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Präzisions-ADCs

ADS1278-HT

AKTIV

24-Bit-Analog-Digital-Wandler für Hochtemperatur-Vierfach-/Oktalabtastung

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Datenblatt

ADS1278-HT

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

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
CFP (HFQ) 84 190.44 mm² 13.8 x 13.8 CFP (HKP) 84 190.7161 mm² 13.81 x 13.81 DIESALE (KGD) — See data sheet HTQFP (PAP) 64 144 mm² 12 x 12
  • 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.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converter datasheet (Rev. E) 11 Apr 2013
* Radiation & reliability report ADS1278SHFQ Reliability Report 07 Mai 2012
* Radiation & reliability report ADS1278SHKP Reliability Report 07 Mai 2012
Application brief ADS1278-SP Power-On Reset Procedure PDF | HTML 25 Mär 2025
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mär 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 Jun 2020
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mär 2015

Design und Entwicklung

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CFP (HKP) 84 Ultra Librarian
DIESALE (KGD) —
HTQFP (PAP) 64 Ultra Librarian
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