ADM1175-3ARMZ-R7

Overview

The ADM1175-3ARMZ-R7 is a hot swap controller and digital power monitor from Analog Devices. It integrates a precision current sense amplifier and a 12-bit ADC for real-time voltage and current monitoring via an I2C interface. The device supports supply voltages from 3.15 V to 16.5 V and features charge-pumped gate drive for external N-channel FETs. Key specifications include a ±3% accurate hot swap current limit, adjustable analog current limit with circuit breaker functionality, and programmable timing. It operates within a temperature range of -40°C to +85°C in a 10-lead MSOP package.

Feature Summary

• Integrates a 12-bit ADC for precise digital readback of current and voltage parameters
• Provides automatic retry or latch-off protection modes upon detection of current faults
• Features a charge-pumped gate drive mechanism designed for efficient control of external N-channel MOSFETs
• Supports flexible configuration through active high and active low ON/ONB pin options

Applications

• Central office equipment power distribution
• Telecommunications and data communications systems
• PCs and servers requiring safe board insertion and removal
• Power monitoring and power budgeting applications

Procurement Notes

Verify the specific suffix 'R7' corresponds to the required tape and reel packaging quantity. Confirm that the '-3' variant matches the desired pinout or feature set compared to other models in the ADM1175 series. Ensure compatibility with the target I2C bus speed and voltage levels. Check for any recent production changes or obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when integrated digital power monitoring is required alongside hot swap capabilities. It is suitable for designs needing precise current limiting with circuit breaker features. Consider the I2C interface requirement for system integration. Evaluate the need for external N-channel FETs and ensure the gate drive capability meets the load requirements. Verify thermal performance within the specified operating temperature range.

Part Context

This part belongs to the ADM1175 family of hot swap controllers. Unlike basic controllers, it includes on-chip sensing and conversion capabilities. It serves as a bridge between power management and digital monitoring systems. The device simplifies design by combining control logic with measurement functions in a single compact package.

Replacement Considerations

The ADM1175-4ARMZ-R7 is a documented similar part number within the same product family. Verify if the specific pinout or feature differences between the '-3' and '-4' variants are acceptable for the application.