ACS70331EESATR-2P5U3

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1. Describe

The ACS70331EESATR-2P5U3 is Allegro's first integrated high-sensitivity current sensor IC for <5 A current sensing applications. It uses Giant Magnetoresistive (GMR) technology, which is 25 times more sensitive than conventional Hall-effect sensors, and senses the magnetic field generated by current flowing through a low-resistance integrated primary conductor. The analog output provides a low-noise, high-speed signal that is proportional to the current flowing through the primary. The response time of the device is typically 535 ns. The ACS70331 offers four factory-programmed sensitivity and offset levels to optimize performance over the desired current measurement range. The differential configuration of the GMR element, relative to the integrated current conductor, significantly suppresses stray magnetic fields, enabling stable operation. The ACS70331 operates from a single 3.3 V supply and is qualified over the full commercial temperature range of –40°C to 85°C. It is available in low profile, space saving surface mount QFN-12 and SOIC-8 packages.

2. Feature

    1. High sensitivity current sensor ICs capable of sensing currents up to 5 A (DC or AC)

    2. 1 MHz bandwidth, response time <550 ns

    3. Low noise: 8 mA(rms) at 1 MHz

    4. Non-proportional analog output proportional to AC and DC current

    5. Single 3.3 V supply operation

    6. High DC PSRR allows use of low precision power supplies or batteries (3 to 4.5 V operation)

    7. 1.1 mΩ primary conductor resistance results in low power loss

    8. Small surface mount QFN-12 and SOIC-8 packages for space constrained applications

3. Pin configuration

4. Pin Description