component
MCP3918A1-E
Public Made by Adomby adom
Microchip Tech Energy Metering ICs, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"component": {
"mpn": "MCP3918A1-E",
"manufacturer": "Microchip Tech",
"package": "QFN-20-EP(4x4)",
"pin_count": 21,
"category": "ADC/DAC/Data Conversion",
"subcategory": "Energy Metering ICs",
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"source": "Component Ocean /api/assign-pns",
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"status": "no match"
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"pins": [
{
"number": "1",
"name": "CH0+",
"type": "input",
"description": "Noninverting analog input for channel 0; linear range is ±600 mV/GAIN with VREF = 1.2V, and absolute input is ±1V with no distortion (±2V with no breaking) relative to AGND."
},
{
"number": "2",
"name": "CH0-",
"type": "input",
"description": "Inverting analog input for channel 0; linear range is ±600 mV/GAIN with VREF = 1.2V, and absolute input is ±1V with no distortion (±2V with no breaking) relative to AGND."
},
{
"number": "3",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "4",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "5",
"name": "AGND",
"type": "power_in",
"description": "Analog ground, return path for internal analog circuitry; recommended to connect to the same ground node as DGND, preferably with a star connection."
},
{
"number": "6",
"name": "REFIN+/OUT",
"type": "bidirectional",
"description": "Noninverting voltage reference input or internal reference output (internal reference enabled when VREFEXT = 0); minimal drive capability, a 0.1 µF ceramic capacitor is sufficient in most cases."
},
{
"number": "7",
"name": "REFIN-",
"type": "input",
"description": "Inverting voltage reference input pin."
},
{
"number": "8",
"name": "DGND",
"type": "power_in",
"description": "Digital ground, return path for internal digital circuitry."
},
{
"number": "9",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "10",
"name": "MDAT0",
"type": "output",
"description": "Modulator data output pin for channel 0."
},
{
"number": "11",
"name": "DR/GAIN1",
"type": "bidirectional",
"description": "Active-low data ready output pulse (half a DMCLK period wide) or GAIN1 logic input in Two-Wire mode; can be high-impedance or driven high when inactive per DR_HIZ."
},
{
"number": "12",
"name": "OSC1/CLKI/GAIN0",
"type": "input",
"description": "Oscillator crystal connection, external clock input, or GAIN0 logic input."
},
{
"number": "13",
"name": "OSC2/MODE",
"type": "input",
"description": "Oscillator crystal connection or serial interface mode logic input."
},
{
"number": "14",
"name": "CS/BOOST",
"type": "input",
"description": "Serial interface chip select input or BOOST logic input."
},
{
"number": "15",
"name": "SCK/MCLK",
"type": "input",
"description": "Serial interface clock or master clock input."
},
{
"number": "16",
"name": "SDO",
"type": "output",
"description": "Serial interface data output (datasheet table lists it as 'Data Input Pin'); high-impedance during continuous write communication."
},
{
"number": "17",
"name": "SDI/OSR1",
"type": "input",
"description": "Serial interface data input or OSR1 logic input in Two-Wire mode."
},
{
"number": "18",
"name": "RESET/OSR0",
"type": "input",
"description": "Active-low Schmitt-trigger master reset in SPI mode (resets all registers to default) or OSR0 logic input in Two-Wire mode."
},
{
"number": "19",
"name": "DVDD",
"type": "power_in",
"description": "Digital power supply, maintained between 2.7V and 3.6V; bypass with typically 10 µF in parallel with 0.1 µF ceramic."
},
{
"number": "20",
"name": "AVDD",
"type": "power_in",
"description": "Analog power supply, maintained between 2.7V and 3.6V; bypass with typically 10 µF in parallel with 0.1 µF ceramic."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed thermal pad."
}
],
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Datasheet pin table describes SDO as 'Serial Interface Data Input Pin', which looks like a typo; typ; The datasheet text does not say what the exposed pad should be connected to. Typed as passive.; The MPN has no package suffix. The QFN column was used because of the package hint. The marking page"
],
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"cost_usd": 0.1579,
"at": "2026-10-30T11:56:52"
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"pages": 88,
"sha256": "b2e73ade8520fcca",
"source_tier": "mfr"
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"cad": "KiCad official (CC-BY-SA 4.0)",
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