16-Bit, Unipolar Differential Input, 500kSPS Serial Out, 4.5V-to-5.5V Micropower Sampling ADC


Product details


Resolution (Bits) 16 Number of input channels 1 Sample rate (Max) (kSPS) 500 Interface type SPI Architecture SAR Input type Differential Multi-channel configuration Rating Catalog Reference mode Ext Input range (Max) (V) 5.5 Input range (Min) (V) -5.5 Features Daisy-Chainable, Small Size Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 18 Analog voltage AVDD (Min) (V) 4.5 SNR (dB) 96 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 2.375 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

VSON (DRC) 10 VSSOP (DGS) 10 open-in-new Find other Precision ADCs (<=10MSPS)


  • 500-kHz Sample Rate
  • 16-Bit Resolution
  • Zero Latency at Full Speed
  • Unipolar, Differential Input, Range: –Vref to Vref
  • SPI Compatible Serial Interface with Daisy Chain Option
  • Excellent Performance:
    • 95.2dB SNR Typ at 10-kHz I/P
    • –108dB THD Typ at 10-kHz I/P
    • ±1.0 LSB Max INL
    • ±0.75 LSB Max DNL
  • Low Power Dissipation: 18 mW Typ at 500 KSPS
  • Power Scales Linearly with Speed: 3.6 mW/100 KSPS
  • Power Dissipation During Power-Down State: 0.25 µW Typ
  • 10-Pin MSOP and SON Packages
    • Battery Powered Equipments
    • Data Acquisition Systems
    • Instrumentation and Process Control
    • Medical Electronics
    • Optical Networking

open-in-new Find other Precision ADCs (<=10MSPS)


The ADS8318 is a 16-bit, 500-KSPS analog-to-digital converter. It operates with a 2.048-V to 5.5-V external reference. The device includes a capacitor based, SAR A/D converter with inherent sample and hold.

The devices includes a 50-MHz SPI compatible serial interface. The interface is designed to support daisy chaining or cascading of multiple devices. Also a Busy Indicator makes it easy to synchronize with the digital host.

The ADS8318 unipolar differential input range supports a differential input swing of –Vref to +Vref with a common-mode of +Vref/2.

Device operation is optimized for very low power operation, and the power consumption directly scales with speed. This feature makes it attractive for lower speed applications.

It is available in 10-pin MSOP and SON packages.

open-in-new Find other Precision ADCs (<=10MSPS)

Technical documentation

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Type Title Date
* Datasheet 16-Bit, 500-KSPS, Serial Interface microPOWER, Miniature SAR ADC* datasheet (Rev. A) Mar. 23, 2011
Application notes Circuit for protecting low-voltage SAR ADC from electrical overstress with minim May 25, 2019
White papers Voltage-reference impact on total harmonic distortion Aug. 01, 2016
White papers Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015
Technical articles Input considerations for SAR ADCs Jun. 20, 2014
Application notes ADC Parameters Unit Conversion Mar. 05, 2013
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov. 10, 2010
Application notes Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 Jun. 24, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

DCPFREETOOL Software Plug-In to Code Composer Studio
DCPFREETOOL The data converter support plug-in is a free tool, which allows the user of Code Composer Studio™ to create initialization data and configuration software for Texas Instruments data converters based on inputs on a graphical user interface.

IMPORTANT: Please read the following before downloading the (...)


The data converter support plug-in (DCP) is a component of TI's Code Composer Studio™ and offers easy-to-use windows for the "point-and-click" configuration of TI's data converters from within the integrated development environment (IDE), preventing illegal combinations of settings. The DCP (...)

Design tools & simulation

SBAM086.ZIP (28 KB) - IBIS Model
SLAM208.ZIP (54 KB) - TINA-TI Spice Model
SLAM209.TSC (2645 KB) - TINA-TI Reference Design
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
Jitter and SNR Calculator for ADCs
JITTER-SNR-CALC JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.

CAD/CAE symbols

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VSON (DRC) 10 View options
VSSOP (DGS) 10 View options

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