ACS37200 Current Sensor Carriers

Basic board dimensions of the ACS37200 Current Sensor Compact Carrier.

We are offering these breakout boards with support from Allegro Microsystems as an easy way to use or evaluate their ACS37200 Hall effect-based, electrically isolated current sensors with user-configurable overcurrent fault output. 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.
• Extra-low primary current path resistance of 0.05 mΩ in the sensor IC for higher efficiency.
• 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.
• 150 kHz bandwidth analog output voltage proportional to AC or DC currents.
• Less than 4 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.
• User-configurable overcurrent fault output with 3 µs response time indicates when the current magnitude exceeds the set threshold and can be used for fast short-circuit detection.
• 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 board includes routed slots for increased creepage along the PCB surface and offers a variety of ways to insert it into the current path along with 0.1″-pitch (breadboard-compatible) power, ground, and output pins.
• Optional connection points for convenient 4-wire measurement of the IC current path resistance.

The following table lists the available ACS37200 carrier options:

	Supply Voltage (V)	Current Range	Sensitivity (mV/A)	Part Suffix	Pololu Item #	Size	PCB Details	Isolation Rating (1)	Min PCB Creepage (2)	Price
Compact Carrier	3.15 to 3.45 (3.3 nominal)	±100 A	13.2	100B3	#5780 (coming soon)	0.8″×1.1″	2 layers, 2-oz copper	1097 VRMS	10.1 mm	$19.95
		±150 A	8.8	150B3	#5781 (coming soon)
		±200 A	6.6	200B3	#5782
	4.5 to 5.5 (5 nominal)	±100 A	20	100B5	#5783
		±150 A	13.3	150B5	#5784 (coming soon)
		±200 A	10	200B5	#5785 (coming soon)
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): current range Select variant…

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