CM1348-QFNTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "cm1348-qfntr",
  "title": "CM1348-QFNTR",
  "brief": "CIMO Analog To Digital Converters (ADC), QFN-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data acquisition",
    "cm1348-qfntr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CM1348-QFNTR",
    "manufacturer": "CIMO",
    "package": "QFN-48(7x7)",
    "pin_count": 49,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618864913075232768",
    "parts": {
      "symbol": "cm1348-qfntr.kicad_sym",
      "footprint": "cm1348-qfntr.kicad_mod",
      "model_3d": "cm1348-qfntr-hero.glb",
      "model_3d_plain": "cm1348-qfntr-etched.glb",
      "model_3d_step": "cm1348-qfntr-etched.step",
      "model_3d_step_plain": "cm1348-qfntr.step",
      "lbr": "cm1348-qfntr.lbr"
    },
    "distributor_links": {
      "lcsc": "C22446833"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T00:09:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "AIN3",
        "type": "input",
        "description": "Single-ended analog input channel 3 and differential input channel 1 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "2",
        "name": "AIN2",
        "type": "input",
        "description": "Single-ended analog input channel 2 and differential input channel 1 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "3",
        "name": "AIN1",
        "type": "input",
        "description": "Single-ended analog input channel 1 and differential input channel 0 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "4",
        "name": "AIN0",
        "type": "input",
        "description": "Single-ended analog input channel 0 and differential input channel 0 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "5",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog negative supply: 0 V for unipolar operation or −2.5 V for bipolar operation, with AVSS specified from −2.6 V to 0 V."
      },
      {
        "number": "6",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog positive supply: 5 V for unipolar operation or +2.5 V for bipolar operation; AVDD−AVSS is specified from 4.75 V to 5.25 V."
      },
      {
        "number": "7",
        "name": "PLLCAP",
        "type": "passive",
        "description": "PLL bypass capacitor pin; connect a 22 nF capacitor to AVSS when the crystal oscillator is used."
      },
      {
        "number": "8",
        "name": "XTAL1",
        "type": "passive",
        "description": "32.768 kHz crystal oscillator input pin 1, which must not be connected to any other circuit."
      },
      {
        "number": "9",
        "name": "XTAL2",
        "type": "passive",
        "description": "32.768 kHz crystal oscillator input pin 2, which must not be connected to any other circuit."
      },
      {
        "number": "10",
        "name": "PWDN",
        "type": "input",
        "description": "Power-down control; holding the pin low for more than 2 fCLK cycles enters low-power mode."
      },
      {
        "number": "11",
        "name": "RESET",
        "type": "input",
        "description": "Reset input; holding the pin low for more than 2 fCLK cycles resets the chip."
      },
      {
        "number": "12",
        "name": "CLKSEL",
        "type": "input",
        "description": "Clock select: low selects the crystal oscillator with fCLK output on CLKIO, high disables the crystal and feeds an external clock into CLKIO."
      },
      {
        "number": "13",
        "name": "CLKIO",
        "type": "bidirectional",
        "description": "System clock input or output depending on CLKSEL; external clock input range is 0.1 MHz to 16 MHz with 40% to 60% duty cycle."
      },
      {
        "number": "14",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 0; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "15",
        "name": "GPIO1",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 1; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "16",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 2; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "17",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 3; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "18",
        "name": "GPIO4",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 4; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "19",
        "name": "GPIO5",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 5; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "20",
        "name": "GPIO6",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 6; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "21",
        "name": "GPIO7",
        "type": "bidirectional",
        "description": "General-purpose digital input/output 7; pins default to input after power-on or reset and must not be left floating."
      },
      {
        "number": "22",
        "name": "SCLK",
        "type": "input",
        "description": "SPI interface clock input; data is latched on the rising edge and output on the falling edge."
      },
      {
        "number": "23",
        "name": "DIN",
        "type": "input",
        "description": "SPI interface data input."
      },
      {
        "number": "24",
        "name": "DOUT",
        "type": "output",
        "description": "SPI interface data output, which is tri-stated when CS is deasserted high."
      },
      {
        "number": "25",
        "name": "DRDY",
        "type": "output",
        "description": "Data-ready output, active low."
