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ACS70331 Datasheet(PDF) 1 Page - Allegro MicroSystems |
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ACS70331 Datasheet(HTML) 1 Page - Allegro MicroSystems |
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1 / 26 page  Not to scale The ACS70331 is Allegro’s first integrated, high sensitivity, current sensor IC for <5 A current sensing applications. It incorporates giant magneto-resistive (GMR) technology that is 25 times more sensitive than traditional Hall-effect sensors to sense the magnetic field generated by the current flowing through the low resistance, integrated primary conductor. The analog output provides a low noise high-speed signal, which is proportional to the current flowing through the primary. The response time of the part is typically 535 ns. The ACS70331 is offered in four factory-programmed sensitivity and offset levels to optimize performance over the desired current measurement range. ThedifferentialconfigurationoftheGMRelements,relativeto the integrated current conductor, provides significant rejection of stray magnetic fields, resulting in stable operation even in magnetically noisy environments. The ACS70331 operates from a single 3.3 V power supply and is qualified over the full commercial temperature range of –40°C to 85°C. It is offered in a low-profile, space-saving surface mount QFN-12 and SOIC-8 packages. ACS70331-DS, Rev. 2 MCO-0000343 • High sensitivity current sensor IC for sensing up to 5 A (DC or AC) • 1 MHz bandwidth with response time <550 ns • Low noise: 8 mA(rms) at 1 MHz • Non-ratiometric, analog output proportional to AC and DC current • Single 3.3 V supply operation • High DC PSRR enables use with low accuracy power supplies or batteries (3 to 4.5 V operation) • 1.1 mΩ primary conductor resistance results in low power loss • Small surface mount QFN-12 and SOIC-8 packages for space-constrained applications High Sensitivity, 1 MHz, GMR-Based Current Sensor IC in Space-Saving, Low Resistance QFN and SOIC-8 Packages TYPICAL APPLICATION C BYPASS 0.1 µF ACS70331 CLOAD 1 2 3 4 10 9 8 5 IP+ IP+ IP– IP– VCC VIOUT GND 12 6 7 11 NC NC NC NC NC IP ACS70331 VCC VIOUT NC GND IP- IP- IP+ IP+ 1 2 3 4 8 7 6 5 CBYPASS 0.1 µF IP SOIC-8 QFN-12 The output, VIOUT, of the ACS70331 responds proportionally to the current flowing through IP. FEATURES AND BENEFITS DESCRIPTION PACKAGES 12-contact QFN 3 mm × 3 mm × 0.75 mm (ES package) ACS70331 May 23, 2018 8-contact SOIC (OL package) |
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