ADS8557IPM

{
  "schema_version": 1,
  "type": "component",
  "slug": "ads8557ipm",
  "title": "ADS8557IPM",
  "brief": "Texas Instruments Analog To Digital Converters (ADC), LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data acquisition",
    "ads8557ipm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ADS8557IPM",
    "manufacturer": "Texas Instruments",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ads8558",
    "parts": {
      "symbol": "ads8557ipm.kicad_sym",
      "footprint": "ads8557ipm.kicad_mod",
      "model_3d": "ads8557ipm-hero.glb",
      "model_3d_plain": "ads8557ipm.glb",
      "model_3d_step": "ads8557ipm-etched.step",
      "model_3d_step_plain": "ads8557ipm.step",
      "lbr": "ads8557ipm.lbr"
    },
    "distributor_links": {
      "lcsc": "C2870172",
      "digikey": "296-24973-ND",
      "mouser": "595-ADS8557IPM"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T11:30:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-24973-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-ADS8557IPM",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DB14/REFBUFEN",
        "type": "bidirectional",
        "description": "Data bit 14 input/output, which is '0' for the ADS8557; in hardware mode it is the reference buffers enable input (active low, mandatory when the internal reference is used)."
      },
      {
        "number": "2",
        "name": "DB13/SDI",
        "type": "bidirectional",
        "description": "Data bit 13 input/output, which is the MSB for the ADS8557; connect to BGND in hardware mode and use as the serial data input in software mode."
      },
      {
        "number": "3",
        "name": "DB12",
        "type": "bidirectional",
        "description": "Data bit 12 input/output in parallel mode, with the table specifying connection to BGND."
      },
      {
        "number": "4",
        "name": "DB11",
        "type": "bidirectional",
        "description": "Data bit 11 input/output; it is the MSB output for the ADS8558 and the table specifies connection to BGND."
      },
      {
        "number": "5",
        "name": "DB10/SDO_C",
        "type": "bidirectional",
        "description": "Data bit 10 input/output; when SEL_C = 1 it is the data output for channel C, and when SEL_C = 0 it must be tied to BGND."
      },
      {
        "number": "6",
        "name": "DB9/SDO_B",
        "type": "bidirectional",
        "description": "Data bit 9 input/output; when SEL_B = 1 it is the data output for channel B, and when SEL_B = 0 it must be tied to BGND."
      },
      {
        "number": "7",
        "name": "DB8/SDO_A",
        "type": "bidirectional",
        "description": "Data bit 8 input/output and data output for channel A; it acts as the single data output for all channels when SEL_C = 0 and SEL_B = 0."
      },
      {
        "number": "8",
        "name": "BGND",
        "type": "power_in",
        "description": "Buffer I/O ground, to be connected to the digital ground plane."
      },
      {
        "number": "9",
        "name": "BVDD",
        "type": "power_in",
        "description": "Buffer I/O supply, 2.7 V to 5.5 V, decoupled with a 1-μF ceramic capacitor (or 100-nF plus 10-μF) to BGND."
      },
      {
        "number": "10",
        "name": "DB7/HBEN/DCEN",
        "type": "bidirectional",
        "description": "In word mode it is data bit 7 and the daisy-chain enable (connect to BGND if unused); in byte mode it is the high-byte enable that sets which byte is output first on DB[15:8]."
      },
      {
        "number": "11",
        "name": "DB6/SCLK",
        "type": "bidirectional",
        "description": "In word mode it is data bit 6; in serial mode it is the serial interface clock input, 36 MHz maximum, and in byte mode it is connected to BGND or BVDD."
      },
      {
        "number": "12",
        "name": "DB5/DCIN_A",
        "type": "bidirectional",
        "description": "In word mode it is data bit 5 and, when DCEN = 1, the daisy-chain data input for channel A; otherwise it is connected to BGND."
      },
      {
        "number": "13",
        "name": "DB4/DCIN_B",
        "type": "bidirectional",
        "description": "In word mode it is data bit 4 and, when SEL_B = 1 and DCEN = 1, the daisy-chain data input for channel B; otherwise it is connected to BGND."
      },
      {
        "number": "14",
        "name": "DB3/DCIN_C",
        "type": "bidirectional",
        "description": "In word mode it is data bit 3 and, when SEL_C = 1 and DCEN = 1, the daisy-chain data input for channel C; otherwise it is connected to BGND."
      },
      {
        "number": "15",
        "name": "DB2/SEL_C",
        "type": "bidirectional",
        "description": "In word mode it is data bit 2 and the select input for SDO_C, where SDO_C is active when high and disabled when low."
