Datasheet ACS37002 (Allegro) - 10

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400 kHz, High Accuracy Current Sensor ACS37002 with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package ACS37002LMA-050B5
Gain_Sel Pin Performance Key Selection Identifier
Parameter (Units) Gain_Sel_1 (Boolean) Gain_Sel_0 (Boolean) Gain (mV/A) Max IP (A) Type Digital Input Digital Input Calculation Bidirectional
0 0 40 50 Selection 0 1 50 40 Combination 1 0 60 33.3 1 1 30 66.7
ACS37002LMA-050B5 PERFORMANCE CHARACTERISTICS:
Valid through full operating temperature range, TA = – 40°C to 150°C, CBYPASS = 0.1 µF, and VCC = 5 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. [1] Max. Units NOMINAL PERFORMANCE
Gain Sel 00 –50 – 50 A Gain Sel 01 –40 – 40 A Current Sensing Range IPR Gain Sel 10 –33.3 – 33.3 A Gain Sel 11 –66.7 – 66.7 A Gain Sel 00; IPR(min) < IP < IPR(max) – 40 – mV/A Gain Sel 01; I Sensitivity Sens PR(min) < IP < IPR(max) – 50 – mV/A Gain Sel 10; IPR(min) < IP < IPR(max) – 60 – mV/A Gain Sel 11; IPR(min) < IP < IPR(max) – 30 – mV/A Overcurrent Fault Operating Range IOCF-OR Typ. = factory-programmed default, FS = Full-Scale 50 100 200 %FS Zero Current Output Voltage VIOUT(Q) Bidirectional; IP = 0 A, TA = 25°C – 2.5 – V
TOTAL ERROR (VIOUT(ACTUAL) – (Sens(IDEAL) × IPR + VREF)) / (Sens(IDEAL) × IPR) × 100 AND TOTAL ERROR COMPONENTS
Total Error ETOT IP = IPR(max) –1.75 ±1.4 1.75 % I Sensitivity Error E P = IPR(max), TA = 25°C to 150°C –1.5 ±1.3 1.5 % SENS IP = IPR(max), TA = –40°C to 25°C –1.5 ±1.2 1.5 % V Zero Current Reference Error V REFactual – VREFideal, IP = 0 A, TA = 25°C to 150°C –10 ±4 10 mV RE VREFactual – VREFideal, IP = 0 A, TA = –40°C to 25°C –10 ±5 10 mV V Offset Error V IOUT(Q) – VREF, IP = 0 A, TA = 25°C to 150°C –8 ±4 8 mV OE VIOUT(Q) – VREF, IP = 0 A, TA = –40°C to 25°C –8 ±5 8 mV V QVO Error V IOUT(Q), IP = 0 A, TA = 25°C to 150°C –10 ±6 10 mV QE VIOUT(Q), IP = 0 A, TA = –40°C to 25°C –10 ±7 10 mV
TOTAL ERROR AND TOTAL ERROR COMPONENTS INCLUDING LIFETIME DRIFT [2]
Total Error Including Lifetime Drift ETOT_LTD IP = IPR(max) – –2.7 ±0.8 – % I Sensitivity Error Including Lifetime Drift E P = IPR(max), TA = 25°C to 150°C – –1 ±1.2 – % SENS_LTD IP = IPR(max), TA = –40°C to 25°C – –2.7 ±0.8 – % Zero Current Reference Error Including VREFactual – VREFideal, IP = 0 A, TA = 25°C to 150°C – –4 ±6 – mV Lifetime Drift VRE_LTD VREFactual – VREFideal, IP = 0 A, TA = –40°C to 25°C – ±8 – mV V Of set Error Including Lifetime Drift V IOUT(Q) – VREF, IP = 0 A, TA = 25°C to 150°C – ±7 – mV OE_LTD VIOUT(Q) – VREF, IP = 0 A, TA = –40°C to 25°C – ±6 – mV V QVO Error Including Lifetime Drift V IOUT(Q), IP = 0 A, TA = 25°C to 150°C – –5 ±7 – mV QE_LTD VIOUT(Q), IP = 0 A, TA = –40°C to 25°C – ±9 – mV [1] Typicals are based on worse case mean ±3 sigma values during production or production and qualification. [2] Lifetime drift characteristics are based on the commercial qualification results from zero hours reads. Drift is a function of customer application conditions. Contact Allegro MicroSystems for further information. 10 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