ACS758 50A ACS758LCB-050B Current Sensor

The ACS758 consists of a precision, low-offset linear Hall sensor circuit with a copper current path close to the product. The current applied through the copper current path is capable of generating a magnetic field that can be induced by the integrated Hall IC and converted to a proportional voltage.

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SKU PRD-00001177
Categories: Sensors
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Product Details

The terminals of the conduction path and the sensor pins (pins 1 to 3) are electrically blasted. In this way, the ACS758 sensor 1C series can be used in applications that require electrical insulation but use opto-insulators or complex insulation techniques.
The ACS758 device is fully calibrated prior to shipment from the factory. The ACS758 series is a lead-free product. All pins are plated with fog and no lead is present in the package.


Technical Specifications:

  • Voltage Supply (VDD): 3V0 ~ 5V5
  • Abs.Max VDD: -0.5V ~ 8V0
  • Measurement range: ±50A
  • Interface: Analogue
  • Active current (mA) (typ,max): 10, 13.5
  • Conductor resistance 100µ Ohm
  • Zero current output voltage: VCC/2
  • Output offset (@25°C, High T, Low T)[3]mV: ±5, ±15, ±35
  • Sensitivity: 40mV/A
  • Noise: 10mV
  • Magnetic offset error [1]: 100mA
  • Propagation delay (Current change to op): 1µs
  • Rise time (step response 10% to 90%): 3µs
  • Error (High Temp, low Temp)[3]: -1.2%, 2%
  • Accuracy best at [2][2a]: 5V supply
  • Output load resistance: 4k7
  • Output load capacitance (max): 10nF
  • Overcurrent for 1s (@25°C,150°C): 1200A, 600A
  • Isolation Voltage (VDC or VPK, VRMS): 900V, 700Vrms
  • Package Thermal resistance: 7°C/W
  • Max junction Temp.: 165°C
  • Operating temperature: -40°C ~ 150°C

[1] Occurs when device is subjected to high or over current.
[2] For 3V3 contact AllegroMicroSystems for accuracy data.
[2a] The device is Ratiometric.
[3] High temp = 25°C ~ 150°C, Low temp = -40°C ~ 25°C.


Top Features

  • Industry-leading noise performance through proprietary amplifier and filter design techniques
  • Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high-voltage applications
  • Total output error improvement through gain and offset trim over temperature
  • Small package size, with easy mounting capability
  • Monolithic Hall IC for high reliability
  • Ultralow power loss: 100 µΩ internal conductor resistance
  • Galvanic isolation allows use in economical, high-side current sensing in high-voltage systems
  • 3.0 to 5.5 V, single supply operation
  • 120 kHz typical bandwidth
  • 3 µs output rise time in response to step input current
    Output voltage proportional to AC or DC currents
  • Factory-trimmed for accuracy
  • Stable output offset voltage
  • Nearly zero magnetic hysteresis
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