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  • 用于生物电势测量的 ADS129x 低功耗、双通道、24 位模拟前端

    • ZHCS146C December   2011  – April 2020 ADS1291 , ADS1292 , ADS1292R

      PRODUCTION DATA.  

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  • 用于生物电势测量的 ADS129x 低功耗、双通道、24 位模拟前端
  1. 1 特性
  2. 2 应用
    1.     简化框图
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Noise Measurements
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  EMI Filter
      2. 8.3.2  Input Multiplexer
        1. 8.3.2.1 Device Noise Measurements
        2. 8.3.2.2 Test Signals (TestP and TestN)
        3. 8.3.2.3 Auxiliary Differential Input (RESP_MODN/IN3N, RESP_MODN/IN3P)
        4. 8.3.2.4 Temperature Sensor (TEMPP, TEMPN)
        5. 8.3.2.5 Supply Measurements (MVDDP, MVDDN)
        6. 8.3.2.6 Lead-Off Excitation Signals (LoffP, LoffN)
        7. 8.3.2.7 Auxiliary Single-Ended Input
      3. 8.3.3  Analog Input
      4. 8.3.4  PGA Settings and Input Range
        1. 8.3.4.1 Input Common-Mode Range
        2. 8.3.4.2 Input Differential Dynamic Range
        3. 8.3.4.3 ADC ΔΣ Modulator
      5. 8.3.5  Digital Decimation Filter
        1. 8.3.5.1 Sinc Filter Stage (sinx / x)
      6. 8.3.6  Reference
      7. 8.3.7  Clock
      8. 8.3.8  Data Format
      9. 8.3.9  Multiple Device Configuration
        1. 8.3.9.1 Standard Mode
      10. 8.3.10 ECG-Specific Functions
        1. 8.3.10.1 Input Multiplexer (Rerouting the Right Leg Drive Signal)
          1. 8.3.10.1.1 Input Multiplexer (Measuring the Right Leg Drive Signal)
        2. 8.3.10.2 Lead-Off Detection
          1. 8.3.10.2.1 DC Lead-Off
          2. 8.3.10.2.2 AC Lead-Off
          3. 8.3.10.2.3 RLD Lead-Off
          4. 8.3.10.2.4 Right Leg Drive (RLD DC Bias Circuit)
            1. 8.3.10.2.4.1 RLD Configuration With Multiple Devices
        3. 8.3.10.3 PACE Detect
        4. 8.3.10.4 Respiration
          1. 8.3.10.4.1 Internal Respiration Circuitry With Internal Clock (ADS1292R)
          2. 8.3.10.4.2 Internal Respiration Circuitry With External Clock (ADS1292R)
      11. 8.3.11 Setting the Device for Basic Data Capture
        1. 8.3.11.1 Lead-Off
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 SPI Interface
        1. 8.5.1.1  Chip Select (CS)
        2. 8.5.1.2  Serial Clock (SCLK)
        3. 8.5.1.3  Data Input (DIN)
        4. 8.5.1.4  Data Output (DOUT)
        5. 8.5.1.5  Data Retrieval
        6. 8.5.1.6  Data Ready (DRDY)
        7. 8.5.1.7  GPIO
        8. 8.5.1.8  Power-Down and Reset (PWDN/RESET)
        9. 8.5.1.9  START
        10. 8.5.1.10 Settling Time
        11. 8.5.1.11 Continuous Mode
        12. 8.5.1.12 Single-Shot Mode
      2. 8.5.2 SPI Command Definitions
        1. 8.5.2.1  WAKEUP: Exit STANDBY Mode
        2. 8.5.2.2  STANDBY: Enter STANDBY Mode
        3. 8.5.2.3  RESET: Reset Registers to Default Values
        4. 8.5.2.4  START: Start Conversions
        5. 8.5.2.5  STOP: Stop Conversions
        6. 8.5.2.6  OFFSETCAL: Channel Offset Calibration
        7. 8.5.2.7  RDATAC: Read Data Continuous
        8. 8.5.2.8  SDATAC: Stop Read Data Continuous
        9. 8.5.2.9  RDATA: Read Data
        10. 8.5.2.10 Sending Multi-Byte Commands
        11. 8.5.2.11 RREG: Read From Register
        12. 8.5.2.12 WREG: Write to Register
    6. 8.6 Register Maps
      1. 8.6.1 User Register Description
        1. 8.6.1.1  ID: ID Control Register (Factory-Programmed, Read-Only) (address = 00h)
          1. Table 17. ID: ID Control Register (Factory-Programmed, Read-Only) Field Descriptions
        2. 8.6.1.2  CONFIG1: Configuration Register 1 (address = 01h)
          1. Table 18. CONFIG1: Configuration Register 1 Field Descriptions
        3. 8.6.1.3  CONFIG2: Configuration Register 2 (address = 02h)
          1. Table 19. CONFIG2: Configuration Register 2 Field Descriptions
        4. 8.6.1.4  LOFF: Lead-Off Control Register (address = 03h)
          1. Table 20. LOFF: Lead-Off Control Register Field Descriptions
        5. 8.6.1.5  CH1SET: Channel 1 Settings (address = 04h)
          1. Table 21. CH1SET: Channel 1 Settings Field Descriptions
        6. 8.6.1.6  CH2SET: Channel 2 Settings (address = 05h)
          1. Table 22. CH2SET: Channel 2 Settings Field Descriptions
        7. 8.6.1.7  RLD_SENS: Right Leg Drive Sense Selection (address = 06h)
          1. Table 23. RLD_SENS: Right Leg Drive Sense Selection Field Descriptions
        8. 8.6.1.8  LOFF_SENS: Lead-Off Sense Selection (address = 07h)
          1. Table 24. LOFF_SENS: Lead-Off Sense Selection Field Descriptions
        9. 8.6.1.9  LOFF_STAT: Lead-Off Status (address = 08h)
          1. Table 25. LOFF_STAT: Lead-Off Status Field Descriptions
        10. 8.6.1.10 RESP1: Respiration Control Register 1 (address = 09h)
          1. Table 26. RESP1: Respiration Control Register 1 Field Descriptions
        11. 8.6.1.11 RESP2: Respiration Control Register 2 (address = 0Ah)
          1. Table 27. RESP2: Respiration Control Register 2 Field Descriptions
        12. 8.6.1.12 GPIO: General-Purpose I/O Register (address = 0Bh)
          1. Table 28. GPIO: General-Purpose I/O Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-Up Sequencing
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Layout
        1. 11.1.1.1 Power Supplies and Grounding
          1. 11.1.1.1.1 Connecting the Device to Unipolar (+3 V or +1.8 V) Supplies
          2. 11.1.1.1.2 Connecting the Device to Bipolar (±1.5 V or 1.8 V) Supplies
        2. 11.1.1.2 Shielding Analog Signal Paths
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 相关链接
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 商标
    5. 12.5 静电放电警告
    6. 12.6 Glossary
  13. 13机械、封装和可订购信息
  14. 重要声明
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DATA SHEET

