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High-Accuracy, Galvanically Isolated Current Sensor IC with Pin-Selectable Bandwidth

ACS722

ACS722KMA Product Image

The ACS722 provides precise current measurements for AC or DC current, featuring pin-selectable bandwidth (80kHz or 20kHz), galvanic isolation, and a small footprint for space-constrained applications. Operates at 5V.

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  • Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor
  • UL60950-1 (ed. 2) certified
    • Dielectric Strength Voltage
      • ACS722LLC: 2.4 kVrms
      • ACS722KMA: 4.8 kVrms
    • Basic Isolation Working Voltage
      • ACS722LLC: 420 Vpk or VDC / 297 Vrms
      • ACS722KMA: 1550 Vpk / 1097 Vrms or VDC
    • Reinforced Isolation Working Voltage
      • ACS722KMA: 800 Vpk / 565 Vrms or VDC
  • Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques
  • Pin-selectable band width: 80 kHz for high bandwidth applications or 20 kHz for low noise performance.
  • Primary conductor resistance for low power loss and high inrush current withstand capability
    • ACS722LLC: 0.65 mΩ
    • ACS722KMA: 0.85 mΩ
  • Packages:
    • ACS722LLC: Small footprint, low-profile SOIC8 package suitable for space-constrained applications
    • ACS722KMA: Low-profile SOIC16 wide-body package suitable for space-constrained, high isolation applications
  • ACS722LLC: Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients
  • 3 to 3.6 V, single supply operation
  • Output voltage proportional to AC or DC current
  • Factory-trimmed sensitivity and quiescent output voltage for improved accuracy
  • Chopper stabilization results in extremely stable quiescent output voltage
  • Nearly zero magnetic hysteresis
  • Ratiometric output from supply voltage

The ACS722 is provided in a small, low profile surface mount SOIC8 package or the higher isolation surface mount SOIC16W wide body package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS.

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Application Note
Package Thermal Resistance for Allegro Current Sensors with Integrated Conductors
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Certificate CB US 42876 UL LC Package
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CB Certificate US-32848-UL
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Certificate of Compliance 20190906-E316429
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CB Certificate US-32210-M3-UL
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Certificate CB US 36315 UL MA Package
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Certificate of Compliance 20181207-E316429
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Current Sensors FAQ
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Documents Found: 32
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Gerber File
ASEK722LC Gerber Files
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ASEK722MA Gerber Files
Simulation Tool
Current Sensor Error and Resolution
SPICE Model
ACS LTspice Library
Webpage
Current Sensor Evaluation Boards Page