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XtremeSense TMR Current Sensor with High dV/dt Immunity, 5kV Isolation and Common-Mode Field Rejection

CT432

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Documentation and Resources

Description

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Typical Applications

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The CT432 is a high bandwidth and ultra-low noise integrated contact current sensor that uses Allegro MicroSystems’ patented XtremeSense™ TMR technology to enable high accuracy current measurements for many consumer, enterprise, and industrial applications. It supports multiple current ranges where the integrated current carrying conductor (CCC) will handle up to 70 A of current and generates a current measurement as a linear analog output voltage. It achieves a total output error of less than ±1.0% full-scale (FS) over supply voltage and the full temperature range.

It has about a 300 ns output response time while the current consumption is about 6.0 mA and is immune to common mode fields. The CT432 was optimized for high dV/dt applications which minimizes capacitive coupling to VOUT allowing CT432 to be used in switching applications.

The CT432 is offered in an industry-standard 16-lead SOIC- Wide package that is “green” and RoHS compliant. Also available in 3.3 V version as CT433.

Optimized for high dV/dt applications
Total Error Output: ±0.5% FS
300 ns Response Time, 1 MHz Bandwidth
Noise as Low as 9.0 mARMS
Integrated 0.5 mΩ Conductor
VCC = 5.0 V
Common Mode Field Rejection: -54 dB
Rated Isolation Voltage: >5 kVRMS
UL/IEC 62368-1 and UL1577 Certification
IEC 61000-4-5 Certified
AC or DC Current Range:
- +20.0 ADC / ±20.0 APK
- +30.0 ADC / ±30.0 APK
- +50.0 ADC / ±50.0 APK
- +65.0 ADC / ±65.0 APK
- +70.0 ADC / ±70.0 APK
16-Lead SOIC-Wide package
8mm creepage package

Power Inverters
UPS, SMPS and Telecom Power Supplies
Motor Control
Over-Current Fault Protection

The CT432 is offered in an industry-standard 16-lead SOIC- Wide package that is “green” and RoHS compliant.

CT432: XtremeSense® TMR Current Sensor with High dV/dt Immunity, 5kV Isolation and Common-Mode Field Rejection Functional Block Diagram

Part Number Specifications and Availability

Allegro's XtremeSense™ TMR technology

Superior magnetic sensitivity, low power consumption, and compact size compared to other technologies, driving innovation in applications like renewable energy, electric vehicles, and consumer electronics.

Learn More

Documentation and Resources

Documentation

Design Tools

Third Party Design Tools

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All Types Application Note Brochure Guide

Documents Found: 32

Document Type	Document Name
Application Note	CMTI Comparison for Allegro Integrated Conductor Current Sensors
Application Note	CT43X Performance Overview
Application Note	What is XtremeSense TMR
Application Note	CT430 Power Measurement Module
Application Note	CT43X Design Recommendation
Application Note	Fuse Time vs. Current for the CT43X Contact Current Sensors
Application Note	Using the CT43X TMR Current Sensor in Power Distribution Units (PDUS)
Application Note	Glossary of Isolation-Related Terms for Integrated Current Sensors
Application Note	Package Thermal Resistance for Allegro Current Sensors with Integrated Conductors
Brochure	The Future of Sensing: XtremeSense™ TMR Technology
Brochure	DC Fast Charging: Faster and Farther
Brochure	Comfort Through Sustainability - Unlock the Power of Heat Pump Innovation
Guide	CT432-20AC Evaluation Board User Guide
Guide	CT432-50AC Evaluation Board User Guide

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Documents Found: 32

Document Type	Document Name
Webpage	Current Sensor Evaluation Boards Page

TMR Current Sensor Breakout Board for the CT432 and CT433

Pololu CT432/CT433 TMR Current Sensor Carriers

Pololu is offering breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their CT432/CT433 tunneling magnetoresistance (TMR), electrically isolated, high-bandwidth current sensors that are optimized for high dV/dt applications.

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