Product Summary

The AEC-Q100 qualified ACS71240 series of monolithic Hall effect current sensors offers improvements over the popular Allegro ACS711 series of current sensors. These improvements include output signal immunity to stray magnetic fields (generated by adjacent motors or current carrying wires), improved output signal accuracy (typically less than ± 1.5%), and output signal immunity to noisy power supply voltage rails. The device also features a dedicated fast overcurrent fault output with a typical response time of 1.5 us. This fast fault output can easily detect short circuit events to prevent damage to MOSFETs or IGBTs in inverters, motors or other switching power electronics applications.

The ACS71240 is available in two very small package options, each offering different levels of galvanic isolation. The tiny 3mm x 3mm wettable flank QFN package can be used with voltage rails up to 120VDC, allowing for 0PPM solder joint inspection required in automotive applications. The standard footprint SOIC8 package is UL recognized for 2400VRMS of isolation and offers a working voltage of 420VDC or 297VRMS.

The ACS71240 series is designed to replace shunt resistors, operational amplifiers, current transformers and voltage isolators in applications requiring a small form factor monolithic sensor solution. The reduction in discrete components saves board space and lowers the overall cost of current sensing. The sensor can be used with either a 5V or 3.3V power supply.

Product features

・ AEC-Q100 Accreditation
・Differential Hall sensing eliminates common-mode stray magnetic fields
・Full scale current 50% to 200% Factory programmable trip range of overcurrent FAULT
- Non-ratiometric output tolerant to noisy power supplies
Galvanic isolation:
　　- QFN package: 120VDC Operating voltage
- SOIC8 package: UL Accreditation 2400VRMS, 420VDC or 297VRMS Operating voltage
・Reduced power loss:
- QFN package 0.6 mΩ Inner Conductor Resistance
- SOIC8 package 1.2 mΩ Inner Conductor Resistance
Integrated shielding virtually eliminates capacitive coupling from current conductors to the die, providing high dv/dt Greatly suppresses output noise caused by transient phenomena
・ AC or DC Output voltage proportional to current
High bandwidth 120kHz Analog output improves response time in control applications
Factory-calibrated sensitivity and quiescent output voltage for improved accuracy
・ 3.3V and 5V Single power supply operation
・Space-saving, slim design QFN and SOIC8 Packaged for space-constrained applications

Target application

• Solar power generation, power conditioner
• industrial motor control
• white goods
• FA equipment
• electric bike
• Infotainment

Click here for the manufacturer's site

• ACS712400 Product Page
• ACS712400 Datasheet

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