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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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Data sheet

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NEW ADS9324 ACTIVE 16-channel, 16-bit, 1MSPS simultaneous-sampling SAR ADC with integrated analog front end (AFE) Full simultaneous sampling, higher sample rate (1-MSPS), larger input voltage range

ADS8686S

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 1000 Number of input channels 16 Interface type Byte-Wide, Parallel, SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed, Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Over-Voltage Protection, PGA Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 296.98 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 91.9 Digital supply (min) (V) 1.71 Digital supply (max) (V) 5.25
Resolution (Bits) 16 Sample rate (max) (ksps) 1000 Number of input channels 16 Interface type Byte-Wide, Parallel, SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed, Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Over-Voltage Protection, PGA Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 296.98 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 91.9 Digital supply (min) (V) 1.71 Digital supply (max) (V) 5.25
LQFP (PZA) 80 256 mm² (16 mm × 16 mm)
  • 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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* Data sheet ADS8686S 16-Channel, 16-Bit, 1-MSPS, Dual, Simultaneous-Sampling ADC With Integrated Analog Front-End datasheet (Rev. C) PDF | HTML Jul 24, 2020
Application brief Precision ADCs in Servo Drives (Rev. A) PDF | HTML Oct 29, 2025
Application note EMC Compliance Testing for Precision ADC Systems (Rev. A) PDF | HTML May 27, 2022
Application note Expanding Analog Input Channels in Grid Applications (Using 16-Channel, 16-Bit, (Rev. A) Feb 26, 2021
Application note Reducing Phase Delay by Averaging on ADS8686S with Burst Sequencer Mode PDF | HTML Jan 11, 2021
Circuit design Circuit for protecting ADC with TVS diode and PTC fuse PDF | HTML Aug 3, 2020
Application brief Wide Common-Mode Differential Analog Input Module Solutions for Factory Automati Jan 15, 2020

Design & development

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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 (...)

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Simulation model

ADS8686S IBIS Model

SBAM439.ZIP (69 KB) - IBIS model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software 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 operational-amplifier (...)

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Design tool

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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Reference design

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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