AD7656ABSTZ

{
  "slug": "ad7656abstz",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Analog To Digital Converters (ADCs), LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "data converters",
    "ad7656abstz",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "AD7656ABSTZ",
    "manufacturer": "Analog Devices",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Data Converters",
    "subcategory": "Analog To Digital Converters (ADCs)",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/AD7656A.pdf",
    "parts": {
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      "lbr": "ad7656abstz.lbr"
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    "distributor_links": {
      "lcsc": "C651334",
      "digikey": "505-AD7656ABSTZ-ND",
      "mouser": "584-AD7656ABSTZ"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T15:51:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-AD7656ABSTZ-ND",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "DB14/REFBUFEN/DIS",
        "type": "bidirectional",
        "description": "Data Bit 14 in parallel mode, and Reference Buffer Enable/Disable; acts as a three-state digital input/output when SER/PAR/SEL = 0."
      },
      {
        "number": "2",
        "name": "DB13",
        "type": "bidirectional",
        "description": "Data Bit 13 three-state parallel I/O when SER/PAR/SEL = 0; tie to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "3",
        "name": "DB12",
        "type": "bidirectional",
        "description": "Data Bit 12 three-state parallel I/O when SER/PAR/SEL = 0; tie to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "4",
        "name": "DB11",
        "type": "bidirectional",
        "description": "Data Bit 11 three-state parallel output when SER/PAR/SEL = 0; tie to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "5",
        "name": "DB10/DOUT C",
        "type": "bidirectional",
        "description": "Data Bit 10 parallel output when SER/PAR/SEL = 0; serial data output C when SER/PAR/SEL = 1 and SEL C = 1."
      },
      {
        "number": "6",
        "name": "DB9/DOUT B",
        "type": "bidirectional",
        "description": "Data Bit 9 parallel output when SER/PAR/SEL = 0; serial data output B when SER/PAR/SEL = 1 and SEL B = 1."
      },
      {
        "number": "7",
        "name": "DB8/DOUT A",
        "type": "bidirectional",
        "description": "Data Bit 8 parallel output when SER/PAR/SEL = 0; serial data output A when SER/PAR/SEL = 1 and SEL A = 1."
      },
      {
        "number": "8",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground reference for all digital circuitry; must not differ from AGND by more than 0.3 V, even transiently."
      },
      {
        "number": "9",
        "name": "VDRIVE",
        "type": "power_in",
        "description": "Logic supply input that sets the interface voltage, specified at 2.7 V to 5.25 V; decouple with 10 µF and 100 nF."
      },
      {
        "number": "10",
        "name": "DB7/HBEN/DCEN",
        "type": "bidirectional",
        "description": "Data Bit 7 in word mode, HBEN in byte mode, and DCEN daisy-chain enable in serial mode; tie DCEN to DGND when not daisy-chaining."
      },
      {
        "number": "11",
        "name": "DB6/SCLK",
        "type": "input",
        "description": "Data Bit 6 three-state output when SER/PAR/SEL = 0; serial read clock input SCLK (maximum 18 MHz) when SER/PAR/SEL = 1."
      },
      {
        "number": "12",
        "name": "DB5/DCIN A",
        "type": "bidirectional",
        "description": "Data Bit 5 parallel output when SER/PAR/SEL = 0; Daisy-Chain Input A when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND."
      },
      {
        "number": "13",
        "name": "DB4/DCIN B",
        "type": "bidirectional",
        "description": "Data Bit 4 parallel output when SER/PAR/SEL = 0; Daisy-Chain Input B when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND."
      },
      {
        "number": "14",
        "name": "DB3/DCIN C",
        "type": "bidirectional",
        "description": "Data Bit 3 parallel output when SER/PAR/SEL = 0; Daisy-Chain Input C when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND."
      },
      {
        "number": "15",
        "name": "DB2/SEL C",
        "type": "bidirectional",
        "description": "Data Bit 2 parallel output when SER/PAR/SEL = 0; SEL C serial configuration input when SER/PAR/SEL = 1 (1 enables DOUT C)."
      },
      {
        "number": "16",
        "name": "DB1/SEL B",
        "type": "bidirectional",
        "description": "Data Bit 1 parallel output when SER/PAR/SEL = 0; SEL B serial configuration input when SER/PAR/SEL = 1 (1 enables DOUT B)."
      },
      {
        "number": "17",
        "name": "DB0/SEL A",
        "type": "bidirectional",
        "description": "Data Bit 0 parallel output when SER/PAR/SEL = 0; SEL A serial configuration input that must be 1 in serial mode."
      },
      {
        "number": "18",
        "name": "BUSY",
        "type": "output",
        "description": "Goes high when a conversion starts and stays high until the data is latched; do not start a new conversion while BUSY is high."
