ADM803 Analog Devices, ADM803 Datasheet

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ADM803

Manufacturer Part Number
ADM803
Description
Microprocessor Supervisory Circuit in 3-Lead SC70, Active-Low Open-Drain Output
Manufacturer
Analog Devices
Datasheet

Specifications of ADM803

# Of Monitored Voltages
1
Backup-battery Switch
No
Manual Reset Capability
No
Package
SC70
Reset Threshold Summary
6 Options--2.32 to 4.63V
Reset Output-stage
Active-Low/Open-Drain
Min Reset Timeout (ms)
140
Watchdog Timer
No

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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
140 ms minimum power-on reset
SC70 and SOT-23 packages
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Automotive systems
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
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.
Rev. H
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.
Open-drain RESET output (ADM803)
Push-pull RESET output (ADM809)
Push-pull RESET output (ADM810)
CC
as low as 1 V. The ADM803 and
CC
Microprocessor Supervisory Circuits
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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
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.
V
CC
V
V
CC
CC
in 3-Lead SC70 and SOT-23
ADM803/ADM809
ADM803/ADM809/ADM810
ADM809/ADM810
V
V
FUNCTIONAL BLOCK DIAGRAMS
REF
REF
ADM803
GND
V
CC
©1997–2008 Analog Devices, Inc. All rights reserved.
RESET
*ADM803 ONLY
GND
GND
Figure 1.
GENERATOR
GENERATOR
RESET
RESET
240ms
240ms
*R
CC
PULL-UP
.
RESET
INPUT
MICROPROCESSOR
www.analog.com
SYSTEM
GND
V
RESET
(RESET)
RESET
CC

Related parts for ADM803

ADM803 Summary of contents

Page 1

... The reset comparator features built-in glitch immunity, making it immune to fast transients on V 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. ...

Page 2

... Updated Outline Dimensions ......................................................... 9 2/05—Rev Rev. E. Changes to Ordering Guide ............................................................ 4 2/05—Rev Rev. D. Changes to Ordering Guide ............................................................ 4 Updated Outline Dimensions ......................................................... 8 5/03—Rev 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 Pin Configurations and Function Descriptions ............................5   ...

Page 3

... ADM8xxR ADM8xxZ RESET THRESHOLD TEMPERATURE COEFFICIENT V to Reset Delay CC RESET ACTIVE TIMEOUT PERIOD RESET OUTPUT VOLTAGE LOW (ADM803/ADM809) RESET OUTPUT VOLTAGE HIGH (ADM809) RESET OUTPUT VOLTAGE LOW (ADM810) RESET OUTPUT VOLTAGE HIGH (ADM810) RESET OPEN-DRAIN OUTPUT Leakage Current (ADM803 typical = 5 V for L/M/J models, 3.3 V for T/S models for R models, and 2.5 V for ...

Page 4

... ADM803/ADM809/ADM810 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter V CC RESET, RESET Input Current V CC Output Current RESET, RESET (Push-Pull) RESET (Open Drain) Rate of Rise θ Thermal Impedance JA SC70 SOT-23 Lead Temperature (Soldering, 10 sec) Vapor Phase (60 sec) Infrared (15 sec) ...

Page 5

... PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS GND 1 ADM803/ ADM809/ 3 TOP VIEW (Not to Scale) RESET 2 Figure 3. ADM803/ADM809 Pin Configuration Table 4. Pin Function Descriptions Pin No. ADM803/ADM809 ADM810 Mnemonic 1 1 GND N/A 2 RESET 2 N/A RESET Description Ground Reference for All Signals Active High Logic Output. RESET remains high while V and remains high for 240 ms (typical) after V Active Low Logic Output ...

Page 6

... ADM803/ADM809/ADM810 TYPICAL PERFORMANCE CHARACTERISTICS –40 – TEMPERATURE (°C) Figure 5. Supply Current vs. Temperature (No Load) 200 180 V = 10mV OD 160 140 120 V = 20mV OD 100 100mV 200mV OD 0 –40 – TEMPERATURE (°C) Figure 6. Power-Down Reset Delay vs. Temperature, ADM8xxL/M/J ...

Page 7

... ADM8xxL/M/J 100 ADM8xxR/S/T 100 RESET COMPARATOR OVERDRIVE, V Figure 11. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive 1000 – V (mV Rev Page ADM803/ADM809/ADM810 ...

