USB Current Sensor

SKU: SPX-18016 Brand: Sparkfun

Retired Product

Replaced by: ADA2690

This product has been replaced by: ADA2690
This product is no longer available. This page is only for reference.

Do you want to be able to measure what current your board is drawing in real time? Maybe it is a board that draws short bursts of current? Or maybe you want to investigate what in-rush current your board draws? If so, this is the product for you!

The TI INA290 is an ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range. The INA290A1 on our board has a gain of 20 Volts per Volt and we measure the current using a 0.05 Ohm shunt resistor. Together these produce an output of 1 Volt per Amp. If your board is drawing 100mA, you will see an output of 100mV. The maximum current it can measure is 2 Amps and we've included a 2A resettable fuse for added protection.

We've provided both 0.1" breakout pads and Gator pads, to make it easy to connect up your multimeter or oscilloscope. Feed power in via the USB-C socket, and provide power to your board via the USB-A socket. A pair of USB 2.0 A to C Cables will allow you to connect the input to your USB port or power supply and the output to your board. You might find our BNC to Alligator Cable useful for connecting to your oscilloscope. Our Banana to Alligator Coax Cable is perfect for connecting your multimeter.

We do not plan to regularly produce SparkX products so get them while they’re hot!

Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our forum for support or to ask a question.

Features

INA290A1 Ultra-Precise Current Sense Amplifier
- Operating supply range (V_S): 2.7 V to 20 V
- Common-mode input range: V_S to +120 V
- Gain: 20V/V
- Gain error: ±0.1% (maximum)
- Offset voltage: ±12 μV (maximum)
- High bandwidth: 1.1 MHz
- Slew rate: 2 V/μs
- Quiescent current: 370 μA
- Operating temperature range: -40 °C to +125 °C
0.05 Ohm Sense Resistor
- 0.2W maximum
Current sensing range: 2A maximum
Voltage drop at 2A: 0.1V

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We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

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$12+ for Pack and Track (3+ days, tracked)
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Our physical address (here's a PDF which includes other key business details):

40 Aruma Place
Cardiff
NSW, 2285
Australia

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