ADM1276-3ACPZ

Overview

The ADM1276-3ACPZ is a positive hot swap controller designed for inserting or removing circuit boards from live backplanes. It integrates a 12-bit analog-to-digital converter (ADC) to provide precise current and voltage monitoring. The device supports communication via the PMBus interface, enabling detailed power management and system health reporting. It operates within a supply voltage range of 16 V to 80 V and functions reliably across an industrial temperature range from -40°C to +105°C. Packaged in a compact 20-lead LFCSP-WQ (5x5 mm) format, it offers surface-mount installation suitable for dense PCB layouts.

Feature Summary

• Enables safe insertion and removal of circuit boards into energized backplanes without causing system disruption.
• Integrates a high-resolution 12-bit ADC for accurate real-time measurement of input current and voltage.
• Supports digital control and monitoring through standard PMBus communication protocols.

Applications

• Server and storage backplane protection
• Telecommunications equipment hot swapping
• Industrial control board insertion systems

Procurement Notes

Verify the specific suffix '3' against the manufacturer's latest documentation to confirm pinout and feature set variations. Confirm package type matches the 20-lead LFCSP-WQ specification. Check for RoHS compliance status directly with the supplier. Ensure the component meets the required operating temperature range for your specific environment. Validate that the PMBus interface compatibility aligns with your system controller.

Selection Notes

Select this component when active hot swap capability is required for high-voltage backplane applications. The integrated ADC eliminates the need for external sensing resistors and amplifiers, reducing bill of materials cost. Choose this part if PMBus integration is necessary for advanced power telemetry. Consider the 20-lead package size constraints during PCB layout planning. Verify that the 16 V minimum operating voltage suits your system's rail specifications.

Part Context

This device belongs to Analog Devices' ADM127x family of hot swap controllers. These components are engineered for robust power distribution in enterprise and telecom infrastructure. The family shares common architectural features for overcurrent protection and soft-start sequencing. The ADM1276 variant specifically emphasizes digital monitoring capabilities through its built-in ADC and PMBus interface.

Replacement Considerations

Consult Analog Devices official substitution guides for verified alternatives. Cross-reference pinouts and thermal characteristics before replacing. Generic equivalents may lack the integrated 12-bit ADC or PMBus support.