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ACS72981 Current Sensor Large Carriers
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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.
- Large (1.4″×1.2″) carrier board offers a variety of ways to insert it into the current path and 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 large versions, which feature larger 1.4″×1.2″ boards with space for larger connectors and thicker wires for the high-current path. Smaller versions are also available for more space-constrained applications or to evaluate the IC’s performance with a smaller PCB area for thermal dissipation.
The following table lists the available ACS72981 carrier options:
| Pololu Item # |
Part Suffix | Supply Voltage (V) |
Current Range | Sensitivity @ Nominal Vcc (mV/A) |
Zero Point @ Nominal Vcc (V) |
Size | Price | ||
|---|---|---|---|---|---|---|---|---|---|
 Large Carrier |
#5270 | 050B3 | 3.0 to 3.6 (3.3 nominal) |
Bidirectional | ±50 A | 26.4 | 1.65 | 1.4″×1.2″ | $12.95 |
| #5273 | 100B3 | ±100 A | 13.2 | ||||||
| #5277 | 150B3 | ±150 A | 8.8 | ||||||
| #5272 | 050U3 | Unidirectional | 0-50 A | 52.8 | 0.33 | ||||
| #5275 | 100U3 | 0-100 A | 26.4 | ||||||
| #5279 | 150U3 | 0-150 A | 17.6 | ||||||
| #5271 | 050B5 | 4.5 to 5.5 (5 nominal) |
Bidirectional | ±50 A | 40 | 2.5 | |||
| #5274 | 100B5 | ±100 A | 20 | ||||||
| #5278 | 150B5 | ±150 A | 13.3 | ||||||
| #5276 | 100U5 | Unidirectional | 0-100 A | 40 | 0.5 | ||||
Compare all products in this category
Products in category “ACS72981 Current Sensor Large Carriers”
| Pololu item #: 5270 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5271 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5272 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5273 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5274 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5275 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5276 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5277 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5278 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the large 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 | 1.4″×1.2″ |
| Pololu item #: 5279 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This is the large 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 | 1.4″×1.2″ |
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