Datasheet ACS724 (Allegro) - 5

Automotive-Grade, Galvanically Isolated Current Sensor IC ACS724 with Common-Mode Field Rejection in a Small-Footprint SOIC8 Package COMMON ELECTRICAL CHARACTERISTICS [1]: Valid through the full range of TA , VCC = 5 V, CF = 0, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. Max. Unit
Supply Voltage VCC 4.5 – 5.5 V Supply Current ICC VCC = 5 V, output open – 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 – 1.2 – mΩ Internal Filter Resistance [2] RF(int) – 1.8 – kΩ Common Mode Field Rejection Ratio CMFRR Uniform external magnetic field – 40 – dB Primary Hall Coupling Factor G1 TA = 25°C – 11 – G/A Secondary Hall Coupling Factor G2 TA = 25°C – 2.8 – G/A Hall Plate Sensitivity Matching Sensmatch TA = 25°C – ±1 – % 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 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 – 150 – µA(rms)/ √Hz Noise I Input-referenced noise: CF = 4.7 nF, N CL = 1 nF, BW = 18 kHz, TA = 25°C – 20 – mA(rms) Nonlinearity ELIN Through full range of IP –1.5 – +1.5 % 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 – VCC – 0.3 – V VOL RL = 4.7 kΩ – 0.3 – 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