{"product_id":"pololu-acs724-current-sensor-carrier-2-5a-to-2-5a","title":"Pololu ACS724 Current Sensor Carrier -2.5A to +2.5A","description":"\u003cp\u003eThis \u003ca title=\"Pololu\" href=\"\/zh\/collections\/pololu\"\u003ePololu\u003c\/a\u003e board is a simple carrier of Allegro’s \u003cstrong\u003ebidirectional ±2.5A\u003c\/strong\u003e ACS724LLCTR-\u003cstrong\u003e2P5AB\u003c\/strong\u003e Hall effect-based linear current sensor, which offers a low-resistance (~1.2 mΩ) current path and electrical isolation up to 2.4 kV RMS.\u003c\/p\u003e\n\u003cp\u003eThis version accepts a \u003cstrong\u003ebidirectional\u003c\/strong\u003e current input with a magnitude up to \u003cstrong\u003e2.5A\u003c\/strong\u003e and outputs a proportional analog voltage (\u003cstrong\u003e800 mV\/A\u003c\/strong\u003e) centered at \u003cstrong\u003e2.5V\u003c\/strong\u003e with a typical error of \u003cstrong\u003e±1.5%\u003c\/strong\u003e. It operates from \u003cstrong\u003e4.5V to 5.5V\u003c\/strong\u003e and is intended for use in 5V systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarning: This product is intended for use below 30V\u003c\/strong\u003e. Working with higher voltages can be extremely dangerous and should only be attempted by qualified individuals with appropriate equipment and protective gear.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThis current sensor is a carrier board or breakout board for Allegro’s ACS724LLCTR Hall effect-based linear current sensors; we therefore recommend careful reading of the \u003ca href=\"https:\/\/www.pololu.com\/file\/0J1664\/ACS724-Datasheet.pdf\"\u003eACS724 datasheet\u003c\/a\u003e before using this product.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/thepihut.com\/search?q=ACS724+Current+Sensor+Carrier\u0026amp;narrow_by=\u0026amp;sort_by=relevency\u0026amp;page=1\"\u003eA number of different versions of this carrier are available\u003c\/a\u003e, which all share the same key features.\u003c\/p\u003e\n\u003ch2\u003eShared Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDifferential 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) does not affect the measurement.\u003c\/li\u003e\n\u003cli\u003eThe conductive path internal resistance is typically 1.2 mΩ, and the PCB is made with 2-oz copper, so very little power is lost in the module.\u003c\/li\u003e\n\u003cli\u003eUse of a Hall effect sensor means the IC is able to electrically isolate the current path from the sensor’s electronics (up to 2.4 kV RMS), which allows the sensor to be inserted anywhere along the current path and to be used in applications that require electrical isolation.\u003c\/li\u003e\n\u003cli\u003eHigh 120 kHz bandwidth for faster response times in control applications.\u003c\/li\u003e\n\u003cli\u003eOptional FILTER pin simplifies bandwidth limiting for better noise reduction and improved resolution at lower frequencies.\u003c\/li\u003e\n\u003cli\u003eIntegrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor.\u003c\/li\u003e\n\u003cli\u003eAutomotive-grade operating temperature range of -40°C to 150°C.\u003c\/li\u003e\n\u003cli\u003ePads are labeled on the bottom silkscreen. The silkscreen also shows the direction that is interpreted as positive current flow via the +i arrow.\u003c\/li\u003e\n\u003cli\u003eA variety of options are available with different current sensing ranges (you can distinguish them by reading the text on the IC, we also provide a white box on the bottom silkscreen where you can add your own distinguishing markings if so desired).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDetails for item POL-4040\u003c\/h2\u003e\n\u003cp\u003eThis carrier features the ACS724LLCTR-\u003cstrong\u003e2P5AB\u003c\/strong\u003e, which operates at \u003cstrong\u003e5V\u003c\/strong\u003e and is designed for \u003cstrong\u003ebidirectional\u003c\/strong\u003e input current from \u003cstrong\u003e-2.5A to +2.5A\u003c\/strong\u003e. When Vcc is 5V, the output voltage is centered at 2.5V and changes by \u003cstrong\u003e800mV\u003c\/strong\u003e per amp of input current, with positive current increasing the output voltage and negative current decreasing the output voltage.