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ACS70331EOLCTR-005U3

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Allegro MicroSystems, LLC Current Sensors, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ACS70331EOLCTR-005U3

Allegro MicroSystems, LLC · Current Sensors · SOIC-8

ACS70331EOLCTR-005U3 from Allegro MicroSystems, LLC, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IP+ passive Terminal for the current being sensed; fused internally, and one of two IP+ pins that should be connected together.
2 IP+ passive Terminal for the current being sensed; fused internally, and one of two IP+ pins that should be connected together.
3 IP- passive Terminal for the current being sensed; fused internally, and one of two IP- pins that should be connected together.
4 IP- passive Terminal for the current being sensed; fused internally, and one of two IP- pins that should be connected together.
5 GND power_in Device ground terminal.
6 NC unconnected This pin should be left unconnected during normal operation.
7 VIOUT output Analog output representing the current flowing through IP, proportional to the primary current.
8 VCC power_in Device power supply terminal; the ACS70331 operates from a single 3.3 V supply, with 3 to 4.5 V operation stated for high DC PSRR.

Key specifications

Parameter Value
Manufacturer Allegro MicroSystems, LLC
Package SOIC-8
Category Sensors
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VCC 3 3.3 4.5 V 5
Supply Current ICC 4.5 6 mA VCC(min) ≤ VCC ≤ VCC(max), no load on VIOUT, fuses powered down 5
Supply Current, start-up (fuses powered) ICC_START_UP 7.5 mA VCC(min) ≤ VCC ≤ VCC(max), no load on VIOUT, fuses powered (from VCC(min) to tFPD) 5
Fuse Power Down Time tFPD 80 120 µs TA = 25°C 5
Output Resistive Load RL 22 kΩ VIOUT to GND or VIOUT to VCC 5
Output Capacitive Load CL 100 pF VIOUT to GND, output is stable, slew rate and bandwidth are reduced 5
Output Capacitive Load CL 50 pF VIOUT to GND, maintains BW 5
Saturation Voltage, high VSAT_HIGH 2.8 V VCC(min) < VCC < VCC(max); RL = 22 kΩ to GND 5
Saturation Voltage, low VSAT_LOW 20 200 mV VCC(min) < VCC < VCC(max); RL = 22 kΩ to VIOUT 5
Hysteresis IH 10 20 mA TA = 25°C; change in output at zero current after ±10 A pulse 5
Power Supply Offset Error VOE(PS) -10 10 mV Change in offset voltage over 3.0 V < VCC < 4.5 V 6
Power Supply Sensitivity Error ESENS(PS) -0.5 0.5 % Change in sensitivity over 3.0 V < VCC < 4.5 V 6
Nonlinearity ELIN -0.2 0.2 % 6
Current Sensing Range IPR 0 5 A 10
Total Output Error ETOT -2.2 2.2 % Measured at IP = IPR(max), TA = 25°C 10
Total Output Error ETOT -3.5 3.5 % Measured at IP = IPR(max), TA = 25°C to 85°C 10
Total Output Error ETOT -6.5 6.5 % Measured at IP = IPR(max), TA = -40°C to 25°C 10
Sensitivity Error Esens -1.5 1.5 % Measured at IP = IPR(max), TA = 25°C 10
Sensitivity Error Esens -3 3 % Measured at IP = IPR(max), TA = 25°C to 85°C 10
Sensitivity Error Esens -5 5 % Measured at IP = IPR(max), TA = -40°C to 25°C 10
Offset Voltage VOE -40 40 mV IP = 0 A, TA = 25°C 10
Offset Voltage VOE -45 45 mV IP = 0 A, TA = 25°C to 85°C 10
Offset Voltage VOE -100 100 mV IP = 0 A, TA = -40°C to 25°C 10
Supply Voltage (absolute maximum) VCC 7 V 2
Reverse Supply Voltage VRCC -0.1 V 2
Output Voltage VIOUT 6 V 2
Reverse Output Voltage VRIOUT -0.1 V 2
Working Voltage VWORKING 100 V Voltage between pins 1 to 4 and pins 5 to 8 (SOIC) 2
Maximum Continuous Current IP(max) -10 10 A 2
Maximum Continuous External Field B -50 50 G 2
Nominal Operating Ambient Temperature Range E TA -40 85 °C 2
Maximum Junction Temperature TJ(max) 100 °C 2
Storage Temperature Tstg -65 125 °C 2
Primary Conductor Resistance RIP 1.7 mΩ SOIC-8 package, TA = 25°C 5
Primary Conductor Inductance LIP 4 nH SOIC-8 package 5
Power On Time tPO 5 µs TA = 25°C 5
Source Current ISOURCE 0.4 mA TA = 25°C 5
Sink Current ISINK 0.5 mA TA = 25°C 5
Bandwidth BW 1 MHz -3 dB bandwidth 5
Response Time tRESPONSE 535 ns 1 V swing on VIOUT, 80% to 80% 5
Rise Time tr 460 ns 1 V swing on VIOUT, 10% to 90% 5
Propagation Delay tpd 220 ns 1 V swing on VIOUT, 20% to 20% 5
Noise Density IND 8 µARMS/√Hz Input referred noise density 5
Noise IN 8 mARMS Input referred noise; TA = 25°C, Bandwidth = 1 MHz 5
Hysteresis IH 20 mA TA = 25°C; change in output at zero current after ±100 A pulse (~20 ms) 5
Stray Field Sensitivity Error Ratio STERSENS 0.2 %/G Measured at 20 G, worst case field orientation 6
Stray Field Offset Error Ratio STEROFF 3.8 mA/G Measured at 20 G, worst case field orientation 6
Power Supply Rejection Ratio PSRR 40 dB DC to 100 Hz, 100 mV pk-pk on VCC 6
Power Supply Rejection Ratio PSRR 30 dB 100 Hz to 100 kHz, 100 mV pk-pk on VCC 6
Sensitivity Sens 400 mV/A IPR(min) < IP < IPR(max) 10
Zero Current Output Voltage VIOUT(Q) 0.25 V IP = 0 mA, TA = 25°C 10

CAD (KiCad official)

  • Symbol: ACS70331EOLCTR-005U3
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: acs70331eolctr-005u3-etched.step / acs70331eolctr-005u3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); acs70331eolctr-005u3.step / acs70331eolctr-005u3.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Allegro MicroSystems, LLC datasheet (26 pp, sha256 0e06b3d2c145717e, retrieved 2026-10-28, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF