18 Bit 1.25MSPS Parallel ADC W/Ref, Pseudo Bipolar, Fully Differential Input

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Parameters

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Features

  • 1.25-MHz Sample Rate
  • ±1.5 LSB Typ, ±2.5 LSB Max INL
  • +0.8/-0.6 LSB Typ, +1.5/-1 LSB Max DNL
  • 18-Bit NMC Ensured Over Temperature
  • ±0.5-mV Offset Error
  • TBD-PPM/°C Offset Error Drift
  • ±0.1 %FSR Gain Error
  • ±TBD-PPM/°C Gain Error Drift
  • 99dB SNR, -117db THD, 120dB SFDR
  • Zero Latency
  • Low Power: 235 mW Typ at 1.25 MSPS
  • Pseudo-Bipolar Fully Differential Input Range: Vref to -Vref
  • Onboard Reference with TBD PPM/°C Drift
  • Onboard Reference Buffer
  • High-Speed Parallel Interface
  • Wide Digital Supply 2.7 V to 5.25 V
  • 8-/16-/18-Bit Bus Transfer
  • 48-Pin 7x7 QFN Package
  • APPLICATIONS
    • Medical Instruments
    • Optical Networking
    • Transducer Interface
    • High Accuracy Data Acquisition Systems
    • Magnetometers

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Description

The ADS8484 is an 18-bit, 1.25-MSPS A/C converter with an internal 4.096-V reference and a pseudo-bipolar, fully differential input. The device includes a 18-bit capacitor-based SAR A/D converter with inherent sample and hold. The ADS8484 offers a full 18-bit interface, a 16-bit option where data is read using two read cycles, or an 8-bit bus option using three read cycles.

The ADS8484 is available in a 48-lead 7x7 QFN package and is characterized over the industrial -40°C to 85°C temperature range.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet 18Bit 1.25MSPS Pseudo-Bipolar Fully Differential Input, Micropower Sampling ADC datasheet Jun. 29, 2007
White papers Voltage-reference impact on total harmonic distortion Aug. 01, 2016
White papers Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015
Application notes Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
User guides ADS848xEVM User's Guide (Rev. A) Sep. 09, 2008

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SLAM071.ZIP (53 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
  • (...)
CALCULATION TOOLS Download
Jitter and SNR Calculator for ADCs
JITTER-SNR-CALC JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.

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VQFN (RGZ) 48 View options

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