ADS1278-SP

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Radiation Hardened 24-Bit 8-Ch Simultaneous-Sampling Delta-Sigma ADC

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 8 Sample rate (Max) (kSPS) 128 Interface type SPI Architecture Delta-Sigma Input type Differential Multi-channel configuration Simultaneous Sampling Rating Space Reference mode Ext Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features Daisy-Chainable Operating temperature range (C) -55 to 115, -55 to 125, 25 to 25 Power consumption (Typ) (mW) 530 Analog voltage AVDD (Min) (V) 4.75 SNR (dB) 111 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 201.4 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 2.2 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

CFP (TBAR) (HFQ) 84 190 mm² 13.8 x 13.8 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Radiation Hardened
    • TID 75 krad(Si)
    • TID Radiation Lot Acceptance Test (RLAT) TBD
    • Single Event Latchup (SEL) Immune to LET 68 MeV-cm2/mg @ 125°C
  • Simultaneously Samples Eight Channels
  • Up to 128-kSPS Data Rate
  • AC Performance:
    • 63-kHz Bandwidth
    • 111-dB SNR (High-Resolution Mode)
    • –108-dB THD
  • DC Accuracy:
    • 0.8-µV/°C Offset Drift
    • 1.3-ppm/°C Gain Drift
  • Selectable Operating Modes:
    • High-Speed: 128 kSPS, 106-dB SNR
    • High-Resolution: 52 kSPS, 111-dB SNR
    • Low-Power: 52 kSPS, 31 mW/ch
    • Low-Speed: 10 kSPS, 7 mW/ch
  • Linear Phase Digital Filter
  • SPI™ or Frame-Sync Serial Interface
  • Low Sampling Aperture Error
  • Modulator Output Option (Digital Filter Bypass)
  • Analog Supply: 5 V
  • Digital Core: 1.8 V
  • I/O Supply: 1.8 V to 3.3 V

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

Description

The ADS1278-SP (octal) is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with data rates up to 128k samples per second (SPS), allowing simultaneous sampling of eight channels.

Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than respective industrial counterparts. The ADS1278-SP combines these types of converters, allowing high-precision industrial measurement with excellent dc and ac specifications.

The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. These ADCs provide a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005 dB of ripple.

Four operating modes allow for optimization of speed, resolution, and power. All operations are controlled directly by pins; there are no registers to program. The device is fully specified over the extended temperature range of –55°C to 125°C and is available in an 84-pin HFQ package.

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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet ADS1278-SP Radiation Hardened 8-Ch Simultaneous-Sampling 24-Bit Analog-to-Digital Converter datasheet (Rev. B) Dec. 27, 2018
* Radiation & reliability report ADS1278-SP Total Ionizing Dose (TID) HDR (Rev. A) Aug. 01, 2019
* Radiation & reliability report Single-Event Effects Test Report of the ADS1278-SP Octal, 24-Bit ADC Oct. 10, 2018
E-book Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations May 18, 2020
Application note Single-Event Effects Confidence Interval Calculations Jan. 14, 2020
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing Jun. 17, 2019
Selection guide TI Space Products (Rev. G) May 15, 2019
User guide ADS1278EVM-CVAL Evaluation Module User's Guide Sep. 12, 2018
Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017

Design & development

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

Hardware development

EVALUATION BOARD 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 BOARD Download
document-generic User guide
3499
Description
The ADS1278EVM-CVAL kit is a complete evaluation/demonstration kit, which combines ADS1278EVM-CVAL with the DSP-based MMB0 board as a motherboard. The mother board and the ADCPro™ evaluation software are supplied for use with a personal computer running Microsoft™ Windows operating (...)
Features
  • Easy-to-use evaluation software for Microsoft™ Windows 7 and Windows 10
  • 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

Software development

SUPPORT SOFTWARE Download
SBAC211.ZIP (5001 KB)

Design tools & simulation

SIMULATION MODEL Download
SCAM065.ZIP (46 KB) - IBIS Model
SIMULATION TOOL 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 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 (...)
document-generic User guide
CALCULATION TOOL 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 TOOL Download
ADS1x7x Excel™ Calculator Tool
ADS1X7X-EXCEL-CALC-TOOL
    The ADS1x7x Excel calculator tool provides the user with several easy-to-use tools to simplify the configuration of ADS1x7x devices. The tool helps the user understand different settings and operating modes that aid in optimizing a design with ADS1x7x wide-bandwidth analog-to-digital converters (...)
Features
  • ADC code conversions
  • Digital filter plot
  • Daisy-chain configuration
  • SNR estimator
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
  • (...)

CAD/CAE symbols

Package Pins Download
CFP (HFQ) 84 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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