Datasheet ACS711 (Allegro) - 4

Hall-Effect Linear Current Sensor with ACS711 Overcurrent Fault Output for < 100 V Isolation Applications COMMON OPERATING CHARACTERISTICS:
Valid across the full range of TA for the LC package and at TA = 25°C for the EX package, VCC = 3.3 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Units ELECTRICAL CHARACTERISTICS
Supply Voltage [1] VCC 3 3.3 5.5 V Supply Current ICC VCC = 3.3 V, output open – 4 5.5 mA Output Capacitance Load CLOAD VIOUT to GND – – 1 nF Output Resistive Load RLOAD VIOUT to GND 15 – – kΩ EX package – 0.6 – mΩ Primary Conductor Resistance RIP LC package, TA = 25°C – 1.2 – mΩ VIOUT Rise Time tr IP = IPMAX, TA = 25°C, COUT = open – 3.5 – μs Propagation Delay Time tPROP IP = IP(max), TA = 25°C, COUT = open – 1.2 – µs Response Time tRESPONSE IP = IP(max), TA = 25°C, COUT = open – 4.6 – µs Internal Bandwidth [2] BWI –3 dB, TA = 25°C – 100 – kHz Nonlinearity ELIN Over full range of IP – ±1 – % Symmetry ESYM Apply full scale IP – 100 – % V VIOUT Saturation Voltages IOH VCC – 0.3 – – V VIOL – – 0.3 V Quiescent Output Voltage VIOUT(Q) IP = 0 A, TA = 25°C – VCC / 2 – V Power-On Time t Output reaches 90% of steady-state level, TA = 25°C, PO 20 A present on primary conductor – 35 – μs
¯F ¯A ¯U ¯L¯ ¯T PIN CHARACTERISTICS
¯F ¯A ¯U ¯L ¯T Operating Point IFAULT – ±1 × IP – A ¯F ¯A ¯U ¯L ¯T Output Pullup Resistor RPU 1 – – kΩ V ¯F ¯A ¯U ¯L ¯T Output Voltage OH – VCC – 0.3 – V VOL RPU = 1 kΩ – 0.3 – V ¯F ¯A ¯U ¯L ¯T Response Time tFAULT Measured from | IP | > | IFAULT | to VFAULT ≤ VOL – 1.3 – µs VCC Off Voltage Level for Fault Reset [3] VCCFR – – 200 mV VCC Off Duration for Fault Reset [3] tCCFR 100 – – µs [1] Devices are programmed for maximum accuracy at 3.3 V VCC levels. The device contains ratiometry circuits that accurately alter the 0 A Output Voltage and Sensitivity level of the device in proportion to the applied VCC level. However, as a result of minor nonlinearities in the ratiometry circuit additional output error will result when VCC varies from the 3.3 V VCC level. Customers that plan to operate the device from a 5 V regulated supply should contact their local Allegro sales representative regarding expected device accuracy levels under these bias conditions. [2] Calculated using the formula BWI = 0.35 / tr. [3] After the ¯F ¯A ¯U ¯L ¯T pin is latched low, the only way to reset it is through a power-off and power-on cycle on the VCC pin. For fault reset, VCC must stay below VCCFR for a period greater than tCCFR before settling to the normal operation voltage (3 to 5.5 V). Allegro MicroSystems, LLC 4 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com