用于生物电势测量的 ADS129x 低功耗、双通道、24 位模拟前端

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • 两个低噪声 PGA 和两个高分辨率 ADC
    （ADS1292 和 ADS1292R）
  • 低功耗：335μW/通道
  • 输入参考噪声：8μVPP
    （150Hz 带宽，G = 6）
  • 输入偏置电流：200pA
  • 数据速率：125SPS 至 8kSPS
  • CMRR：120dB
  • 可编程增益：1、2、3、4、6、8 或 12
  • 电源：单极或者双极
    • 模拟：2.7V 至 5.25V
    • 数字：1.7V 至 3.6V
  • 内置右腿驱动放大器、持续断线检测、测试信号
  • 集成型呼吸阻抗测量 (ADS1292R)
  • 内置振荡器和基准
  • 灵活的断电、待机模式
  • SPI™兼容串行接口
  • 工作温度范围：–40°C 至 +85°C

2 应用

  • 医疗仪器 (ECG) 包括：
    • 患者监护：动态心电图 (Holter)、事件、压力和生命体征，包括心电图、AED 和远程医疗
    • 个人护理和健身监视器
      （心率、呼吸和 ECG）
  • 高精度、同步、多通道数据采集

    • 简化框图

    ADS1291 ADS1292 ADS1292R fbd_sbas502.gif

3 说明

ADS1291、ADS1292 和 ADS1292R 是多通道同步采样 24 位 Δ-Σ 模数转换器 (ADC)，它们具有内置的可编程增益放大器 (PGA)、内部基准和板载振荡器。

ADS1291、ADS1292 和 ADS1292R 包含 便携式 低功耗医疗心电图 (ECG)、体育和健身 应用通常所需的所有功能。

凭借高集成度和出色的性能，ADS1291、ADS1292 和 ADS1292R 可在显著减少尺寸、功耗和总体成本的前提下创建可扩展的医疗仪器系统。

ADS1291、ADS1292 和 ADS1292R 每通道具有灵活的输入多路复用器，此多路复用器可独立连接至内部生成的信号，实现测试、温度和持续断线检测。此外，可选择输入通道的任一配置生成右腿驱动 (RLD) 输出信号。ADS1291、ADS1292 和 ADS1292R 工作时的数据速率高达 8kSPS。通过器件内部激励灌电流或拉电流，可在器件内部执行持续断线检测。ADS1292R 版本包括一个完全集成的呼吸阻抗测量功能。

这些器件采用 5mm × 5mm、32 引脚薄型四方扁平封装 (TQFP) 和 4mm x 4mm、32 引脚无引线四方扁平封装 (VQFN)。额定工作温度范围 –40°C 至 +85°C。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
ADS129x TQFP (32) 5.00mm × 5.00mm
VQFN (32) 4.00mm × 4.00mm
  1. 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

