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ADS1278-SP

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

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Data sheet

ADS1278-SP

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 128 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Space Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable Operating temperature range (°C) 25 to 25 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) 2.2
Resolution (Bits) 24 Sample rate (max) (ksps) 128 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Simultaneous Sampling Rating Space Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable Operating temperature range (°C) 25 to 25 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) 2.2
CFP (HFQ) 84 190.44 mm² 13.8 x 13.8
  • 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
  • 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

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.

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.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet ADS1278-SP Radiation Hardened 8-Ch Simultaneous-Sampling 24-Bit Analog-to-Digital Converter datasheet (Rev. B) PDF | HTML 27 Dec 2018
* Radiation & reliability report ADS1278-SP Production Flow and Reliability Report PDF | HTML 08 Jul 2022
* Radiation & reliability report ADS1278-SP Total Ionizing Dose (TID) HDR (Rev. A) 01 Aug 2019
* Radiation & reliability report Single-Event Effects Test Report of the ADS1278-SP Octal, 24-Bit ADC 10 Oct 2018
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 17 Jun 2025
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 10 Jun 2025
Selection guide TI Space Products (Rev. K) 04 Apr 2025
Application brief ADS1278-SP Power-On Reset Procedure PDF | HTML 25 Mar 2025
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 20 Feb 2025
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19 Oct 2022
Application brief Analog Front-End Design With Texas Instruments’ Tooling Landscape PDF | HTML 07 Mar 2022
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 Jun 2020

Design & development

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Simulation model

ADS1278-SP IBIS Model

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