# ADS7128IRTER

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

ADS7128IRTER from Texas Instruments, in a WQFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | AIN2/GPIO2 | bidirectional | Channel 2 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 2 | AIN3/GPIO3 | bidirectional | Channel 3 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 3 | AIN4/GPIO4 | bidirectional | Channel 4 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 4 | AIN5/GPIO5 | bidirectional | Channel 5 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 5 | AIN6/GPIO6 | bidirectional | Channel 6 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 6 | AIN7/GPIO7 | bidirectional | Channel 7 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 7 | AVDD | power_in | Analog supply voltage and reference voltage for ADC; operating range 2.35 V to 5.5 V; requires 1-µF low-ESR decoupling capacitor to GND. |
| 8 | DECAP | passive | Decoupling capacitor connection for internal power supply; connect capacitor in range 0.22 µF to 1 µF. |
| 9 | GND | power_in | Ground reference for all analog and digital signals; maximum voltage -0.3 V to GND. |
| 10 | DVDD | power_in | Digital I/O supply voltage; operating range 1.65 V to 5.5 V; requires 1-µF decoupling capacitor to GND. |
| 11 | ADDR | input | I2C address selector input; connect external resistor from this pin to DECAP or GND to select one of eight I2C addresses; input range -0.3 V to 2.1 V. |
| 12 | ALERT | output | Digital comparator alert output; configurable as open-drain (default) or push-pull output with maximum sink current of 5 mA; can indicate CRC error or RMS completion. |
| 13 | SCL | input | I2C serial clock input; supports standard mode (up to 400 kHz), fast mode, fast mode plus, and high-speed mode (up to 3.4 MHz) with input thresholds 0.7 × DVDD (high) and 0.3 × DVDD (low). |
| 14 | SDA | bidirectional | I2C serial data input/output pin; supports standard mode (up to 400 kHz), fast mode, fast mode plus, and high-speed mode (up to 3.4 MHz) with input thresholds 0.7 × DVDD (high) and 0.3 × DVDD (low). |
| 15 | AIN0/GPIO0 | bidirectional | Channel 0 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 16 | AIN1/GPIO1 | bidirectional | Channel 1 configurable as analog input (default), digital input, or digital output; input range -0.3 V to AVDD + 0.3 V with maximum pin current of ±10 mA. |
| 17 | EP | 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: `ADS7128IRTER`
- 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: `ads7128irter-etched.step` / `ads7128irter-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads7128irter.step` / `ads7128irter.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/ads7128) (81 pp, sha256 `15b04478f2faa591`, retrieved 2026-09-23, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/ads7128irter-datasheet.pdf)