component
MCP3912A1-E
Public Made by Adomby adom
Microchip Tech Analog To Digital Converters (ADCs), QFN-28(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"description": "Microchip Tech Analog To Digital Converters (ADCs), QFN-28(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "MCP3912A1-E",
"manufacturer": "Microchip Tech",
"package": "QFN-28(5x5)",
"pin_count": 29,
"category": "ADC/DAC/Data Conversion",
"subcategory": "Analog To Digital Converters (ADCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/f1b0493a1ef4661517c20386fe740a04.pdf",
"parts": {
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"lbr": "mcp3912a1-e.lbr"
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"distributor_links": {
"lcsc": "C638795"
},
"distributor_check": {
"checked_at": "2026-10-24T00:27:36Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
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},
"pins": [
{
"number": "1",
"name": "CH1-",
"type": "input",
"description": "Inverting analog input for channel 1; max absolute voltage vs AGND is ±1V with no distortion and ±2V with no breakdown."
},
{
"number": "2",
"name": "CH1+",
"type": "input",
"description": "Noninverting analog input for channel 1; linear range is ±600 mV/GAIN with VREF = 1.2V."
},
{
"number": "3",
"name": "CH2+",
"type": "input",
"description": "Noninverting analog input for channel 2; linear range is ±600 mV/GAIN with VREF = 1.2V."
},
{
"number": "4",
"name": "CH2-",
"type": "input",
"description": "Inverting analog input for channel 2; max absolute voltage vs AGND is ±1V with no distortion and ±2V with no breakdown."
},
{
"number": "5",
"name": "CH3-",
"type": "input",
"description": "Inverting analog input for channel 3; max absolute voltage vs AGND is ±1V with no distortion and ±2V with no breakdown."
},
{
"number": "6",
"name": "CH3+",
"type": "input",
"description": "Noninverting analog input for channel 3; linear range is ±600 mV/GAIN with VREF = 1.2V."
},
{
"number": "7",
"name": "NC",
"type": "unconnected",
"description": "No connect; for better EMI results, connect to AGND."
},
{
"number": "8",
"name": "REFIN+/OUT",
"type": "bidirectional",
"description": "Noninverting voltage reference input and internal reference output; internal reference has minimal drive capability and needs buffering and a 0.1 µF ceramic bypass if used as a source."
},
{
"number": "9",
"name": "REFIN-",
"type": "input",
"description": "Inverting voltage reference input; connect directly to AGND when using the internal or a single-ended reference."
},
{
"number": "10",
"name": "AGND",
"type": "power_in",
"description": "Analog ground, return path for internal analog circuitry; star-connect with pin 26 and to the same node as DGND."
},
{
"number": "11",
"name": "AVDD",
"type": "power_in",
"description": "Analog power supply, 2.7V to 3.6V; connect with pin 25 and bypass with 10 µF in parallel with 0.1 µF ceramic."
},
{
"number": "12",
"name": "DVDD",
"type": "power_in",
"description": "Digital power supply pin, 2.7V to 3.6V."
},
{
"number": "13",
"name": "DGND",
"type": "power_in",
"description": "Digital ground, return path for internal digital circuitry; star-connect with pins 15 and 23 and to the same node as AGND."
},
{
"number": "14",
"name": "DR",
"type": "output",
"description": "Data ready output giving an active-low pulse of half a DMCLK period when new ADC data are available; high-impedance or logic high when inactive per DR_HIZ."
},
{
"number": "15",
"name": "DGND",
"type": "power_in",
"description": "Digital ground, return path for internal digital circuitry; star-connect with pins 13 and 23."
},
{
"number": "16",
"name": "OSC1/CLKI",
"type": "input",
"description": "Oscillator crystal connection or external clock input."
},
{
"number": "17",
"name": "OSC2",
"type": "passive",
"description": "Oscillator crystal connection pin."
},
{
"number": "18",
"name": "CS",
"type": "input",
"description": "Serial interface chip select input; falling edge starts and rising edge ends an SPI communication, SDO is high-impedance when CS is high."
},
{
"number": "19",
"name": "SCK",
"type": "input",
"description": "Serial interface clock input for SPI Mode 0,0 and 1,1, up to 20 MHz."
},
{
"number": "20",
"name": "SDO",
"type": "tri_state",
"description": "Serial interface data output clocked out on the falling edge of SCK; high-impedance when CS is high."
},
{
"number": "21",
"name": "SDI",
"type": "input",
"description": "Serial interface data input latched on the rising edge of SCK."
},
{
"number": "22",
"name": "RESET",
"type": "input",
"description": "Master reset logic input acting as a hard reset to the default power-up configuration."
},
{
"number": "23",
"name": "DGND",
"type": "power_in",
"description": "Digital ground, return path for internal digital circuitry; star-connect with pins 13 and 15."
},
{
"number": "24",
"name": "DVDD",
"type": "power_in",
"description": "Digital power supply pin, 2.7V to 3.6V."
},
{
"number": "25",
"name": "AVDD",
"type": "power_in",
"description": "Analog power supply, 2.7V to 3.6V; connect with pin 11 and bypass with 10 µF in parallel with 0.1 µF ceramic."
},
{
"number": "26",
"name": "AGND",
"type": "power_in",
"description": "Analog ground, return path for internal analog circuitry; star-connect with pin 10 and to the same node as DGND."
},
{
"number": "27",
"name": "CH0+",
"type": "input",
"description": "Noninverting analog input for channel 0; linear range is ±600 mV/GAIN with VREF = 1.2V."
},
{
"number": "28",
"name": "CH0-",
"type": "input",
"description": "Inverting analog input for channel 0; max absolute voltage vs AGND is ±1V with no distortion and ±2V with no breakdown."
},
{
"number": "29",
"name": "EP",
"type": "passive",
"description": "Exposed thermal pad; must be connected to AGND or floating."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Table 3-1 prints QFN pin '29' for CH1-, but the QFN has 28 leads and 29 is the exposed pad. Pin 1 is; Table 3-1 lists DVDD on QFN pins '12, 14', but pin 14 is also listed as DR. Pin 24 appears nowhere i; Datasheet gives no electrical type for OSC2 (crystal pin). It was set to passive, which is an assump",
"2/29 pins cited to the wrong page (name found elsewhere): ['14:DR@p46', '17:OSC2@p17']"
],
"pages_sent": 16,
"cost_usd": 0.2004,
"at": "2026-10-24T00:27:27"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/f1b0493a1ef4661517c20386fe740a04.pdf",
"pages": 84,
"sha256": "ccb784a37702432f",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 29,
"described": 29,
"cites_pages": true,
"refuses_to_fabricate": true
}
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