ADS1259

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24-bit, 14.4kSPS, 1-ch delta-sigma ADC with low-drift voltage reference for factory automation

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 14.4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Rating Catalog Reference mode Ext, Int Input range (Max) (V) 2.75, 5.35 Input range (Min) (V) -2.7, 0 Features 50/60 Hz Rejection, Oscillator Operating temperature range (C) -40 to 105 Power consumption (Typ) (mW) 13 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

TSSOP (PW) 20 42 mm² 6.5 x 6.4 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 24 Bits, No Missing Codes
  • Output Data Rates From 10 To 14kSPS
  • High Performance:
    • INL: 0.4ppm
    • Reference Drift: 2ppm/°C
    • Gain Drift: 0.5ppm/°C
    • Offset Drift: 0.05µV/°C
    • Noise: 0.7µVRMS at 60SPS
  • Simultaneous 50/60Hz Rejection at 10SPS
  • Single-Cycle Settling
  • Internal Oscillator
  • Out-of-Range Detection
  • Readback Data Integrity by Checksum and Redundant Data Read Capability
  • SPI-Compatible Interface
  • Analog Supply: +5V or ±2.5V
  • Digital Supply: +2.7V to +5V
  • Low Power: 13mW
  • APPLICATIONS
    • Industrial Process Control
    • Scientific Instrumentation
    • Test and Measurement

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Description

The ADS1259 is a high-linearity, low-drift, 24-bit, analog-to-digital converter (ADC) designed for the needs of industrial process control, precision instrumentation, and other exacting applications. Combined with a signal amplifier (such as the PGA280), a high-resolution, high-accuracy measurement system is formed that is capable of digitizing a wide range of signals.

The converter uses a fourth-order, inherently stable, delta-sigma (ΔΣ) modulator that provides outstanding noise and linearity performance. The data rates are programmable up to 14kSPS including 10SPS, 50SPS, and 60SPS that provide excellent normal mode line-cycle rejection. The digital filter can be programmed for a fast settling mode where the conversions settle in a single cycle, or programmed for a high line-cycle rejection mode. A fast responding input over-range detector flags the conversion data if an input over-range should occur.

The ADS1259 also provides an integrated low-noise, very low drift 2.5V reference. The on-chip oscillator, an external crystal, or an external clock can by used as the ADC clock source.

Data and control communication are handled over a 4MHz, SPI-compatible interface capable of operating with a minimum of three wires. Data integrity is augmented by data bytes checksum and redundant data read capability. Conversions are synchronized either by command or by pin.

Dissipating only 13mW in operation, the ADS1259 can be powered down, dissipating less than 25µW. The ADS1259 is offered in a TSSOP-20 package and is fully specified from –40°C to +105°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet Industrial, 14kSPS, 24-Bit Analog-to-Digital Converter with Low-Drift Reference datasheet (Rev. D) Aug. 26, 2011
White papers Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
Application notes Communication Methods for Data Integrity Using Delta-Sigma Data Converters Jun. 01, 2020
Application notes Enabling precision delta‐sigma ADCs in functional safety applications Mar. 19, 2020
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
User guides ADS1259EVM and ADS1259EVM-PDK User's Guide (Rev. B) May 14, 2016
Technical articles The impact of voltage reference noise on delta-sigma ADC resolution Dec. 11, 2015
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

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 (...)

GUIS FOR EVALUATION MODULES (EVM) Download
document-generic User guide
Description

The ADS1259EVM-PDK is a complete evaluation/demonstration kit, which combines the ADS1259EVM with the DSP based MMB0 motherboard. The motherboard and ADCPro™ evaluation software are supplied for use with a personal computer via an available USB port. The combination of boards allows the (...)

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

Design tools & simulation

SIMULATION MODELS Download
SBAM018.ZIP (112 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
  • (...)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 20 View options

Ordering & quality

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