{"product_id":"sparkfun-power-meter-acs37800-qwiic","title":"SparkFun Power Meter - ACS37800 (Qwiic)","description":"\u003cp\u003e\u003cstrong\u003eThe SparkFun Power Meter - ACS37800 (Qwiic) simultaneously measures voltage, current and power over I2C, using Hall-effect sensing to monitor loads up to 60VDC and 30A without a power-wasting shunt resistor.\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e \u003cp\u003eThe \u003ca href=\"\/collections\/sparkfun\" title=\"SparkFun Products\"\u003eSparkFun\u003c\/a\u003e \u003cstrong\u003ePower Meter\u003c\/strong\u003e is a comprehensive power sensing solution built around the\u003cstrong\u003e Allegro ACS37800\u003c\/strong\u003e \u003cstrong\u003epower monitor IC\u003c\/strong\u003e. Designed to slide seamlessly into your next \u003ca href=\"\/collections\/qwiic-stemma-qt\" title=\"Qwiic and STEMMA QT\"\u003eQwiic\u003c\/a\u003e project, this board allows you to monitor voltage (up to \u003cstrong\u003e60VDC\u003c\/strong\u003e) and current (up to \u003cstrong\u003e30A\u003c\/strong\u003e) simultaneously without cutting traces or managing complex wiring.\u003c\/p\u003e \u003cp\u003eIt is the perfect tool for tracking power consumption in high-demand systems like \u003ca href=\"\/collections\/adafruit-3d-printing\" title=\"3D Printing \u0026amp; CNC\"\u003e3D printers\u003c\/a\u003e, UAVs, and solar panels.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIsolated \u0026amp; Efficient Power Monitoring\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eUnlike traditional sensors that rely on hot, inefficient shunt resistors, the ACS37800 uses Hall-effect technology to measure current.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCool Operation:\u003c\/strong\u003e Because there is no shunt resistor, there is no heat generation or voltage drop, meaning the sensor itself doesn't waste the power it is trying to measure.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e The internal construction provides reinforced isolation between the current-carrying conductor and the sensing electronics, keeping your logic-level microcontroller safe from the high-current path.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/SEN-29259_-_Wired_up_image.jpg?v=1788527376\" alt=\"\"\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eSmart Monitoring\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThis chip does more than just read raw numbers. It offers key power parameters accessed directly through its I2C interface:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eComplete Data:\u003c\/strong\u003e Reads Voltage, Current, and Power simultaneously.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOnboard Intelligence:\u003c\/strong\u003e Features dedicated pins for zero-crossing detection and fast overcurrent fault reporting.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfigurable:\u003c\/strong\u003e You can adjust settings like over\/under-voltage thresholds directly via the Qwiic interface and save them to the chip’s onboard EEPROM.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIs This the Right Power Meter for You?\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eWhile the ACS37800 Qwiic Power Meter is excellent for heavy loads, including motor control, battery charging, solar arrays, and devices drawing less than \u003cstrong\u003e1 Amp\u003c\/strong\u003e, it is not suitable for low-current applications such as microcontrollers in sleep mode, single LEDs, or applications requiring milliamp-level precision. The ACS37800 has a \u003cstrong\u003enoise floor of approximately ±0.1A RMS\u003c\/strong\u003e on its current channel.\u003c\/p\u003e \u003ch2\u003eFeatures and Specifications\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eAllegro MicroSystems ACS37800\u003cbr\u003e \u003cul\u003e \u003cli\u003eUL 60950-1 (ed. 2) and UL 62368-1 (ed. 1) certified\u003c\/li\u003e \u003cli\u003eReinforced isolation up to 517 VRMS\u003c\/li\u003e \u003cli\u003e0.85 mΩ primary conductor resistance for low power loss\u003c\/li\u003e \u003cli\u003eCompatible with floating and non-floating GND\u003c\/li\u003e \u003cli\u003e1 kHz bandwidth\u003c\/li\u003e \u003cli\u003eCurrent sensing range up to +\/- 30 A\u003c\/li\u003e \u003cli\u003eDefault I2C address: 0x60\u003c\/li\u003e \u003cli\u003eI2C address can be changed and stored in EEPROM\u003c\/li\u003e \u003cli\u003eVoltage channel RMS noise: +\/-0.3mV\u003c\/li\u003e \u003cli\u003eCurrent channel RMS noise: +\/-0.1A\u003c\/li\u003e \u003cli\u003eVoltage channel total output error: +\/-1% (-40°C to 125°C)\u003c\/li\u003e \u003cli\u003eCurrent channel total output error: +\/-2% (25°C to 125°C)\u003c\/li\u003e \u003cli\u003eCurrent channel total output error: +\/-2.7% (-40°C to 25°C)\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003cli\u003eTwo 0.25” (6mm) through-holes for high current connections\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eResources\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/1\/9\/f\/6\/9\/Qwiic_Power_Meter-ACS37800_Schematic.pdf\" target=\"_blank\" rel=\"noopener\" title=\"Schematic\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/f\/5\/a\/4\/e\/Qwiic_Power_Meter-ACS37800.zip\" target=\"_blank\" rel=\"noopener\" title=\"Eagle Files\"\u003eEagle Files\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/5\/c\/9\/9\/3\/Qwiic_Power_Meter-ACS37800.jpg\" target=\"_blank\" rel=\"noopener\" title=\"Board Dimensions\"\u003eBoard Dimensions\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/docs.sparkfun.com\/SparkFun_Qwiic_Power_Meter_ACS37800\" target=\"_blank\" rel=\"noopener\" title=\"Hookup Guide\"\u003eHookup Guide\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\n\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/d\/f\/8\/5\/4\/ACS37800-Datasheet.pdf\" target=\"_blank\" rel=\"noopener\" title=\"Datasheet\"\u003eDatasheet\u003c\/a\u003e (ACS37800)\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/github.com\/sparkfun\/SparkFun_ACS37800_Power_Monitor_Arduino_Library\" target=\"_blank\" rel=\"noopener\" title=\"SparkFun Arduino Library\"\u003eSparkFun Arduino Library\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/github.com\/sparkfunX\/Qwiic_Power_Meter-ACS37800\" target=\"_blank\" rel=\"noopener\" title=\"GitHub Hardware Repo\"\u003eGitHub Hardware Repo\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003ePackage Contents\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e1x SparkFun Power Meter - ACS37800 (Qwiic)\u003c\/li\u003e \u003c\/ul\u003e","brand":"Sparkfun","offers":[{"title":"Default Title","offer_id":56223457214849,"sku":"SEN-29259","price":19.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/sparkfun-power-meter-acs37800-qwiic-sparkfun-sen-29259-1257097904.jpg?v=1788533080","url":"https:\/\/thepihut.com\/products\/sparkfun-power-meter-acs37800-qwiic","provider":"The Pi Hut","version":"1.0","type":"link"}