# ADS8688W (Component) ## Description 16-bit, 500-kSPS, eight-channel, single-supply SAR ADC with ±12-V differential inputs The ADS8684W and ADS8688W are 4-channel and 8-channel, integrated data acquisition systems based on a 16-bit successive approximation (SAR) analogto-digital converter (ADC), operating at a throughput of 500kSPS. The devices feature integrated analog front-end circuitry for each input channel with overvoltage protection up to ±20V, a 4-channel or 8-channel multiplexer with automatic and manual scanning modes, and an on-chip, 4.096V reference with low temperature drift. Operating on a single 5V analog supply, each input channel on the devices can independently support bipolar input ranges of ±12.288V, ±6.144V, and ±3.072V and unipolar input ranges of 12.288V to 0V and 6.144V to 0V. The ADS8684W and ADS8688W offer a simple SPIcompatible serial interface to the digital host and also support daisy-chaining of multiple devices. The digital supply operates from 1.65V to 5.25V, enabling direct interface to a wide range of host controllers Features • 16-Bit ADCs with Integrated Analog Front-End • 4-, 8-Channel MUX with Auto and Manual Scan • Channel-Independent Programmable Inputs: – ±12.288V, ±6.144V, and ±3.072V – 12.288V to 0V and 6.144V to 0V • 5V Analog Supply: 1.65V to 5V I/O Supply • Constant Resistive Input Impedance: 1.2MΩ • Input Overvoltage Protection: Up to ±20V • On-Chip, 4.096V Reference with Low Drift • Excellent Performance: – 500kSPS Aggregate Throughput – DNL: ±0.6LSB; INL: ±0.8LSB – Low Drift for Gain Error and Offset – SNR: 91.5dB; THD: –102dB – Low Power: 65mW • AUX Input → Direct Connection to ADC Inputs • ALARM → High and Low Thresholds per Channel • SPI™-Compatible Interface with Daisy-Chain • Industrial Temperature Range: –40°C to 125°C #commonpartslibrary #ADS8688W #TexasInstruments #ADC #SARADC #DataAcquisition #IndustrialAutomation #SPI #PrecisionADC #AnalogFrontEnd #EmbeddedSystems #MeasurementSystems ## Component Details - **Owner:** adrian95 - **Created:** 6/12/2026 - **Last Updated:** 6/12/2026 - **Visibility:** Public - **Symbol Style:** parametric-v1 - **Part Type:** Integrated Circuit - **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/9c440762da641ccc2b97cc5a619ebf8c2379a294a716eab09cd6792c4beb4849.pdf - **License:** https://creativecommons.org/licenses/by/4.0/ - **Manufacturer Part Number:** ADS8688W - **Manufacturer Name:** Texas Instruments - **Used in:** 8 projects - **Part Type:** Integrated Circuits - **Sub-Type:** Logic - **Manufacturer:** Texas Instruments - **MPN:** ADS8688W - **Mount Type:** Base - **Package / Case Code:** TO - **Pin Count:** 38 - **Logic Function:** AND ## Pins | Pin | Name | Type | |-----|------|------| | 1 | SDI | | | 2 | RST/PD | | | 3 | DAISY | | | 4 | REFSEL | | | 5 | REFIO | | | 6 | REFGND | | | 7 | REFCAP | | | 8 | AGND | | | 9 | AVDD | | | 10 | AUX_INP | | | 11 | AUX_GND | | | 12 | AIN_6P | | | 13 | AIN_6M | | | 14 | AIN_7P | | | 15 | AIN_7M | | | 16 | AIN_0P | | | 17 | AIN_0M | | | 18 | AIN_1P | | | 19 | AIN_1M | | | 20 | AIN_2M | | | 21 | AIN_2P | | | 22 | AIN_3M | | | 23 | AIN_3P | | | 24 | AIN_4M | | | 25 | AIN_4P | | | 26 | AIN_5M | | | 27 | AIN_5P | | | 28 | AGND | | | 29 | AGND | | | 30 | AVDD | | | 31 | AGND | | | 32 | AGND | | | 33 | DGND | | | 34 | DVDD | | | 35 | ALARM | | | 36 | SDO | | | 37 | SCLK | | | 38 | CS | | --- *Generated from [https://www.flux.ai/adrian95/ads8688w~e2j](https://www.flux.ai/adrian95/ads8688w~e2j)*