component
AD8232ACPZ-R7
Public Made by Adomby adom
Analog Devices Analog To Digital Converters (ADC), LFCSP-20(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"description": "Analog Devices Analog To Digital Converters (ADC), LFCSP-20(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "AD8232ACPZ-R7",
"manufacturer": "Analog Devices",
"package": "LFCSP-20(4x4)",
"pin_count": 21,
"category": "Data Acquisition",
"subcategory": "Analog To Digital Converters (ADC)",
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"digikey": "505-AD8232ACPZ-R7TR-ND"
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"source": "Component Ocean /api/assign-pns",
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"pn": "505-AD8232ACPZ-R7TR-ND",
"status": "found"
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"pins": [
{
"number": "1",
"name": "HPDRIVE",
"type": "output",
"description": "High-pass driver output that connects to the capacitor of the first high-pass filter, driven by the AD8232 to keep HPSENSE at the reference voltage."
},
{
"number": "2",
"name": "+IN",
"type": "input",
"description": "Instrumentation amplifier positive input, typically connected to the left arm (LA) electrode."
},
{
"number": "3",
"name": "-IN",
"type": "input",
"description": "Instrumentation amplifier negative input, typically connected to the right arm (RA) electrode."
},
{
"number": "4",
"name": "RLDFB",
"type": "input",
"description": "Right leg drive feedback input, the feedback terminal for the right leg drive circuit."
},
{
"number": "5",
"name": "RLD",
"type": "output",
"description": "Right leg drive output, to which the driven electrode (typically the right leg) is connected."
},
{
"number": "6",
"name": "SW",
"type": "passive",
"description": "Fast restore switch terminal, connected to the output of the second high-pass filter."
},
{
"number": "7",
"name": "OPAMP+",
"type": "input",
"description": "Operational amplifier noninverting input."
},
{
"number": "8",
"name": "REFOUT",
"type": "output",
"description": "Reference buffer output that serves as the signal reference (virtual ground) for the instrumentation amplifier output and any circuit point needing a reference."
},
{
"number": "9",
"name": "OPAMP-",
"type": "input",
"description": "Operational amplifier inverting input."
},
{
"number": "10",
"name": "OUT",
"type": "output",
"description": "Operational amplifier output carrying the fully conditioned heart rate signal, which can drive an ADC input."
},
{
"number": "11",
"name": "LOD-",
"type": "output",
"description": "Leads off comparator output: in dc leads off mode it is high when the -IN electrode is disconnected and low when connected, and in ac leads off mode it is always low."
},
{
"number": "12",
"name": "LOD+",
"type": "output",
"description": "Leads off comparator output: in dc leads off mode it is high when the +IN electrode is disconnected, and in ac leads off mode it is high when either -IN or +IN is disconnected and low only when both are connected."
},
{
"number": "13",
"name": "SDN",
"type": "input",
"description": "Shutdown control input; driving SDN low enters the low power shutdown mode."
},
{
"number": "14",
"name": "AC/DC",
"type": "input",
"description": "Leads off mode control input; low selects dc leads off mode and high selects ac leads off mode."
},
{
"number": "15",
"name": "FR",
"type": "input",
"description": "Fast restore control input; high enables fast recovery mode, otherwise drive low."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Power supply ground."
},
{
"number": "17",
"name": "+VS",
"type": "power_in",
"description": "Power supply terminal; single-supply operation from 2.0 V to 3.5 V per the features list."
},
{
"number": "18",
"name": "REFIN",
"type": "input",
"description": "Reference buffer input, a high impedance terminal used to set the level of the reference buffer."
},
{
"number": "19",
"name": "IAOUT",
"type": "output",
"description": "Instrumentation amplifier output terminal."
},
{
"number": "20",
"name": "HPSENSE",
"type": "input",
"description": "High-pass sense input for the instrumentation amplifier, connected to the junction of the R and C that sets the dc blocking corner frequency."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
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"primary_model": "claude-haiku-5-5",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pin types for SW and EP are not stated in the datasheet; SW is set to passive as a switch terminal a; Pin 1 is labeled HPDRIVE and EP is the exposed pad, which is not a numbered 1..N pin; it is included; The datasheet's Ordering Guide lists AD8232ACPZ-R7 in the 20-Lead LFCSP_WQ, CP-20-10 package, which ",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint"
],
"pages_sent": 9,
"cost_usd": 0.0555,
"at": "2026-10-17T21:15:17"
},
"datasheet": {
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"pages": 28,
"sha256": "7c205ac952614a6f",
"source_tier": "lcsc"
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"cad": "KiCad official (CC-BY-SA 4.0)",
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