Current Sensor: ACS754xCB-130 The Allegro ACS754 family of current sensors provides economical and precise solutions for current sensing in industrial, commercial, and communications systems. The device package allows easy implementation by the customer. Typical applications include: motor control, load detection and management, power distribution, and overcurrent fault protection. 5 4 1 2 The sensor consists of a precision linear Hall IC, which is optimized to an internal magnetic circuit to increase device sensitivity. The combination of a precisely controlled self-aligning assembly process (patents pending), and the factory-programmed precision of the linear Hall sensor, result in high-level performance and product uniformity. 3 Package CB-PFF 5 4 1 2 The output of this device has a positive slope (>VCC 2) when an increasing current flows from terminal 4 to terminal 5. 3 Package CB-PSF 5 4 1 2 3 Package CB-PSS Pin 1: VCC Pin 2: GND Pin 3: VOUT Terminal 4: IP+ Terminal 5: IP- ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC .......................................... 16 V Output Voltage, VOUT ........................................ 16 V Output Current Source, IOUT(Source) ................. 3 mA Output Current Sink, IOUT(Sink) .......................10 mA Operating Temperature, Ambient, TA, L range ..................... -40 to 150C Ambient, TA, S range ....................... -20 to 85C Maximum Junction, TJ(max)............................. 165C Maximum Storage Temperature, TS ............... 170C TUV America Certificate Number: U8V 04 11 54214 001 ACS754130-DS The primary conductor used for current sensing (terminals 4 and 5) is designed for extremely low power loss. These power terminals also are electrically isolated from the sensor leads (pins 1, 2, and 3). This allows the ACS754 family of sensors to be used in applications requiring electrical isolation, without using optoisolators or other costly isolation techniques. The ACS754 family is provided in lead-free packages (leadframe coating 100% matte tin). Features and Benefits * * * * * * * * * * Monolithic Hall IC for high reliability Single +5 V supply High isolation voltage Automotive temperature range End-of-line factory-trimmed for gain and offset Ultra-low power loss: low resistance of primary conductor Ratiometric output from supply voltage Low thermal drift of offset voltage On-chip transient protection Small package size, with easy mounting capability Applications * Automotive systems * Industrial systems * Motor control * Servo systems * Power conversion * Battery monitors Use the following complete part numbers when ordering: Part Number ACS754LCB-130-PFF ACS754LCB-130-PSF ACS754LCB-130-PSS ACS754SCB-130-PFF ACS754SCB-130-PSF ACS754SCB-130-PSS Signal Pins Formed Formed Straight Formed Formed Straight Terminals Formed Straight Straight Formed Straight Straight Ambient -40 to 150C -20 to 85C 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Functional Block Diagram IP- Terminal 5 +5V VCC Amp Filter Dynamic Offset Cancellation Pin 1 Out VOUT Pin 3 0.1 F GND Pin 2 IP+ Terminal 4 2 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 ELECTRICAL CHARACTERISTICS, over operating ambient temperature range unless otherwise stated Characteristic Symbol Test Conditions Min. Primary Sensed Current IP -130 Supply Voltage VCC 4.5 Supply Current ICC Vcc = 5.0 V, output open 6.5 Output Resistance ROUT IOUT = 1.2 mA - Primary Conductor Resistance RPRIMARY IP = 100A; TA = 25C - Isolation Voltage VISO Pins 1-3 and 4-5; 60 Hz, 1 minute 3.0 PERFORMANCE CHARACTERISTICS, -20C to +85C, VCC = 5 V unless otherwise specified Propagation time tPROP IP = 50 A, T = 25C - Response time tRESPONSE IP = 50 A, T = 25C - Rise time tr Frequency Bandwidth f IP = 50 A, T = 25C - -3 dB , T = 25C - IP , T = 25C - Sensitivity Sens IP 14.2 Peak-to-peak, T = 25C, Noise VNOISE - no external filter Nonlinearity ELIN IP - Symmetry ESYM IP 98 Zero Current Output Voltage VOUT(Q) I = 0 A, T = 25C - I = 0 A, T = 25C -10 Electrical Offset Voltage VOE (Magnetic error not included) I=0A -20 Magnetic Offset Error VOM I = 0 A, after excursion of 130 A - IP , T = 25C - Total Output Error ETOT (Including all offsets) IP - PERFORMANCE CHARACTERISTICS, -40C to +150C, VCC = 5 V unless otherwise specified Propagation time tPROP IP = 50 A, T = 25C - Response time Typ. - 5.0 8 1 100 - Max. 130 5.5 10 2 - - Units A V mA kV 4 11 - - s s 10 - s 35 15 - - - 15.8 kHz mV/A mV/A 40 - mV - 100 2.5 - - 0.1 1.0 - 0.8 102 - 10 20 0.30 - 5.1 % % V mV mV A % % 4 - s s tRESPONSE IP = 50 A, T = 25C - 11 - Rise time tr IP = 50 A, T = 25C - 10 - s Frequency Bandwidth f -3 dB , T = 25C IP , T = 25C IP Peak-to-peak, T = 25C, no external filter IP IP I = 0 A, T = 25C I = 0 A, T = 25C I=0A I = 0 A, after excursion of 130 A IP , T = 25C IP - - 13.8 35 15 - - - 16.2 kHz mV/A mV/A - 40 - mV - 98 - -10 -35 - - - - 100 2.5 - - 0.1 1.0 - 1.5 102 - 10 35 0.40 - 8.0 % % V mV mV A % % Sensitivity Sens Noise VNOISE Nonlinearity Symmetry Zero Current Output Voltage ELIN ESYM VOUT(Q) Electrical Offset Voltage (Magnetic error not included) VOE Magnetic Offset Error VOM Total Output Error (Including all offsets) ETOT 3 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Definitions of Accuracy Characteristics Sensitivity (Sens): The change in sensor output in response to a 1 A change through the primary conductor. The sensitivity is the product of the magnetic circuit sensitivity (G / A) and the linear IC amplifier gain (mV/G). The linear IC amplifier gain is trimmed at the factory to optimize the sensitivity (mV/A) for the full-scale current of the device. Noise (VNOISE): The product of the linear IC amplifier gain (mV/G) and the noise floor for the