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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 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 ...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

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

    Functional Block Diagram for ADM1185

    类似产品

    arrow View Full Interactive Product Selection Table
    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 Enable 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
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    * 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.

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