ADS8548SRGCT

{
  "slug": "ads8548srgct",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog To Digital Converters (ADC), VQFN-64-EP(9x9). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "data acquisition",
    "ads8548srgct",
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  "component": {
    "mpn": "ADS8548SRGCT",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-64-EP(9x9)",
    "pin_count": 65,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ads8548",
    "parts": {
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    "distributor_links": {
      "lcsc": "C2864875",
      "digikey": "296-29715-2-ND",
      "mouser": "595-ADS8548SRGCT"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T23:25:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-29715-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-ADS8548SRGCT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "HVSS",
        "type": "power_in",
        "description": "Negative supply for the analog inputs, recommended -16.5 V to -5.0 V (-15.0 V nominal), decoupled per the Power Supply Recommendations section."
      },
      {
        "number": "2",
        "name": "CH_D1",
        "type": "passive",
        "description": "Analog input of channel D1; input range is set by the RANGE pin in hardware mode or CONFIG bit C19 (RANGE_D) in software mode, and the pin can be powered down with CONFIG bit C18 (PD_D)."
      },
      {
        "number": "3",
        "name": "REFDN",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair D reference; connect to the decoupling capacitor and AGND per the Power Supply Recommendations section."
      },
      {
        "number": "4",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "5",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "6",
        "name": "REFDP",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair D reference; connect to the decoupling capacitor per the Power Supply Recommendations section."
      },
      {
        "number": "7",
        "name": "CH_D0",
        "type": "passive",
        "description": "Analog input of channel D0; input range is set by the RANGE pin in hardware mode or CONFIG bit C19 (RANGE_D) in software mode, and the pin can be powered down with CONFIG bit C18 (PD_D)."
      },
      {
        "number": "8",
        "name": "PAR/SER",
        "type": "input",
        "description": "Interface mode select; low selects the parallel interface and high enables the serial interface."
      },
      {
        "number": "9",
        "name": "STBY",
        "type": "input",
        "description": "Hardware mode: low powers down the entire device including the conversion clock and reference, high gives normal operation; software mode: connect to DGND or DVDD (standby can use CONFIG bit C25)."
      },
      {
        "number": "10",
        "name": "RESET",
        "type": "input",
        "description": "Active-high reset that aborts ongoing conversions and resets CONFIG to 000003FFh; the reset pulse must be at least 50 ns long."
      },
      {
        "number": "11",
        "name": "REFEN/WR",
        "type": "input",
        "description": "Hardware mode: high enables the internal reference and its buffers, low disables it so an external reference is applied at REFIO; software mode: parallel write input (active with CS and WR low), or connect to DGND or DVDD in serial mode."
      },
      {
        "number": "12",
        "name": "RD",
        "type": "input",
        "description": "Parallel read input; when low the parallel data output is enabled (if CS = 0), and it must be connected to DGND in serial mode."
      },
      {
        "number": "13",
        "name": "CS/FS",
        "type": "input",
        "description": "Parallel mode: chip select, low enables the parallel interface and high disables it; serial mode: frame synchronization, where the FS falling edge controls the frame transfer."
      },
      {
        "number": "14",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "15",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "16",
        "name": "DB15/SDO_D",
        "type": "bidirectional",
        "description": "Data bit 15 (MSB) input/output; in serial mode it is the SDO_D data output when SEL_CD = 1 and must be tied to DGND when SEL_CD = 0 (sign extension for ADS8528 and ADS8548)."
      },
      {
        "number": "17",
        "name": "DB14/SDO_C",
        "type": "bidirectional",
        "description": "Data bit 14 input/output; in serial mode it is the SDO_C data output when SEL_CD = 1 and must be tied to DGND when SEL_CD = 0 (sign extension for ADS8528 and ADS8548)."
      },
      {
        "number": "18",
        "name": "DB13/SDO_B",
        "type": "bidirectional",
        "description": "Data bit 13 input/output; in serial mode it is the SDO_B data output when SEL_B = 1 and must be tied to DGND when SEL_B = 0 (MSB for ADS8548, sign extension for ADS8528)."
      },
      {
        "number": "19",
        "name": "DB12/SDO_A",
        "type": "bidirectional",
        "description": "Data bit 12 input/output; in serial mode it is the SDO_A data output for channel pair A, and is the single output for all eight channels when SEL_CD = 0 and SEL_B = 0."
      },
      {
        "number": "20",
        "name": "DB11/REFBUFEN",
        "type": "bidirectional",
        "description": "Data bit 11 input/output (MSB for ADS8528); in hardware mode low enables all internal reference buffers (mandatory if the internal reference is used) and high disables them, while in software mode it connects to DGND or DVDD."
