AD7656A-1BSTZ

{
  "slug": "ad7656a-1bstz",
  "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",
    "ad7656a-1bstz",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "AD7656A-1BSTZ",
    "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-1.pdf",
    "parts": {
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      "lbr": "ad7656a-1bstz.lbr"
    },
    "distributor_links": {
      "lcsc": "C651332",
      "digikey": "505-AD7656A-1BSTZ-ND",
      "mouser": "584-AD7656A-1BSTZ"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T15:51:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-AD7656A-1BSTZ-ND",
        "status": "found"
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      "mouser": {
        "pn": "584-AD7656A-1BSTZ",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DB14/REFBUFEN/DIS",
        "type": "bidirectional",
        "description": "Data Bit 14 and Reference Buffer Enable/Disable; when SER/PAR/SEL = 0 it acts as a three-state digital input/output pin."
      },
      {
        "number": "2",
        "name": "DB13",
        "type": "bidirectional",
        "description": "Data Bit 13; in parallel mode it is a three-state I/O used for the conversion result and control register writes, and must be tied to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "3",
        "name": "DB12",
        "type": "bidirectional",
        "description": "Data Bit 12; in parallel mode it is a three-state I/O used for the conversion result and control register writes, and must be tied to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "4",
        "name": "DB11",
        "type": "bidirectional",
        "description": "Data Bit 11; a three-state parallel digital output in parallel mode, and must be tied to DGND when SER/PAR/SEL = 1."
      },
      {
        "number": "5",
        "name": "DB10/DOUT C",
        "type": "bidirectional",
        "description": "Data Bit 10 in parallel mode; 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 in parallel mode; 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 in parallel mode; 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 power supply input that sets the interface operating voltage, specified at 2.7 V to 5.25 V."
      },
      {
        "number": "10",
        "name": "DB7/HBEN/DCEN",
        "type": "bidirectional",
        "description": "Data Bit 7 in word mode, HBEN in byte mode, and DCEN in serial mode; tie to DGND in serial mode when daisy-chain is not used."
      },
      {
        "number": "11",
        "name": "DB6/SCLK",
        "type": "bidirectional",
        "description": "Data Bit 6 in parallel mode; serial read clock input SCLK when SER/PAR/SEL = 1."
      },
      {
        "number": "12",
        "name": "DB5/DCIN A",
        "type": "bidirectional",
        "description": "Data Bit 5 in parallel mode; Daisy-Chain Input A when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND in serial mode."
      },
      {
        "number": "13",
        "name": "DB4/DCIN B",
        "type": "bidirectional",
        "description": "Data Bit 4 in parallel mode; Daisy-Chain Input B when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND in serial mode."
      },
      {
        "number": "14",
        "name": "DB3/DCIN C",
        "type": "bidirectional",
        "description": "Data Bit 3 in parallel mode; Daisy-Chain Input C when SER/PAR/SEL = 1 and DCEN = 1, otherwise tie to DGND in serial mode."
      },
      {
        "number": "15",
        "name": "DB2/SEL C",
        "type": "bidirectional",
        "description": "Data Bit 2 in parallel mode; SEL C serial configuration input, where 1 enables DOUT C and unused DOUT pins are left unconnected."
      },
      {
        "number": "16",
        "name": "DB1/SEL B",
        "type": "bidirectional",
        "description": "Data Bit 1 in parallel mode; SEL B serial configuration input, where 1 enables DOUT B and unused DOUT pins are left unconnected."
      },
      {
        "number": "17",
        "name": "DB0/SEL A",
        "type": "bidirectional",
        "description": "Data Bit 0 in parallel mode; SEL A serial configuration input, which must always be set to 1 when the serial interface is selected."
      },
      {
        "number": "18",
        "name": "BUSY",
        "type": "output",
        "description": "Busy output that goes high when a conversion starts and stays high until conversion data is latched; CONVST edges are ignored while BUSY is high."
      },
      {
        "number": "19",
        "name": "CS",
        "type": "input",
        "description": "Active-low chip select that frames parallel reads and writes or the serial read transfer."
      },
      {
        "number": "20",
        "name": "RD",
        "type": "input",
        "description": "Active-low read strobe for parallel reads; must be held low when the serial interface is selected."
      },
      {
        "number": "21",
        "name": "CONVST C",
        "type": "input",
        "description": "Conversion start input that initiates simultaneous conversions on V5 and V6 on its rising edge."
      },
      {
        "number": "22",
        "name": "CONVST B",
        "type": "input",
        "description": "Conversion start input that initiates simultaneous conversions on V3 and V4 on its rising edge."
      },
      {
        "number": "23",
        "name": "CONVST A",
        "type": "input",
        "description": "Conversion start input that initiates simultaneous conversions on V1 and V2 on its rising edge."
