Product details

Resolution (Bits) 16 Number of input channels 16 Sample rate (Max) (kSPS) 1000 Interface type Parallel, Byte-Wide, SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed, Simultaneous Sampling Rating Catalog Reference mode Ext, Int Input range (Max) (V) 10 Input range (Min) (V) -10 Features Over-Voltage Protection, PGA Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 296.98 Analog voltage AVDD (Min) (V) 4.75 SNR (dB) 91.9 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 2 Digital supply (Min) (V) 1.71 Digital supply (Max) (V) 5.25
Resolution (Bits) 16 Number of input channels 16 Sample rate (Max) (kSPS) 1000 Interface type Parallel, Byte-Wide, SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed, Simultaneous Sampling Rating Catalog Reference mode Ext, Int Input range (Max) (V) 10 Input range (Min) (V) -10 Features Over-Voltage Protection, PGA Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 296.98 Analog voltage AVDD (Min) (V) 4.75 SNR (dB) 91.9 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 2 Digital supply (Min) (V) 1.71 Digital supply (Max) (V) 5.25
LQFP (PZA) 80 196 mm² 14 x 14
  • 16-channel, 16-bit ADC with integrated analog front-end
  • Dual simultaneous sampling: 8x2 channels
  • Supply:
    • Analog: 5 V
    • Digital: 1.8 V to 5 V
  • Constant 1-MΩ input impedance front-end
  • Independently programmable input ranges with 20% overrange
  • Programmable low-pass filter:
    • 15 kHz, 39 kHz, 376 kHz
  • Excellent DC and AC performance
  • On-chip reference and reference buffer
  • Excellent over temperature performance
  • Overvoltage input clamp with 8-kV ESD
  • Optional cyclic redundancy check (CRC) error checking
  • On-chip self diagnostic function
  • Temperature range: –40°C to +125°C
  • 16-channel, 16-bit ADC with integrated analog front-end
  • Dual simultaneous sampling: 8x2 channels
  • Supply:
    • Analog: 5 V
    • Digital: 1.8 V to 5 V
  • Constant 1-MΩ input impedance front-end
  • Independently programmable input ranges with 20% overrange
  • Programmable low-pass filter:
    • 15 kHz, 39 kHz, 376 kHz
  • Excellent DC and AC performance
  • On-chip reference and reference buffer
  • Excellent over temperature performance
  • Overvoltage input clamp with 8-kV ESD
  • Optional cyclic redundancy check (CRC) error checking
  • On-chip self diagnostic function
  • Temperature range: –40°C to +125°C

The ADS8686S is a 16-channel data acquisition (DAQ) system based on a dual simultaneous-sampling, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC). The ADS8686S features a complete analog front-end for each channel with an input clamp, 1-MΩ input impedance, independently programmable gain amplifier (PGA), programmable low-pass filter, and an ADC input driver. The device also features a low-drift, precision reference with a buffer to drive the ADCs. A flexible digital interface supporting serial, parallel, and byte communication enables the device to be used with a variety of host controllers.

The ADS8686S can be configured to accept ±10-V, ±5-V, or ±2.5-V bipolar inputs with a 20% overrange option using a single 5-V supply. The high input impedance allows direct connection with sensors and transformers, thus eliminating the need for external driver circuits. The ADS8686S has a highly configurable channel sequencer to reduce the sequencing overhead on the backend controller or processor. The high performance and accuracy, along with zero-latency conversions offered by this device make the ADS8686S a great choice for multiple industrial applications.

The ADS8686S is a 16-channel data acquisition (DAQ) system based on a dual simultaneous-sampling, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC). The ADS8686S features a complete analog front-end for each channel with an input clamp, 1-MΩ input impedance, independently programmable gain amplifier (PGA), programmable low-pass filter, and an ADC input driver. The device also features a low-drift, precision reference with a buffer to drive the ADCs. A flexible digital interface supporting serial, parallel, and byte communication enables the device to be used with a variety of host controllers.

The ADS8686S can be configured to accept ±10-V, ±5-V, or ±2.5-V bipolar inputs with a 20% overrange option using a single 5-V supply. The high input impedance allows direct connection with sensors and transformers, thus eliminating the need for external driver circuits. The ADS8686S has a highly configurable channel sequencer to reduce the sequencing overhead on the backend controller or processor. The high performance and accuracy, along with zero-latency conversions offered by this device make the ADS8686S a great choice for multiple industrial applications.

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Technical documentation

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Type Title Date
* Data sheet ADS8686S 16-Channel, 16-Bit, 1-MSPS, Dual, Simultaneous Sampling ADC datasheet (Rev. C) 24 Jul 2020
Technical article How smart AFEs offer an integrated analog solution for thermoelectric cooling control 04 Jan 2022
Application note Expanding Analog Input Channels in Grid Applications (Using 16-Channel, 16-Bit, (Rev. A) 26 Feb 2021
Application note Reducing Phase Delay by Averaging on ADS8686S with Burst Sequencer Mode 11 Jan 2021
Application note Circuit for protecting ADC with TVS diode and PTC fuse 03 Aug 2020
Application note Wide Common-Mode Differential Analog Input Module Solutions for Factory Automati 15 Jan 2020
User guide ADS8686SEVM-PDK User's Guide 11 Nov 2019

Design & development

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

Evaluation board

ADS8686SEVM-PDK — ADS8686S 16-channel 16-bit 1-MSPS dual simultaneous-sampling ADC performance demonstration kit (PDK)

The ADS8686S evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the ADS8686S dual simultaneous-sampling analog-to-digital converter (ADC) with an integrated analog front end (AFE).

ADS8686SEVM-PDK includes the ADS8686SEVM board and a precision host interface (...)

Simulation model

ADS8686S IBIS Model

SBAM439.ZIP (69 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

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 (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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 (...)
Reference designs

TIDA-01576 — High accuracy analog input module reference design with 16-bit 1-MSPS dual simultaneous-sampling ADC

This reference design accurately measures 16-channel AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range. This range covers protection and measurement requirements (including sampling requirements as per IEC 61850-9-2), which simplifies system design and improves (...)
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