DAC8734SRHAR

{
  "slug": "dac8734srhar",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Digital To Analog Converters (DACs), VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "adc-dac-data conversion",
    "dac8734srhar",
    "factory-2.0.0",
    "extractor-text"
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  "dependencies": {},
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    "path": "docs/hero.png"
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    "dac8734srhar.glb",
    "dac8734srhar.step",
    "dac8734srhar.lbr",
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    "docs/dac8734srhar-datasheet.pdf",
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    "viewers/footprint.html",
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  "component": {
    "mpn": "DAC8734SRHAR",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-40-EP(6x6)",
    "pin_count": 41,
    "category": "ADC/DAC/Data Conversion",
    "subcategory": "Digital To Analog Converters (DACs)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/dac8734",
    "parts": {
      "symbol": "dac8734srhar.kicad_sym",
      "footprint": "dac8734srhar.kicad_mod",
      "model_3d": "dac8734srhar-hero.glb",
      "model_3d_plain": "dac8734srhar.glb",
      "model_3d_step": "dac8734srhar-etched.step",
      "model_3d_step_plain": "dac8734srhar.step",
      "lbr": "dac8734srhar.lbr"
    },
    "distributor_links": {
      "lcsc": "C2680073",
      "digikey": "DAC8734SRHAR-ND",
      "mouser": "595-DAC8734SRHAR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T02:19:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "DAC8734SRHAR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-DAC8734SRHAR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "SPI chip select input (active low); data not clocked into shift register unless CS is low."
      },
      {
        "number": "2",
        "name": "SCLK",
        "type": "input",
        "description": "SPI bus clock; data latched on falling edge of SCLK while CS is low, supports up to 50MHz."
      },
      {
        "number": "3",
        "name": "SDI",
        "type": "input",
        "description": "SPI bus input data; 24-bit word loaded MSB first under SCLK control."
      },
      {
        "number": "4",
        "name": "SDO",
        "type": "tri_state",
        "description": "SPI data output (tri-state); high-impedance when CS is high, can daisy-chain to next device SDI."
      },
      {
        "number": "5",
        "name": "LDAC",
        "type": "input",
        "description": "Load DAC latch control input (active low); transfers Input Data Register to DAC latch and updates outputs."
      },
      {
        "number": "6",
        "name": "RST",
        "type": "input",
        "description": "Reset input (active low); resets input registers and DACs to values defined by UNI/BIP pins."
      },
      {
        "number": "7",
        "name": "GPIO-0",
        "type": "bidirectional",
        "description": "General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output."
      },
      {
        "number": "8",
        "name": "GPIO-1",
        "type": "bidirectional",
        "description": "General-purpose bidirectional digital I/O with open-drain output; requires 10kΩ pull-up resistor to IOVDD when used as output."
      },
      {
        "number": "9",
        "name": "UNI/BIP-A",
        "type": "input",
        "description": "Output mode selection for group A (DAC-0, DAC-1); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V)."
      },
      {
        "number": "10",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground; return path for digital circuits."
      },
      {
        "number": "11",
        "name": "IOVDD",
        "type": "power_in",
        "description": "Interface logic power supply; 1.8V to DVDD, supports 1.8V/3V/5V logic levels."
      },
      {
        "number": "12",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital power supply; 2.7V to 5.5V, powers digital circuits and SPI interface."
      },
      {
        "number": "13",
        "name": "VOUT-0",
        "type": "output",
        "description": "DAC-0 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."
      },
      {
        "number": "14",
        "name": "RFB2-0",
        "type": "output",
        "description": "DAC-0 RFB2 feedback resistor pin; connect to VOUT-0 with RFB1-0 for gain=2, leave open for gain=4."
      },
      {
        "number": "15",
        "name": "RFB1-0",
        "type": "output",
        "description": "DAC-0 RFB1 feedback resistor pin; connect to VOUT-0 for gain=2 or gain=4 configurations."
      },
      {
        "number": "16",
        "name": "SGND-0",
        "type": "power_in",
        "description": "DAC-0 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity."
      },
      {
        "number": "17",
        "name": "SGND-1",
        "type": "power_in",
        "description": "DAC-1 signal ground; connect to REFGND-A with very low impedance trace for optimal linearity."
      },
      {
        "number": "18",
        "name": "RFB1-1",
        "type": "output",
        "description": "DAC-1 RFB1 feedback resistor pin; connect to VOUT-1 for gain=2 or gain=4 configurations."