Allegro Hall effect linear IC (1 G). The noise floor is derived from the thermal and shot noise observed in Hall elements. Dividing the noise (mV) by the sensitivity (mV/ A) provides the smallest current that the device is able to resolve. Linearity (ELIN): The degree to which the voltage output from the sensor varies in direct proportion to the primary current through its full-scale amplitude. Linearity reveals the maximum deviation from the ideal transfer curve for this transducer. Nonlinearity in the output can be attributed to the gain variation across temperature and saturation of the flux concentrator approaching the full-scale current. The following equation is used to derive the linearity: { [ 100 1- where gain % sat ( Vout_full-scale amperes - VOUT(Q) ) 2 (Vout_half-scale amperes - VOUT(Q) ) [{ gain = the gain variation as a function of temperature changes from 25C, % sat = the percentage of saturation of the flux concentrator, which becomes significant as the current being sensed approaches full-scale IP , and Vout_full-scale amperes = the output voltage (V) when the sensed current approximates full-scale IP . Symmetry (ESYM): The degree to which the absolute voltage output from the sensor varies in proportion to either a positive or negative full-scale primary current. The following equation is used to derive symmetry: 100 [ Vout_+full-scale amperes - VOUT(Q) VOUT(Q) -Vout_-full-scale amperes [ Quiescent output voltage (VOUT(Q)): The output of the sensor when the primary current is zero. For a unipolar supply voltage, it nominally remains at VCC 2. Thus, VCC = 5 V translates into VOUT(Q) = 2.5 V. Variation in VOUT(Q) can be attributed to the resolution of the Allegro linear IC quiescent voltage trim, magnetic hysteresis, and thermal drift. Electrical offset voltage (VOE): The deviation of the device output from its ideal quiescent value of VCC 2 due to nonmagnetic causes. Magnetic offset error (VOM): The magnetic offset is due to the residual magnetism (remnant field) of the core material. The magnetic offset error is highest when the magnetic circuit has been saturated, usually when the device has been subjected to a full-scale or highcurrent overload condition. The magnetic offset is largely dependent on the material used as a flux concentrator. The larger magnetic offsets are observed at the lower operating temperatures. Accuracy (ETOT): The accuracy represents the maximum deviation of the actual output from its ideal value. This is also known as the total ouput error. The accuracy is illustrated graphically in the Output Voltage versus Current chart on the following page. Accuracy is divided into four areas: * 0 A at 25C: Accuracy of sensing zero current flow at 25C, without the effects of temperature. * 0 A over temperature: Accuracy of sensing zero current flow including temperature effects. * Full-scale current at 25C: Accuracy of sensing the full-scale current at 25C, without the effects of temperature. * Full-scale current over temperature: Accuracy of sensing full-scale current flow including temperature effects. 4 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Output voltage vs. current, illustrating sensor accuracy at 0 A and at full-scale current Increasing VOUT (V) Accuracy Over Temperature Accuracy 25C Only Average VOUT Accuracy Over Temperature Accuracy 25C Only -IP (A) 130 A -130 A +IP (A) Full Scale 0A Accuracy 25C Only Accuracy Over Temperature Decreasing VOUT (V) 5 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Definitions of Dynamic Response Characteristics Propagation delay (tPROP): The time required for the sensor output to reflect a change in the primary current signal. Propagation delay is attributed to inductive loading within the linear IC package, as well as in the inductive loop formed by the primary conductor geometry. Propagation delay can be considered as a fixed time offset and may be compensated. I (%) Primary Current 90 Transducer Output 0 Propagation Time, tPROP t Response time (tRESPONSE): The time interval between a) when the primary current signal reaches 90% of its final value, and b) when the sensor reaches 90% of its output corresponding to the applied current. I (%) Primary Current 90 Transducer Output 0 Response Time, tRESPONSE t Rise time (tr): The time interval between a) when the sensor reaches 10% of its full scale value, and b) when it reaches 90% of its full scale value. The rise time to a step response is used to derive the bandwidth of the current sensor, in which (-3 dB) = 0.35 / tr. Both tr and tRESPONSE are detrimentally affected by eddy current losses observed in the conductive IC ground plane and, to varying degrees, in the ferrous flux concentrator within the current sensor package. I (%) Primary Current 90 Transducer Output 10 0 Rise Time, tr t 6 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Standards and Physical Specifications Parameter Specification Flammability (package molding compound) UL recognized to UL 94V-0 Fire and Electric Shock UL60950-1:2003 EN60950-1:2001 CAN/CSA C22.2 No. 60950-1:2003 Creepage distance, current terminals to sensor pins 7.25 mm Clearance distance, current terminals to sensor pins 7.25 mm Package mass 4.63 g typical Step Response, IP = 0 to 130 A, no external filter ACS754 Output (mV) Excitation Signal 7 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Package CB-PFF 8 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc. Current Sensor: ACS754xCB-130 Package CB-PSF Package CB-PSS The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in lifesupport devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. 9 ACS754130-DS 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 2003, Allegro MicroSystems, Inc.