# TLA2518IRTET

**Texas Instruments** · Analog To Digital Converters (ADC) · WQFN-16-EP(3x3)

TLA2518IRTET from Texas Instruments, in a WQFN-16-EP(3x3). 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 | AIN2/GPIO2 | bidirectional | Channel 2; can be configured as either an analog input (default), digital input, or digital output. |
| 2 | AIN3/GPIO3 | bidirectional | Channel 3; can be configured as either an analog input (default), digital input, or digital output. |
| 3 | AIN4/GPIO4 | bidirectional | Channel 4; can be configured as either an analog input (default), digital input, or digital output. |
| 4 | AIN5/GPIO5 | bidirectional | Channel 5; can be configured as either an analog input (default), digital input, or digital output. |
| 5 | AIN6/GPIO6 | bidirectional | Channel 6; can be configured as either an analog input (default), digital input, or digital output. |
| 6 | AIN7/GPIO7 | bidirectional | Channel 7; can be configured as either an analog input (default), digital input, or digital output. |
| 7 | AVDD | power_in | Analog supply input, also used as the reference voltage to the ADC; connect a 1-µF decoupling capacitor to GND. |
| 8 | DECAP | passive | Connect a decoupling capacitor to this pin for the internal power supply. |
| 9 | GND | power_in | Ground for the power supply; all analog and digital signals are referred to this pin voltage. |
| 10 | DVDD | power_in | Digital I/O supply voltage; connect a 1-µF decoupling capacitor to GND. |
| 11 | CS | input | Chip-select input pin; active low; the device takes control of the data bus when CS is low; the device starts converting the active input channel on the rising edge of CS; SDO goes hi-Z when CS is high. |
| 12 | SDO | tri_state | Serial data out for the device; goes high impedance when CS is high. |
| 13 | SCLK | input | Serial clock for the SPI interface. |
| 14 | SDI | input | Serial data in for the device. |
| 15 | AIN0/GPIO0 | bidirectional | Channel 0; can be configured as either an analog input (default), digital input, or digital output. |
| 16 | AIN1/GPIO1 | bidirectional | Channel 1; can be configured as either an analog input (default), digital input, or digital output. |
| 17 | Thermal pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-16-EP(3x3) |
| Category | Data Acquisition |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `TLA2518IRTET`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tla2518irtet-etched.step` / `tla2518irtet-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tla2518irtet.step` / `tla2518irtet.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/tla2518) (43 pp, sha256 `1426341000405282`, retrieved 2026-10-06, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tla2518irtet-datasheet.pdf)