      },
      {
        "number": "19",
        "name": "RFB2-1",
        "type": "output",
        "description": "DAC-1 RFB2 feedback resistor pin; connect to VOUT-1 with RFB1-1 for gain=2, leave open for gain=4."
      },
      {
        "number": "20",
        "name": "VOUT-1",
        "type": "output",
        "description": "DAC-1 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."
      },
      {
        "number": "21",
        "name": "AVDD",
        "type": "power_in",
        "description": "Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages."
      },
      {
        "number": "22",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; power ground for DAC, must connect to REFGND-A and REFGND-B."
      },
      {
        "number": "23",
        "name": "AVSS",
        "type": "power_in",
        "description": "Negative analog power supply; -18V to -4.75V, provides return path for analog power."
      },
      {
        "number": "24",
        "name": "REFGND-A",
        "type": "power_in",
        "description": "Reference ground for REF-A; connect to AGND and SGND-0/SGND-1 with very low impedance traces."
      },
      {
        "number": "25",
        "name": "REF-A",
        "type": "input",
        "description": "Reference input for group A (DAC-0, DAC-1); typically +5V, sets output span for group A channels."
      },
      {
        "number": "26",
        "name": "REF-B",
        "type": "input",
        "description": "Reference input for group B (DAC-2, DAC-3); typically +5V, sets output span for group B channels."
      },
      {
        "number": "27",
        "name": "REFGND-B",
        "type": "power_in",
        "description": "Reference ground for REF-B; connect to AGND and SGND-2/SGND-3 with very low impedance traces."
      },
      {
        "number": "28",
        "name": "AVSS",
        "type": "power_in",
        "description": "Negative analog power supply; -18V to -4.75V, provides return path for analog power."
      },
      {
        "number": "29",
        "name": "VMON",
        "type": "output",
        "description": "Analog monitor output (high-impedance when disabled); multiplexes one of four DAC outputs or AIN via Monitor Register."
      },
      {
        "number": "30",
        "name": "AVDD",
        "type": "power_in",
        "description": "Positive analog power supply; 4.75V to 24V, powers analog reference buffers and output stages."
      },
      {
        "number": "31",
        "name": "VOUT-3",
        "type": "output",
        "description": "DAC-3 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."
      },
      {
        "number": "32",
        "name": "RFB2-3",
        "type": "output",
        "description": "DAC-3 RFB2 feedback resistor pin; connect to VOUT-3 with RFB1-3 for gain=2, leave open for gain=4."
      },
      {
        "number": "33",
        "name": "RFB1-3",
        "type": "output",
        "description": "DAC-3 RFB1 feedback resistor pin; connect to VOUT-3 for gain=2 or gain=4 configurations."
      },
      {
        "number": "34",
        "name": "SGND-3",
        "type": "power_in",
        "description": "DAC-3 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity."
      },
      {
        "number": "35",
        "name": "SGND-2",
        "type": "power_in",
        "description": "DAC-2 signal ground; connect to REFGND-B with very low impedance trace for optimal linearity."
      },
      {
        "number": "36",
        "name": "RFB1-2",
        "type": "output",
        "description": "DAC-2 RFB1 feedback resistor pin; connect to VOUT-2 for gain=2 or gain=4 configurations."
      },
      {
        "number": "37",
        "name": "RFB2-2",
        "type": "output",
        "description": "DAC-2 RFB2 feedback resistor pin; connect to VOUT-2 with RFB1-2 for gain=2, leave open for gain=4."
      },
      {
        "number": "38",
        "name": "VOUT-2",
        "type": "output",
        "description": "DAC-2 analog output voltage; output range ±15V bipolar or 0V to +20V unipolar with 16-bit resolution."
      },
      {
        "number": "39",
        "name": "AIN",
        "type": "input",
        "description": "Auxiliary analog input; routed to analog monitor multiplexer (VMON), accepts AVSS-0.3V to AVDD+0.3V."
      },
      {
        "number": "40",
        "name": "UNI/BIP-B",
        "type": "input",
        "description": "Output mode selection for group B (DAC-2, DAC-3); tie to IOVDD for unipolar mode (0V to +20V) or DGND for bipolar mode (±10V)."
      },
      {
        "number": "41",
        "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-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 41 added from the footprint"
        ],
        "pages_sent": 14,
        "cost_usd": 0.2022,
        "at": "2026-10-07T02:19:30"
      },
      "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": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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        "checked": "2026-10-07",
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  }
}