component
ADS1211U
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Texas Instruments Analog To Digital Converters (ADC), SOIC-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+60@@ -0,0 +1,60 @@+# ADS1211U++**Texas Instruments** · Analog To Digital Converters (ADC) · SOIC-24-300mil++ADS1211U from Texas Instruments, in a SOIC-24-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | AIN3N | input | Inverting input for Channel 3 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 2 | AIN2P | input | Noninverting input for Channel 2 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 3 | AIN2N | input | Inverting input for Channel 2 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 4 | AIN1P | input | Noninverting input for Channel 1 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 5 | AIN1N | input | Inverting input for Channel 1 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 6 | AGND | power_in | Analog ground reference for all analog circuits. |+| 7 | VBIAS | power_out | Bias voltage output providing +3.3V nominal to external circuits. |+| 8 | CS | input | Chip select input for serial interface synchronization. |+| 9 | DSYNC | input | Control input to synchronize output data of multiple converters. |+| 10 | XIN | input | System clock input for external crystal or oscillator. |+| 11 | XOUT | output | System clock output for crystal or resonator connection. |+| 12 | DGND | power_in | Digital ground reference for all digital circuits. |+| 13 | DVDD | power_in | Digital supply at +5V nominal with range 4.75V to 5.25V, must not exceed AVDD +0.3V. |+| 14 | SCLK | bidirectional | Serial clock input/output for synchronous serial data transfer. |+| 15 | SDIO | bidirectional | Serial data input with capability to function as serial data output. |+| 16 | SDOUT | output | Serial data output for transmission of conversion results with tri-state capability. |+| 17 | DRDY | output | Data ready output signal indicating completion of conversion. |+| 18 | MODE | input | Mode select input determining operation as Master (1) or Slave (0). |+| 19 | AVDD | power_in | Analog supply at +5V nominal with operating range 4.75V to 5.25V. |+| 20 | REFOUT | power_out | Reference voltage output providing +2.5V nominal. |+| 21 | REFIN | input | Reference input with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 22 | AIN4P | input | Noninverting input for Channel 4 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 23 | AIN4N | input | Inverting input for Channel 4 with voltage limits from AGND -0.3V to AVDD +0.3V. |+| 24 | AIN3P | input | Noninverting input for Channel 3 with voltage limits from AGND -0.3V to AVDD +0.3V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-24-300mil |+| Category | Data Acquisition |+| Pins | 24 |++## CAD (KiCad official)++- Symbol: `ADS1211U`+- Footprint: `Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm`+- 3D model: SOIC-24-300mil (KiCad packages3D, STEP)+- 3D model files: `ads1211u-etched.step` / `ads1211u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads1211u.step` / `ads1211u.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ads1211) (48 pp, sha256 `2cc9abe579c33ee4`, retrieved 2026-10-07, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ads1211u-datasheet.pdf)
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"ads1211u-etched.step",+ "model_3d_step_plain": "ads1211u.step",+ "lbr": "ads1211u.lbr"+ },+ "distributor_links": {+ "lcsc": "C189448",+ "digikey": "ADS1211U-ND",+ "mouser": "595-ADS1211U"+ },+ "distributor_check": {+ "checked_at": "2026-10-07T13:46:17Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "ADS1211U-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-ADS1211U",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "AIN3N",+ "type": "input",+ "description": "Inverting input for Channel 3 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "2",+ "name": "AIN2P",+ "type": "input",+ "description": "Noninverting input for Channel 2 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "3",+ "name": "AIN2N",+ "type": "input",+ "description": "Inverting input for Channel 2 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "4",+ "name": "AIN1P",+ "type": "input",+ "description": "Noninverting input for Channel 1 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "5",+ "name": "AIN1N",+ "type": "input",+ "description": "Inverting input for Channel 1 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "6",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground reference for all analog circuits."+ },+ {+ "number": "7",+ "name": "VBIAS",+ "type": "power_out",+ "description": "Bias voltage output providing +3.3V nominal to external circuits."+ },+ {+ "number": "8",+ "name": "CS",+ "type": "input",+ "description": "Chip select input for serial interface synchronization."+ },+ {+ "number": "9",+ "name": "DSYNC",+ "type": "input",+ "description": "Control input to synchronize output data of multiple converters."+ },+ {+ "number": "10",+ "name": "XIN",+ "type": "input",+ "description": "System clock input for external crystal or oscillator."+ },+ {+ "number": "11",+ "name": "XOUT",+ "type": "output",+ "description": "System clock output for crystal or resonator connection."+ },+ {+ "number": "12",+ "name": "DGND",+ "type": "power_in",+ "description": "Digital ground reference for all digital circuits."+ },+ {+ "number": "13",+ "name": "DVDD",+ "type": "power_in",+ "description": "Digital supply at +5V nominal with range 4.75V to 5.25V, must not exceed AVDD +0.3V."+ },+ {+ "number": "14",+ "name": "SCLK",+ "type": "bidirectional",+ "description": "Serial clock input/output for synchronous serial data transfer."+ },+ {+ "number": "15",+ "name": "SDIO",+ "type": "bidirectional",+ "description": "Serial data input with capability to function as serial data output."+ },+ {+ "number": "16",+ "name": "SDOUT",+ "type": "output",+ "description": "Serial data output for transmission of conversion results with tri-state capability."+ },+ {+ "number": "17",+ "name": "DRDY",+ "type": "output",+ "description": "Data ready output signal indicating completion of conversion."+ },+ {+ "number": "18",+ "name": "MODE",+ "type": "input",+ "description": "Mode select input determining operation as Master (1) or Slave (0)."+ },+ {+ "number": "19",+ "name": "AVDD",+ "type": "power_in",+ "description": "Analog supply at +5V nominal with operating range 4.75V to 5.25V."+ },+ {+ "number": "20",+ "name": "REFOUT",+ "type": "power_out",+ "description": "Reference voltage output providing +2.5V nominal."+ },+ {+ "number": "21",+ "name": "REFIN",+ "type": "input",+ "description": "Reference input with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "22",+ "name": "AIN4P",+ "type": "input",+ "description": "Noninverting input for Channel 4 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "23",+ "name": "AIN4N",+ "type": "input",+ "description": "Inverting input for Channel 4 with voltage limits from AGND -0.3V to AVDD +0.3V."+ },+ {+ "number": "24",+ "name": "AIN3P",+ "type": "input",+ "description": "Noninverting input for Channel 3 with voltage limits from AGND -0.3V to AVDD +0.3V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 14,+ "cost_usd": 0.1766,+ "at": "2026-10-07T13:46:00"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/ads1211",+ "pages": 48,+ "sha256": "2cc9abe579c33ee4",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 24,+ "described": 24,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "ads1211u.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 15.4,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "4b0d20f82f5b0124fecfe11c941274a3c865a30f7baee8b8fadd7df55972d4cd",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "ads1211u-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 15.4,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "0681ae18a5394f108e5982bba1269c3ecf121c53aafc78d27151743555a276d8",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}