Datasheet ACS37002 (Allegro) - 7

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400 kHz, High Accuracy Current Sensor ACS37002 with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package COMMON ELECTRICAL CHARACTERISTICS: Valid through full operating temperature range, TA = – 40°C to 150°C, CBYPASS = 0.1 μF, and VCC = 5 V or 3.3 V, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. Max. Units
5 V devices only 4.5 5 5.5 V Supply Voltage VCC 3.3 V devices only 3 3.3 3.6 V No load on VIOUT or VREF; V Supply Current I CC = 5 V – 13 18 mA CC No load on VIOUT or VREF; VCC = 3.3 V – 12 15 mA Supply Bypass Capacitor CBYPASS VCC to GND recommended – 0.1 – µF Output Resistive Load RL VIOUT to GND, VIOUT to VCC 10 – – kΩ Output Capacitive Load CL VIOUT to GND – 1 6 nF Reference Resistive Load RVREF VREF to GND (recommended for VOC supply); VREF to VCC 10 62.7 – kΩ Reference Capacitive Load CVREF VREF to GND – – 6 nF Fault Pull-Up Resistance RPU 4.7 – 500 kΩ VOC Capacitive Load CVOC VOC to GND – – 1 nF Primary Conductor Resistance RIP TA = 25°C – 0.85 – mΩ Primary Conductor Inductance LIP – 4.2 – nH V Power-On Reset Voltage POR(H) TA = 25°C, VCC rising [1] 2.6 2.9 3.2 V VPOR(L) TA = 25°C, VCC falling [1] 2.2 2.5 2.8 V POR Hysteresis VPOR(HYS) 250 – – mV Power-On Time t Time from VCC rising ≥ VUVD(DIS) after a POR event until POD power-on; VREF, OCF, VIOUT – 100 – μs Undervoltage Detection VUVD(L) TA = 25°C, VCC falling [1] 3.8 – 4.3 V (UVD) Threshold [2] VUVD(H) TA = 25°C, VCC rising [1] 4 – 4.5 V UVD Hysteresis [2] VUVD(HYS) – 250 – mV t UVD Delay Time [2] dUVD(E) Time from VCC falling ≤ VUVD(EN) until UVD asserts 35 64 120 µs tdUVD(D) Time from VCC rising ≥ VUVD(DIS) until UVD clears – 7 – µs Overvoltage Detection (OVD) VOVD(H) TA = 25°C, VCC rising [1] 6.1 6.3 6.8 V Threshold VOVD(L) TA = 25°C, VCC falling [1] 5.6 5.8 6.1 V Overvoltage Detection Hysteresis VOVD(HYS) – 660 – V t OVD Delay Time dOVD(E) Time from VCC rising ≥ VOVD(EN) until OVD asserts 35 90 120 µs tdOVD(D) Time from VCC falling ≤ VOVD(DIS) until OVD clears – 7 – µs Continued on the next page… 7 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Document Outline Features and Benefits Description Packages Selection guide Absolute Maximum Ratings Isolation Characteristics MA Package Specific Performance LA Package Specific Performance Pinout Diagram and Terminal List Functional Block Diagram Common Electrical Characteristics Performance Characteristics Functional Description Power-On Reset Operation Power-On Power-Off Power-On Timing Power-On Reset (POR) Overvoltage and Undervoltage Detection Undervoltage Detection Voltage Thresholds (VUVD(H/L)) Overvoltage Detection Voltage Thresholds (VOVD(H/L)) Overvoltage/Undervoltage Detection Hysteresis (VOVDHys, VUVDHys) Overvoltage and Undervoltage Enable and Disable Time (tOVD(E/D), tUVD(E/D)) Supply Zener Clamp Voltages Absolute Maximum Ratings Forward and Reverse Supply Voltage Forward and Reverse Output Voltage Forward and Reverse Reference/Fault Voltage Output Source and Sink Current Definitions of Operating and PErformance Characteristics Zero Current Voltage Output (VIOUT(Q), QVO) QVO Temperature Drift (VQE) Reference Voltage (VREF) Reference Voltage Temperature Drift (VRE) Offset Voltage (VOE) Output Saturation Voltage (VSAT(HIGH/LOW)) Sensitivity (Sens) Sensitivity Error (Esens) Gain Selection Pins Full Scale (FS) Nonlinearity (ELIN) Total Output Error (ETOT) Power Supply Offset Error (VPS) Offset Power Supply Rejection Ratio (PSRRO) Power Supply Sensitivity Error (EPS) Sensitivity Power Supply Rejection Ratio (PSRRS) Fault Behavior Overcurrent Fault (OCF) Overcurrent Fault Operating Range/Point (IOCF-OR, IOCF-OP) Overcurrent Fault Hysteresis (IOCF-Hyst) Voltage Overcurrent Pin (VOC) OverCurrent Fault Error (EOCF) OverCurrent Fault Response Time (tOCF) OverCurrent Fault Reaction Time (tOCF-R) OverCurrent Fault Mask Time (tOCF-MASK) OverCurrent Fault Hold Time (tOCF-HOLD) OverCurrent Fault Persist OCF Disable Dynamic Response Parameters Propagation Time (tpd) Rise Time (tR) Response Time (tRESPONSE) Overshoot Settling Time Temperature Compensation Temperature Compensation Update Rate Application and Theory Application Circuits Theory and Functionality – VOC and OCF VOC Driven by Non-Inverting Buffered VREF Power Supply Decoupling Capacitor and Output Capacitive Loads Dynamically Change Gain in a System Thermal Performance Thermal Rise vs. Primary Current Evaluation Board Layout Package Outline Drawings MA Package LA Package