# ADS8861IDRCT

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

ADS8861IDRCT 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, which must be decoupled to GND with a 10-μF or larger capacitor; the reference operates from 2.5 V to 5 V independent of AVDD. |
| 2 | AVDD | power_in | Analog power supply, operating from 2.7 V to 3.6 V, which must be decoupled to GND with a 1-μF capacitor. |
| 3 | AINP | input | Noninverting analog signal input; the true-differential input swing is -VREF to +VREF with a common-mode range of 0 V to VREF. |
| 4 | AINN | input | Inverting analog signal input; the true-differential input swing is -VREF to +VREF with a common-mode range of 0 V to VREF. |
| 5 | GND | power_in | Device ground, common to the analog supply (AVDD), digital supply (DVDD) and reference return. |
| 6 | CONVST | input | Convert start input that also functions as the CS input in 3-wire interface mode. |
| 7 | DOUT | output | Serial data output, synchronized with SCLK. |
| 8 | SCLK | input | Clock input for the serial interface, with which the data on DOUT is synchronized. |
| 9 | DIN | input | Serial data input whose level at the start of a conversion selects the operating mode (such as daisy-chain mode), and which also serves as the CS input in 4-wire interface mode. |
| 10 | DVDD | power_in | Digital interface power supply, operating from 2.7 V to 3.6 V independent of AVDD, which must be decoupled to GND with a 1-μF capacitor. |
| 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 Converters |
| 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 |
|---|---|---|---|---|---|---|---|
| AVDD/DVDD to GND |  | -0.3 |  | 4 | V |  | 3 |
| REF to GND |  | -0.3 |  | 5.7 | V |  | 3 |
| Operating temperature range | TA | -40 |  | 85 | °C |  | 3 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 3 |
| Differential linearity | DNL | -0.99 | 0.5 | 1 | LSB |  | 4 |
| Integral linearity | INL | -1 | 0.5 | 1 | LSB | endpoint INL | 4 |
| Offset error | EO | -4 | 1 | 4 | mV |  | 4 |
| Gain error | EG | -0.01 | 0.005 | 0.01 | %FSR |  | 4 |
| Common-mode rejection ratio | CMRR | 90 | 100 |  | dB | With common-mode input signal = 5 VPP at dc | 4 |
| Conversion time | tconv | 500 |  | 710 | ns |  | 4 |
| Acquisition time | tACQ | 290 |  |  | ns |  | 6 |
| Signal-to-noise + distortion | SINAD | 95 | 96.4 |  | dB | At 1 kHz, VREF = 5 V | 5 |
| Signal-to-noise ratio | SNR | 95.1 | 96.5 |  | dB | At 1 kHz, VREF = 5 V | 5 |
| Reference input range | VREF | 2.5 |  | 5 | V |  | 5 |
| Analog supply | AVDD | 2.7 | 3 | 3.6 | V |  | 5 |
| Digital supply | DVDD | 2.7 | 3 | 3.6 | V | Digital supply range for SCLK > 40 MHz | 5 |
| Digital supply | DVDD | 1.65 | 1.8 | 3.6 | V | Digital supply range for SCLK < 40 MHz | 5 |
| Supply current AVDD |  |  | 1.8 | 2.4 | mA | 1-MHz sample rate, AVDD = 3 V | 5 |
| Power dissipation | PVA |  | 5.5 | 7.2 | mW | 1-MHz sample rate, AVDD = 3 V | 5 |
| Digital input leakage current | ILK | -100 |  | 100 | nA |  | 5 |
| Operating free-air temperature | TA | -40 |  | 85 | °C |  | 5 |
| SCLK frequency | fSCLK |  |  | 66.6 | MHz | 3-wire operation | 6 |
| SCLK period | tSCLK | 15 |  |  | ns |  | 6 |
| Quiet time | tquiet | 20 |  |  | ns |  | 6 |
| Junction-to-ambient thermal resistance | θJA |  | 111.1 |  | °C/W | DRC package | 3 |
| Junction-to-case (top) thermal resistance | θJCtop |  | 46.4 |  | °C/W | DRC package | 3 |
| Junction-to-board thermal resistance | θJB |  | 45.9 |  | °C/W | DRC package | 3 |
| Input capacitance | CI |  | 59 |  | pF | AINP and AINN terminal to GND | 4 |
| Device power-down current | IAPD |  | 50 |  | nA |  | 5 |

## CAD (KiCad official)

- Symbol: `ADS8861IDRCT`
- Footprint: `Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm`
- 3D model: WSON-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `ads8861idrct-etched.step` / `ads8861idrct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ads8861idrct.step` / `ads8861idrct.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/ads8861idrct.pdf) (53 pp, sha256 `719c92533079c77c`, retrieved 2026-10-31, tier: manufacturer)
- **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-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/ads8861idrct-datasheet.pdf)