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ACS3704x Current Sensor Carriers
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ACS3704x Current Sensor Micro Carrier (top) and Compact Carrier (bottom) basic dimensions with US quarter for size reference. |
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We are offering these breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their ACS37041/ACS37042 Hall effect-based, electrically isolated current sensors; we therefore recommend careful reading of the ACS37041/2 datasheet before using this product. 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 galvanic isolation.
- Low primary current path resistance of 1.6 mΩ in the sensor IC, so very little power is lost in the module.
- 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.
- High-bandwidth 150 kHz analog output voltage proportional to AC or DC currents.
- Less than 5 µs response time.
- Output is not ratiometric (i.e. the zero point and sensitivity are independent of the actual supply voltage), which provides immunity from noisy supplies.
- Integrated temperature compensation circuitry allows improved accuracy over the full operating temperature range.
- Automotive-grade operating temperature range of -40°C to 125°C.
- Carrier boards, available in micro (0.3″×0.4″) and our standard compact (0.7″×0.8″) sizes, offer 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.
- ACS37042 ICs have a higher isolation rating than the ACS37041 ICs and are on PCBs with routed slots for higher creepage.
The following table lists the available ACS37041 and ACS37042 carrier options:
| Pololu Item # |
Part Suffix | Isolation Rating 1 |
Supply Voltage | Current Range |
Sensitivity (mV/A) |
Zero Point | Size | PCB Details |
Min PCB Creepage 2 |
Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Micro Carriers | |||||||||||
 ACS37041 |
#5440 | 010B3 | 100 VRMS | 3.0 V to 3.6 V | ±10 A | 132 | 1.65 V | 0.3″×0.4″ 7.6×10.2 mm |
2 layers, 1-oz copper |
1.6 mm | $4.15 |
| #5441 | 030B3 | ±30 A | 44 | ||||||||
| #5442 | 010B5 | 4.5 V to 5.5 V | ±10 A | 200 | 2.5 V | ||||||
| #5443 | 030B5 | ±30 A | 66.7 | ||||||||
 ACS37042 |
#5450 | 010B3 | 285 VRMS | 3.0 V to 3.6 V | ±10 A | 132 | 1.65 V | 2.0 mm | $4.69 | ||
| #5451 | 030B3 | ±30 A | 44 | ||||||||
| #5452 | 010B5 | 4.5 V to 5.5 V | ±10 A | 200 | 2.5 V | ||||||
| #5453 | 030B5 | ±30 A | 66.7 | ||||||||
| Compact Carriers | |||||||||||
 ACS37041 |
#5444 | 010B3 | 100 VRMS | 3.0 V to 3.6 V | ±10 A | 132 | 1.65 V | 0.7″×0.8″ 17.8×20.3 mm |
2 layers, 2-oz copper |
1.6 mm | $4.45 |
| #5445 | 030B3 | ±30 A | 44 | ||||||||
| #5446 | 010B5 | 4.5 V to 5.5 V | ±10 A | 200 | 2.5 V | ||||||
| #5447 | 030B5 | ±30 A | 66.7 | ||||||||
 ACS37042 |
#5454 | 010B3 | 285 VRMS | 3.0 V to 3.6 V | ±10 A | 132 | 1.65 V | 3.0 mm | $4.99 | ||
| #5455 | 030B3 | ±30 A | 44 | ||||||||
| #5456 | 010B5 | 4.5 V to 5.5 V | ±10 A | 200 | 2.5 V | ||||||
| #5457 | 030B5 | ±30 A | 66.7 | ||||||||
| Note 1: IC component rating per manufacturer datasheet. | |||||||||||
| Note 2: Minimum creepage along PCB surface based on layout design only. Other creepage distances, e.g. along the body of the component, may be lower. | |||||||||||
Alternatives available with variations in these parameter(s): base IC current range size Select variant…
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These simple micro carriers of Allegro’s ACS37041 current sensors have dimensions of 0.3″×0.4″, making them well suited for space-constrained applications.
These simple micro carriers of Allegro’s ACS37042 current sensors have dimensions of 0.3″×0.4″, making them well suited for space-constrained applications.
These simple carriers of Allegro’s ACS37041 current sensors have our standard 0.7″×0.8″ compact form factor, making it easy to use them in applications designed for our assortment of other current sensors with this form factor. They have 2-oz copper for improved thermal dissipation.
These simple carriers of Allegro’s ACS37042 current sensors have our standard 0.7″×0.8″ compact form factor, making it easy to use them in applications designed for our assortment of other current sensors with this form factor. They have 2-oz copper for improved thermal dissipation.
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