AD5421BCPZ-REEL7

{
  "slug": "ad5421bcpz-reel7",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Digital To Analog Converters (DAC), LFCSP-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "ad5421bcpz-reel7",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "ad5421bcpz-reel7.step",
    "ad5421bcpz-reel7.lbr",
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  "component": {
    "mpn": "AD5421BCPZ-REEL7",
    "manufacturer": "Analog Devices",
    "package": "LFCSP-32(5x5)",
    "pin_count": 33,
    "category": "Data Acquisition",
    "subcategory": "Digital To Analog Converters (DAC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589802425956929536",
    "parts": {
      "symbol": "ad5421bcpz-reel7.kicad_sym",
      "footprint": "ad5421bcpz-reel7.kicad_mod",
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      "lbr": "ad5421bcpz-reel7.lbr"
    },
    "distributor_links": {
      "lcsc": "C649726"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:33:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SDIN",
        "type": "input",
        "description": "Serial data input; data must be valid on the falling edge of SCLK."
      },
      {
        "number": "2",
        "name": "LDAC",
        "type": "input",
        "description": "Active-low load DAC input that updates the DAC register and output current; it should not be left unconnected."
      },
      {
        "number": "3",
        "name": "FAULT",
        "type": "output",
        "description": "Active-high fault alert output, asserted on loop current out of range, insufficient loop voltage, overtemperature, SPI control loss or communication (PEC) error."
      },
      {
        "number": "4",
        "name": "COM",
        "type": "power_in",
        "description": "Ground reference pin for the AD5421; a 4.7 V Zener diode is recommended between LOOP− and COM."
      },
      {
        "number": "5",
        "name": "DVDD",
        "type": "power_out",
        "description": "3.3 V digital power supply output, to be decoupled to COM with 100 nF and 4.7 μF capacitors."
      },
      {
        "number": "6",
        "name": "ALARM_CURRENT_DIRECTION",
        "type": "input",
        "description": "Selects upscale alarm current (22.8 mA/24 mA) when connected to DVDD or downscale alarm current (3.2 mA) when connected to COM."
      },
      {
        "number": "7",
        "name": "RINT/REXT",
        "type": "input",
        "description": "Connect to DVDD to select the internal current setting resistor or to COM to select the external resistor between REXT1 and REXT2."
      },
      {
        "number": "8",
        "name": "RANGE0",
        "type": "input",
        "description": "Digital input that selects the loop current range together with RANGE1."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; do not connect to this pin."
      },
      {
        "number": "10",
        "name": "RANGE1",
        "type": "input",
        "description": "Digital input that selects the loop current range together with RANGE0."
      },
      {
        "number": "11",
        "name": "COM",
        "type": "power_in",
        "description": "Ground reference pin for the AD5421; a 4.7 V Zener diode is recommended between LOOP− and COM."
      },
      {
        "number": "12",
        "name": "COM",
        "type": "power_in",
        "description": "Ground reference pin for the AD5421; a 4.7 V Zener diode is recommended between LOOP− and COM."
      },
      {
        "number": "13",
        "name": "REG_SEL2",
        "type": "input",
        "description": "Together with REG_SEL0 and REG_SEL1, selects the REGOUT voltage between 1.8 V and 12 V."
      },
      {
        "number": "14",
        "name": "REG_SEL1",
        "type": "input",
        "description": "Together with REG_SEL0 and REG_SEL2, selects the REGOUT voltage between 1.8 V and 12 V."
      },
      {
        "number": "15",
        "name": "REG_SEL0",
        "type": "input",
        "description": "Together with REG_SEL1 and REG_SEL2, selects the REGOUT voltage between 1.8 V and 12 V."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; do not connect to this pin."
      },
      {
        "number": "17",
        "name": "REFIN",
        "type": "input",
        "description": "Reference voltage input; VREFIN = 2.5 V for specified performance."
      },
      {
        "number": "18",
        "name": "REFOUT2",
        "type": "power_out",
        "description": "Internal 1.22 V reference output; a 100 nF capacitor to COM is recommended."
      },
      {
        "number": "19",
        "name": "REFOUT1",
        "type": "power_out",
        "description": "Internal 2.5 V reference output; a 100 nF capacitor to COM is recommended."
      },
      {
        "number": "20",
        "name": "CIN",
        "type": "passive",
        "description": "External capacitor to COM sets the output slew rate control and also serves as the HART FSK input through a capacitor."
      },
      {
        "number": "21",
        "name": "REXT1",
        "type": "passive",
        "description": "Connection for the external current setting resistor; a precision 24 kΩ resistor can be connected between REXT1 and REXT2."
      },
      {
        "number": "22",
        "name": "REXT2",
        "type": "passive",
        "description": "Connection for the external current setting resistor; a precision 24 kΩ resistor can be connected between REXT1 and REXT2."
      },
      {
        "number": "23",
        "name": "LOOP−",
        "type": "passive",
        "description": "Loop current return pin, used with COM to sense the loop current across the internal 52 Ω resistor; the voltage at LOOP− is negative with respect to COM."
      },
      {
        "number": "24",
        "name": "VLOOP",
        "type": "input",
        "description": "Voltage input with a range of 0 V to 2.5 V, digitized to eight bits for the fault register and intended for loop supply monitoring via a 20:1 divider."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; do not connect to this pin."
      },
      {
        "number": "26",
        "name": "DRIVE",
        "type": "output",
        "description": "Gate connection for an external depletion mode MOSFET; DRIVE to COM is rated −0.3 V to +11 V."
      },
      {
        "number": "27",
        "name": "REGIN",
        "type": "power_in",
        "description": "Voltage regulator input, rated 5.5 V to 52 V with respect to LOOP−, which may be connected directly to the loop voltage or to an external pass transistor."
      },
      {
        "number": "28",
        "name": "REGOUT",
        "type": "power_out",
        "description": "Voltage regulator output selectable from 1.8 V to 12 V via REG_SEL0-REG_SEL2, decoupled to COM with a >1 µF capacitor when driving a microconverter supply."
      },
      {
        "number": "29",
        "name": "IODVDD",
        "type": "power_in",
        "description": "Digital interface supply; digital thresholds are referenced to it and it accepts 1.71 V to 5.5 V with respect to COM."
      },
      {
        "number": "30",
        "name": "SDO",
        "type": "output",
        "description": "Serial data output clocked out on the rising edge of SCLK and valid on the falling edge of SCLK."
      },
      {
        "number": "31",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input, data clocked in on the falling edge, operating at clock speeds up to 30 MHz."
      },
      {
        "number": "32",
        "name": "SYNC",
        "type": "input",
        "description": "Active-low frame synchronization input; data is transferred on SCLK falling edges while low and latched on the rising edge of SYNC."
      },
      {
        "number": "33",
        "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: Table 8 lists the LFCSP pin number for VLOOP as 23, the same as LOOP−, which would duplicate pin 23.; The exposed paddle is not given a numbered pin in the LFCSP pinout; it should be connected to COM an; COM appears on three LFCSP pins (4, 11, 12) per Table 8 and Figure 6; all three are listed as separa",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 14,
        "cost_usd": 0.1159,
        "at": "2026-10-18T17:33:03"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589802425956929536",
        "pages": 36,
        "sha256": "76646178e298d83d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "checked": "2026-10-18",
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  }
}