Dual, 2MSPS, 12-Bit, 3+3 or 2+2 Channel, Simultaneous Sampling Analog-To-Digital SAR Converter

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Product details

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Features

  • Four Fully- or Six Pseudo-Differential Inputs
  • SNR: 71dB, THD: –81dB
  • Programmable and Buffered Internal 2.5V Reference
  • Flexible Power-Down Features
  • Variable Power-Supply Ranges: 2.7V to 5.5V
  • Low-Power Operation: 45mW at 5V
  • Operating Temperature Range:
    –40°C to +125°C
  • Pin-Compatible with ADS7861 and ADS8361 (SSOP package)
  • APPLICATIONS
    • Motor Control
    • Multi-Axis Positioning Systems
    • Three-Phase Power Control

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    Description

    The ADS7863 is a dual, 12-bit, 2MSPS, analog-to-digital converter (ADC) with four fully differential or six pseudo-differential input channels grouped into two pairs for high-speed, simultaneous signal acquisition. Inputs to the sample-and-hold (S/H) amplifiers are fully differential and are maintained differential to the input of the ADC. This architecture provides excellent common-mode rejection of 72dB at 100kHz, which is a critical performance characteristic in noisy environments.

    The ADS7863 is pin-compatible with the ADS7861, but offers additional features such as a programmable reference output, flexible supply voltage (2.7V to 5.5V for AVDD and BVDD), a pseudo-differential input multiplexer with three channels per ADC, and several power-down features.

    The ADS7863 is offered in an SSOP-24 and a 4×4mm QFN-24 package. It is specified over the extended operating temperature range of –40°C to +125°C.

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    Technical documentation

    = Top documentation for this product selected by TI
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    Type Title Date
    * Datasheet Dual, 2MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous Sampling ADC datasheet (Rev. E) Jan. 19, 2011
    Application note An Introduction to the ADS7863A Apr. 10, 2013
    User guide ADS7861/7863/8361EVM Users Guide (Rev. A) May 19, 2011
    Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
    Application note Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov. 10, 2010
    Application note Interfacing the ADS786x to TMS470 Processors Jul. 10, 2006
    Application note Interfacing the ADS786x to the MSP430F2013 Jun. 15, 2006

    Design & development

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    Hardware development

    EVALUATION BOARD Download
    49
    Description

    The ADS8361EVM uses a circuit board designated ADS78-8361EVM. This EVM board will accept either the ADS7861 (12bit) or the ADS8361 (16bit) ADC. The ADS7861 operates from 5 volts to supply AVdd & DVdd, while the ADS8361 operates from 2.7V to 3.6V to supply AVdd & DVdd. The evaluation board has a 500 (...)

    Design tools & simulation

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    SBAM178.ZIP (50 KB) - IBIS Model
    SIMULATION TOOL Download
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    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
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    • Supports simultaneous analysis of multiple products
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    SIMULATION TOOL 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 (...)
    CALCULATION TOOL Download
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    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 TOOL 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
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    CAD/CAE symbols

    Package Pins Download
    SSOP (DBQ) 24 View options
    VQFN (RGE) 24 View options

    Ordering & quality

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