ACS724

Automotive-Grade, Galvanically Isolated Current Sensor IC

ACS724LLC

Automotive-Grade, Galvanically Isolated Current Sensor IC With Common-Mode Field Rejection in a Small-Footprint SOIC8 Package; \n? AEC-Q100 qualified?\n? Differential Hall sensing rejects common-mode fields\n? 1.2?mΩ primary conductor resistance for low power loss and high inrush current withstand capability\n? Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients\n? Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques\n? High-bandwidth 120?kHz analog output for faster response times in control applications\n? Filter pin allows user to filter the output for improved resolution at lower bandwidth\n? Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor\n? Small footprint, low-profile SOIC8 package suitable for space-constrained applications\n? Filter pin simplifies bandwidth limiting for better resolution at lower frequencies\n? 5?V, single supply operation\n? Output voltage proportional to AC or DC current\n? Factory-trimmed sensitivity and quiescent output voltage for improved accuracy\n? Chopper stabilization results in extremely stable quiescent output voltage\n? Nearly zero magnetic hysteresis\n? Ratiometric output from supply voltage\n;

The Allegro ACS724 current sensor IC is an economical andprecise solution for AC or DC current sensing in industrial,automotive, commercial, and communications systems. Thesmall package is ideal for space-constrained applicationswhile also saving costs due to reduced board area. Typicalapplications include motor control, load detection andmanagement, switched-mode power supplies, and overcurrentfault protection.\n\n The device consists of a precise, low-offset, linear Hallsensor circuit with a copper conduction path located near thesurface of the die. Applied current flowing through this copperconduction path generates a magnetic field which is sensedby the integrated Hall IC and converted into a proportionalvoltage. The current is sensed differentially in order to rejectcommon-mode fields, improving accuracy in magneticallynoisy environments. The inherent device accuracy is optimizedthrough the close proximity of the magnetic field to the Halltransducer. A precise, proportional voltage is provided by thelow-offset, chopper-stabilized BiCMOS Hall IC, which isprogrammed for accuracy after packaging. The output of thedevice has a positive slope when an increasing current flowsthrough the primary copper conduction path (from pins 1 and2, to pins 3 and 4), which is the path used for current sensing.The internal resistance of this conductive path is 1.2?mΩ typical,providing low power loss.\n\n The terminals of the conductive path are electrically isolatedfrom the sensor leads (pins 5 through 8). This allows theACS724 current sensor IC to be used in high-side current senseapplications without the use of high-side differential amplifiersor other costly isolation techniques.\n\n The ACS724 is provided in a small, low-profile surface-mount SOIC8package. The leadframe is plated with 100% matte tin, which iscompatible with standard lead (Pb) free printed circuit board assemblyprocesses. Internally, the device is Pb-free, except for flip-chip high-temperaturePb-based solder balls, currently exempt from RoHS.The device is fully calibrated prior to shipment from the factory.\n\n

ACS724LMA

Automotive-Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package; ? AEC-Q100 qualified \r\n? Differential Hall sensing rejects common-mode fields\r\n? 1.2 mΩ primary conductor resistance for low power loss and high inrush current withstand capability\r\n? Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients\r\n? Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques\r\n? High-bandwidth 120 kHz analog output for faster response times in control applications\r\n? Filter pin allows user to filter the output for improved resolution at lower bandwidth\r\n? Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor\r\n? Filter pin simplifies bandwidth limiting for better resolution at lower frequencies\r\n? 5 V, single supply operation;

The Allegro ACS724/ACS725 family of current sensor ICs are economical and precise solutions for AC or DC current sensing in industrial, automotive, consumer, and communications systems. They are offered in multiple compact packages that offer high level of integration that fits various applications needs.. These devices consist 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 conduction 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 stray fields, improving accuracy in magnetically noisy environments. The current conductor is inherently isolated from the device signal leads due to it’s internal structure which results in high isolation voltage rating for the various offered packages. All of these devices offer very low ohmic losses as low as 265 μΩ.\r\n\r\n The ACS724/ACS725 devices are provided in small, low-profile surface-mount SOIC8 (LC) and custom SOIC16 packages (MA & MC). The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. \r\n\r\n The MA & LC packages offer high Isolation voltage with a max nominal current of 50A, while the MC (20Mil) package offers up to 90A nominal current measurement. These current ratings vary depending on the ambient operating temperatures.

