ADM1186-1ARQZ-REEL

Supervisors Overview

The ADM1186-1ARQZ-REEL is a quad voltage sequencer and monitor integrated circuit manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V applied to the VCC pin. The device incorporates four precision comparators that monitor external voltage rails, utilizing a shared internal 0.6 V reference with a worst-case accuracy of 0.8%. External resistor networks connected to the VIN1 through VIN4 pins allow programming of under-voltage trip points. The component features a digital core supporting up-and-down supply sequencing and cascading capabilities for multiple devices. It provides four open-drain enable outputs, an open-drain power-good output, and a bidirectional open-drain fault pin.

Supervisors Feature Summary

• Provides sequential control of four power supplies via a state machine mechanism
• Monitors four independent voltage rails using high-accuracy comparators
• Supports cascading configurations for multi-device system synchronization
• Features programmable timing delays for supply sequencing and timeout functions

Supervisors Applications

• Telecommunications equipment power management
• Server and PC motherboard voltage sequencing
• Microprocessor system power-up and power-down control
• Multi-rail power supply monitoring and alarm systems

Supervisors Procurement Notes

Verify the specific suffix REEL indicates tape-and-reel packaging when sourcing components. Confirm the part number corresponds to the ADM1186-1 variant which includes sequence complete and bidirectional fault pins, distinct from the standard ADM1186 model. Ensure compatibility with the required SSOP or QSOP package dimensions depending on the specific manufacturing lot designation found in official documentation.

Supervisors Selection Notes

Select this component when precise sequencing of four voltage rails is required alongside continuous monitoring. The device is suitable for systems needing programmable delay times and fault handling via open-drain outputs. Consider the 0.8% comparator accuracy and the need for external resistor dividers to set threshold levels. Verify that the operating temperature range meets the application requirements.

Supervisors Part Context

This component belongs to the ADM1184/ADM1186 family of voltage monitors. While the ADM1184 offers only monitoring with three outputs, the ADM1186 adds sequencing capabilities with four outputs. The ADM1186-1 variant specifically includes additional control pins for sequence completion and bidirectional fault signaling, enabling complex multi-device coordination in advanced power management architectures.

Supervisors Replacement Considerations

The ADM1186-2ARQZ serves as a related variant within the same family but lacks the specific sequence complete and bidirectional fault pin configuration of the ADM1186-1. Direct substitution requires verifying pinout compatibility and ensuring the target application does not rely on the unique control signals provided by the -1 suffix version.