
Updated Ordering Guide ................................................................. 4
1/03—Rev. A to Rev. B.
Changes to Specifications ................................................................. 2
Changes to Table I ............................................................................. 3
Changes to Ordering Guide ............................................................. 4
Changes to TPCs 1–3, and TPC 7 ................................................... 5
Updated Outline Dimensions .......................................................... 7
10/02—Rev. 0 to Rev. A.
Addition of SC70 package ................................................. Universal
Change to General Description ....................................................... 1
Changes to Specifications ................................................................. 2
Changes to Absolute Maximum Ratings ........................................ 3
Change to Table I ............................................................................... 3
Change to Ordering Guide ............................................................... 4
Change to TPC 1 ............................................................................... 5
Updated Outline Dimensions .......................................................... 7
4/97—Revision 0: Initial Version
Data Sheet ADM803/ADM809/ADM810
Rev. I | Page 3 of 11
SPECIFICATIONS
V
CC
= full operating range, T
A
= T
MIN
to T
MAX
, V
CC
typical = 5 V for L/M/J models, 3.3 V for T/S models, 3 V for R models, and 2.5 V for
Z models, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
V
CC
OPERATING VOLTAGE RANGE 1.0 5.5 V T
A
= 0°C to 70°C
1.2 5.5 V T
A
= −40°C to +125°C
Supply Current 24 35 μA V
CC
< 5.5 V, ADM8xxL/M/J, T
A
= −40°C to +85°C
17 30 μA V
CC
< 3.6 V, ADM8xxR/S/T/Z, T
A
= −40°C to +85°C
60 μA V
CC
< 5.5 V, ADM8xxL/M/J, T
A
= 85°C to 125°C
60 μA V
CC
< 3.6 V, ADM8xxR/S/T/Z, T
A
= 85°C to 125° C
RESET VOLTAGE THRESHOLD
ADM8xxL 4.56 4.63 4.70 V T
A
= 25°C
4.50 4.75 V T
A
= −40°C to +85°C
4.44 4.82 V T
A
= −40°C to +125°C
ADM8xxM 4.31 4.38 4.45 V T
A
= 25°C
4.25 4.50 V T
A
= −40°C to +85°C
4.20 4.56 V T
A
= −40°C to +125°C
ADM8xxJ 3.93 4.00 4.06 V T
A
= 25°C (ADM809/ADM810 only)
3.89 4.10 V T
A
= −40°C to +85°C (ADM809/ADM810 only)
3.80 4.20 V T
A
= −40°C to +125°C (ADM809/ADM810 only)
ADM8xxT 3.04 3.08 3.11 V T
A
= 25°C
3.00 3.15 V T
A
= −40°C to +85°C
2.95 3.21 V T
A
= −40°C to +125°C
ADM8xxS 2.89 2.93 2.96 V T
A
= 25°C
2.85 3.00 V T
A
= −40°C to +85°C
2.81 3.05 V T
A
= −40°C to +125°C
ADM8xxR 2.59 2.63 2.66 V T
A
= 25°C
2.55 2.70 V T
A
= −40°C to +85°C
2.52 2.74 V T
A
= −40°C to +125°C
ADM8xxZ 2.28 2.32 2.35 V T
A
= 25°C
2.25 2.38 V T
A
= −40°C to +85°C
2.22 2.42 V T
A
= −40°C to +125°C
RESET THRESHOLD TEMPERATURE COEFFICIENT 30 ppm/°C
V
CC
to Reset Delay 20 μs V
CC
= V
TH
to (V
TH
− 100 mV)
RESET ACTIVE TIMEOUT PERIOD 140 240 460 ms T
A
= −40°C to +85°C
100 840 ms T
A
= 85°C to 125°C
RESET OUTPUT VOLTAGE LOW (ADM803/ADM809)
0.3 V
V
CC
= V
TH
min, I
SINK
= 1.2 mA, ADM803R/S/T/Z,
ADM809R/S/T/Z
0.4 V
V
CC
= V
TH
min, I
SINK
= 3.2 mA, ADM803L/M/J,
ADM809L/M/J
0.3 V V
CC
> 1.0 V, I
SINK
= 50 μA
RESET OUTPUT VOLTAGE HIGH (ADM809)
0.8 V
CC
V V
CC
> V
TH
max, I
SOURCE
= 500 μA, ADM809R/S/T/Z
V
CC
− 1.5 V V
CC
> V
TH
max, I
SOURCE
= 800 μA, ADM809L/M/J
RESET OUTPUT VOLTAGE LOW (ADM810)
0.3 V V
CC
= V
TH
min, I
SINK
= 1.2 mA, ADM810R/S/T/Z
0.4 V V
CC
= V
TH
min, I
SINK
= 3.2 mA, ADM810L/M/J
RESET OUTPUT VOLTAGE HIGH (ADM810)
0.8 V
CC
V 1.8 V < V
CC
< V
TH
min, I
SOURCE
= 150 μA
RESET OPEN-DRAIN OUTPUT
Leakage Current (ADM803) 1 μA
V
CC
> V
TH
, RESET deasserted
P1-P3P4-P6P7-P9P10-P11

ADM810RARTZ-REEL7

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Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits RESET GENERATORS I.C.
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