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ADM811:  MICROPROCESSORS SUPERVISORY CIRCUIT IN 4-LEAD SOT-143, LOGIC LOW RESET BAR OUTPUT

The ADM811/ADM812 are reliable voltage monitoring devices suitable for use in most voltage monitoring applications. The ADM811/ADM812 are designed to monitor six different voltages, each allowing a 5% or 10% degradation of standard PSU voltages before a reset occurs. These voltages have been selected for the effective monitoring of 2.5 V, 3 V, 3.3 V, and 5 V supply voltage levels.

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ADM811:  MICROPROCESSORS SUPERVISORY CIRCUIT IN 4-LEAD SOT-143, LOGIC LOW RESET BAR OUTPUT

Product Description

The ADM811/ADM812 are reliable voltage monitoring devices suitable for use in most voltage monitoring applications. The ADM811/ADM812 are designed to monitor six different voltages, each allowing a 5% or 10% degradation of standard PSU voltages before a reset occurs. These voltages have been selected for the effective monitoring of 2.5 V, 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 are operating enters into a state that can only be detected by the user. Allowing the user to reset a system manually can reduce the damage or danger that could otherwise be caused by an out-of-control or locked system.

APPLICATIONS

  • Microprocessor systems
  • Controllers
  • Intelligent instruments
  • Automotive systems
  • Safety systems
  • Portable instruments

    • Data Sheet, Rev. F, 8/09

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    • Superior upgrade for MAX811/MAX812
    • Specified over temperature
    • Low power consumption: 5 μA typical
    • Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options
    • Reset assertion down to 1 VCC
    • Power-on reset: 140 ms minimum
    • Logic low RESET output (ADM811)
    • Logic high RESET output (ADM812)
    • Built-in manual reset
    • # of Monitored Voltages: 1
    • Backup-Battery Switch: No
    • Manual Reset Capability: Yes
    • Package: SOT
    • Reset Threshold Summary: 6 Options--2.32 to 4.63V
    • Reset Output-Stage: Active-Low/Push-Pull
    • Min Reset Timeout (ms): 140
    • Watchdog Timer: No

    ADM811 Functional Block Diagram

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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.