ADS1258

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24-bit, 125kSPS, 16-ch delta-sigma ADC with fast channel scan and automatic sequencer

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 16 Sample rate (Max) (kSPS) 125 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 2.85, 5.35 Input range (Min) (V) -2.7, 0 Features GPIO, Oscillator Operating temperature range (C) -40 to 105 Power consumption (Typ) (mW) 42 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

VQFNP (RTC) 48 49 mm² 7 x 7 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 24 Bits, No Missing Codes
  • Fixed-Channel or Automatic Channel Scan
  • Fixed-Channel Data Rate: 125kSPS
  • Auto-Scan Data Rate: 23.7kSPS/Channel
  • Single-Conversion Settled Data
  • 16 Single-Ended or 8 Differential Inputs
  • Unipolar (+5V) or Bipolar (±2.5V) Operation
  • Low Noise: 2.8µVRMS at 1.8kSPS
  • 0.0003% Integral Nonlinearity
  • DC Stability (typical):
    0.02µV/°C Offset Drift, 0.4ppm/°C Gain Drift
  • Open-Sensor Detection
  • Conversion Control Pin
  • Multiplexer Output for External Signal Conditioning
  • On-Chip Temperature, Reference, Offset, Gain, and Supply Voltage Readback
  • 42mW Power Dissipation
  • Standby, Sleep, and Power-Down Modes
  • 8 General-Purpose Inputs/Outputs (GPIO)
  • 32.768kHz Crystal Oscillator or External Clock
  • APPLICATIONS
    • Medical, Avionics, and Process Control
    • Machine and System Monitoring
    • Fast Scan Multi-Channel Instrumentation
    • Industrial Systems
    • Test and Measurement Systems

SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.

open-in-new Find other Precision ADCs (<=10MSPS)

Description

The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma () analog-to-digital converter (ADC) that provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second (SPS) per channel. A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5V or true bipolar range of ±2.5V when operating with a 5V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.

The differential output of the multiplexer is accessible to allow signal conditioning prior to the input of the ADC. Internal system monitor registers provide supply voltage, temperature, reference voltage, gain, and offset data.

An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an external clock source. A buffered system clock output (15.7MHz) is provided to drive a microcontroller or additional converters.

Serial digital communication is handled via an SPI™-compatible interface. A simple command word structure controls channel configuration, data rates, digital I/O, monitor functions, etc.

Programmable sensor bias current sources can be used to bias sensors or verify sensor integrity.

The ADS1258 operates from a unipolar +5V or bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to 5.25V. The ADS1258 is available in a QFN-48 package.

open-in-new Find other Precision ADCs (<=10MSPS)
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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet 16-Channel 24-Bit Analog-to-Digital Converter datasheet (Rev. G) Mar. 28, 2011
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
User guides ADS1158EVM, ADS1258EVM User's Guide (Rev. D) May 14, 2016
White papers Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
Technical articles Delta-sigma ADC basics: Walking around the delta-sigma blocks Mar. 03, 2015
Application notes ADS1258, ADS1258-EP, and ADS1158 SPI™ Timeout Function Apr. 20, 2012
Application notes Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) Apr. 13, 2010
Application notes Conversion latency in delta-sigma converters Jan. 12, 2007

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
Description

ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)

Features

ADCPro software from Texas Instruments will simplify the tasks of collecting and analyzing ADC data, and ease evaluation. With it, you can easily set up an evaluation system that may not exactly replicate the manufacturer's system, but still arrive at meaningful results that can be compared to (...)

EVALUATION BOARDS Download
document-generic User guide
Description

For use with a personal computer, the ADS1258EVM-PDK is available. This kit combines the ADS1258EVM board with the DSP-based MMB0 motherboard, and includes ADCPro™ software for evaluation. The MMB0 mother board allows the ADS1258EVM to be connected to the computer via an available USB port (...)

Features
  • Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
  • Data collection to ASCII text files
  • Built-in analysis tools including scope, FFT, and histogram displays
  • Complete control of board settings
  • Easily expandable with new analysis plug-in tools from Texas Instruments

Software development

IDES, CONFIGURATION, COMPILERS & DEBUGGERS Download
DCPFREETOOL Software Plug-In to Code Composer Studio
DCPFREETOOL The data converter support plug-in is a free tool, which allows the user of Code Composer Studio™ to create initialization data and configuration software for Texas Instruments data converters based on inputs on a graphical user interface.

IMPORTANT: Please read the following before downloading the (...)

Features

The data converter support plug-in (DCP) is a component of TI's Code Composer Studio™ and offers easy-to-use windows for the "point-and-click" configuration of TI's data converters from within the integrated development environment (IDE), preventing illegal combinations of settings. The DCP (...)

SUPPORT SOFTWARE Download
SBAC222A.ZIP (59 KB)

Design tools & simulation

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
  • (...)

CAD/CAE symbols

Package Pins Download
VQFN (RTC) 48 View options

Ordering & quality

Support & training

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