      },
      {
        "number": "19",
        "name": "CS",
        "type": "input",
        "description": "Active-low chip select that frames parallel reads/writes and serial reads; output bus is enabled when CS and RD are low."
      },
      {
        "number": "20",
        "name": "RD",
        "type": "input",
        "description": "Active-low read strobe that enables the parallel output bus with CS low; hold low in serial mode."
      },
      {
        "number": "21",
        "name": "CONVST C",
        "type": "input",
        "description": "Conversion start input for simultaneous sampling of V5 and V6; a low-to-high edge starts the conversion."
      },
      {
        "number": "22",
        "name": "CONVST B",
        "type": "input",
        "description": "Conversion start input for simultaneous sampling of V3 and V4; a low-to-high edge starts the conversion."
      },
      {
        "number": "23",
        "name": "CONVST A",
        "type": "input",
        "description": "Conversion start input for simultaneous sampling of V1 and V2; a low-to-high edge starts the conversion."
      },
      {
        "number": "24",
        "name": "STBY",
        "type": "input",
        "description": "Standby input for all six ADCs; high for normal operation and low for standby."
      },
      {
        "number": "25",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground reference; connect together with pin 8 to the system DGND plane."
      },
      {
        "number": "26",
        "name": "DVCC",
        "type": "power_in",
        "description": "Digital power supply specified at 4.75 V to 5.25 V; keep within 0.3 V of AVCC and decouple with 10 µF and 100 nF."
      },
      {
        "number": "27",
        "name": "RANGE",
        "type": "input",
        "description": "Input range select: logic 1 selects ±2 × VREF and logic 0 selects ±4 × VREF, sampled at the falling edge of BUSY in hardware mode."
      },
      {
        "number": "28",
        "name": "RESET",
        "type": "input",
        "description": "Active-high reset that aborts any conversion and clears the internal register; a RESET pulse is required after power-up."
      },
      {
        "number": "29",
        "name": "W/B",
        "type": "input",
        "description": "Word/byte select: logic low for 16-bit parallel word mode and logic high for byte mode; tie to DGND in serial mode."
      },
      {
        "number": "30",
        "name": "VSS",
        "type": "power_in",
        "description": "Negative analog supply, specified from −6 V to −16.5 V; decouple with 10 µF and 100 nF."
      },
      {
        "number": "31",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive analog supply, specified from 6 V to 16.5 V; decouple with 10 µF and 100 nF."
      },
      {
        "number": "32",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect all AGND pins to the system AGND plane."
      },
      {
        "number": "33",
        "name": "V1",
        "type": "input",
        "description": "Single-ended bipolar analog input 1, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "34",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "35",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "36",
        "name": "V2",
        "type": "input",
        "description": "Single-ended bipolar analog input 2, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "37",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "38",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "39",
        "name": "V3",
        "type": "input",
        "description": "Single-ended bipolar analog input 3, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "40",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "41",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "42",
        "name": "V4",
        "type": "input",
        "description": "Single-ended bipolar analog input 4, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "43",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "44",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "45",
        "name": "V5",
        "type": "input",
        "description": "Single-ended bipolar analog input 5, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "46",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "47",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "48",
        "name": "V6",
        "type": "input",
        "description": "Single-ended bipolar analog input 6, with range set by the RANGE pin or the RNGC-RNGA control bits."
      },
      {
        "number": "49",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "50",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "51",
        "name": "REFIN/REFOUT",
        "type": "passive",
        "description": "On-chip reference output for external use, or external reference input when the internal reference is disabled; decouple with at least 10 µF when enabled."
      },
      {
        "number": "52",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "53",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "54",
        "name": "REFCAPA",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair A; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "55",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "56",
        "name": "REFCAPB",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair B; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "57",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "58",
        "name": "REFCAPC",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair C; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "59",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane."
      },
      {
        "number": "60",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V; decouple to AGND with 10 µF and 100 nF."
      },
      {
        "number": "61",
        "name": "SER/PAR/SEL",
        "type": "input",
        "description": "Serial/parallel select: logic low selects the parallel interface and logic high selects the serial interface."
      },
      {
        "number": "62",
        "name": "H/S SEL",
        "type": "input",
        "description": "Hardware/software select: logic 0 selects hardware mode with CONVST x choosing ADC pairs, and logic 1 selects software control-register mode."
      },
      {
        "number": "63",
        "name": "WR/REFEN/DIS",
        "type": "input",
        "description": "Write strobe for control-register writes in software mode, or reference enable/disable when H/S SEL = 0."
      },
      {
        "number": "64",
        "name": "DB15",
        "type": "bidirectional",
        "description": "Data Bit 15 three-state parallel I/O when SER/PAR/SEL = 0; tie to DGND when SER/PAR/SEL = 1."
      }
    ],
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "at": "2026-10-28T15:50:51"
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