ACS37030 Current Sensor Carriers

ACS37030 Current Sensor Carrier family size comparison.

We are offering these breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their ACS37030 DC to 5 MHz bandwidth, galvanically isolated, high-accuracy current sensors with reference output. The following list details some of the sensor’s key features:

• 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.
• High bandwidth (DC to 5 MHz) analog voltage output proportional to the current.
• 40 ns typical response time.
• Two current signal paths:
  • Hall effect-based sensor for capturing DC and low-frequency current information
  • Inductive coil for capturing high-frequency current information.
• 0.7 mΩ (LZ package) or 0.9 mΩ (MY package) primary current path resistance in the sensor IC, and the PCB is made with 2-layer (compact versions) or 6-layer (large versions) 2-oz copper, 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.
• Output is not ratiometric (i.e. the zero point and sensitivity are independent of the actual supply voltage), which provides immunity from noisy supplies.
• VREF output for pseudo-differential signaling in noisy application environments.
• Integrated digital temperature compensation circuitry allows improved accuracy over the full operating temperature range.
• Automotive-grade operating temperature range of -40°C to 150°C.
• Carrier boards, available in compact and large 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.
• ACS37030MY ICs have a higher isolation rating and creepage/clearance distance than the ACS37030LZ ICs and are on PCBs with routed slots for maximum benefit from that higher creepage.
• ACS37030MY carriers have optional connection points for convenient 4-wire measurement of the IC current path resistance.

The following table lists the available ACS37030 carrier options:

	Pololu Item #	Part Suffix	Isolation Rating 1	Current Range	Sensitivity (mV/A)	Size	PCB Details	Min PCB Creepage 2	Price
ACS37030LZ Compact Carrier	#5230	020B3	840 VRMS	±20 A	66	0.7″×0.8″	2 layers, 2-oz copper	4.1 mm	$11.95
	#5231	040B3		±40 A	33
	#5232	065B3		±65 A	20.3
ACS37030LZ Large Carrier	#5234	040B3	840 VRMS	±40 A	33	1.4″×1.2″	6 layers, 2-oz copper	4.1 mm	$14.95
	#5235	065B3		±65 A	20.3
ACS37030MY Compact Carrier	#5694	025B3	1000 VRMS	±25 A	52.8	0.8″×1.1″	2 layers, 2-oz copper	11.7 mm	$12.95
	#5695	040B3		±40 A	33
	#5696	065B3		±65 A	20.3
ACS37030MY Large Carrier	#5698	040B3	1000 VRMS	±40 A	33	1.4″×1.2″	6 layers, 2-oz copper	11.9 mm	$17.95
	#5699	065B3		±65 A	20.3
Note 1: IC component rating for basic isolation per manufacturer datasheet. The overall carrier is not certified to any particular safety standard.
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): current range size package Select variant…

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