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Precision linear Hall effect current sensor ALLEGRO ACS781LLRTR-050U-T with coreless compact package design

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Precision linear Hall effect current sensor ALLEGRO ACS781LLRTR-050U-T with coreless compact package design

working temperature : -40℃~+150℃

Current Range : 50A

Voltage - Supply : 3V~3.6V

Band Width : 120kHz

Response Time (tr) : 3.6us

Sensitivity : 39.6mV/A

Bidirectional Current Detection : Not supported

Description : 50A 39.6mV/A PSOF-7 Current Sensors RoHS

Mfr. Part # : ACS781LLRTR-050U-T

Model Number : ACS781LLRTR-050U-T

Package : PSOF-7

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Product Overview

The Allegro ACS781xLR is a fully integrated, automotive-grade linear Hall-effect current sensor IC designed for accurate measurement of bidirectional AC and DC currents up to 100 A. Housed in a compact, low-profile (1.5 mm thick) core-less package, it offers a small footprint and ultra-low power loss due to its 200 internal conductor resistance. The device leverages Hall sensor technology with common-mode field rejection for optimal performance in the presence of interfering magnetic fields. It features a precision, low-offset linear Hall circuit with a factory-programmed sensitivity and quiescent output voltage. Advanced technologies like chopper-stabilized signal path and digital temperature compensation ensure stability across its operating temperature range. The integrated shield provides high-level immunity to current conductor dV/dt and stray electric fields, making it suitable for high-side, high-voltage applications. The output voltage (VOUT) varies linearly with the primary current (IP), with a positive slope for increasing current.

Product Attributes

Brand: Allegro
Package Type: 7-pin PSOF (Suffix LR)
Certifications: AEC-Q100 automotive qualification
Material: Lead (Pb) free, 100% matte tin plating, oxygen-free copper leadframe
Core: Core-less package

Technical Specifications

Model	Sensed Current (IP)	Sensitivity (Typ.)	Operating Temperature	Package
ACS781LLRTR-050B-T	Bidirectional 50 A	26.4 mV/A	40 to 150 C	7-pin PSOF
ACS781LLRTR-050U-T	Unidirectional 0 to 50 A	39.6 mV/A	40 to 150 C	7-pin PSOF
ACS781LLRTR-100B-T	Bidirectional 100 A	13.2 mV/A	40 to 150 C	7-pin PSOF
ACS781LLRTR-100U-T	Unidirectional 0 to 100 A	26.4 mV/A	40 to 150 C	7-pin PSOF
ACS781KLRTR-150B-T	Bidirectional 150 A (transient), 100 A (continuous)	8.8 mV/A	40 to 125 C	7-pin PSOF
ACS781KLRTR-150U-T	Unidirectional 0 to 150 A (transient), 0 to 100 A (continuous)	17.6 mV/A	40 to 125 C	7-pin PSOF

Characteristic	Symbol	Conditions	Min.	Typ.	Max.	Unit
Supply Voltage	VCC		3	3.3	3.6	V
Supply Current	ICC	Output open		11	15	mA
Internal Conductor Resistance	RPRIMARY	TA = 25C		200
Bandwidth	BWi	Small signal 3 dB, CL = 1 nF, TA = 25C		120		kHz
Output Rise Time	tr	TA = 25C, CL = 1 nF		3		s
Response Time	tRESPONSE	TA = 25C, CL = 1 nF		3.6		s
Quiescent Output Voltage (Bidirectional)	VOUT(QBI)	IP = 0 A, TA = 25C		VCC/2		V
Quiescent Output Voltage (Unidirectional)	VOUT(QU)	IP = 0 A, TA = 25C		VCC 0.1		V
Package Thermal Resistance	RJA	Mounted on Allegro evaluation board		18		C/W
Maximum Junction Temperature	TJ(max)				165	C

2410010330_ALLEGRO-ACS781LLRTR-050U-T_C163300.pdf

Precision linear Hall effect current sensor ALLEGRO ACS781LLRTR-050U-T with coreless compact package design Images

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