      },
      {
        "number": "21",
        "name": "DB10/SCLK",
        "type": "bidirectional",
        "description": "Data bit 10 input/output; serial interface clock input."
      },
      {
        "number": "22",
        "name": "DB9/SDI",
        "type": "bidirectional",
        "description": "Data bit 9 input/output; in hardware mode it must be connected to DGND, and in software mode it is the serial data input."
      },
      {
        "number": "23",
        "name": "DB8/DCEN",
        "type": "bidirectional",
        "description": "Data bit 8 input/output; daisy-chain enable input, where high makes DB[3:0] the daisy-chain inputs DCIN_[A:D], and it must be connected to DGND if daisy-chaining is not used."
      },
      {
        "number": "24",
        "name": "DGND",
        "type": "power_in",
        "description": "Buffer I/O ground; connect to the digital ground plane."
      },
      {
        "number": "25",
        "name": "DVDD",
        "type": "power_in",
        "description": "Buffer I/O supply, recommended 2.7 V to 5.5 V (3.3 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "26",
        "name": "DB7",
        "type": "bidirectional",
        "description": "Data bit 7 input/output; must be connected to DGND."
      },
      {
        "number": "27",
        "name": "DB6/SEL_B",
        "type": "bidirectional",
        "description": "Data bit 6 input/output; select SDO_B input, where low disables SDO_B so all eight channels are only available on SDO_A, and high (with SEL_CD = 0) puts channel pairs B and D on SDO_B, or only channel pair B when SEL_CD = 1."
      },
      {
        "number": "28",
        "name": "DB5/SEL_CD",
        "type": "bidirectional",
        "description": "Data bit 5 input/output; select SDO_C and SDO_D input, where high puts channel pair C on SDO_C and pair D on SDO_D, and low routes channel pairs to SDO_A/SDO_B according to SEL_B."
      },
      {
        "number": "29",
        "name": "DB4",
        "type": "bidirectional",
        "description": "Data bit 4 input/output; connect to DGND."
      },
      {
        "number": "30",
        "name": "DB3/DCIN_A",
        "type": "bidirectional",
        "description": "Data bit 3 input/output; when DCEN = 1 it is the daisy-chain data input for SDO_A of the previous device, and when DCEN = 0 it must be connected to DGND."
      },
      {
        "number": "31",
        "name": "DB2/DCIN_B",
        "type": "bidirectional",
        "description": "Data bit 2 input/output; when DCEN = 1 and SEL_B = 1 it is the daisy-chain data input for SDO_B of the previous device, and when DCEN = 0 it must be connected to DGND."
      },
      {
        "number": "32",
        "name": "DB1/DCIN_C",
        "type": "bidirectional",
        "description": "Data bit 1 input/output; when DCEN = 1 and SEL_CD = 1 it is the daisy-chain data input for SDO_C of the previous device, and when DCEN = 0 it must be connected to DGND."
      },
      {
        "number": "33",
        "name": "DB0/DCIN_D",
        "type": "bidirectional",
        "description": "Data bit 0 (LSB) input/output; when DCEN = 1 and SEL_CD = 1 it is the daisy-chain data input for SDO_D of the previous device, and when DCEN = 0 it must be connected to DGND."
      },
      {
        "number": "34",
        "name": "RANGE/XCLK",
        "type": "bidirectional",
        "description": "Hardware mode: analog input range select, low gives ±4 VREF and high gives ±2 VREF; software mode: external conversion clock input (CONFIG C29 = 1) or internal conversion clock output (CONFIG C28 = 1), and connect to DGND if unused."
      },
      {
        "number": "35",
        "name": "BUSY/INT",
        "type": "output",
        "description": "Converter busy status output that goes high at conversion start and pulses low for one tCCLK per completed channel pair; when CONFIG C27 = 1 it is an interrupt output valid only when all CONVST_x are tied together, with polarity set by C26."
      },
      {
        "number": "36",
        "name": "ASLEEP",
        "type": "input",
        "description": "Auto-sleep enable input; when high the device enters auto-sleep mode with hold and conversion activated six tCCLK cycles after a CONVST_x, and when low it operates in normal mode."
      },
      {
        "number": "37",
        "name": "CONVST_A",
        "type": "input",
        "description": "Conversion start for channel pair A; its rising edge starts simultaneous conversion of CH_A[1:0] and resets the channel state machine so data output begins with channel A0."
      },
      {
        "number": "38",
        "name": "CONVST_B",
        "type": "input",
        "description": "Conversion start for channel pair B; its rising edge starts simultaneous conversion of CH_B[1:0]."