Page 8

... ADM803/ADM809/ADM810 to other devices. ENSURING A VALID RESET OUTPUT DOWN falls below 0.8 V, the ADM803/ADM809 RESET no When V CC longer sinks current. A high impedance CMOS logic input connected to RESET may, therefore, drift to undetermined logic levels. To eliminate this problem, a 100 kΩ resistor should be connected from RESET to ground ...

Page 9

... COMPLIANT TO JEDEC STANDARDS TO-236-AB Figure 14. 3-Lead Small Outline Transistor Package [SOT-23-3] (RT-3) Dimensions shown in millimeters 2.20 2.00 1.80 2.40 3 2.10 1. PIN 1 0.65 BSC 0.40 1.10 0.10 0.80 0.26 0.40 0.10 SEATING 0.25 PLANE 0.10 COPLANARITY ALL DIMENSIONS COMPLIANT WITH EIAJ SC70 Figure 15. 3-Lead Thin Shrink Small Outline Transistor Package [SC70] (KS-3) Dimensions shown in millimeters Rev Page ADM803/ADM809/ADM810 0.55 REF 0.30 0.20 0.10 ...

Page 10

... ADM803/ADM809/ADM810 ORDERING GUIDE Model Reset Threshold (V) ADM803LAKS-REEL 4.63 ADM803LAKS-REEL7 4.63 2 ADM803LAKSZ-REEL 4.63 2 ADM803LAKSZ-REEL7 4.63 ADM803MAKS-REEL7 4.38 2 ADM803MAKSZ-REEL 4.38 2 ADM803MAKSZ-REEL7 4.38 ADM803RAKS-REEL7 2.63 2 ADM803RAKSZ-REEL 2.63 2 ADM803RAKSZ-REEL7 2.63 ADM803SAKS-REEL7 2.93 2 ADM803SAKSZ-REEL 2.93 2 ADM803SAKSZ-REEL7 2.93 ADM803TAKS-REEL 3.08 ADM803TAKS-REEL7 3.08 2 ADM803TAKSZ-REEL 3.08 2 ADM803TAKSZ-REEL7 3.08 ADM803ZAKS-REEL 2.32 ADM803ZAKS-REEL7 2.32 ADM803ZAKSZ-REEL 2 2.32 2 ADM803ZAKSZ-REEL7 2.32 ADM809JAKS-REEL7 4.00 2 ADM809JAKSZ-REEL 4.00 ADM809JAKSZ-REEL7 2 4.00 ADM809JART-REEL7 4.00 ADM809JARTZ-REEL 2 4.00 2 ADM809JARTZ-REEL7 4.00 ADM809LAKS-REEL7 4.63 2 ADM809LAKSZ-REEL 4.63 2 ADM809LAKSZ-REEL7 4.63 ADM809LART-REEL 4.63 ADM809LART-REEL7 4.63 2 ADM809LARTZ-REEL 4 ...

Page 11

... M52 or ARXX −40°C to +125°C M52 or ARXX −40°C to +125°C ARXX −40°C to +125°C M52 or ARXX −40°C to +125°C M52 or ARXX Rev Page ADM803/ADM809/ADM810 Package Package Quantity Description Option 10k 3-Lead SC70 KS-3 3k 3-Lead SC70 ...

Page 12

... ADM803/ADM809/ADM810 Model Reset Threshold (V) ADM810SAKS-REEL7 2.93 2 ADM810SAKSZ-REEL 2.93 2 ADM810SAKSZ-REEL7 2.93 ADM810SART-REEL7 2.93 2 ADM810SARTZ-REEL 2.93 ADM810SARTZ-REEL7 2 2.93 ADM810TAKS-REEL7 3.08 ADM810TAKSZ-REEL 2 3.08 2 ADM810TAKSZ-REEL7 3.08 ADM810TART-REEL7 3.08 2 ADM810TARTZ-REEL 3.08 2 ADM810TARTZ-REEL7 3.08 ADM810ZAKS-REEL 2.32 ADM810ZAKS-REEL7 2.32 2 ADM810ZAKSZ-REEL 2.32 2 ADM810ZAKSZ-REEL7 2.32 ADM810ZART-REEL 2.32 ADM810ZART-REEL7 2.32 2 ADM810ZARTZ-REEL 2.32 2 ADM810ZARTZ-REEL7 2. Date code, may be top or bottom marked RoHS Compliant Part. 3 RoHS compliant part has XX branded on the bottom of the device. ...

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