      },
      {
        "number": "16",
        "name": "DB1/SEL_B",
        "type": "bidirectional",
        "description": "In word mode it is data bit 1 and the select input for SDO_B, where SDO_B is active when high and disabled when low."
      },
      {
        "number": "17",
        "name": "DB0/SEL_A",
        "type": "bidirectional",
        "description": "In word mode it is data bit 0 (LSB) and the select input for SDO_A, which must always be high."
      },
      {
        "number": "18",
        "name": "BUSY/INT",
        "type": "output",
        "description": "Converter busy output (high during conversion, low once all six channel results are latched) or interrupt output when CR bit C21 = 1, with polarity set by CR bit C20."
      },
      {
        "number": "19",
        "name": "CS/FS",
        "type": "input",
        "description": "Chip select input that enables the parallel interface when low; in serial mode it is the frame synchronization input, whose falling edge controls the frame transfer."
      },
      {
        "number": "20",
        "name": "RD",
        "type": "input",
        "description": "Read data input that enables the parallel data output when low; the table specifies connection to BGND."
      },
      {
        "number": "21",
        "name": "CONVST_C",
        "type": "input",
        "description": "Hardware mode conversion start for channel pair C, where the rising edge starts simultaneous conversion of CH_C[1:0] and the signal must stay high during conversion or both ADCs of channel C enter partial power-down."
      },
      {
        "number": "22",
        "name": "CONVST_B",
        "type": "input",
        "description": "Hardware mode conversion start for channel pair B, where the rising edge starts simultaneous conversion of CH_B[1:0] and the signal must stay high during conversion or both ADCs of channel B enter partial power-down."
      },
      {
        "number": "23",
        "name": "CONVST_A",
        "type": "input",
        "description": "Hardware mode conversion start for channel pair A, where the rising edge starts simultaneous conversion of CH_A[1:0] and the signal must stay high during conversion or both ADCs of channel A enter partial power-down."
      },
      {
        "number": "24",
        "name": "STBY",
        "type": "input",
        "description": "Standby mode input; when low the entire device is powered down including the internal clock and reference, and when high it operates in normal mode."
      },
      {
        "number": "25",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane; this pin may have a dedicated ground only if its potential stays within ±300 mV of AGND."
      },
      {
        "number": "26",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled with 100-nF to AGND plus a 10-μF capacitor; this pin may have a dedicated supply only if kept within ±300 mV of AVDD."
      },
      {
        "number": "27",
        "name": "RANGE/XCLK",
        "type": "bidirectional",
        "description": "In hardware mode it selects the input range (low = ±4 VREF, high = ±2 VREF); in software mode it is the external conversion clock input (CLKSEL) or internal conversion clock output (CLKOUT_EN), and connects to BVDD or BGND if unused."
      },
      {
        "number": "28",
        "name": "RESET",
        "type": "input",
        "description": "Active-high reset that aborts ongoing conversions and resets the control register to 0x000003FF, with a pulse of at least 50 ns required."
      },
      {
        "number": "29",
        "name": "WORD/BYTE",
        "type": "input",
        "description": "Output mode select, where low selects word mode on DB[15:0] and high selects byte mode on DB[15:8] requiring two accesses per 16-bit transfer; the table specifies connection to BGND."
      },
      {
        "number": "30",
        "name": "HVSS",
        "type": "power_in",
        "description": "Negative supply for the analog inputs, -16.5 V to -5 V, decoupled with 100-nF and 10-μF to AGND."
      },
      {
        "number": "31",
        "name": "HVDD",
        "type": "power_in",
        "description": "Positive supply for the analog inputs, 5 V to 16.5 V, decoupled with 100-nF and 10-μF to AGND."
      },
      {
        "number": "32",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "33",
        "name": "CH_A0",
        "type": "passive",
        "description": "Analog input of channel A0, with input range set by the RANGE pin in hardware mode or CR bit C26 (RANGE_A) in software mode."
      },
      {
        "number": "34",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "35",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "36",
        "name": "CH_A1",
        "type": "passive",
        "description": "Analog input of channel A1, with input range set by the RANGE pin in hardware mode or CR bit C26 (RANGE_A) in software mode."
      },
      {
        "number": "37",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "38",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "39",
        "name": "CH_B0",
        "type": "passive",
        "description": "Analog input of channel B0, with input range set by the RANGE pin in hardware mode or CR bit C27 (RANGE_B) in software mode."
