ADM1185:  Quad Voltage Monitor and Sequencer

The ADM1185 is an integrated, 4-channel, voltage monitoring and sequencing device. A 2.7 V to 5.5 V power supply is required on the VCC pin to power the device.

Four precision comparators ...More

ADM1185:  Quad Voltage Monitor and Sequencer

Product Description

The ADM1185 is an integrated, 4-channel, voltage monitoring and sequencing device. A 2.7 V to 5.5 V power supply is required on the VCC pin to power the device.

Four precision comparators monitor four voltage rails. All comparators have a 0.6 V reference with a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the trip points for the monitored supply rails.

A digital core interprets the status of the comparator outputs.

Internal time delays can be used for sequencing the startup of subsequent power supplies enabled by the outputs. Supplies falling out of range are also detected and, as a result, appropriate outputs are disabled.

The ADM1185 has four open-drain outputs. In a typical configuration, OUT1 to OUT3 are used to enable power supplies, while PWRGD is a common power-good output, indicating the status of all monitored supplies.

The ADM1185 is available in a 10-lead mini small outline package (MSOP).

Applications

  • Monitor and alarm functions
  • Power supply sequencing
  • Telecommunication and data communication equipment
  • PCs/servers

    • Data Sheet, Rev. A, 11/07

    Features

    • Powered from 2.7 V to 5.5 V on the VCC pin
    • Logical core with internal timeouts provides power supply sequencing and fault protection
    • 4 inputs can be programmed to monitor different voltage levels with resistor dividers
    • Monitors 4 supplies via 0.8% accurate comparators
    • 3 open-drain enable outputs
    • Open-drain power-good output (PWRGD)
    • 10-lead MSOP

    Diagrams

    ADM1185 Diagram
    Functional Block Diagram for ADM1185

    Specifications

    # Supplies Monitored 4:Cascadeable
    # Output Drivers 4
    Programming Method Analog
    FET Drive/Enable Output Enable
    Package 10-Lead MSOP
    Volt Monitoring Accuracy 0.8%

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    Part# # Supplies Monitored Volt Monitoring Accuracy # Output Drivers FET Drive/Enable Output Sequencing Package Price* (1000-4999)
    ADM1085 1:Cascadeable 7% 1 Enable Up 6 ld SC70 $0.34
    ADM1086 1:Cascadeable 7% 1 Enable Up 6 ld SC70 $0.34
    ADM1087 1:Cascadeable 7% 1 Enable Up 6 ld SC70 $0.34
    ADM1088 1:Cascadeable 7% 1 Enable Up 6 ld SC70 -
    ADM1184 4:Cascadeable 0.8% 4 Enable Up 10-Lead MSOP $2.42
    ADM1185 4:Cascadeable 0.8% 4 Enable Up 10-Lead MSOP $1.21
    ADM1186 4:Cascadeable 0.8% 4 - Up & Down 16 ld QSOP, 20-ld QSOP $3.02
    ADM6819 2:Cascadeable 2.6% 1 FET Drive Up 6-ld SOT-23 $1.21
    ADM6820 2:Cascadeable 2.6% 1 FET Drive Up 6-ld SOT-23 $1.21

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

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    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
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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 iinto your cart to check sample availability.

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