ACS70331: High Sensitivity, 1 MHz, GMR-Based Current Sensor IC in Space-Saving Low Resistance QFN and SOIC packages

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 and SOIC packages.

Top Features

  • 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

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ACS70331EESATR-005B3 12-lead QFN -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS70331EESATR-005U3 12-lead QFN -40°C to 85°C Yes View Data Contact your
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ACS70331EESATR-2P5B3 12-lead QFN -40°C to 85°C Yes View Data Contact your
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ACS70331EESATR-2P5U3 12-lead QFN -40°C to 85°C Yes View Data Contact your
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ACS70331EOLCTR-005B3 8-lead SOIC -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS70331EOLCTR-005U3 8-lead SOIC -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS70331EOLCTR-2P5B3 8-lead SOIC -40°C to 85°C Yes View Data Contact your
local sales rep
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ACS70331EOLCTR-2P5U3 8-lead SOIC -40°C to 85°C Yes View Data Contact your
local sales rep
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ASEK-70331EESA-005B3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
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Distributor Stock
ASEK-70331EESA-005U3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
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Distributor Stock
ASEK-70331EESA-2P5B3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
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Distributor Stock
ASEK-70331EESA-2P5U3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
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Distributor Stock
ASEK70331EOLC-005B3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
Check
Distributor Stock
ASEK70331EOLC-005U3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
Check
Distributor Stock
ASEK70331EOLC-2P5B3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
Check
Distributor Stock
ASEK70331EOLC-2P5U3 DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
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Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Allegro MicroSystems, LLC provides Gerber files for reference only. Any material, information, or instructions are provided AS IS without warranty of any kind. It is the responsibility of the User(s) to optimize any Printed Circuit Board (PCB) layout, as well as the selection of any components, for the specific application of the User(s).