Fully Integrated / Hall Effect-Based Linear Current Sensor

ACS704ELC-015 Fully Integrated, Hall Effect-Based Linear Current Sensor with Voltage Isolation and a Low-Resistance Current Conductor Not for New Design These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: October 31, 2006 Recommended Substitutions: www.DataSheet4U.com For existing customer transition, and for new customers or new applications, refer to the ACS712. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. ACS704ELC-015 Fully Integrated, Hall Effect-Based Linear Current Sensor with Voltage Isolation and a Low-Resistance Current Conductor The Allegro ACS704 family of current sensors provides economical and precise solutions for current sensing in industrial, automotive, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. Pin 8: VCC Pin 7: VOUT Pin 1: IP+ Pin 2: IP+ Pin 3: IP– Pin 4: IP– Pin 6: N.C. Pin 5: GND Package LC Pins 6 and 7 are internally connected in shipping product. For compatibility with future devices, leave pin 6 floating. The device consists of a precision, low-offset linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory. The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is typically 1.5 mΩ, providing low power loss. The thickness of the copper conductor allows survival of the device at up to 3× overcurrent conditions. The terminals of the conductive path are electrically isolated from the sensor leads (pins 5 through 8). This allows the ACS704 family of sensors to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques. The ACS704 is provided in a small, surface mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the flip-chip uses high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory. Nominal Operating Temperature, TA Range E............................................ –40 to 85ºC Overcurrent Transient Tolerance*, IP ................ 60 A *100 total pulses, 250 ms duration each, applied at a rate of 1 pulse every 100 seconds. ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC .......................................... 16 V Reverse Supply Voltage, VRCC ........................ –16 V Output Voltage, VOUT ........................................ 16 V Reverse Output Voltage, VROUT...................... –0.1 V Output Current Source, IOUT(Source) ................. 3 mA Output Current Sink, IOUT(Sink) .......................10 mA Operating Temperature, Maximum Junction, TJ(max)....................... 165°C Storage Temperature, TS ...................... –65 to 170°C Features and Benefits • • • • • • • • • • • • Small footprint, low-profile SOIC8 package 1.5 mΩ internal conductor resistance Excellent replacement for sense resistors 800 VRMS minimum isolation voltage between pins 1-4 and 5-8 4.5 to 5.5 V, single supply operation 50 kHz bandwidth 100 mV/A output sensitivity and 20 A dynamic range Output voltage proportional to ac and dc currents Factory-trimmed for accuracy Extremely stable output offset voltage Near-zero magnetic hysteresis Ratiometric output from supply voltage TÜV America Certificate Number: U8V 04 12 54214 005 Use the following complete part number when ordering: Part Number ACS704ELC-015 Package SOIC8 surface mount ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 Functional Block Diagram +5 V Pin 3 Pin 4 IP– IP– VCC Pin 8 Voltage Regulator To all subcircuits Dynamic Offset Cancellation Amp Filter VOUT Pin 7 Out N.C. Pin 6 A 0.1 μF Gain Temperature Coefficient Offset Trim Control IP+ IP+ Pin 1 Pin 2 GND Pin 5 A Pins 6 and 7 are internally connected in shipping product. For compatibility with future devices, leave pin 6 floating. 