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

ACS722

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.

Evaluation Board

Product Details

Top Features

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