ADS7828

{
  "schema_version": 1,
  "type": "component",
  "slug": "ads7828",
  "title": "ADS7828",
  "brief": "TI 12-bit, 8-channel, I2C SAR ADC, TSSOP-16. Internal 2.5 V reference, up to 50 kSPS. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data-converter",
    "adc",
    "sar-adc",
    "12-bit",
    "i2c",
    "tssop-16",
    "texas-instruments"
  ],
  "component": {
    "mpn": "ADS7828",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Data Converter",
    "subcategory": "SAR ADC",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ads7828.pdf",
    "parts": {
      "symbol": "ads7828.kicad_sym",
      "footprint": "ads7828.kicad_mod",
      "model_3d": "ads7828-etched.glb",
      "model_3d_plain": "ads7828.glb",
      "model_3d_step": "ads7828-etched.step",
      "model_3d_step_plain": "ads7828.step",
      "lbr": "ads7828.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "CH0",
        "type": "input",
        "description": "Analog input channel 0. Selectable through the 8-channel multiplexer; input range 0 to VREF referenced to COM (or ground in single-ended mode)."
      },
      {
        "number": "2",
        "name": "CH1",
        "type": "input",
        "description": "Analog input channel 1. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "3",
        "name": "CH2",
        "type": "input",
        "description": "Analog input channel 2. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "4",
        "name": "CH3",
        "type": "input",
        "description": "Analog input channel 3. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "5",
        "name": "CH4",
        "type": "input",
        "description": "Analog input channel 4. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "6",
        "name": "CH5",
        "type": "input",
        "description": "Analog input channel 5. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "7",
        "name": "CH6",
        "type": "input",
        "description": "Analog input channel 6. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "8",
        "name": "CH7",
        "type": "input",
        "description": "Analog input channel 7. Selectable through the 8-channel multiplexer; input range 0 to VREF."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground reference for the device. Connect to the system analog ground plane."
      },
      {
        "number": "10",
        "name": "REFIN/REFOUT",
        "type": "bidirectional",
        "description": "Internal +2.5V reference output / external reference input. Drives out the internal 2.5V reference when the internal reference is enabled; otherwise accepts an external reference between 0.05V and VDD. Bypass with a decoupling capacitor when using the internal reference."
      },
      {
        "number": "11",
        "name": "COM",
        "type": "input",
        "description": "Common input to the analog multiplexer. Acts as the negative input for the ADC in single-ended mode (typically tied to GND) and as a shared reference for pseudo-differential channel pairs."
      },
      {
        "number": "12",
        "name": "A0",
        "type": "input",
        "description": "I2C slave address bit 0 (LSB). Combined with the fixed prefix 10010 and A1 to form the 7-bit device address. CMOS logic level, referenced to VDD."
      },
      {
        "number": "13",
        "name": "A1",
        "type": "input",
        "description": "I2C slave address bit 1. Combined with the fixed prefix 10010 and A0 to form the 7-bit device address, allowing up to four ADS7828 devices on a single I2C bus."
      },
      {
        "number": "14",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input. Supports Standard (100kHz), Fast (400kHz), and High-Speed (3.4MHz) modes. Open-drain bus, requires an external pull-up resistor to VDD."
      },
      {
        "number": "15",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data line. Open-drain, minimum 3mA sink capability; requires an external pull-up resistor to VDD. Carries command bytes and 12-bit conversion results."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply input, 2.7V to 5.25V (3.3V nominal). Bypass with a ceramic decoupling capacitor to GND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ads7828.pdf",
        "pages": 23,
        "sha256": "5d561f2383b6725b",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ads7828.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads7828-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "575cd75342b8c542abf36a47d0fde2be8a9ddde8341ebe68f2ed41b3e6e6a07b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "12-bit SAR ADC",
      "Channels": "8 single-ended / 4 differential",
      "Interface": "I2C (2 address pins)",
      "Throughput": "Up to 50 kSPS",
      "Reference": "Internal 2.5 V or external",
      "Supply": "2.7-5 V",
      "Package": "TSSOP-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ads7828",
    "12-bit i2c adc",
    "8 channel adc",
    "sar adc i2c"
  ],
  "discovery_pitch": "TI ADS7828 12-bit 8-channel I2C SAR ADC (TSSOP-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ads7828.kicad_sym",
    "ads7828.kicad_mod",
    "ads7828.glb",
    "ads7828.step",
    "ads7828.lbr",
    "docs/hero.png",
    "docs/ads7828-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ads7828-etched.step"
  ]
}