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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

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 (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