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ACS70331

Allegro
Part Number ACS70331
Manufacturer Allegro
Description GMR-Based Current Sensor
Published May 25, 2019
Detailed Description ACS70331 High Sensitivity, 1 MHz, GMR-Based Current Sensor IC in Space-Saving, Low Resistance QFN and SOIC-8 Packages F...
Datasheet PDF File ACS70331 PDF File

ACS70331
ACS70331

Overview
ACS70331 High Sensitivity, 1 MHz, GMR-Based Current Sensor IC in Space-Saving, Low Resistance QFN and SOIC-8 Packages FEATURES AND BENEFITS • 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 PACKAGES 12-contact QFN 3 mm × 3 mm × 0.
75 mm (ES package) Not to scale 8-contact SOIC (OL package) DESCRIPTION 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.
The differential configuration of the GMR elements, relative to 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.
TYPICAL APPLICATION CBYPASS 0.
1 µF 1 IP+ 12 11 VCC NC VIOUT 10 2 IP+ NC 9 ACS70331 IP 3 IP– 8 NC 4 IP– GND ...


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