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ADS8686S

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16-channel 16-bit 1-MSPS dual simultaneous-sampling ADC with integrated analog front end (AFE)

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Product details

Parameters

Resolution (Bits) 16 Number of input channels 16 Sample rate (Max) (kSPS) 1000 Interface type Byte-Wide, Parallel, 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 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

LQFP (PZA) 80 196 mm² 14 x 14 LQFP (PZA) 80 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 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

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Description

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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet ADS8686S 16-Channel, 16-Bit, 1-MSPS, Dual, Simultaneous Sampling ADC datasheet (Rev. C) Jul. 24, 2020
Application notes Circuit for protecting ADC with TVS diode and PTC fuse Aug. 03, 2020
Application notes Expanding Analog Input Channels in Grid Applications (Using 16-Channel, 16-Bit, Jun. 15, 2020
Application notes Wide Common-Mode Differential Analog Input Module Solutions for Factory Automati Jan. 15, 2020
User guides ADS8686SEVM-PDK User's Guide Nov. 11, 2019

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
149
Description

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 (PHI (...)

Features
  • Includes hardware and software required for diagnostic testing, as well as accurate performance of ADS8686S ADC
  • PHI controller provides a convenient communication interface to ADS8686SEVM over USB 2.0 (or higher) for power delivery, as well as digital input/output
  • Easy-to-use evaluation software for (...)

Software development

SUPPORT SOFTWARE Download
SBAC260.ZIP (338266 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM439.ZIP (69 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
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
CALCULATION TOOLS Download
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 (...)
CALCULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
High accuracy analog input module reference design with 16-bit 1-MSPS dual simultaneous-sampling ADC
TIDA-01576 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
LQFP (PZA) 80 View options

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