CT427-HSN820MR

Current Sensors Overview

The CT427-HSN820MR is a unipolar current sensor utilizing XtremeSense TMR technology. It features a 20A detection range with 100mV/A sensitivity and ±0.7% accuracy. The device operates on a 3V to 3.6V supply, drawing a maximum of 9mA. It provides a voltage ratio output through an 8-SOIC package (0.154 inch width). Key electrical parameters include ±0.1% linearity, a 300ns response time, and a frequency range of DC to 1MHz. The component supports AC/DC measurements across a temperature range of -40°C to 125°C.

Current Sensors Feature Summary

• Integrates patented XtremeSense Tunnel Magnetoresistance (TMR) technology for high-performance sensing.
• Provides a linear voltage ratio output proportional to the detected magnetic field.
• Supports bidirectional current measurement capabilities within the specified detection range.

Current Sensors Applications

• White goods motor control
• Battery management systems
• Consumer electronics power monitoring
• Telecom power supplies

Current Sensors Procurement Notes

Verify the specific suffix 'HSN820MR' against official Allegro MicroSystems documentation to confirm the exact sensitivity, polarity, and packaging configuration. Ensure that the required operating voltage range and thermal characteristics align with the target application design specifications before finalizing procurement orders.

Current Sensors Selection Notes

Select this component when a compact surface-mount solution is required for low-to-medium current monitoring. The choice depends on the need for high bandwidth up to 1MHz and precise linearity in space-constrained designs. Evaluate the trade-off between the 3V-3.6V supply requirement and the system's available power rails.

Current Sensors Part Context

This part belongs to the XtremeSense Crocus series from Allegro MicroSystems. It represents a class of magnetoresistive sensors designed for contact current applications. The family utilizes advanced thin-film magnetic technology to achieve superior signal-to-noise ratios compared to traditional Hall-effect devices.

Current Sensors Replacement Considerations

The CT426-HSN820MR is documented as a parameter-equivalent substitute. Note that the CT426 variant is marked as not recommended for new designs and differs in polarity configuration. Verify functional compatibility before substitution.