{"product_id":"isolated-voltage-measurement-with-1v-input-differential-output-and-integrated-dc-dc-converter","title":"Isolated Voltage-Measurement with ±1V Input, Differential Output and Integrated DC\/DC Converter","description":"\u003cp\u003eThis product can be used in bidirectional high-voltage measurements. The output is fully isolated from the input side and can be used for applications such as high-voltage DC-DC converters, High-Voltage EV chargers, SMPS, 3 Phase motor drivers, inverters, etc. The board is built using the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAMC3330\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echip. This chip is a precision, isolated amplifier with a fully integrated, isolated DC\/DC converter that allows single-supply operation from the low side of the device. The reinforced capacitive isolation barrier is certified according to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eVDE V 0884-11\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eUL1577\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand separates sections of the system that operate on different common-mode voltage levels and protect low-voltage domains from damage. The circuit senses high voltage in the range from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e-1V to 1V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross resistor dividers R11, R4, R5, R8, and R12 and provides differential analog output\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOut-P\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOut-N.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe integrated isolated DC\/DC converter allows the measurement of non-ground-referenced signals.\u003c\/p\u003e\n\u003cp\u003eThe board offers a differential analog output comprised of OUTP and OUTN pins. For differential input voltages (VINP – VINN) in the range from –1 V to 1 V, the device provides a linear response with a nominal gain of 2. For example, for a differential input voltage of 1 V, the differential output voltage (VOUTP – VOUTN) is 2 V. At zero input (INP shorted to INN), both pins output the same voltage, VCMout. For absolute differential input voltages greater than 1.0 V but less than 1.25 V, the differential output voltage continues to increase in magnitude but with reduced linearity performance.\u003c\/p\u003e\n\u003ch3\u003eVoltage Range and Divider Resistor Calculation\u003c\/h3\u003e\n\u003cp\u003eThe board is optimized for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e230V AC measurements\u003c\/strong\u003e, thus it can be modified for higher or lower voltage measurement range by altering the value of divider resistors R11, R4, R5, R8, R12. Current through resistor divider is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100uA\u003c\/strong\u003e, resulting in voltage drop on sense resistor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eR5 = 1V\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor 230V-RMS Line Voltage (Peak Voltage 325V) R11=20K + R4=1.6M, R5 = 10K, R12 = 20K + R8=1.6M Tolerance 1%\u003c\/li\u003e\n\u003cli\u003eFor 120V-RMS Line Voltage (Peak Voltage 170V) R11=25K + R4=820K, R5 = 10K, R12 = 25K + R8=820K Tolerance 1%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnections and Other Important Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCN1: Pin 1 = DIAG, PIN 2 = No Use, Pin 3 = Op, Pin 4 = GND\u003c\/li\u003e\n\u003cli\u003eCN2: Pin 1 = VDD 5V DC In, Pin 2 = Output-P, Pin 3 = Output-N, Pin 4 = GND\u003c\/li\u003e\n\u003cli\u003eCN3: Pin 1 = Primary Input +P, Pin 2 = Primary Input -N\u003c\/li\u003e\n\u003cli\u003eD1: Power LED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply Input 5V DC (Range 3.3V to 5V)\u003c\/li\u003e\n\u003cli\u003e±1-V input voltage range optimized for voltage measurements with a high input impedance\u003c\/li\u003e\n\u003cli\u003eFixed gain: 2.0\u003c\/li\u003e\n\u003cli\u003e6000-VPK reinforced isolation\u003c\/li\u003e\n\u003cli\u003eLow DC errors: – Gain error: ±0.2% (max) – Gain drift: ±45 ppm\/°C (max) – Offset error: ±0.3 mV (max) – Offset drift: ±4 µV\/°C (max) – Nonlinearity: ±0.02% (max)\u003c\/li\u003e\n\u003cli\u003eCommon Mode Output 1.44V (Voltage Output at zero 1.44V)\u003c\/li\u003e\n\u003cli\u003eClipping Differential Output Voltage +\/-2.49V (VOUT = (VOUTP – VOUTN); |VIN| = |VINP – VINN| \u0026gt; VClipping)\u003c\/li\u003e\n\u003cli\u003eOutput Short-circuit Current 14mA\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 53.98 x 19.69mm\u003c\/li\u003e\n\u003cli\u003e4 x 2.5 mm Mounting Holes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47200720847020,"sku":"S125","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/S125A.jpg?v=1789366295","url":"https:\/\/dotfry.com\/products\/isolated-voltage-measurement-with-1v-input-differential-output-and-integrated-dc-dc-converter","provider":"dotfry","version":"1.0","type":"link"}