      },
      {
        "number": "26",
        "name": "START",
        "type": "input",
        "description": "Start-conversion input, active high; continuous conversion requires it held high."
      },
      {
        "number": "27",
        "name": "CS",
        "type": "input",
        "description": "SPI interface chip select input, active low."
      },
      {
        "number": "28",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital supply pin, specified at 2.7 V to 5.5 V in the pin table (2.7 V to 5.25 V in the electrical specification)."
      },
      {
        "number": "29",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "30",
        "name": "VREFN",
        "type": "input",
        "description": "Negative reference input; allowed range is AVSS−0.1 V to VREFP−1.2 V."
      },
      {
        "number": "31",
        "name": "VREFP",
        "type": "input",
        "description": "Positive reference input; allowed range is 4.096 V to AVDD, and VREF = VREFP−VREFN must be at least 4.096 V."
      },
      {
        "number": "32",
        "name": "AINCOM",
        "type": "input",
        "description": "Common reference ground for all single-ended inputs, which can be set within ±100 mV of the analog supply range."
      },
      {
        "number": "33",
        "name": "AIN15",
        "type": "input",
        "description": "Single-ended analog input channel 15 and differential input channel 7 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "34",
        "name": "AIN14",
        "type": "input",
        "description": "Single-ended analog input channel 14 and differential input channel 7 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "35",
        "name": "AIN13",
        "type": "input",
        "description": "Single-ended analog input channel 13 and differential input channel 6 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "36",
        "name": "AIN12",
        "type": "input",
        "description": "Single-ended analog input channel 12 and differential input channel 6 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "37",
        "name": "AIN11",
        "type": "input",
        "description": "Single-ended analog input channel 11 and differential input channel 5 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "38",
        "name": "AIN10",
        "type": "input",
        "description": "Single-ended analog input channel 10 and differential input channel 5 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "39",
        "name": "AIN9",
        "type": "input",
        "description": "Single-ended analog input channel 9 and differential input channel 4 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "40",
        "name": "AIN8",
        "type": "input",
        "description": "Single-ended analog input channel 8 and differential input channel 4 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "41",
        "name": "ADCINN",
        "type": "input",
        "description": "ADC differential input (−), which receives the externally conditioned signal when BYPAS = 1; ADC input is measured as VIN = ADCINP−ADCINN."
      },
      {
        "number": "42",
        "name": "ADCINP",
        "type": "input",
        "description": "ADC differential input (+), which receives the externally conditioned signal when BYPAS = 1; ADC input is measured as VIN = ADCINP−ADCINN."
      },
      {
        "number": "43",
        "name": "MUXOUTN",
        "type": "output",
        "description": "Multiplexer differential output (−) used to route the selected channel off-chip for external signal conditioning."
      },
      {
        "number": "44",
        "name": "MUXOUTP",
        "type": "output",
        "description": "Multiplexer differential output (+) used to route the selected channel off-chip for external signal conditioning."
