CT425-HSN820DR

Current Sensors Overview

The Allegro MicroSystems CT425-HSN820DR is a board-mount current sensor utilizing XtremeSense TMR technology. It features a unidirectional detection range of 20A with a sensitivity of 100mV/A and an accuracy of ±0.7%. The device operates on a supply voltage of 3V to 3.6V, drawing a maximum supply current of 9mA. It provides a voltage output in an 8-SOIC package (0.154" width). Key electrical parameters include a linearity of ±0.1%, a response time of 300ns, and a frequency range of DC to 1MHz. The component supports AC/DC measurements and functions within a temperature range of -40°C to 125°C.

Current Sensors Feature Summary

• Utilizes XtremeSense Tunnel Magnetoresistance (TMR) technology for ultra-low noise magnetic field sensing.
• Provides high precision with ±0.7% accuracy and ±0.1% linearity for reliable current monitoring.
• Features a compact 8-lead SOIC surface-mount package suitable for space-constrained designs.

Current Sensors Applications

• Battery management systems
• Motor control circuits
• Power supply monitoring

Current Sensors Procurement Notes

Verify the lifecycle status before integration, as this specific part number may be classified as Not Recommended for New Designs (NRND). Confirm that the 3V to 3.6V supply voltage requirement aligns with the target system architecture. Ensure the unidirectional 20A detection limit meets the application's peak current demands without requiring derating or alternative selection.

Current Sensors Selection Notes

Select this component when low noise and high linearity are critical for accurate current feedback in low-voltage systems. The 3V to 3.6V operating range distinguishes it from higher-voltage variants like the CT428 series. Consider the NRND status for long-term production viability; if new design approval is required, evaluate equivalent active parts such as the CT427 or CT428 series which offer similar form factors but different voltage or current specifications.

Current Sensors Part Context

The CT425 belongs to the Allegro XtremeSense Crocus series, leveraging advanced TMR sensors for superior performance compared to traditional Hall-effect devices. This series emphasizes low power consumption and high bandwidth, making it suitable for demanding industrial and automotive applications where signal integrity and speed are paramount.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers: CT427-HSN820DR, CT428-HSN820MR.