16-bit, 250-kSPS, 8-ch SAR ADC with VREF, VREF buffer and direct sensor interface


Product details


Resolution (Bits) 16 Number of input channels 8 Sample rate (Max) (kSPS) 250 Interface type SPI, Enhanced SPI Architecture SAR Input type Pseudo-Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 5 Input range (Min) (V) 0 Features Comparator Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 15 Analog voltage AVDD (Min) (V) 3 SNR (dB) 92 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 0.8 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

VQFN (RHB) 32 25 mm² 5 x 5 open-in-new Find other Precision ADCs (<=10MSPS)


  • Compact low-power data acquisition system:
    • MUX breakout enables single external driver amplifier
    • 16-bit SAR ADC
    • Low-drift integrated reference and buffer
    • 0.5 × VREF output for analog input DC biasing
  • Excellent AC and DC performance:
    • SNR: 92 dB, THD: –110 dB
    • INL: ±0.3 LSB, 16-bit no missing codes
  • Multiplexer with channel sequencer:
    • Multiple channel-sequencing options:
      • Manual mode, on-the-fly mode, auto sequence mode, custom channel sequencing
    • Early switching enables direct sensor interface
    • Fast response time with on-the-fly mode
  • System monitoring features:
    • Per channel programmable window comparator
    • False trigger avoidance with programmable hysteresis
  • Enhanced-SPI digital interface:
    • 1-MSPS throughput with 16-MHz SCLK
    • High-speed, 70-MHz digital interface
  • Wide operating range:
    • External VREF input range: 2.5 V to 5 V
    • AVDD from 3 V to 5.5 V
    • DVDD from 1.65 V to 5.5 V
    • –40°C to +125°C temperature range
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The ADS816x is a family of 16-bit, 8-channel, high-precision successive approximation register (SAR) analog-to-digital converters (ADCs) operating from a single 5-V supply with a 1-MSPS (ADS8168),
500-kSPS (ADS8167), and 250-kSPS (ADS8166) total throughput.

The input multiplexer supports extended settling time, which makes driving the analog inputs easier. The output of the multiplexer and ADC analog inputs are available as device pins. This configuration allows one ADC driver op amp to be used for all eight analog inputs of the multiplexer.

The ADS816x features a digital window comparator with programmable high and low alarm thresholds per analog input channel. The single op-amp solution with programmable alarm thresholds enables low power, low cost, and smallest form-factor applications.

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Technical documentation

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Type Title Date
* Data sheet ADS816x 8-Channel, 16-Bit, 1-MSPS, SAR ADC With Direct Sensor Interface datasheet (Rev. C) Nov. 05, 2019
Application note Designing a Cost-Optimized DAQ Solution (Rev. B) Jun. 24, 2019

Design & development

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

Hardware development

document-generic User guide

The ADS8168 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8168 successive-approximation register (SAR) analog-to-digital converter (ADC). The ADS8168EVM-PDK includes the ADS8168EVM board, the precision host interface (PHI (...)

  • Includes hardware and software required for diagnostic testing, as well as accurate performance of the ADS8168 ADC
  • No external power supply required
  • Ships with PHI controller that provides a convenient interface to ADS8168EVM over USB 2.0 (or higher) for power delivery, as well as digital input/output
  • (...)

Design tools & simulation

SBAM392.ZIP (45 KB) - IBIS Model
SBAM393.ZIP (10 KB) - TINA-TI Spice Model
SBAM394.TSC (391 KB) - TINA-TI Reference Design
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 (...)
  • 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
  • (...)
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
  • (...)

CAD/CAE symbols

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VQFN (RHB) 32 View options

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