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCurrent sense: \u003cstrong\u003e0.800 V\/A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum logic voltage: 4.5 V\u003c\/li\u003e\n\u003cli\u003eMaximum logic voltage: 5.5 V\u003c\/li\u003e\n\u003cli\u003eSupply current: 14 mA\u003c\/li\u003e\n\u003cli\u003eVersion: \u003cstrong\u003e-2.5A to +2.5A (bidirectional 2.5A)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCurrent sensor: Allegro ACS724LLCTR-\u003cstrong\u003e2P5AB\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSize: 0.7\" x 0.8\"\u003c\/li\u003e\n\u003cli\u003eWeight: 1.1 g\u003c\/li\u003e\n\u003cli\u003ePCB dev codes: \u003cstrong\u003ecs01a\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOther PCB markings: \u003cstrong\u003e0J1214\u003c\/strong\u003e, blank white box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eUsing the sensor\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/ACS724_-_diagram.jpg?v=1712670404\"\u003e\u003c\/p\u003e\n\u003cp\u003eThis sensor has five required connections: the input current (IP+ and IP-), logic power (VCC and GND), and the sensor output (OUT).\u003c\/p\u003e\n\u003cp\u003eThe sensor requires a supply voltage of 4.5 V to 5.5 V to be connected across the VCC and GND pads, which are labeled on the bottom silkscreen, and the sensor outputs an analog voltage that is linearly proportional to the input current.\u003c\/p\u003e\n\u003cp\u003eThe FILTER pin lets you adjust the board’s bandwidth by adding a capacitor to ground (a ground pad has been added next to the FILTER pin for convenience) in parallel with the 1 nF capacitor that is already on the board. Without an added external filter capacitor, the bandwidth is about 90 kHz. The datasheet provides more information on how the filter capacitors affect bandwidth.\u003c\/p\u003e\n\u003cp\u003eYou can insert the board into your current path in a variety of ways. For low-current applications, you can solder 0.1″ male header pins to the board via the smallest pair of through-holes on the input-current side of the board. For higher-current applications, you can solder wires directly to the through-holes that best match your wires, or you can use solderless ring terminal connectors. The largest pair of through-holes are big enough for #6 screws.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/ACS724_-_connection_options.jpg?v=1712670516\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarning\u003c\/strong\u003e: This product is intended for use below 30V. Working with higher voltages can be extremely dangerous and should only be attempted by qualified individuals with appropriate equipment and protective gear.\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003eThis board ships assembled with all surface mount components, and a 3×1 strip of 0.1″ header pins is included but not soldered in.\u003c\/p\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1664\/ACS724-Datasheet.pdf\"\u003eAllegro ACS724 current sensor datasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1989\/acs724-current-sensor-carrier-dimensions.pdf\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1985\/acs724-current-sensor-carrier.step\"\u003e3D Model\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1991\/cs01a-drill.dxf\"\u003eDrill guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1984\/AN296169-ACS720-Bandwidth-Testing.pdf\"\u003eAllegro Application Note AN296169: Characterizing System Bandwidth in Complex Current Sensor Applications\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":50847451087121,"sku":"POL-4040","price":6.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/pololu-acs724-current-sensor-carrier-2-5a-to-2-5a-pololu-pol-4040-41886542463171.jpg?v=1735213449","url":"https:\/\/abcd3032.myshopify.com\/zh\/products\/pololu-acs724-current-sensor-carrier-2-5a-to-2-5a","provider":"Tayyab Zak","version":"1.0","type":"link"}