We are offering these breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their ACS72981xLR Hall effect-based, electrically isolated current sensors. The following list details some of the sensor’s key features:
- Hall effect-based sensor with electrically isolated current path allows the sensor to be inserted anywhere along the current path and to be used in applications that require electrical isolation.
- Differential Hall sensing rejects common-mode fields, so the orientation of the sensor relative to uniform external magnetic fields (e.g. the Earth’s magnetic field) has less effect on the measurement.
- The conductive path internal resistance is typically 0.2 mΩ, and the PCB is made with 6 layers of 2-oz copper, so very little power is lost in the module.
- High-bandwidth 250 kHz analog output voltage proportional to AC or DC currents.
- Less than 2 µs response time.
- Integrated digital temperature compensation circuitry allows improved accuracy over the full operating temperature range.
- Compact (0.7″×0.8″) carrier board offers a variety of ways to insert it into the current path along with 0.1″-pitch (breadboard-compatible) power, ground, and output pins.
- 3.3V and 5V versions available.
- Unidirectional and bidirectional versions available.
These sensors are the compact versions, which feature smaller 0.7″×0.8″ boards for integration into more space-constrained applications or for evaluation of the IC’s performance with a smaller PCB area for thermal dissipation. Larger versions are also available with space for larger connectors and thicker wires for the high-current path.
The following table lists the available ACS72981 carrier options:
Alternatives available with variations in these parameter(s):
typical operating voltage current range
Select variant…
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Products in category “ACS72981 Current Sensor Compact Carriers”
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-050B3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 050B3 |
±50 A (bidirectional) |
3.0 V to 3.6 V |
26.4 mV/A |
1.65 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-050B5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 050B5 |
±50 A (bidirectional) |
4.5 V to 5.5 V |
40 mV/A |
2.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-050U3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 050U3 |
0-50 A (unidirectional) |
3.0 V to 3.6 V |
52.8 mV/A |
0.33 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-100B3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 100B3 |
±100 A (bidirectional) |
3.0 V to 3.6 V |
13.2 mV/A |
1.65 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-100B5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 100B5 |
±100 A (bidirectional) |
4.5 V to 5.5 V |
20 mV/A |
2.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-100U3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 100U3 |
0-100 A (unidirectional) |
3.0 V to 3.6 V |
26.4 mV/A |
0.33 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981LLRATR-100U5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 100U5 |
0-100 A (unidirectional) |
4.5 V to 5.5 V |
40 mV/A |
0.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981KLRATR-150B3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 150B3 |
±150 A (bidirectional) |
3.0 V to 3.6 V |
8.8 mV/A |
1.65 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981KLRATR-150B5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 150B5 |
±150 A (bidirectional) |
4.5 V to 5.5 V |
13.3 mV/A |
2.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981KLRATR-150U3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 150U3 |
0-150 A (unidirectional) |
3.0 V to 3.6 V |
17.6 mV/A |
0.33 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981KLRATR-150U5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 150U5 |
0-150 A (unidirectional) |
4.5 V to 5.5 V |
26.7 mV/A |
0.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981ELRATR-200B3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 200B3 |
±200 A (bidirectional) |
3.0 V to 3.6 V |
6.6 mV/A |
1.65 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981ELRATR-200B5 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 5 V |
Zero Point @ 5 V |
Size |
| 200B5 |
±200 A (bidirectional) |
4.5 V to 5.5 V |
10 mV/A |
2.5 V |
0.7″×0.8″ |
This is the compact version of a simple carrier for Allegro’s ACS72981ELRATR-200U3 Hall effect-based, electrically isolated current sensor, which offers a low-resistance (~0.2 mΩ) current path and a high 250 kHz bandwidth for fast response times.
| Part Suffix |
Range |
Supply Voltage |
Sensitivity @ 3.3 V |
Zero Point @ 3.3 V |
Size |
| 200U3 |
0-200 A (unidirectional) |
3.0 V to 3.6 V |
13.2 mV/A |
0.33 V |
0.7″×0.8″ |