      },
      {
        "number": "45",
        "name": "AIN7",
        "type": "input",
        "description": "Single-ended analog input channel 7 and differential input channel 3 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "46",
        "name": "AIN6",
        "type": "input",
        "description": "Single-ended analog input channel 6 and differential input channel 3 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "47",
        "name": "AIN5",
        "type": "input",
        "description": "Single-ended analog input channel 5 and differential input channel 2 (−); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "48",
        "name": "AIN4",
        "type": "input",
        "description": "Single-ended analog input channel 4 and differential input channel 2 (+); absolute voltage range is AVSS−0.1 V to AVDD+0.1 V relative to DGND."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists an exposed pad (EPAD) typed NC with no electrical connection, which is not a num; Analog-input and reference pins (AI) are mapped to KiCad 'input' and analog outputs (AO) to 'output'; DOUT is typed DO in the datasheet and mapped to 'output', but the datasheet states it is tri-stated ",
          "2/49 pins cited to the wrong page (name found elsewhere): ['8:XTAL1@p5', '9:XTAL2@p5']"
        ],
        "pages_sent": 37,
        "cost_usd": 0.17,
        "at": "2026-10-21T00:05:17"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618864913075232768",
        "pages": 37,
        "sha256": "a7ce7763f2144ffe",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cm1348-qfntr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cm1348-qfntr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "eedfa6d59a6d705f1bb81b1382a4728e6eb103cbcec3b442d67eddb8b7db65c7",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "CIMO",
      "Package": "QFN-48(7x7)",
      "Category": "Data Acquisition",
      "Pins": "49"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a7ce7763f2144ffe1e08aa50e7c460f7a738d6d4a0caa339c618647e132e692b",
      "rows": [
        {
          "name": "Operating temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 7,
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        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -60,
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          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Junction temperature",
          "symbol": "",
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          "unit": "°C",
          "min": null,
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        },
        {
          "name": "AVDD to AVSS",
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          "unit": "V",
          "min": -0.3,
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          "max": 5.5,
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        },
        {
          "name": "AVSS to DGND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2.8,
          "typ": null,
          "max": 0.3,
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        },
        {
          "name": "DVDD to DGND",
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        {
          "name": "Digital input to DGND",
          "symbol": "",
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          "unit": "V",
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          "conditions": "upper limit printed as DVDD+0.3",
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        },
        {
          "name": "ESD HBM, all pins except analog inputs",
          "symbol": "",
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          "max": 2000,
          "conditions": "HBM, all pins except analog inputs",
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        },
        {
          "name": "ESD HBM, analog input pins only",
          "symbol": "",
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          "conditions": "HBM, analog input pins only",
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        },
        {
          "name": "ESD CDM",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "CDM",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "DVDD digital supply voltage",
          "symbol": "DVDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 5.25,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "AVSS analog negative supply",
          "symbol": "AVSS",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -2.6,
          "typ": null,
          "max": 0,
          "conditions": "",
          "source_page": 9,
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        },
        {
          "name": "Input clock frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.1,
          "typ": null,
          "max": 16,
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          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input clock duty cycle",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 40,
          "typ": null,
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        },
        {
          "name": "Output data rate, auto-scan mode",
          "symbol": "",
          "kind": "electrical",
          "unit": "kSPS",
          "min": 1.859,
          "typ": null,
          "max": 29.52,
          "conditions": "自动扫描模式 (auto-scan mode)",
          "source_page": 8,
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        },
        {
          "name": "Integral nonlinearity (INL)",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "% of FSR",
          "min": null,
          "typ": 0.0003,
          "max": 0.001,
          "conditions": "差分输入 (differential input)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Offset error, chop enabled",
          "symbol": "",
          "kind": "electrical",
          "unit": "μV",
          "min": null,
          "typ": 1,
          "max": 10,
          "conditions": "输入短接，启用斩波 (CHOP = 1)",
          "source_page": 8,
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        },
        {
          "name": "Offset drift, chop enabled",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "μV/°C",
          "min": null,
          "typ": 0.02,
          "max": 0.1,
          "conditions": "启用斩波 (chop enabled)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Gain error",
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          "kind": "electrical",
          "unit": "%",
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        },
        {
          "name": "Gain drift",
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          "unit": "ppm/°C",
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          "typ": 0.4,
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        },
        {
          "name": "Common-mode rejection ratio (CMRR)",
          "symbol": "CMRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 90,
          "typ": 105,
          "max": null,
          "conditions": "fCM = 50Hz/60Hz",
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        },
        {
          "name": "Power supply rejection ratio, AVDD/AVSS",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 80,
          "typ": 95,
          "max": null,
          "conditions": "AVDD，AVSS，fPS = 50Hz/60Hz",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Power supply rejection ratio, DVDD",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 90,
          "typ": 100,
          "max": null,
          "conditions": "DVDD，fPS = 50Hz/60Hz",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Differential reference input range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.096,
          "typ": null,
          "max": null,
          "conditions": "VREF = VREFP - VREFN; upper limit printed as AVDD - AVSS",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "VREFP reference input",
          "symbol": "VREFP",
          "kind": "electrical",
          "unit": "V",
          "min": 4.096,
          "typ": null,
          "max": null,
          "conditions": "upper limit printed as AVDD",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "External reference voltage reading error",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": null,
          "typ": 1,
          "max": 3,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
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