# ADS1242IPWR

**Texas Instruments** · Analog To Digital Converters (ADC) · TSSOP-16

ADS1242IPWR from Texas Instruments, in a TSSOP-16. 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 | VDD | power_in | Power supply input rated for 2.7V to 5.25V operation. |
| 2 | XIN | input | Clock input for external oscillator, maximum 5 MHz. |
| 3 | XOUT | output | Clock output for connection to external crystal or ceramic resonator. |
| 4 | PDWN | input | Active LOW power down control that disables analog and digital circuits when LOW. |
| 5 | VREF+ | power_in | Positive differential reference input (0V to VDD); differential voltage (VREF+)−(VREF−) ranges 0.1V to 1.30V (RANGE=0) or 2.6V (RANGE=1). |
| 6 | VREF- | power_in | Negative differential reference input (0V to VDD); differential voltage (VREF+)−(VREF−) ranges 0.1V to 1.30V (RANGE=0) or 2.6V (RANGE=1). |
| 7 | AIN0/D0 | bidirectional | Analog input channel 0 or digital I/O 0, input range GND+0.05V to VDD−1.5V (buffer enabled). |
| 8 | AIN1/D1 | bidirectional | Analog input channel 1 or digital I/O 1, input range GND+0.05V to VDD−1.5V (buffer enabled). |
| 9 | AIN2/D2 | bidirectional | Analog input channel 2 or digital I/O 2, input range GND+0.05V to VDD−1.5V (buffer enabled). |
| 10 | AIN3/D3 | bidirectional | Analog input channel 3 or digital I/O 3, input range GND+0.05V to VDD−1.5V (buffer enabled). |
| 11 | GND | power_in | Ground reference. |
| 12 | CS | input | Active LOW chip select input for SPI serial interface. |
| 13 | DIN | input | Serial data input with Schmitt trigger, 50ns setup time required before SCLK edge. |
| 14 | DOUT | tri_state | Serial data output with tri-state (high impedance) when CS is HIGH, valid 50ns after SCLK edge. |
| 15 | SCLK | input | Serial clock input with Schmitt trigger, minimum period 4 tOSC or 3 DRDY periods. |
| 16 | DRDY | output | Active LOW data ready output indicating when a new conversion result is available. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Data Acquisition |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `ADS1242IPWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `ads1242ipwr-etched.step` / `ads1242ipwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads1242ipwr.step` / `ads1242ipwr.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/ads1243) (34 pp, sha256 `0bf7c17072b2c943`, retrieved 2026-10-05, 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/ads1242ipwr-datasheet.pdf)