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Low offset ac current sensor ic ALLEGRO ACS726LLFTR-20B-T featuring integrated back end amplifier and operation mode

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Low offset ac current sensor ic ALLEGRO ACS726LLFTR-20B-T featuring integrated back end amplifier and operation mode

working temperature : -40℃~+150℃

Current Range : 20A

Voltage - Supply : 3V~3.6V

Sensitivity : 100mV/A

Description : 20A 100mV/A QSOP-24 Current Sensors RoHS

Mfr. Part # : ACS726LLFTR-20B-T

Model Number : ACS726LLFTR-20B-T

Package : QSOP-24

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Product Overview

The Allegro ACS726 current sensor IC family offers economical and precise AC current sensing solutions for industrial, commercial, and communications systems. These galvanically isolated sensors feature a fully differential output for superior immunity to offset drift and common mode noise. The integrated back-end amplifier (BEA) allows for externally adjustable gain and bandwidth via RC networks, and can be powered down to reduce consumption. The device's precise, low-offset Hall sensor circuit, coupled with a low-resistance copper conduction path, ensures accurate current measurement with low power loss. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The ACS726 is available in a small, low-profile QSOP24 package, ideal for space-constrained applications.

Product Attributes

Brand: Allegro
Package Type: QSOP24 (LF)
Lead Finish: 100% matte tin
RoHS Status: Pb-free, excluding flip-chip high-temperature Pb-based solder balls

Technical Specifications

Characteristic	Symbol	Test Conditions*	Min.	Typ.	Max.	Unit
Common Operating Characteristics (Not including BEA)
Supply Voltage	VCC		3	3.3	3.6	V
Supply Current (BEA Disabled)	ICC	VCC = 3.3 V, no output load		8	14	23 mA
Supply Current (BEA Enabled)	ICCTOTAL	VCC = 3.0 V to 3.6 V	12	22	40 mA
Primary Conductor Resistance	Rprimary	TA = 25C		1.1		m
Internal Bandwidth	BWi	Small signal 3 dB; TA = 25C, CL = 1 nF		120		kHz
Differential Quiescent Output Voltage	VIOUTdiff(Q)	IP = 0		0		V
ACS726-20B Operating Characteristics (Not including BEA)
Current Sensing Range	IP		20		20	A
Differential Sensitivity	Sensdiff	Across full range of IP, TA = 25C	98	100	102	mV/A
Total Output Error	ErrTOT	IP = 20 A, TA = 25C, BWi = 120 kHz	-3	1	3	%
ACS726-40B Operating Characteristics (Not including BEA)
Current Sensing Range	IP		40		40	A
Differential Sensitivity	Sensdiff	Across full range of IP, TA = 25C	49	50	51	mV/A
Total Output Error	ErrTOT	IP = 40 A, TA = 25C, BWi = 120 kHz	-2.5	1	2.5	%
Differential Back End Amplifier (BEA) Operating Characteristics
Closed Loop Gain	GCL(BEA)		2		10
Bandwidth	BW(BEA)	GCL(BEA) = 2, CL(BEA) = 1 nF		1000		kHz
Linearity	ErrLin(BEA)	GCL(BEA) = 2, Over 2 V differential dynamic range		<0.1		%
Absolute Maximum Ratings
Supply Voltage	VCC	VCC pin			6	V
Electric Strength Test Voltage	VESTV	Between pins 1-12 and 13-24; 60 Hz, 1 minute (Agency Type Test), TA = 25C			2100	VAC
Working Voltage	Vworking	For single protection according to UL 1577 standard			277	VAC
Operating Ambient Temperature	TA	Range L	40		150	C
Maximum Junction Temperature	TJ(max)				165	C
Storage Temperature	Tstg		65		170	C
Thermal Characteristics
Package Thermal Resistance (Junction to Ambient)	RJA	On Allegro ACS726 evaluation board (expected value)		27		C/W

2106080105_ALLEGRO-ACS726LLFTR-20B-T_C2654897.pdf

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