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類比轉數位轉換器 (ADC)
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ADS1278-EP

現行

強化型產品八 144kHz、同步取樣 24 位元 ΔΣ ADC

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產品規格表

ADS1278-EP

現行
產品規格表 立即訂購

產品詳細資料

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 HiRel Enhanced Product 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 125 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 HiRel Enhanced Product 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 125 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)
  • 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

SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS

  • Controlled Baseline
  • One Assembly/Test Site
  • One Fabrication Site
  • Available in Military (–55°C/125°C) Temperature Range(1)
  • Extended Product Life Cycle
  • Extended Product-Change Notification
  • Product Traceability
  • 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

SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS

  • Controlled Baseline
  • One Assembly/Test Site
  • One Fabrication Site
  • Available in Military (–55°C/125°C) Temperature Range(1)
  • Extended Product Life Cycle
  • Extended Product-Change Notification
  • Product Traceability

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 military temperature range (–55°C to 125°C) and is available in an HTQFP-64 PowerPAD package.

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 military temperature range (–55°C to 125°C) and is available in an HTQFP-64 PowerPAD package.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 Octal Simultaneous-Sampling 24-Bit Analog-to-Digital Converter datasheet 2012/9/27
* 輻射及可靠性報告 ADS1278MPAPTEP Reliability Report 2014/12/22
* VID ADS1278-EP VID V6212600 2016/6/21
Application brief ADS1278QML-SP Power-On Reset Procedure (Rev. A) PDF | HTML 2026/7/10
應用說明 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19
電子書 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015/3/19

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

ADS1278EVM-PDK — ADS1278 評估模組

ADS1278EVM-PDK 為評估 ADS1278 性能的平台，而 ADS1278 是 24 位元、8 通道同時取樣 ΔΣ 類比數位轉換器 (ADC)。評估套件包含 ADS1278EVM 電路板和精密主機介面 (PHI) 控制器電路板，可讓隨附的電腦軟體透過 USB 與 ADC 通訊，以進行資料擷取與分析。
使用指南: PDF | HTML
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計算工具

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

類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。

除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。

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設計工具

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.
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HTQFP (PAP) 64 Ultra Librarian
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