      },
      {
        "number": "24",
        "name": "STBY",
        "type": "input",
        "description": "Standby mode input that is high for normal operation and low to put all six ADCs into standby."
      },
      {
        "number": "25",
        "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": "26",
        "name": "DVCC",
        "type": "power_in",
        "description": "Digital power supply specified at 4.75 V to 5.25 V, to be kept within 0.3 V of AVCC and decoupled to DGND with 1 µF."
      },
      {
        "number": "27",
        "name": "RANGE",
        "type": "input",
        "description": "Analog input range select sampled at the falling edge of BUSY: logic 1 selects ±2 × VREF and logic 0 selects ±4 × VREF in hardware mode."
      },
      {
        "number": "28",
        "name": "RESET",
        "type": "input",
        "description": "Reset input where a high pulse, typically 100 ns wide, resets the device and should be applied once after power-up."
      },
      {
        "number": "29",
        "name": "W/B",
        "type": "input",
        "description": "Word/Byte input where logic low selects 16-bit word transfers on DB15 to DB0 and logic high selects byte mode; tie to DGND for serial mode."
      },
      {
        "number": "30",
        "name": "VSS",
        "type": "power_in",
        "description": "Negative analog supply for the analog input section, specified at −6 V to −16.5 V."
      },
      {
        "number": "31",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive analog supply for the analog input section, specified at 6 V to 16.5 V."
      },
      {
        "number": "32",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "33",
        "name": "V1",
        "type": "input",
        "description": "Single-ended analog input 1 with range set by the RANGE pin in hardware mode or by the RNGA bit in software mode."
      },
      {
        "number": "34",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "35",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "36",
        "name": "V2",
        "type": "input",
        "description": "Single-ended analog input 2 with range set by the RANGE pin in hardware mode or by the RNGA bit in software mode."
      },
      {
        "number": "37",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "38",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "39",
        "name": "V3",
        "type": "input",
        "description": "Single-ended analog input 3 with range set by the RANGE pin in hardware mode or by the RNGB bit in software mode."
      },
      {
        "number": "40",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "41",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "42",
        "name": "V4",
        "type": "input",
        "description": "Single-ended analog input 4 with range set by the RANGE pin in hardware mode or by the RNGB bit in software mode."
      },
      {
        "number": "43",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "44",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "45",
        "name": "V5",
        "type": "input",
        "description": "Single-ended analog input 5 with range set by the RANGE pin in hardware mode or by the RNGC bit in software mode."
      },
      {
        "number": "46",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "47",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "48",
        "name": "V6",
        "type": "input",
        "description": "Single-ended analog input 6 with range set by the RANGE pin in hardware mode or by the RNGC bit in software mode."
      },
      {
        "number": "49",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "50",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "51",
        "name": "REFIN/REFOUT",
        "type": "bidirectional",
        "description": "Reference input or output; the on-chip reference is available here, and when it is enabled the pin needs at least a 1 µF decoupling capacitor."
      },
      {
        "number": "52",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "53",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "54",
        "name": "REFCAPA",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair A, to be decoupled to AGND with a 1 µF capacitor."
      },
      {
        "number": "55",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "56",
        "name": "REFCAPB",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair B, to be decoupled to AGND with a 1 µF capacitor."
      },
      {
        "number": "57",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "58",
        "name": "REFCAPC",
        "type": "passive",
        "description": "Reference buffer decoupling pin for ADC pair C, to be decoupled to AGND with a 1 µF capacitor."
      },
      {
        "number": "59",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for all analog circuitry; connect to the system AGND plane and keep within 0.3 V of DGND."
      },
      {
        "number": "60",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply for the ADC cores, specified at 4.75 V to 5.25 V and kept within 0.3 V of DVCC."
      },
      {
        "number": "61",
        "name": "SER/PAR SEL",
        "type": "input",
        "description": "Serial/parallel selection input where 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 input where logic 0 selects CONVST-controlled hardware mode and logic 1 selects control-register software mode."
      },
      {
        "number": "63",
        "name": "WR/REFEN/DIS",
        "type": "input",
        "description": "Write strobe in software mode with CS, and reference enable/disable in hardware mode where logic 1 enables the internal reference."
      },
      {
        "number": "64",
        "name": "DB15",
        "type": "bidirectional",
        "description": "Data Bit 15; in parallel mode it is a three-state I/O used for the conversion result and control register writes, and must be tied to DGND when SER/PAR/SEL = 1."
      }
    ],
    "provenance": {
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        "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: Pin Configuration figure text on page 7 is garbled; pin numbers and names were taken from the Table "
        ],
        "pages_sent": 13,
        "cost_usd": 0.0536,
        "at": "2026-10-28T15:50:55"
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        "pages": 28,
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