2 ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 ELECTRICAL CHARACTERISTICS, over operating ambient temperature range unless otherwise stated Characteristic Symbol Test Conditions Min. 1 Primary Sensed Current IP –15 Supply Voltage VCC 4.5 Supply Current ICC VCC = 5.0 V, output open 5 IOUT = 1.2 mA – Output Resistance ROUT Output Capacitance Load CLOAD VOUT to GND – VOUT to GND 4.7 Output Resistive Load RLOAD Primary Conductor Resistance RPRIMARY TA = 25°C – Isolation Voltage VISO Pins 1-4 and 5-8; 60 Hz, 1 minute 800 PERFORMANCE CHARACTERISTICS, TA = –40°C to 85°C, VCC = 5 V unless otherwise specified Propagation Time tPROP IP =±15 A, TA = 25°C – – Response Time tRESPONSE IP =±15 A, TA = 25°C Rise Time Frequency Bandwidth tr f IP =±15 A, TA = 25°C –3 dB, TA = 25°C; IP is 10 A peak-topeak; no external filter Over full range of IP , IP applied for 5 ms; TA = 25°C Over full range of IP , IP applied for 5 ms; TA = –40 to 85°C Peak-to-peak, TA = 25°C, no external filter Root Mean Square, TA = 25°C, no external filter Over full range of IP , IP applied for 5 ms; TA = –40 to 85°C Over full range of IP , IP applied for 5 ms; TA = –40 to 85°C IP = 0 A, TA = 25°C IP = 0 A, TA = 25°C IP = 0 A, TA = –40 to 85°C IP = 0 A, after excursion of 15 A; TA = –40 to 85°C IP =±15 A , IP applied for 5 ms; TA = 25°C IP = ±10 A , IP applied for 5 ms; TA = –40 to 85°C IP = ±15 A , IP applied for 5 ms; TA = –40 to 85°C – – – 94 – – – 98 – –15 –50 – – – – Typ. – 5.0 8 1 – – 1.5 1200 4 8 9 50 100 – 70 12.5 ±1 100 VCC / 2 – – ±0.01 ±1.5 – – Max. 15 5.5 10 2 10 – – – – – – – – 106 – – ±3.5 102 – 15 50 ±0.05 – ±6.0 ±8.4 Units A V mA Ω nF kΩ mΩ V μs μs μs kHz mV/A mV/A mV mV % % V mV mV A % % % Sensitivity Sens Noise VNOISE Linearity Symmetry Zero Current Output Voltage Electrical Offset Voltage Magnetic Offset Error ELIN ESYM VOUT(Q) VOE IERROM Total Output Error2 ETOT 1Device may be operated at higher primary current, I , and Ambient Temperature, T , levels, provided that the Maximum Junction Temperature, T P A J(max), is not exceeded. 2Percentage of I , with I = 15 A; Output filtered. Up to a 2.0% shift in E P P TOT may be observed at end-of-life for this device. 3 ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 Typical Performance Characteristics Supply Current versus Ambient Temperature VCC = 5 V 10.0 9.6 9.2 8.8 ICC (mA) 8.4 8.0 7.6 7.2 6.8 6.4 6.0 -50 -25 0 25 50 75 100 125 150 TA (°C) Supply Current versus Applied VCC 8.66 8.64 8.62 8.60 8.58 8.56 8.54 8.52 8.50 8.48 8.46 8.44 4.5 4.6 4.7 4.8 4.9 5 VCC (V) 5.1 5.2 5.3 5.4 5.5 ICC (mA) 4 ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 Output Voltage versus Primary Current VCC = 5 V 5.0 4.5 4.0 3.5 VOUT (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 –20 –15 –10 –5 0 IP (A) 5 10 15 20 °C –40 –20 25 85 150 Sensitivity versus Primary Current VCC = 5 V 110 108 106 104 °C –40 –20 25 85 150 Sens (mV/A) 102 100 98 96 94 92 90 –20 –15 –10 –5 0 IP (A) 5 10 15 20 5 ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 Zero Current Output Voltage vs. Ambient Temperature IP = 0 A 2.520 2.516 2.512 VOUT(Q) (V) 2.508 2.504 2.500 2.496 2.492 2.488 2.484 2.480 -50 -25 0 25 50 75 100 125 150 TA (°C) Zero Current Output Currrent versus Ambient Temperature 0.20 0.16 0.12 (Data in above chart converted to amperes) IP = 0 A IVOUT(Q) (A) 0.08 0.04 0 -0.04 -0.08 -0.12 -0.16 -0.20 -50 -25 0 25 50 75 100 125 150 TA (°C) 6 ACS704ELC015-DS, Rev. 6 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ACS704ELC-015 Magnetic Offset versus Ambient Temperature VCC = 5 V; IP = 0 A, after excursion to 20 A 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -50 VOM (A) -25 0 25 50 TA