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ADS1218

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具有闪存、8 个通道、基准电压、缓冲器、2 个 IDAC、串行输出、数字 I/O 和低功耗的 24 位 780SPS ADC

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ADS124S08 正在供货 适用于传感器测量且具有 PGA 和电压基准的 24 位、4kSPS、12 通道 Δ-Σ ADC More analog inputs (12), faster sample rate (4 kSPS)

ADS1218

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产品详情

Resolution (Bits) 24 Sample rate (max) (ksps) 0.78 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.8 Analog supply voltage (min) (V) 2.7 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) 0.78 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.8 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
TQFP (PFB) 48 81 mm² (9 mm × 9 mm)
  • 24 BITS NO MISSING CODES
  • 0.0015% INL
  • 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
  • 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V
  • PGA FROM 1 TO 128
  • SINGLE CYCLE SETTLING MODE
  • PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
  • PRECISION ON-CHIP 1.25V/2.5V REFERENCE:
    ACCURACY: 0.2%
    DRIFT: 5ppm/°C
  • EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V
  • ON-CHIP CALIBRATION
  • PIN-COMPATIBLE WITH ADS1216
  • SPI™ COMPATIBLE
  • 2.7V TO 5.25V
  • < 1mW POWER CONSUMPTION
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS
    • SMART TRANSMITTERS
    • PORTABLE INSTRUMENTATION
    • WEIGHT SCALES
    • PRESSURE TRANSDUCERS

SPI is a trademark of Motorola.
All trademarks are the property of their respective owners.
  • 24 BITS NO MISSING CODES
  • 0.0015% INL
  • 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
  • 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V
  • PGA FROM 1 TO 128
  • SINGLE CYCLE SETTLING MODE
  • PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
  • PRECISION ON-CHIP 1.25V/2.5V REFERENCE:
    ACCURACY: 0.2%
    DRIFT: 5ppm/°C
  • EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V
  • ON-CHIP CALIBRATION
  • PIN-COMPATIBLE WITH ADS1216
  • SPI™ COMPATIBLE
  • 2.7V TO 5.25V
  • < 1mW POWER CONSUMPTION
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS
    • SMART TRANSMITTERS
    • PORTABLE INSTRUMENTATION
    • WEIGHT SCALES
    • PRESSURE TRANSDUCERS

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

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.

The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor.

The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.

The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor.

The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 8-Channel, 24-Bit, Analog-to-Digital Converter with FLASH Memory 数据表 (Rev. C) 2005-9-26
应用手册 计算 Δ-Σ ADC 的转换延迟和系统周期时间 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2024-3-27
应用手册 Δ-Σ ADC 中的数字滤波器类型 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-13
电子书 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020-6-19
应用手册 Measuring Temperature with the ADS1216, ADS1217, or ADS1218 (Rev. B) 2017-11-16
应用手册 Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 2015-5-18
应用手册 The Offset DAC (Rev. A) 2015-4-1
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19
应用手册 Calibration Routines and Register Value Generation for the ADS121x Series 2003-6-19
应用手册 Inputs Currents for High-Resolution ADCs 2003-3-6

设计与开发

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计算工具

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

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

支持的产品和硬件
设计工具

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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封装 引脚 CAD 符号、封装和 3D 模型
TQFP (PFB) 48 Ultra Librarian
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如果您对质量、包装或订购 TI 产品有疑问，请参阅 TI 支持。​​​​​​​​​​​​​​

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