DAC8734SPFB

{
  "slug": "dac8734spfb",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Digital To Analog Converters (DAC), TQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "dac8734spfb",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "README.md",
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    "dac8734spfb.step",
    "dac8734spfb.lbr",
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    "docs/dac8734spfb-datasheet.pdf",
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  "component": {
    "mpn": "DAC8734SPFB",
    "manufacturer": "Texas Instruments",
    "package": "TQFP-48(7x7)",
    "pin_count": 48,
    "category": "Data Acquisition",
    "subcategory": "Digital To Analog Converters (DAC)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/dac8734",
    "parts": {
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      "footprint": "dac8734spfb.kicad_mod",
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      "model_3d_step_plain": "dac8734spfb.step",
      "lbr": "dac8734spfb.lbr"
    },
    "distributor_links": {
      "lcsc": "C1555661",
      "digikey": "296-25117-ND",
      "mouser": "595-DAC8734SPFB"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T00:51:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-25117-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-DAC8734SPFB",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "2",
        "name": "CS",
        "type": "input",
        "description": "SPI bus chip select input, active low; data are clocked into the shift register only while CS is low, and SDO is high-impedance when CS is high."
      },
      {
        "number": "3",
        "name": "SCLK",
        "type": "input",
        "description": "SPI bus clock input, operating at up to 50 MHz; data are latched on SCLK falling edges while CS is low."
      },
      {
        "number": "4",
        "name": "SDI",
        "type": "input",
        "description": "SPI bus serial data input, latched on SCLK falling edges while CS is low and ignored when CS is high."
      },
      {
        "number": "5",
        "name": "SDO",
        "type": "output",
        "description": "SPI serial data output used for daisy-chaining; it is enabled only after the DSDO bit in the Command Register is cleared and is high-impedance when CS is high."
      },
      {
        "number": "6",
        "name": "LDAC",
        "type": "input",
        "description": "Active-low asynchronous load input that transfers the input data register contents to the DAC latch, making the latch transparent while low."
      },
      {
        "number": "7",
        "name": "RST",
        "type": "input",
        "description": "Active-low reset input that resets the input registers and DACs to the UNI/BIP-defined values (outputs at 0V) and sets the gain and zero registers to default values."
      },
      {
        "number": "8",
        "name": "GPIO-0",
        "type": "bidirectional",
        "description": "General-purpose digital I/O with open-drain output; a 10kΩ pull-up to IOVDD is required when used as an output."
      },
      {
        "number": "9",
        "name": "GPIO-1",
        "type": "bidirectional",
        "description": "General-purpose digital I/O with open-drain output; a 10kΩ pull-up to IOVDD is required when used as an output."
      },
      {
        "number": "10",
        "name": "UNI/BIP-A",
        "type": "input",
        "description": "Output mode select for group A (DAC-0 and DAC-1): tied to IOVDD for unipolar straight-binary output, tied to DGND for bipolar twos-complement output."
      },
      {
        "number": "11",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground and return path for digital currents."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "13",
        "name": "IOVDD",
        "type": "power_in",
        "description": "Interface power supply, specified from +1.8V up to DVDD in the electrical characteristics."
      },
      {
        "number": "14",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply, nominally 5V (±10% in the electrical characteristics); absolute maximum DVDD to DGND is 6V."
      },
      {
        "number": "15",
        "name": "VOUT-0",
        "type": "output",
        "description": "DAC-0 analog output; the output must stay between AVSS + 1.0V and AVDD − 1.0V to avoid saturation."
      },
      {
        "number": "16",
        "name": "RFB2-0",
        "type": "output",
        "description": "DAC-0 RFB2 feedback connection: tie to VOUT-0 for gain = 2, leave open for gain = 4."
      },
      {
        "number": "17",
        "name": "RFB1-0",
        "type": "output",
        "description": "DAC-0 RFB1 feedback connection, tied to VOUT-0 in both gain configurations."
      },
      {
        "number": "18",
        "name": "SGND-0",
        "type": "power_in",
        "description": "DAC-0 signal ground, which must be connected to REFGND-A with a very low-resistance path."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "20",
        "name": "SGND-1",
        "type": "power_in",
        "description": "DAC-1 signal ground, which must be connected to REFGND-A with a very low-resistance path."
      },
      {
        "number": "21",
        "name": "RFB1-1",
        "type": "output",
        "description": "DAC-1 RFB1 feedback connection, tied to VOUT-1 in both gain configurations."
      },
      {
        "number": "22",
        "name": "RFB2-1",
        "type": "output",
        "description": "DAC-1 RFB2 feedback connection: tie to VOUT-1 for gain = 2, leave open for gain = 4."
      },
      {
        "number": "23",
        "name": "VOUT-1",
        "type": "output",
        "description": "DAC-1 analog output; the output must stay between AVSS + 1.0V and AVDD − 1.0V to avoid saturation."
