ADM811-3TART-RL7 Analog Devices, ADM811-3TART-RL7 Datasheet

ADM811-3TART-RL7

Manufacturer Part Number

ADM811-3TART-RL7

Description

Microprocessors Supervisory Circuit in 4-Lead SOT-143

Manufacturer

Analog Devices

Datasheet

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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 five different

voltages, each allowing for a 5% or 10% degradation of standard

PSU voltages before a reset occurs. These voltages have been

selected for the effective monitoring of +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 is operating enters

into a state that can only be detected by the user. Allowing the

user to manually reset a system can reduce the damage or dan-

ger that could be otherwise caused by an out-of-control or

locked up system.

REV. 0

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.

FEATURES

Superior Upgrade for MAX811/MAX812

Specified Over Temperature

Low Power Consumption (5 A Typ)

Precision Voltage Monitor: +3 V, +3.3 V, +5 V Options

Reset Assertion Down to 1 V V

140 ms Min Power-On Reset

Built-In Manual Reset

APPLICATIONS

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments

Logic Low RESET Output (ADM811)

Logic High RESET Output (ADM812)

Supervisory Circuit in 4-Lead SOT-143

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

REF

Figure 1. Typical Operating Circuit

FUNCTIONAL BLOCK DIAGRAM

DEBOUNCE

World Wide Web Site: http://www.analog.com

ADM811

GND

ADM811/ADM812

GENERATOR

ADM811/ADM812

RESET

Microprocessors

100k

RESET

GND

RESET/RESET

SYSTEM

GND

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ADM811-3TART-RL7 Summary of contents

Page 1

... The Manual Reset function is very useful especially if the circuit in which the ADM811/ADM812 is operating enters into a state that can only be detected by the user. Allowing the user to manually reset a system can reduce the damage or dan- ger that could be otherwise caused by an out-of-control or locked up system ...

Page 2

... RESET Output Voltage Low (ADM812R/S/T) Low (ADM812L/M) High (ADM812R/S/T/L/M) Low (ADM811R/S/T) Low (ADM811L/M) Low (ADM811R/S/T/L/M) High (ADM811R/S/T) High (ADM811L/M) Specifications subject to change without notice. ABSOLUTE MAXIMUM RATINGS* (Typical values are +25 C unless otherwise noted) A Terminal Voltage (With Respect to Ground –0 All Other Inputs . . . . . . . . . . . . . . . . .– ...

Page 3

... Leave floating when not used +3 monitored CC supply voltage. Model* ADM811LART-REEL ADM811LART-REEL-7 ADM811MART-REEL ADM811MART-REEL-7 ADM811TART-REEL ADM811TART-REEL-7 ADM811-3TART-REEL ADM811-3TART-RL7 ADM811SART-REEL ADM811SART-REEL-7 ADM811RART-REEL ADM811RART-REEL-7 ADM812LART-REEL ADM812LART-REEL-7 ADM812MART-REEL ADM812MART-REEL-7 ADM812TART-REEL ADM812TART-REEL-7 ADM812SART-REEL ADM812SART-REEL-7 ADM812RART-REEL ADM812RART-REEL-7 *Only available in reels. ...

Page 4

... Performance Characteristics ADM811/ADM812 5. TEMPERATURE – C Figure 2. Supply Current vs. Temperature (ADM81_R/S/T) 1000 900 800 700 600 500 400 V = 20mV 300 OD 200 V = 125mV 100 200mV OD 0 TEMPERATURE – C Figure 3. Power-Down RESET Delay vs. Temperature ...

Page 5

... CIRCUIT INFORMATION RESET THRESHOLDS The reset output provides a RESET (for the ADM811 RESET (for the ADM812) output to the microprocessor when- ever the V input is below the reset threshold. The actual reset CC threshold is dependant on whether suffix is used. Please refer to Table I. ...

Page 6

... ADM811/ADM812 0.055 (1.40) 0.047 (1.20) 0.004 (0.10) 0.001 (0.03) SEATING OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 4-Lead Plastic Surface Mount Package (SOT-143) 0.079 (2.00) 0.071 (1.80 0.098 (2.50) 0.083 (2.10 PIN 1 0.080 (2.03) 0.070 (1.78) 0.120 (3.05) 0.105 (2.67) 7 0.040 (1.02) 0.031 (0.79) 0.037 (0.94) 0.021 (0.54) 0.0059 (0.089) 0.0035 (0.15) 0.030 (0.77) 0.015 (0.38) PLANE –6– ...

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