      },
      {
        "number": "40",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "41",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "42",
        "name": "CH_B1",
        "type": "passive",
        "description": "Analog input of channel B1, with input range set by the RANGE pin in hardware mode or CR bit C27 (RANGE_B) in software mode."
      },
      {
        "number": "43",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "44",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "45",
        "name": "CH_C0",
        "type": "passive",
        "description": "Analog input of channel C0, with input range set by the RANGE pin in hardware mode or CR bit C28 (RANGE_C) in software mode."
      },
      {
        "number": "46",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "47",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "48",
        "name": "CH_C1",
        "type": "passive",
        "description": "Analog input of channel C1, with input range set by the RANGE pin in hardware mode or CR bit C28 (RANGE_C) in software mode."
      },
      {
        "number": "49",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "50",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "51",
        "name": "REFIO",
        "type": "bidirectional",
        "description": "Reference input/output, 0.5 V to 3.025 V, enabled via REFEN/WR or CR bit C25, with a 470-nF ceramic decoupling capacitor to pin 52."
      },
      {
        "number": "52",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane and used as the return for the REFIO decoupling capacitor."
      },
      {
        "number": "53",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane and used as the return for the REFC_A decoupling capacitor."
      },
      {
        "number": "54",
        "name": "REFC_A",
        "type": "passive",
        "description": "Decoupling capacitor node for the channel A reference, requiring a 10-μF ceramic capacitor to pin 53."
      },
      {
        "number": "55",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane and used as the return for the REFC_B decoupling capacitor."
      },
      {
        "number": "56",
        "name": "REFC_B",
        "type": "passive",
        "description": "Decoupling capacitor node for the channel B reference, requiring a 10-μF ceramic capacitor to pin 55."
      },
      {
        "number": "57",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane and used as the return for the REFC_C decoupling capacitor."
      },
      {
        "number": "58",
        "name": "REFC_C",
        "type": "passive",
        "description": "Decoupling capacitor node for the channel C reference, requiring a 10-μF ceramic capacitor to pin 57."
      },
      {
        "number": "59",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground to be connected to the analog ground plane."
      },
      {
        "number": "60",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, 4.5 V to 5.5 V, decoupled to AGND as specified for the AVDD pins."
      },
      {
        "number": "61",
        "name": "PAR/SER",
        "type": "input",
        "description": "Interface mode select, where low selects the parallel interface and high enables the serial interface."
      },
      {
        "number": "62",
        "name": "HW/SW",
        "type": "input",
        "description": "Mode select, where low selects hardware mode controlled by external pins and high selects software mode configured through the control register."
      },
      {
        "number": "63",
        "name": "REFEN/WR",
        "type": "input",
        "description": "In hardware mode it is the internal reference enable (high enables the internal reference, low requires an external reference at REFIO); in software mode it is the parallel write input (active with CS low) or is tied to BGND/BVDD in serial mode."
      },
      {
        "number": "64",
        "name": "DB15",
        "type": "bidirectional",
        "description": "Data bit 15 (MSB) input/output, which is '0' for the ADS8557 and should be connected to BGND."
      }
    ],
    "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: Package match: the datasheet covers the ADS8556/ADS8557/ADS8558 family in a 64-pin LQFP (PM) package; Multi-function pins: names combine parallel, serial, hardware-mode and software-mode functions (PAR/; ADS8557-specific behavior: DB14 and DB15 read '0' on the ADS8557, DB13 is the MSB output on the ADS8"
        ],
        "pages_sent": 14,
        "cost_usd": 0.1417,
        "at": "2026-10-11T11:29:43"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ads8558",
        "pages": 50,
        "sha256": "40692bd4ec54d669",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ads8557ipm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12,
          12,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b0c827bc5c05552175d28affe44a5bd2ab45c9c36efff6ff07a74cc449b13db4",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads8557ipm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12,
          12,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b8a9faa230223c203c4fcf6b6031c92378312ceb926c801bf3ab9d2d70325269",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "LQFP-64(10x10)",
      "Category": "Data Acquisition",
      "Pins": "64"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ads8557ipm"
  ],
  "discovery_pitch": "ADS8557IPM (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ads8557ipm.kicad_sym",
    "ads8557ipm.kicad_mod",
    "ads8557ipm.glb",
    "ads8557ipm.step",
    "ads8557ipm.lbr",
    "docs/hero.png",
    "docs/ads8557ipm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ads8557ipm-hero.glb",
    "ads8557ipm-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}