      },
      {
        "number": "24",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "26",
        "name": "AVDD",
        "type": "power_in",
        "description": "Positive analog power supply; AVDD must be between 4.75V and 24V, with AVDD − AVSS ≤ 36V."
      },
      {
        "number": "27",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog power ground for the DAC, which must be connected to REFGND-A and REFGND-B and to DGND at a single star point."
      },
      {
        "number": "28",
        "name": "AVSS",
        "type": "power_in",
        "description": "Negative analog power supply; AVSS must be no greater than −4.75V and no less than −18V."
      },
      {
        "number": "29",
        "name": "REFGND-A",
        "type": "power_in",
        "description": "Reference ground for REF-A, which must be connected to AGND."
      },
      {
        "number": "30",
        "name": "REF-A",
        "type": "input",
        "description": "Group A (DAC-0, DAC-1) reference input; it should be applied after AVDD comes up to avoid turning on ESD circuitry."
      },
      {
        "number": "31",
        "name": "REF-B",
        "type": "input",
        "description": "Group B (DAC-2, DAC-3) reference input; it should be applied after AVDD comes up to avoid turning on ESD circuitry."
      },
      {
        "number": "32",
        "name": "REFGND-B",
        "type": "power_in",
        "description": "Reference ground for REF-B, which must be connected to AGND."
      },
      {
        "number": "33",
        "name": "AVSS",
        "type": "power_in",
        "description": "Negative analog power supply; AVSS must be no greater than −4.75V and no less than −18V."
      },
      {
        "number": "34",
        "name": "VMON",
        "type": "output",
        "description": "Analog monitor output that routes one DAC output or AIN, or is high-impedance when disabled; its output impedance is about 2.2kΩ, so it should be measured with a high-impedance input."
      },
      {
        "number": "35",
        "name": "AVDD",
        "type": "power_in",
        "description": "Positive analog power supply; AVDD must be between 4.75V and 24V, with AVDD − AVSS ≤ 36V."
      },
      {
        "number": "36",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "37",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "38",
        "name": "VOUT-3",
        "type": "output",
        "description": "DAC-3 analog output; the output must stay between AVSS + 1.0V and AVDD − 1.0V to avoid saturation."
      },
      {
        "number": "39",
        "name": "RFB2-3",
        "type": "output",
        "description": "DAC-3 RFB2 feedback connection: tie to VOUT-3 for gain = 2, leave open for gain = 4."
      },
      {
        "number": "40",
        "name": "RFB1-3",
        "type": "output",
        "description": "DAC-3 RFB1 feedback connection, tied to VOUT-3 in both gain configurations."
      },
      {
        "number": "41",
        "name": "SGND-3",
        "type": "power_in",
        "description": "DAC-3 signal ground, which must be connected to REFGND-B with a very low-resistance path."
      },
      {
        "number": "42",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "43",
        "name": "SGND-2",
        "type": "power_in",
        "description": "DAC-2 signal ground, which must be connected to REFGND-B with a very low-resistance path."
      },
      {
        "number": "44",
        "name": "RFB1-2",
        "type": "output",
        "description": "DAC-2 RFB1 feedback connection, tied to VOUT-2 in both gain configurations."
      },
      {
        "number": "45",
        "name": "RFB2-2",
        "type": "output",
        "description": "DAC-2 RFB2 feedback connection: tie to VOUT-2 for gain = 2, leave open for gain = 4."
      },
      {
        "number": "46",
        "name": "VOUT-2",
        "type": "output",
        "description": "DAC-2 analog output; the output must stay between AVSS + 1.0V and AVDD − 1.0V to avoid saturation."
      },
      {
        "number": "47",
        "name": "AIN",
        "type": "input",
        "description": "Auxiliary analog input connected to the analog monitor multiplexer; absolute range is AVSS − 0.3V to AVDD + 0.3V."
      },
      {
        "number": "48",
        "name": "UNI/BIP-B",
        "type": "input",
        "description": "Output mode select for group B (DAC-2 and DAC-3): tied to IOVDD for unipolar straight-binary output, tied to DGND for bipolar twos-complement output."
      }
    ],
    "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: Pins listed as NC in the TQFP-48 column of the PIN DESCRIPTIONS table; typed as unconnected.; RFB1/RFB2 feedback pins are labeled 'O' in the datasheet pin table; typed as output as printed, thou; The pin drawings in the extracted text have garbled pin numbering, so the mapping was taken from the"
        ],
        "pages_sent": 14,
        "cost_usd": 0.1286,
        "at": "2026-10-08T00:50:44"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/dac8734",
        "pages": 51,
        "sha256": "6fd4329aabd41484",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "14ca7676e4932e92f0eca0c6d56ce3018cd28a2531204a70ab7bbacb3eeb3cf5",
        "checked": "2026-10-08",
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        "sha256": "d06ff490cdc781e309a2680ccf7872c3e24be60c475fc066f5de5adddaad36a6",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}