component
AD5421BCPZ-REEL7
Public Made by Adomby adom
Analog Devices Digital To Analog Converters (DAC), LFCSP-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "ad5421bcpz-reel7",
"title": "AD5421BCPZ-REEL7",
"brief": "Analog Devices Digital To Analog Converters (DAC), LFCSP-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"data acquisition",
"ad5421bcpz-reel7",
"factory-2.0.0",
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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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"model_3d_plain": "ad5421bcpz-reel7-etched.glb",
"model_3d_step": "ad5421bcpz-reel7-etched.step",
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"lbr": "ad5421bcpz-reel7.lbr"
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"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": {
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"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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"zmin_mm": 0,
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"file": "ad5421bcpz-reel7-etched.step",
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},
"metadata": {
"specs": {
"Manufacturer": "Analog Devices",
"Package": "LFCSP-32(5x5)",
"Category": "Data Acquisition",
"Pins": "33"
},
"appearance": {
"contacts": {
"quote": "1. THE EXPOSED PADDLE SHOULD BE CONNECTED TO THE SAME POTENTIAL AS THE COM PIN AND TO A COPPER PLANE FOR",
"page": 12,
"doc": "ds.pdf",
"material": "COPPER"
},
"version": 1,
"datasheet_sha256": "76646178e298d83da459e665b4dd169feab0b4838d84518ed7f6079208ed1376"
},
"characteristics": {
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"source": "datasheet",
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{
"name": "Regin to COM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 11,
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{
"name": "REGOUT to COM",
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{
"name": "Digital inputs (RANGE0, RANGE1, RINT/REXT, ALARM_CURRENT_DIRECTION, REG_SEL0-2) to COM",
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"min": -0.3,
"typ": null,
"max": 7,
"conditions": "or DVDD + 0.3 V, whichever is less",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Digital inputs SCLK, SDIN, SYNC, LDAC to COM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
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"typ": null,
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"conditions": "or IODVDD + 0.3 V, whichever is less",
"source_page": 11,
"source": "datasheet"
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{
"name": "Digital outputs SDO, FAULT to COM",
"symbol": "",
"kind": "absolute_maximum",
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{
"name": "REFIN to COM",
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{
"name": "REFOUT1, REFOUT2",
"symbol": "",
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"unit": "V",
"min": -0.3,
"typ": null,
"max": 4.7,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "VLOOP to COM",
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"min": -0.3,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "LOOP− to COM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -5,
"typ": null,
"max": 0.3,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "DVDD to COM",
"symbol": "",
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"min": -0.3,
"typ": null,
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"conditions": "",
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"source": "datasheet"
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{
"name": "IODVDD to COM",
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"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 11,
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},
{
"name": "REXT1, CIN to COM",
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"unit": "V",
"min": -0.3,
"typ": null,
"max": 4.3,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "REXT2 to COM",
"symbol": "",
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"typ": null,
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{
"name": "DRIVE to COM",
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{
"name": "Operating temperature range (TA), industrial",
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"unit": "°C",
"min": -40,
"typ": null,
"max": 105,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Storage temperature range",
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"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Junction temperature (TJ MAX)",
"symbol": "TJ MAX",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "",
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"source": "datasheet"
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{
"name": "Thermal resistance junction-to-ambient, 32-lead LFCSP (CP-32-12)",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 40,
"max": null,
"conditions": "JEDEC 2S2P test board with thermal vias",
"source_page": 11,
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{
"name": "Thermal resistance junction-to-case, 32-lead LFCSP (CP-32-12)",
"symbol": "θJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 7,
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{
"name": "Loop voltage range",
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"min": 5.5,
"typ": null,
"max": 52,
"conditions": "",
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{
"name": "IODVDD digital interface supply",
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{
"name": "Total Unadjusted Error (TUE), internal RSET",
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"min": -0.18,
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{
"name": "Total Unadjusted Error (TUE), internal RSET",
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{
"name": "Relative Accuracy (INL), internal RSET",
"symbol": "",
"kind": "electrical",
"unit": "% FSR",
"min": -0.012,
"typ": 0.006,
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"min": -1,
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"conditions": "Guaranteed monotonic",
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{
"name": "Offset Error",
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{
"name": "Offset Error",
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"unit": "% FSR",
"min": -0.008,
"typ": 0.0008,
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"conditions": "B grade and C grade, TA = 25°C",
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"source": "datasheet"
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{
"name": "Gain Error",
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"kind": "electrical",
"unit": "% FSR",
"min": -0.107,
"typ": null,
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{
"name": "Gain Error",
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"min": -0.035,
"typ": 0.0058,
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"conditions": "B grade and C grade, TA = 25°C",
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{
"name": "Full-Scale Error",
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