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類比轉數位轉換器 (ADC)
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ADS1258

現行

具有快速通道掃描和自動串聯器的 24 位元 125kSPS 16 通道 delta-sigma ADC

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產品規格表

ADS1258

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 125 Number of input channels 16 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.85, 5.35 Input voltage range (min) (V) -2.7, 0 Features GPIO, Oscillator Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 42 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 125 Number of input channels 16 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.85, 5.35 Input voltage range (min) (V) -2.7, 0 Features GPIO, Oscillator Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 42 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
VQFNP (RTC) 48 49 mm² (7 mm × 7 mm)
  • 24 Bits, No Missing Codes
  • Fixed-Channel or Automatic Channel Scan
  • Fixed-Channel Data Rate: 125kSPS
  • Auto-Scan Data Rate: 23.7kSPS/Channel
  • Single-Conversion Settled Data
  • 16 Single-Ended or 8 Differential Inputs
  • Unipolar (+5V) or Bipolar (±2.5V) Operation
  • Low Noise: 2.8µVRMS at 1.8kSPS
  • 0.0003% Integral Nonlinearity
  • DC Stability (typical):
    0.02µV/°C Offset Drift, 0.4ppm/°C Gain Drift
  • Open-Sensor Detection
  • Conversion Control Pin
  • Multiplexer Output for External Signal Conditioning
  • On-Chip Temperature, Reference, Offset, Gain, and Supply Voltage Readback
  • 42mW Power Dissipation
  • Standby, Sleep, and Power-Down Modes
  • 8 General-Purpose Inputs/Outputs (GPIO)
  • 32.768kHz Crystal Oscillator or External Clock
  • APPLICATIONS
    • Medical, Avionics, and Process Control
    • Machine and System Monitoring
    • Fast Scan Multi-Channel Instrumentation
    • Industrial Systems
    • Test and Measurement Systems

SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.
  • 24 Bits, No Missing Codes
  • Fixed-Channel or Automatic Channel Scan
  • Fixed-Channel Data Rate: 125kSPS
  • Auto-Scan Data Rate: 23.7kSPS/Channel
  • Single-Conversion Settled Data
  • 16 Single-Ended or 8 Differential Inputs
  • Unipolar (+5V) or Bipolar (±2.5V) Operation
  • Low Noise: 2.8µVRMS at 1.8kSPS
  • 0.0003% Integral Nonlinearity
  • DC Stability (typical):
    0.02µV/°C Offset Drift, 0.4ppm/°C Gain Drift
  • Open-Sensor Detection
  • Conversion Control Pin
  • Multiplexer Output for External Signal Conditioning
  • On-Chip Temperature, Reference, Offset, Gain, and Supply Voltage Readback
  • 42mW Power Dissipation
  • Standby, Sleep, and Power-Down Modes
  • 8 General-Purpose Inputs/Outputs (GPIO)
  • 32.768kHz Crystal Oscillator or External Clock
  • APPLICATIONS
    • Medical, Avionics, and Process Control
    • Machine and System Monitoring
    • Fast Scan Multi-Channel Instrumentation
    • Industrial Systems
    • Test and Measurement Systems

SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.

The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma () analog-to-digital converter (ADC) that provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second (SPS) per channel. A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5V or true bipolar range of ±2.5V when operating with a 5V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.

The differential output of the multiplexer is accessible to allow signal conditioning prior to the input of the ADC. Internal system monitor registers provide supply voltage, temperature, reference voltage, gain, and offset data.

An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an external clock source. A buffered system clock output (15.7MHz) is provided to drive a microcontroller or additional converters.

Serial digital communication is handled via an SPI™-compatible interface. A simple command word structure controls channel configuration, data rates, digital I/O, monitor functions, etc.

Programmable sensor bias current sources can be used to bias sensors or verify sensor integrity.

The ADS1258 operates from a unipolar +5V or bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to 5.25V. The ADS1258 is available in a QFN-48 package.

The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma () analog-to-digital converter (ADC) that provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second (SPS) per channel. A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5V or true bipolar range of ±2.5V when operating with a 5V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.

The differential output of the multiplexer is accessible to allow signal conditioning prior to the input of the ADC. Internal system monitor registers provide supply voltage, temperature, reference voltage, gain, and offset data.

An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an external clock source. A buffered system clock output (15.7MHz) is provided to drive a microcontroller or additional converters.

Serial digital communication is handled via an SPI™-compatible interface. A simple command word structure controls channel configuration, data rates, digital I/O, monitor functions, etc.

Programmable sensor bias current sources can be used to bias sensors or verify sensor integrity.

The ADS1258 operates from a unipolar +5V or bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to 5.25V. The ADS1258 is available in a QFN-48 package.
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技術文件

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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 16-Channel 24-Bit Analog-to-Digital Converter datasheet (Rev. G) 2011/3/28
應用說明 Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 2024/3/18
應用說明 A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 2024/3/13
應用說明 QFN and SON PCB Attachment (Rev. C) PDF | HTML 2023/12/6
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
應用說明 ADS1258, ADS1258-EP, and ADS1158 SPI™ Timeout Function 2012/4/20
應用說明 Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) 2010/4/13
類比設計期刊 Conversion latency in delta-sigma converters 2007/1/12

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)。

開發套件

ADS1258EVM-PDK — ADS1258 性能展示套件

ADS1258 評估模組 (EVM) 性能展示套件 (PDK) 的功能可當做評估 ADS1258 類比轉數位轉換器 (ADC) 的平台。ADS1258 為一款適合速度更快，通道數多的工業應用的 125 kSPS、16 通道、24 位元 Delta Sigma ADC。

PDK 內含 ADS1258EVM，精密主機介面 (PHI) 控制器電路板，以及隨附的電腦軟體，可讓使用者透過通用序列匯流排 (USB) 與 ADC 通訊、擷取資料，以及執行資料分析。

使用指南: PDF | HTML
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支援軟體

ADS1258-C-EXAMPLE-CODE — ADS1258 Example C Code

Expedite your embedded design using this example C code for the ADS1258
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模擬型號

ADS1158, ADS1258 and ADS1258-EP IBIS Model

SBAM124.ZIP (77 KB) - IBIS 模型
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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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VQFNP (RTC) 48 Ultra Librarian
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