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High accuracy current sensor ALLEGRO CT431-HSWF30MR with integrated overcurrent detection and low noise output

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High accuracy current sensor ALLEGRO CT431-HSWF30MR with integrated overcurrent detection and low noise output

working temperature : -40℃~+125℃

Current Range : ±30A

Voltage - Supply : 3.3V

Band Width : 1MHz

Current Terminal Resistance : 1mΩ

Response Time (tr) : 300ns

Sensitivity : 33.3mV/A

Bidirectional Current Detection : Support

Description : ±30A 33.3mV/A SOIC-16W Current Sensors RoHS

Mfr. Part # : CT431-HSWF30MR

Model Number : CT431-HSWF30MR

Package : SOIC-16W

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Product Overview

The CT431 is a high-bandwidth, ultra-low noise integrated contact current sensor utilizing Allegro's XtremeSense TMR technology for high-accuracy current measurements. It supports nine current ranges, with the integrated current-carrying conductor (CCC) handling up to 65 A and providing a linear analog output voltage. The device boasts a total output error of less than 1.0% full-scale (FS) across voltage and temperature, a ~300 ns output response time, and immunity to common mode fields. It features integrated overcurrent detection (OCD) circuitry with a fault output (FLT) pin for alerting microcontrollers to out-of-range currents. Offered in an industry-standard, green, RoHS-compliant 16-lead SOIC wide package, the CT431 is suitable for industrial, consumer, and automotive applications including solar/power inverters, UPS, SMPS, telecom power supplies, battery management systems, motor control, white goods, and power utility meters.

Product Attributes

Brand: Allegro MicroSystems
Technology: XtremeSense TMR
Package Type: 16-lead SOIC Wide (SOICW)
Certifications: UL/IEC 62368-1, UL1577, AEC-Q100 Grade 1
Compliance: Green, RoHS Compliant
Isolation Voltage (Rated): 5 kVRMS
Working Voltage for Basic Isolation: 1100 VRMS
Working Voltage for Reinforced Isolation: 550 VRMS

Technical Specifications

Model	Current Range (IPMAX) (A)	Sensitivity (mV/A)	Operating Temperature Range (C)	Bandwidth (MHz)	Response Time (ns)	Total Output Error (% FS)	Supply Voltage (V)	Current Consumption (mA)	Package	Package Dimensions (mm)
CT431-HSWF20MR / CT431-ASWF20MR	20	50	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF30MR / CT431-ASWF30MR	30	33.3	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF40MR	40	25	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF50MR / CT431-ASWF50MR	50	20	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF65MR / CT431-ASWF65MR	65	15.4	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF20DR / CT431-ASWF20DR	0 to 20	100	40 to 125	1.0	~300	1.0 to 1.5	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF30DR / CT431-ASWF30DR	0 to 30	66.7	40 to 125	1.0	~300	1.0	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF50DR / CT431-ASWF50DR	0 to 50	40	40 to 125	1.0	~300	1.5	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
CT431-HSWF65DR / CT431-ASWF65DR	0 to 65	30.8	40 to 125	1.0	~300	1.5	3.0 to 3.6	~6.0	16-lead SOICW	10.21 10.31 2.54
Supply Voltage (VCC)	3.0 to 3.6 V
Output Response Time	~300 ns
Bandwidth	1.0 MHz
Common Mode Field Rejection Ratio (CMFRR)	54 dB
Overcurrent Detection (OCD) Threshold	110% of maximum current range (unipolar), 110% (bipolar)
Undervoltage Lockout (UVLO) Threshold	Rising: 2.50 V, Falling: 2.45 V
Fault Output (FLT) Type	Open-drain, active low digital signal
Primary Conductor Resistance (RIP)	~0.5 m

2408081044_ALLEGRO-CT431-HSWF30MR_C22442741.pdf

High accuracy current sensor ALLEGRO CT431-HSWF30MR with integrated overcurrent detection and low noise output Images

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