ACS724LMC

High Accuracy Hall-Effect-Based Current Sensor with 265 μΩ Integrated Conductor; \n? AEC-Q100 qualified?\n? Differential Hall sensing rejects common-mode fields\n? 1.2?mΩ primary conductor resistance for low power loss and high inrush current withstand capability\n? Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients\n? Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques\n? High-bandwidth 120?kHz analog output for faster response times in control applications\n? Filter pin allows user to filter the output for improved resolution at lower bandwidth\n? Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor\n? Small footprint, low-profile SOIC8 package suitable for space-constrained applications\n? Filter pin simplifies bandwidth limiting for better resolution at lower frequencies\n? 5?V, single supply operation\n? Output voltage proportional to AC or DC current\n? Factory-trimmed sensitivity and quiescent output voltage for improved accuracy\n? Chopper stabilization results in extremely stable quiescent output voltage\n? Nearly zero magnetic hysteresis\n? Ratiometric output from supply voltage\n;

The Allegro ACS724 current sensor IC is an economical andprecise solution for AC or DC current sensing in industrial,automotive, commercial, and communications systems. Thesmall package is ideal for space-constrained applicationswhile also saving costs due to reduced board area. Typicalapplications include motor control, load detection andmanagement, switched-mode power supplies, and overcurrentfault protection.\n\n The device consists of a precise, low-offset, linear Hallsensor circuit with a copper conduction path located near thesurface of the die. Applied current flowing through this copperconduction path generates a magnetic field which is sensedby the integrated Hall IC and converted into a proportionalvoltage. The current is sensed differentially in order to rejectcommon-mode fields, improving accuracy in magneticallynoisy environments. The inherent device accuracy is optimizedthrough the close proximity of the magnetic field to the Halltransducer. A precise, proportional voltage is provided by thelow-offset, chopper-stabilized BiCMOS Hall IC, which isprogrammed for accuracy after packaging. The output of thedevice has a positive slope when an increasing current flowsthrough the primary copper conduction path (from pins 1 and2, to pins 3 and 4), which is the path used for current sensing.The internal resistance of this conductive path is 1.2?mΩ typical,providing low power loss.\n\n The terminals of the conductive path are electrically isolatedfrom the sensor leads (pins 5 through 8). This allows theACS724 current sensor IC to be used in high-side current senseapplications without the use of high-side differential amplifiersor other costly isolation techniques.\n\n The ACS724 is provided in a small, low-profile surface-mount SOIC8package. The leadframe is plated with 100% matte tin, which iscompatible with standard lead (Pb) free printed circuit board assemblyprocesses. Internally, the device is Pb-free, except for flip-chip high-temperaturePb-based solder balls, currently exempt from RoHS.The device is fully calibrated prior to shipment from the factory.\n\n

ACS724LMC

High Accuracy Hall-Effect-Based Current Sensor

FEATURESANDBENEFITS ?AEC-Q100automotivequalificationpending ?DifferentialHallsensingrejectscommon-modefields ?UL60950-1(ed.2)andUL62368(ed.1)certification □DielectricStrengthVoltage=5kVRMS □BasicIsolationWorkingVoltage=1140VRMSand 1600VDC □Reinforced

ACS724LMCTR-20AB-T

High Accuracy Hall-Effect-Based Current Sensor

FEATURESANDBENEFITS ?AEC-Q100automotivequalificationpending ?DifferentialHallsensingrejectscommon-modefields ?UL60950-1(ed.2)andUL62368(ed.1)certification □DielectricStrengthVoltage=5kVRMS □BasicIsolationWorkingVoltage=1140VRMSand 1600VDC □Reinforced

ACS724LMCTR-30AB-T

High Accuracy Hall-Effect-Based Current Sensor

FEATURESANDBENEFITS ?AEC-Q100automotivequalificationpending ?DifferentialHallsensingrejectscommon-modefields ?UL60950-1(ed.2)andUL62368(ed.1)certification □DielectricStrengthVoltage=5kVRMS □BasicIsolationWorkingVoltage=1140VRMSand 1600VDC □Reinforced

ACS724LMCTR-65AB-T

High Accuracy Hall-Effect-Based Current Sensor

FEATURESANDBENEFITS ?AEC-Q100automotivequalificationpending ?DifferentialHallsensingrejectscommon-modefields ?UL60950-1(ed.2)andUL62368(ed.1)certification □DielectricStrengthVoltage=5kVRMS □BasicIsolationWorkingVoltage=1140VRMSand 1600VDC □Reinforced

ACS724KMA

High-Accuracy, Hall-Effect-Based Current Sensor IC

ACS724LMA

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with Common-Mode Field Rejection in High-Isolation SOIC16 Package