18 bit, 1 MSPS, 4 channel, Pseudo bipolar, differential ADC with onboard ADC driver OPA

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Product details

Parameters

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Features

  • 1.0-MHz Sample Rate, Zero Latency at Full Speed
  • 18-Bit Resolution
  • Supports Pseudo-Bipolar Differential Input Range:
    -4 V to +4 V with 2-V Common-Mode
  • Built-In Four Channel, Differential Ended Multiplexer;
    with Channel Count Selection and Auto/Manual Mode
  • On-Board Differential ADC Driver (OPA)
  • Buffered Reference Output to Level Shift Bipolar
    ±4-V Input with External Resistance Divider
  • Reference/2 Output to Set Common-Mode for External
    Signal Conditioner
  • 18-/16-/8-Bit Parallel Interface
  • SNR: 98.4dB Typ at 2-kHz I/P
  • THD: –119dB Typ at 2-kHz I/P
  • Power Dissipation: 331.25 mW at 1 MSPS Including
    ADC Driver
  • Internal Reference
  • Internal Reference Buffer
  • 64-Pin QFN Package
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Description

The ADS8284 is a high-performance analog system-on-chip (SoC) device with an 18-bit, 1-MSPS A/D converter, 4-V internal reference, an on-chip ADC driver (OPA), and a 4-channel differential multiplexer. The channel count of the multiplexer and auto/manual scan modes of the device are user selectable.

The ADC driver is designed to leverage the very high noise performance of the differential ADC at optimum power usage levels.

The ADS8284 outputs a buffered reference signal for level shifting of a ±4-V bipolar signal with an external resistance divider. A Vref/2 output signal is available to set the common-mode of a signal conditioning circuit. The device also includes an 18-/16-/8-bit parallel interface.

The ADS8284 is available in a 9 mm × 9 mm, 64-pin QFN package and is characterized from -40°C to 85°C.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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Type Title Date
* Datasheet 18-Bit, 1-MSPS, Pseudo-Bipolar Differential SAR ADC with On-Chip ADC Driver (OP datasheet (Rev. A) Apr. 23, 2014
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov. 10, 2010

Design & development

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Design tools & simulation

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
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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
  • (...)

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VQFN (RGC) 64 View options

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