Datasheet ACS724KMA (Allegro) - 5

High-Accuracy, Hall-Effect-Based Current Sensor IC ACS724KMA with Common-Mode Field Rejection in High-Isolation SOIC16 Package COMMON ELECTRICAL CHARACTERISTICS [1]: Valid through the full range of TA = –40°C to 125°C and VCC = 5 V, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage VCC 4.5 5 5.5 V Supply Current ICC VCC within VCC(min) and VCC(max) – 10 14 mA Output Capacitance Load CL VIOUT to GND – – 10 nF Output Resistive Load RL VIOUT to GND 4.7 – – kΩ Primary Conductor Resistance RIP TA = 25°C – 0.85 – mΩ Internal Filter Resistance [2] RF(INT) – 1.7 – kΩ Common Mode Field Rejection Ratio CMFRR Uniform external magnetic field – 40 – dB Primary Hall Coupling Factor G1 TA = 25°C – 4.5 – G/A Secondary Hall Coupling Factor G2 TA = 25°C – 0.5 – G/A Hall Plate Sensitivity Matching SensMATCH TA = 25°C – ±1 – % Hysteresis IHYS Difference in offset after a ±40 A pulse – 150 – mA Rise Time tr IP = IP(max), TA = 25°C, CL = 1 nF – 3 – μs Propagation Delay tpd IP = IP(max), TA = 25°C, CL = 1 nF – 2 – μs Response Time tRESPONSE IP = IP(max), TA = 25°C, CL = 1 nF – 4 – μs Internal Bandwidth BW Small signal –3 dB, CL = 1 nF – 120 – kHz Noise Density I Input-referenced noise density; ND TA = 25°C, CL = 1 nF – 450 – µARMS/ √Hz Noise I Input-referenced noise; CF = 4.7 nF, N CL = 1 nF, BW = 18 kHz, TA = 25°C – 60 – mARMS Nonlinearity ELIN Through full range of IP – ±1 % Sensitivity Ratiometry Coefficient SENS_RAT_ COEF VCC = 4.5 to 5.5 V, TA = 25°C – 1.3 – – Zero-Current Output Ratiometry Coefficient QVO_RAT_ COEF VCC = 4.5 to 5.5 V, TA = 25°C – 1 – – V Saturation Voltage [3] OH RL = 4.7 kΩ, TA = 25°C VCC – 0.5 – – V VOL RL = 4.7 kΩ, TA = 25°C – – 0.5 V Power-On Time t Output reaches 90% of steady-state PO level, TA = 25°C, IP = IPR(max) applied – 80 – μs Shorted Output to Ground Current ISC(GND) TA = 25°C – 3.3 – mA Shorted Output to VCC Current ISC(VCC) TA = 25°C – 45 – mA [1] Device may be operated at higher primary current levels, IP , ambient temperatures, TA , and internal leadframe temperatures, provided the Maximum Junction Tempera- ture, TJ(max), is not exceeded. [2] RF(INT) forms an RC circuit via the FILTER pin. [3] The sensor IC will continue to respond to current beyond the range of IP until the high or low saturation voltage; however, the nonlinearity in this region will be worse than through the rest of the measurement range. 5 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com