# ADS8866IDRCT

**Texas Instruments** · Analog To Digital Converters (ADC) · WSON-10-EP(3x3)

ADS8866IDRCT from Texas Instruments, in a WSON-10-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 | REF | input | Positive reference input; this pin must be decoupled with a 10-µF or larger capacitor, and the reference voltage is 2.5 V to 5 V. |
| 2 | AVDD | power_in | Analog power supply; this pin must be decoupled to GND with a 1-µF capacitor, and AVDD is 2.7 V to 3.6 V. |
| 3 | AINP | input | Noninverting analog signal input, with a unipolar single-ended input range of 0 to +VREF. |
| 4 | AINN | input | Inverting analog signal input, which is the reference side of the single-ended input. |
| 5 | GND | power_in | Device ground; this common pin serves both the analog supply (AVDD) and the digital I/O supply (DVDD), and the reference return is internally connected to it. |
| 6 | CONVST | input | Convert input that also functions as the CS input in 3-wire interface mode. |
| 7 | DOUT | output | Serial data output, synchronized with the SCLK clock. |
| 8 | SCLK | input | Clock input for the serial interface; data on DOUT is synchronized with this clock. |
| 9 | DIN | input | Serial data input; the DIN level at the start of a conversion selects the operating mode (such as CS or daisy-chain mode), and it also serves as the CS input in 4-wire interface mode. |
| 10 | DVDD | power_in | Digital interface power supply; this pin must be decoupled to GND with a 1-µF capacitor, and DVDD is 1.65 V to 3.6 V. |
| 11 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(3x3) |
| Category | Data Acquisition |
| Pins | 11 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| AINP to GND or AINN to GND |  | -0.3 |  |  | V | maximum printed as REF + 0.3 | 5 |
| AVDD to GND or DVDD to GND |  | -0.3 |  | 4 | V |  | 5 |
| REF to GND |  | -0.3 |  | 5.7 | V |  | 5 |
| Digital input voltage to GND |  | -0.3 |  |  | V | maximum printed as DVDD + 0.3 | 5 |
| Digital output to GND |  | -0.3 |  |  | V | maximum printed as DVDD + 0.3 | 5 |
| Input current to any pin except supply pins |  | -10 |  | 10 | mA |  | 5 |
| Operating temperature | TA | -40 |  | 85 | °C |  | 5 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 5 |
| Electrostatic discharge, human-body model | V(ESD) | -2000 |  | 2000 | V | HBM per ANSI/ESDA/JEDEC JS-001 | 5 |
| Electrostatic discharge, charged-device model | V(ESD) | -500 |  | 500 | V | CDM per JEDEC JESD22-C101 | 5 |
| Analog power supply | AVDD |  | 3 |  | V |  | 5 |
| Digital power supply | DVDD |  | 3 |  | V |  | 5 |
| Reference voltage | VREF |  | 5 |  | V |  | 5 |
| Junction-to-ambient thermal resistance | RθJA |  | 111.1 |  | °C/W | DRC (VSON) package | 5 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 46.4 |  | °C/W | DRC (VSON) package | 5 |
| Junction-to-board thermal resistance | RθJB |  | 45.9 |  | °C/W | DRC (VSON) package | 5 |
| Junction-to-top characterization parameter | ψJT |  | 3.5 |  | °C/W | DRC (VSON) package | 5 |
| Junction-to-board characterization parameter | ψJB |  | 45.5 |  | °C/W | DRC (VSON) package | 5 |
| Full-scale input span |  | 0 |  |  | V | AINP, AINN; maximum printed as VREF | 6 |
| Operating input range AINP |  | -0.1 |  |  | V | AINP; maximum printed as VREF + 0.1 | 6 |
| Operating input range AINN |  | -0.1 |  | 0.1 | V | AINN | 6 |
| VREF input range | VREF | 2.5 |  | 5 | V |  | 6 |
| Decoupling capacitor at the REF input | CREF | 10 |  | 22 | µF |  | 6 |
| Differential linearity | DNL | -0.99 | 0.6 | 1 | LSB |  | 6 |
| Integral linearity | INL | -2 | 0.8 | 2 | LSB |  | 6 |
| Offset error | EO | -4 | 1 | 4 | mV |  | 6 |
| Offset error drift with temperature |  | -1.5 |  | 1.5 | µV/°C |  | 6 |
| Gain error | EG | -0.01 | 0.005 | 0.01 | %FSR |  | 6 |
| Gain error drift with temperature |  | -0.15 |  | 0.15 | ppm/°C |  | 6 |
| Common-mode rejection ratio | CMRR | 90 | 100 |  | dB | With common-mode input signal = 5 VPP at dc | 6 |
| Signal-to-noise + distortion at 1 kHz | SINAD | 90.5 | 92.9 |  | dB | At 1 kHz, VREF = 5 V | 7 |
| Signal-to-noise ratio at 1 kHz | SNR | 92 | 93 |  | dB | At 1 kHz, VREF = 5 V | 7 |
| Analog supply voltage | AVDD | 2.7 | 3 | 3.6 | V | Analog supply | 7 |
| Digital supply voltage range | DVDD | 1.65 | 1.8 | 3.6 | V | Digital supply range | 7 |
| Supply current AVDD | IAVDD |  | 0.23 | 0.4 | mA | 100-kHz sample rate, AVDD = 3 V | 7 |
| Power dissipation | PVA |  | 0.7 | 1.2 | mW | 100-kHz sample rate, AVDD = 3 V | 7 |
| Digital input leakage current | ILK | -100 | 10 | 100 | nA |  | 7 |
| Conversion time | tconv | 500 |  | 8800 | ns |  | 8 |
| SCLK frequency | fSCLK | 16 |  | 66.6 | MHz |  | 8 |
| SCLK period | tSCLK | 15 |  | 62.5 | ns |  | 8 |
| SCLK low time | tclkl | 0.45 |  | 0.55 | tSCLK |  | 8 |
| SCLK high time | tclkh | 0.45 |  | 0.55 | tSCLK |  | 8 |

## CAD (KiCad official)

- Symbol: `ADS8866IDRCT`
- Footprint: `Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm`
- 3D model: WSON-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `ads8866idrct-etched.step` / `ads8866idrct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads8866idrct.step` / `ads8866idrct.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/lit/ds/symlink/ads8866.pdf) (48 pp, sha256 `27f211b009303a09`, retrieved 2026-11-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/ads8866idrct-datasheet.pdf)