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Product description: Current sensor ACS37041KLHBLT-010B3 -10 A to +10 A - Pololu 5440
The Pololu 5440 module is equipped with the Allegro ACS37041KLHBLT-010B3 Hall Effect sensor. The low current path resistance of approximately 1.6 mΩ reduces power loss during measurement, while differential magnetic field measurement reduces the influence of external, uniform magnetic fields on the result. The analog output voltage varies proportionally to the direction and magnitude of the measured current, allowing the sensor to easily interface with a microcontroller's ADC input.
Current sensor ACS37041KLHBLT-010B3 -10 A to +10 A - Pololu 5440.
The sensor offers bidirectional current measurement in the range from -10 A to 10 A.
Main features of the ACS37041 sensor
- Measurement range : bidirectional current measurement from -10 A to +10 A
- Measurement technology : Hall effect measurement with electrically isolated current path
- Sensitivity : 132 mV/A
- Zero point : the output voltage is approximately 1.65 V at 0 A current
- Supply voltage : operating in the range from 3 V to 3.6 V, nominal 3.3 V
- Analog output : the VOUT voltage changes linearly with the value and direction of the current flow.
- Non-ratiometric output : zero point and sensitivity are slightly affected by supply voltage variations within the permissible range
- Low resistance of the current path : about 1.6 mΩ, which reduces energy losses and heating
- Fast response : Typical response time around 3 µs, maximum 5 µs
- Wide operating temperature range : from -40°C to 125°C
- Compact board : dimensions of only 7.6 x 10.2 mm
- Breadboard compatibility : VDD, GND and VOUT pins are adapted to 2.54 mm pitch connectors
Pinout and connection of the ACS37041 current sensor
For proper operation, the module requires five connections: IP+, IP-, VDD, GND, and VOUT . A 3 V to 3.6 V power supply should be applied between VDD and GND, and VOUT should be connected to the analog input of a microcontroller or other measuring system. The measured current flows through the IP+ and IP- terminals, and the direction marked on the board as positive causes the output voltage to increase above 1.65 V; flow in the opposite direction causes it to drop. For a current of 0 A, the VOUT voltage is approximately 1.65 V , and each 1 A current change causes a voltage change of approximately 132 mV . The relationship can be written as: VOUT = 1.65 V + 0.132 V/A x IP , while the current value can be determined from the formula: IP = (VOUT - 1.65 V) / 0.132 V/A . The VDD, GND and VOUT points work with standard 2.54 mm pitch goldpins, while the high current path can be connected via directly soldered wires, terminal blocks with a pitch of 3.5 mm or 5 mm or appropriately spaced goldpin connectors.
Current sensor pins.
The analog output allows the sensor to be easily used in projects with microcontrollers, automation systems, robotics and measurement devices.
Technical specifications of the ACS37041KLHBLT-010B3 sensor
- Measuring system: Allegro ACS37041KLHBLT-010B3
- Base chip: ACS37041
- Measurement technology: Hall effect
- Measurement type: bidirectional
- Current measurement range: -10 A to 10 A
- Type of measured current: AC and DC
- Nominal supply voltage: 3.3 V
- Supply voltage range: 3.0 V to 3.6 V
- Typical current consumption: 8 mA
- Sensitivity: 132 mV/A
- Output voltage at 0 A: 1.65 V
- Output type: analog, non-ratiometric
- Typical analog signal bandwidth: 125 kHz
- Typical response time: 3 µs
- Maximum response time: 5 µs
- Resistance of the current path of the system: about 1.6 mΩ
- Functional isolation of the ACS37041: 100 V RMS
- Minimum creepage distance on PCB: 1.6 mm
- Operating temperature range: -40°C to 125°C
- VDD, GND and VOUT pinout pitch: 2.54 mm
- PCB: 2-layer, 1 oz copper
- Dimensions: 7.6 x 10.2 mm
- Weight: 0.2 g
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