      },
      {
        "number": "39",
        "name": "CONVST_C",
        "type": "input",
        "description": "Conversion start for channel pair C; its rising edge starts simultaneous conversion of CH_C[1:0]."
      },
      {
        "number": "40",
        "name": "CONVST_D",
        "type": "input",
        "description": "Conversion start for channel pair D; its rising edge starts simultaneous conversion of CH_D[1:0]."
      },
      {
        "number": "41",
        "name": "HW/SW",
        "type": "input",
        "description": "Mode select; low selects hardware mode where the device follows the external pins, and high selects software mode where it is configured through the CONFIG register."
      },
      {
        "number": "42",
        "name": "CH_A0",
        "type": "passive",
        "description": "Analog input of channel A0; channel pair A is the master pair that is always active, with range set by the RANGE pin or CONFIG bit C24 (RANGE_A), and must run at the highest data rate when pairs run at different rates."
      },
      {
        "number": "43",
        "name": "REFAP",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair A reference; connect to the decoupling capacitor per the Power Supply Recommendations section."
      },
      {
        "number": "44",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "45",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "46",
        "name": "REFAN",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair A reference; connect to the decoupling capacitor and AGND per the Power Supply Recommendations section."
      },
      {
        "number": "47",
        "name": "CH_A1",
        "type": "passive",
        "description": "Analog input of channel A1; channel pair A is the master pair that is always active, with range set by the RANGE pin or CONFIG bit C24 (RANGE_A), and must run at the highest data rate when pairs run at different rates."
      },
      {
        "number": "48",
        "name": "HVDD",
        "type": "power_in",
        "description": "Positive supply for the analog inputs, recommended 5.0 V to 16.5 V (15.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "49",
        "name": "CH_B0",
        "type": "passive",
        "description": "Analog input of channel B0; input range is set by the RANGE pin in hardware mode or CONFIG bit C23 (RANGE_B) in software mode."
      },
      {
        "number": "50",
        "name": "REFBP",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair B reference; connect to the decoupling capacitor per the Power Supply Recommendations section."
      },
      {
        "number": "51",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "52",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "53",
        "name": "REFBN",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair B reference; connect to the decoupling capacitor and AGND per the Power Supply Recommendations section."
      },
      {
        "number": "54",
        "name": "CH_B1",
        "type": "passive",
        "description": "Analog input of channel B1; input range is set by the RANGE pin in hardware mode or CONFIG bit C23 (RANGE_B) in software mode."
      },
      {
        "number": "55",
        "name": "REFN",
        "type": "passive",
        "description": "Negative reference input/output; connect to a decoupling capacitor and AGND per the Power Supply Recommendations section."
      },
      {
        "number": "56",
        "name": "REFIO",
        "type": "bidirectional",
        "description": "Reference voltage input/output; the internal reference is enabled by REFEN/WR (hardware) or CONFIG C15 (software), its output is set by the internal DAC CONFIG bits C[9:0], and it needs a decoupling capacitor per the Power Supply Recommendations section."
      },
      {
        "number": "57",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "58",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "59",
        "name": "CH_C1",
        "type": "passive",
        "description": "Analog input of channel C1; input range is set by the RANGE pin in hardware mode or CONFIG bit C21 (RANGE_C) in software mode."
      },
      {
        "number": "60",
        "name": "REFCN",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair C reference; connect to the decoupling capacitor and AGND per the Power Supply Recommendations section."
      },
      {
        "number": "61",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply, recommended 4.5 V to 5.5 V (5.0 V nominal); decouple per the Power Supply Recommendations section."
      },
      {
        "number": "62",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground; connect to the analog ground plane."
      },
      {
        "number": "63",
        "name": "REFCP",
        "type": "passive",
        "description": "Decoupling capacitor input for the channel pair C reference; connect to the decoupling capacitor per the Power Supply Recommendations section."
      },
      {
        "number": "64",
        "name": "CH_C0",
        "type": "passive",
        "description": "Analog input of channel C0; input range is set by the RANGE pin in hardware mode or CONFIG bit C21 (RANGE_C) in software mode."
      },
      {
        "number": "65",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The VQFN-64 exposed thermal pad (7.3 mm x 7.3 mm, shown on the RGC top view on page 4) is not given ; Pin descriptions are condensed to one sentence each from multi-paragraph datasheet entries. Parallel; Pin type mapping: DIO pins mapped to bidirectional, DI pins to input, DO to output, analog inputs (A",
          "exposed pad 65 added from the footprint"
        ],
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        "cost_usd": 0.152,
        "at": "2026-10-08T23:24:16"
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        "url": "https://www.ti.com/cn/lit/gpn/ads8548",
        "pages": 62,
        "sha256": "c3931541d3d34e55",
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