4 修订历史记录

Changes from B Revision (September 2012) to C Revision

  • Added 添加了器件信息 表、ESD 额定值 表、首页图的标题、建议运行条件 表、特性 说明 部分、器件功能模式 部分、应用和实施 部分、电源相关建议 部分、布局 部分、器件和文档支持 部分以及机械、封装和可订购信息 部分Go
  • Changed 将 CMRR 值从 105dB 更改为 120dB（位于特性 部分）Go
  • Changed 更改了应用 部分Go
  • Changed 通篇将 QFN 更改为 VQFNGo
  • Added thermal pad data to RDM pin out package drawing Go
  • Changed Pin Functions title from Pin Assignments, changed Terminal column header to Pin, and corrected format to show both package optionsGo
  • Changed function and description of RESP_MODN/IN3N and RESP_MODP/IN3P pins, changed function of RLDOUT pin from Analog input to Analog output, and added Thermal Pad row to Pin Assignments tableGo
  • Deleted Family and Ordering Information tableGo
  • Changed CMRR parameter values from –105 dB to 105 dB (minimum) and from –120 dB to 120 dB (typical) in Electrical Characteristics tableGo
  • Changed Noise Measurements section: deleted SNR equation, changed DYN RANGE and EFF RESOL column headers in section tablesGo
  • Added last sentence to Internal Respiration Circuitry with External Clock (ADS1292R) sectionGo
  • Changed denominator of equation 10 Go
  • Changed first paragraph of Data Output (DOUT) sectionGo
  • Changed RDATAC Usage figureGo
  • Changed RDATA Usage figureGo
  • Changed ADS1292R Application section to fulfill Typical Application sectionGo

Changes from A Revision (March 2012) to B Revision

  • Added 向器件图形添加了 QFN 封装Go
  • Added QFN pin out drawingGo
  • Changed AVSS to DGND row in Absolute Maximum Ratings tableGo
  • Changed parameters of Supply Current (RLD Amplifier Turned Off) section in Electrical Characteristics tableGo
  • Changed description of bit 6 in LOFF_STATUS: Lead-Off Status registerGo

Changes from * Revision (December 2011) to A Revision

  • Changed 更改了器件图形Go
  • Changed 将器件状态从“混合状态”更改为“生产数据”Go
  • Changed 更改了第二个 “特性” 项目符号Go
  • Updated Family and Ordering Information tableGo
  • Moved ADS1292R to production statusGo
  • Deleted footnote 2 from Family and Ordering Information tableGo
  • Changed values of AVDD to AVSS and DVDD to DGND rows in Absolute Maximum Ratings tableGo
  • Changed Operating temperature range parameter in Absolute Maximum Ratings tableGo
  • Changed DC Channel Performance, INL parameter test conditions in Electrical Characteristics tableGo
  • Changed AC Channel Performance, SNR and THD parameters test conditions in Electrical Characteristics tableGo
  • Added third Channel Performance, THD parameter row to Electrical Characteristics tableGo
  • Added Digital Filter section to Electrical Characteristics tableGo
  • Deleted Right Leg Drive Amplifier, Quiescent power consumption parameter test condition from Electrical Characteristics tableGo
  • Changed Respiration, Impedance measurement noise parameter test conditions in Electrical Characteristics tableGo
  • Changed Respiration, Maximum modulator current parameter in Electrical Characteristics tableGo
  • Changed Power-Supply Requirements, Digital supply parameter in Electrical Characteristics tableGo
  • Changed first IDVDD Supply Current, Normal mode parameter test conditions in Electrical Characteristics tableGo
  • Changed 3-V Power Dissipation, Quiescent power dissipation, per channel parameter typical specifications in Electrical Characteristics tableGo
  • Added CFILTER to Typical Characteristics conditionsGo
  • Updated Figure 5Go
  • Updated Figure 9 and Figure 12Go
  • Changed description of CHnSET setting in Supply Measurements (MVDDP, MVDDN) sectionGo
  • Changed second paragraph of PGA Settings and Input Range sectionGo
  • Changed description of PD_REFBUF bit in the Reference sectionGo
  • Updated second column title in Table 9Go
  • Updated Figure 33Go
  • Updated Figure 42Go
  • Added description of Figure 43, Figure 43, and Table 12 to Internal Respiration Circuitry with External Clock (ADS1292R) sectionGo
  • Updated description of DOUT and DRDY in RDATAC: Read Data Continuous sectionGo
  • Updated RLD_STAT in address 08h of Table 16Go
  • Changed description of bit 1 in CONFIG2: Configuration Register 2Go
  • Changed descriptions of bits[3:0] in CH2SET: Channel 2 SettingsGo
  • Updated Figure 70 and Figure 71Go
  • Updated Figure 73 and added footnote 1Go
  • Updated Figure 74 and added footnote 1Go

 
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