{"product_id":"two-channel-current-sensor-for-high-voltage-range","title":"Two Channel Current Sensor for High Voltage Range","description":"\u003cp\u003e\u003cspan\u003eThis board is built using a 2 x \u003c\/span\u003e\u003cstrong\u003eINA149\u003c\/strong\u003e\u003cspan\u003e precision unity-gain difference amplifier with a very high input common-mode voltage range. The project can be used as a current sensor for high-voltage applications, INA149 provides a common-mode voltage range of \u003c\/span\u003e\u003cstrong\u003e+\/-275V\u003c\/strong\u003e\u003cspan\u003e. The project operates with a wide supply range from \u003c\/span\u003e\u003cstrong\u003e+\/-5V to +\/-15V\u003c\/strong\u003e\u003cspan\u003e.  The circuit measures current by sensing the voltage drop across a series of resistors R\u003c\/span\u003e\u003csub\u003eS\u003c\/sub\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003eR4\u003c\/strong\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cstrong\u003eR12.\u003c\/strong\u003e\u003cspan\u003e The application circuit shows the INA149 used to measure the supply currents of a device under test. The sense resistor imbalances the input resistor matching of the INA149, thus degrading its CMR. Also, the input impedance of the INA149 loads R\u003c\/span\u003e\u003csub\u003eS\u003c\/sub\u003e\u003cspan\u003e, causes a gain error in the voltage-to-current conversion. Both of these errors can be easily corrected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eCurrent Sense Resistors\u003c\/h3\u003e\n\u003cp\u003eThe board provides dual options for current sense resistors. Users may use THT resistors up to 3W R3, R11, or SMD 2512 R4 and R12 Up to 3W. The default circuit measures current up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2A\u003c\/strong\u003e. Choose the appropriate current sense resistor for a higher or lower current sense range.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply +\/-5V to +\/-15V (Wide Supply Range: ±2.0 V to ±18 V)\u003c\/li\u003e\n\u003cli\u003eOutput 500mV\/1A\u003c\/li\u003e\n\u003cli\u003eCommon-Mode Voltage Range: ±275 V\u003c\/li\u003e\n\u003cli\u003eMinimum CMRR: 90 dB from –40°C to +125°C\u003c\/li\u003e\n\u003cli\u003eDC Specifications: INA149\n\u003cul\u003e\n\u003cli\u003eMaximum Offset Voltage: 1100 µV\u003c\/li\u003e\n\u003cli\u003eMaximum Offset Voltage Drift: 15 µV\/°C\u003c\/li\u003e\n\u003cli\u003eMaximum Gain Error: 0.02%\u003c\/li\u003e\n\u003cli\u003eMaximum Gain Error Drift: 10 ppm\/°C\u003c\/li\u003e\n\u003cli\u003eMaximum Gain Nonlinearity: 0.001% FSR\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eAC Performance: INA149\n\u003cul\u003e\n\u003cli\u003eBandwidth: 500 kHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput Protection: INA149\n\u003cul\u003e\n\u003cli\u003eCommon-Mode: ±500 V\u003c\/li\u003e\n\u003cli\u003eDifferential: ±500 V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 46.36 x 33.34 mm\u003c\/li\u003e\n\u003cli\u003e4 x 3MM Mounting Holes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47071983370412,"sku":"S106","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/S106A.jpg?v=1787830297","url":"https:\/\/dotfry.com\/products\/two-channel-current-sensor-for-high-voltage-range","provider":"dotfry","version":"1.0","type":"link"}