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1、The AllegroACS724KMA current sensor IC is an economical and precise solution for AC or DC current sensing in industrial, commercial, and communication systems. The small package is ideal for space-constrained applications while also saving costs due to reduced board area. Typical applications includ
2、e motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper condu
3、ction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. The current is sensed differentially in order to reject common-mode fields, improving accuracy in magnetically noisy environments. The inherent device accuracy is optimized thro
4、ugh the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which includes Allegros patented digital temperature compensation, resulting in extremely accurate performance over temperature. The
5、 output of the device has a positive slope when an increasing current flows through the primary copper conduction path (from pins 1 through 4, to pins 5 through 8), which is the path used for current sensing. The internal resistance of this conductive path is 0.85 m typical, providing low power loss
6、.The terminals of the conductive path are electrically isolated from the sensor leads (pins 9 through 16). This allows the ACS724KMA current sensor IC to be used in high-side current ACS724KMA-DS, Rev. 2 Differential Hall sensing rejects common-mode fields Patented integrated digital temperature com
7、pensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor UL60950-1 (ed. 2) certified Dielectric Strength Voltage = 4.8 kVRMS Basic Isolation Working Voltage = 1097 VRMS Reinforced Isolation Working Voltage = 565 VRMS Industry-leading noise performance with gre
8、atly improved bandwidth through proprietary amplifier and filter design techniques Filter pin allows user to filter output for improved resolution at lower bandwidth 0.85 m primary conductor resistance for low power loss and high inrush current withstand capability Low-profile SOIC16 package suitabl
9、e for space-constrained applications 4.5 to 5.5 V single supply operation Output voltage proportional to AC or DC currentHigh-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 PackageContinued on the next pagePackage: 16-pin SOICW (suffix MA)Typi
10、cal Application15263748+IPIPCLCBYPASS0.1 FIPIP+IP+IP+IP+IPIPIPIPNCGNDNCFILTERVIOUTNCVCCNC910111213141516ACS724KMACF1 nFThe ACS724KMA outputs an analog signal, VIOUT, that changes proportionally with the bidirectional AC or DC primary sensed current, IP, within the specified measure-ment range. The F
11、ILTER pin can be used to decrease the bandwidth in order to optimize the noise performance.Continued on the next pageFEATURES AND BENEFITSDESCRIPTIONCB Certificate Number:US-22339-A1-ULTV America Certificate Number: U8V 14 11 54214 030 CB 14 11 54214 029TypetestedNot to scaleACS724KMAHigh-Accuracy,
12、Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 PackageACS724KMA2Allegro MicroSystems, LLC115 Northeast CutoffWorcester, Massachusetts 01615-0036 U.S.A.1.508.853.5000; sense applications without the use of high-side differential amplifiers or other costl
13、y isolation techniques.The ACS724KMA is provided in a low-profile surface-mount SOIC16 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free. The device is fully calibrated pr
14、ior to shipment from the factory.DESCRIPTION (continued) Factory-trimmed sensitivity and quiescent output voltage for improved accuracy Chopper stabilization results in extremely stable quiescent output voltage Nearly zero magnetic hysteresis Ratiometric output from supply voltageFEATURES AND BENEFI
15、TS (continued)SELECTION GUIDEPart Number IPR(A)Sens(Typ) at VCC= 5 V (mV/A)TA(C) Packing1ACS724KMATR-20AB-T 20 10040 to 125 Tape and Reel, 3000 pieces per reelACS724KMATR-30AB-T 30 66ACS724KMATR-30AU-T 30 132ACS724KMATR-65AB-T 65 30.751Contact Allegro for additional packing options.High-Accuracy, Ha
16、ll-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 PackageACS724KMA3Allegro MicroSystems, LLC115 Northeast CutoffWorcester, Massachusetts 01615-0036 U.S.A.1.508.853.5000; THERMAL CHARACTERISTICSCharacteristic Symbol Test Conditions* Value UnitsPackage Thermal Resistance (Junction to Ambient)RJAMounted on the Allegro 85-0738 evaluation board with 700 mm2of 4 oz. copper o
