component
ADS1251U
Public Made by Adomby adom
Texas Instruments Analog To Digital Converters (ADC), SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownADS1251U
Texas Instruments · Analog To Digital Converters (ADC) · SOIC-8
ADS1251U from Texas Instruments, in a SOIC-8. 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 | +VIN | input | Positive input of the differential analog input; accepts analog input voltage from GND - 0.3V to VDD + 0.3V with maximum input current of ±10mA continuous. |
| 2 | -VIN | input | Negative input of the differential analog input; accepts analog input voltage from GND - 0.3V to VDD + 0.3V with maximum input current of ±10mA continuous. |
| 3 | +VDD | power_in | Power-supply voltage input; nominal +5V, operating range 4.75V to 5.25V, quiescent current 1.5 to 2mA. |
| 4 | CLK | input | Device system clock, CMOS-compatible Schmitt-Trigger input; nominal 8MHz, used to determine modulator frequency and data output rate. |
| 5 | DOUT/DRDY | output | Serial data output and data ready indicator; pulses LOW when new data loaded into output register, shifts data MSB-first on falling edge of SCLK. |
| 6 | SCLK | input | Serial clock input, CMOS-compatible Schmitt-Trigger input; operates independently from CLK up to 8MHz; holding HIGH initiates modulator reset for synchronization or enters power-down mode. |
| 7 | GND | power_in | Ground reference for analog and digital sections; should connect to analog ground plane with trace connection to digital ground plane. |
| 8 | VREF | power_in | Reference voltage input; accepts 0.5V to VDD with typical load current of 32µA at 8MHz clock; buffered reference recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Data Acquisition |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
ADS1251U - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ads1251u-etched.step/ads1251u-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ads1251u.step/ads1251u.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (25 pp, sha256
114414aea45f64d9, retrieved 2026-09-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).