Home Data converters Analog-to-digital converters (ADCs) Precision ADCs
Home
Data converters
Analog-to-digital converters (ADCs)
Precision ADCs

ADS1278-HT

ACTIVE

High-Temperature Quad/Octal, Simultaneous-Sampling, 24-Bit Analog-to-Digital Converter

Order now
Data sheet

ADS1278-HT

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 144 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating High Temp Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable Operating temperature range (°C) -55 to 210 Power consumption (typ) (mW) 530 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 111 Digital supply (min) (V) 1.65 Digital supply (max) (V) 1.95
Resolution (Bits) 24 Sample rate (max) (ksps) 144 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating High Temp Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable Operating temperature range (°C) -55 to 210 Power consumption (typ) (mW) 530 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 111 Digital supply (min) (V) 1.65 Digital supply (max) (V) 1.95
HTQFP (PAP) 64 144 mm² (12 mm × 12 mm) DIESALE (KGD) — See data sheet CFP (HKP) 84 190.7161 mm² (— mm × — mm) CFP (HFQ) 84 190.44 mm² (— mm × — mm)
  • Simultaneously Measure Eight Channels
  • Up to 128-kSPS Data Rate
  • AC Performance:
    62-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
  • Currently Available in an HTQFP-64 PowerPAD™ package,
    an 84-Pin HFQ Package and a KGD Chiptray Option
  • Supports Extreme Temperature Applications
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Extreme (–55°C/210°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
    • Texas Instruments High Temperature Products Utilize Highly
      Optimized Silicon (Die) Solutions With Dsign and Process
      Enhancements to Maximize Performance Over Extended Temperatures
  • APPLICATIONS
    • Down-Hole Drilling
    • High Temperature Environments
    • Vibration/Modal Analysis
    • Multi-Channel Data Acquisition
    • Acoustics/Dynamic Strain Gauges
    • Pressure Sensors

(1) Custom temperature ranges available
All other trademarks are the property of their respective owners
  • Simultaneously Measure Eight Channels
  • Up to 128-kSPS Data Rate
  • AC Performance:
    62-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
  • Currently Available in an HTQFP-64 PowerPAD™ package,
    an 84-Pin HFQ Package and a KGD Chiptray Option
  • Supports Extreme Temperature Applications
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Extreme (–55°C/210°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
    • Texas Instruments High Temperature Products Utilize Highly
      Optimized Silicon (Die) Solutions With Dsign and Process
      Enhancements to Maximize Performance Over Extended Temperatures
  • APPLICATIONS
    • Down-Hole Drilling
    • High Temperature Environments
    • Vibration/Modal Analysis
    • Multi-Channel Data Acquisition
    • Acoustics/Dynamic Strain Gauges
    • Pressure Sensors

(1) Custom temperature ranges available
All other trademarks are the property of their respective owners

Based on the single-channel ADS1271, the ADS1278 (octal) is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with data rates up to 128 k 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 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 industrial range (–55°C to 210°C) and is available in an HTQFP-64 PowerPAD package (–55°C to 175°C), an 84-pin HFQ package and a KGD chiptray option.

Based on the single-channel ADS1271, the ADS1278 (octal) is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with data rates up to 128 k 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 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 industrial range (–55°C to 210°C) and is available in an HTQFP-64 PowerPAD package (–55°C to 175°C), an 84-pin HFQ package and a KGD chiptray option.
filter Find other Precision ADCs
Download View video with transcript Video

Technical documentation

No results found. Please clear your search and try again.
View all 7
Top documentation Type Title Format options Date
* Data sheet Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converter datasheet (Rev. E) Apr 11, 2013
* Radiation & reliability report ADS1278SHKP Reliability Report May 7, 2012
* Radiation & reliability report ADS1278SHFQ Reliability Report May 7, 2012
Application brief ADS1278QML-SP Power-On Reset Procedure (Rev. A) PDF | HTML Jul 10, 2026
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 29, 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) Jun 19, 2020
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar 19, 2015

Design & development

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

GUI for evaluation module (EVM)

SLAC498 — HEATEVM GUI Software

Supported products & hardware
Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

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 operational-amplifier (...)

Supported products & hardware
Design tool

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
Supported products & hardware
Reference design

TIDA-00002 — Harsh Environment Acquisition Terminal (HEAT) EVM Platform for High Temperature Applications

The HEATEVM is a MCM intended to provide a high temperature platform for signal conditioning and processor evaluation. The module consists of a complete chain of components designed to withstand extreme operating temperatures up to 200 °C. The PCB is made with polymide material also suited for (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
HTQFP (PAP) 64 Ultra Librarian
DIESALE (KGD) — Ultra Librarian
CFP (HKP) 84 Ultra Librarian
CFP (HFQ) 84 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos