SBAS459K January   2010  – August 2015 ADS1294 , ADS1294R , ADS1296 , ADS1296R , ADS1298 , ADS1298R

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements: Serial Interface
    7. 7.7 Switching Characteristics: Serial Interface
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Noise Measurements
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Analog Functionality
        1. 9.3.1.1 EMI Filter
        2. 9.3.1.2 Analog Input Structure
        3. 9.3.1.3 Input Multiplexer
          1. 9.3.1.3.1 Device Noise Measurements
          2. 9.3.1.3.2 Test Signals (TestP and TestN)
          3. 9.3.1.3.3 Auxiliary Differential Input (TESTP_PACE_OUT1, TESTN_PACE_OUT2)
          4. 9.3.1.3.4 Temperature Sensor (TempP, TempN)
          5. 9.3.1.3.5 Supply Measurements (MVDDP, MVDDN)
          6. 9.3.1.3.6 Lead-Off Excitation Signals (LoffP, LoffN)
          7. 9.3.1.3.7 Auxiliary Single-Ended Input
        4. 9.3.1.4 Analog Input
        5. 9.3.1.5 PGA Settings and Input Range
          1. 9.3.1.5.1 Input Common-Mode Range
          2. 9.3.1.5.2 Input Differential Dynamic Range
          3. 9.3.1.5.3 ADC Delta-Sigma Modulator
        6. 9.3.1.6 Reference
        7. 9.3.1.7 ECG-Specific Functions
          1. 9.3.1.7.1 Input Multiplexer (Rerouting The Right Leg Drive Signal)
          2. 9.3.1.7.2 Input Multiplexer (Measuring The Right Leg Drive Signal)
          3. 9.3.1.7.3 Wilson Central Terminal (WCT) and Chest Leads
            1. 9.3.1.7.3.1 Augmented Leads
            2. 9.3.1.7.3.2 Right Leg Drive with the WCT Point
          4. 9.3.1.7.4 Lead-Off Detection
            1. 9.3.1.7.4.1 DC Lead-Off
            2. 9.3.1.7.4.2 AC Lead-Off
          5. 9.3.1.7.5 RLD Lead-Off
          6. 9.3.1.7.6 Right Leg Drive (RLD) DC Bias Circuit
            1. 9.3.1.7.6.1 WCT as RLD
            2. 9.3.1.7.6.2 RLD Configuration with Multiple Devices
          7. 9.3.1.7.7 Pace Detect
            1. 9.3.1.7.7.1 Software Approach
            2. 9.3.1.7.7.2 External Hardware Approach
          8. 9.3.1.7.8 Respiration
            1. 9.3.1.7.8.1 External Respiration Circuitry (RESP_CTRL = 01b)
            2. 9.3.1.7.8.2 Internal Respiration Circuitry with Internal Clock (RESP_CTRL = 10b, ADS129xR Only)
            3. 9.3.1.7.8.3 Internal Respiration Circuitry With User-Generated Signals (RESP_CTRL = 11b, ADS129xR Only)
      2. 9.3.2 Digital Functionality
        1. 9.3.2.1 GPIO Pins (GPIO[4:1])
        2. 9.3.2.2 Power-Down Pin (PWDN)
        3. 9.3.2.3 Reset (RESET Pin and Reset Command)
        4. 9.3.2.4 Digital Decimation Filter
          1. 9.3.2.4.1 Sinc Filter Stage (sinx / x)
        5. 9.3.2.5 Clock
    4. 9.4 Device Functional Modes
      1. 9.4.1 Data Acquisition
        1. 9.4.1.1 Start Mode
          1. 9.4.1.1.1 Settling Time
        2. 9.4.1.2 Data Ready Pin (DRDY)
        3. 9.4.1.3 Data Retrieval
          1. 9.4.1.3.1 Status Word
          2. 9.4.1.3.2 Readback Length
          3. 9.4.1.3.3 Data Format
        4. 9.4.1.4 Single-Shot Mode
        5. 9.4.1.5 Continuous Conversion Mode
      2. 9.4.2 Multiple-Device Configuration
        1. 9.4.2.1 Cascade Configuration
        2. 9.4.2.2 Daisy-Chain Configuration
    5. 9.5 Programming
      1. 9.5.1 SPI Interface
        1. 9.5.1.1 Chip Select Pin (CS)
        2. 9.5.1.2 Serial Clock (SCLK)
          1. 9.5.1.2.1 SCLK Clocking Methods
        3. 9.5.1.3 Data Input Pin (DIN)
        4. 9.5.1.4 Data Output Pin (DOUT)
      2. 9.5.2 SPI Command Definitions
        1. 9.5.2.1  WAKEUP: Exit Standby Mode
        2. 9.5.2.2  STANDBY: Enter Standby Mode
        3. 9.5.2.3  RESET: Reset Registers to Default Values
        4. 9.5.2.4  START: Start Conversions
        5. 9.5.2.5  STOP: Stop Conversions
        6. 9.5.2.6  RDATAC: Read Data Continuous
        7. 9.5.2.7  SDATAC: Stop Read Data Continuous
        8. 9.5.2.8  RDATA: Read Data
        9. 9.5.2.9  Sending Multibyte Commands
        10. 9.5.2.10 RREG: Read From Register
        11. 9.5.2.11 WREG: Write to Register
    6. 9.6 Register Maps
      1. 9.6.1 Register Descriptions
        1. 9.6.1.1  ID: ID Control Register (address = 00h) (reset = xxh)
        2. 9.6.1.2  CONFIG1: Configuration Register 1 (address = 01h) (reset = 06h)
        3. 9.6.1.3  CONFIG2: Configuration Register 2 (address = 02h) (reset = 40h)
        4. 9.6.1.4  CONFIG3: Configuration Register 3 (address = 03h) (reset = 40h)
        5. 9.6.1.5  LOFF: Lead-Off Control Register (address = 04h) (reset = 00h)
        6. 9.6.1.6  CHnSET: Individual Channel Settings (n = 1 to 8) (address = 05h to 0Ch) (reset = 00h)
        7. 9.6.1.7  RLD_SENSP: RLD Positive Signal Derivation Register (address = 0Dh) (reset = 00h)
        8. 9.6.1.8  RLD_SENSN: RLD Negative Signal Derivation Register (address = 0Eh) (reset = 00h)
        9. 9.6.1.9  LOFF_SENSP: Positive Signal Lead-Off Detection Register (address = 0Fh) (reset = 00h)
        10. 9.6.1.10 LOFF_SENSN: Negative Signal Lead-Off Detection Register (address = 10h) (reset = 00h)
        11. 9.6.1.11 LOFF_FLIP: Lead-Off Flip Register (address = 11h) (reset = 00h)
        12. 9.6.1.12 LOFF_STATP: Lead-Off Positive Signal Status Register (address = 12h) (reset = 00h)
        13. 9.6.1.13 LOFF_STATN: Lead-Off Negative Signal Status Register (address = 13h) (reset = 00h)
        14. 9.6.1.14 GPIO: General-Purpose I/O Register (address = 14h) (reset = 0Fh)
        15. 9.6.1.15 PACE: Pace Detect Register (address = 15h) (reset = 00h)
        16. 9.6.1.16 RESP: Respiration Control Register (address = 16h) (reset = 00h)
        17. 9.6.1.17 CONFIG4: Configuration Register 4 (address = 17h) (reset = 00h)
        18. 9.6.1.18 WCT1: Wilson Central Terminal and Augmented Lead Control Register (address = 18h) (reset = 00h)
        19. 9.6.1.19 WCT2: Wilson Central Terminal Control Register (address = 18h) (reset = 00h)
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Setting the Device for Basic Data Capture
        1. 10.1.1.1 Lead-Off
        2. 10.1.1.2 Right Leg Drive
        3. 10.1.1.3 Pace Detection
      2. 10.1.2 Establishing the Input Common-Mode
      3. 10.1.3 Antialiasing
    2. 10.2 Typical Applications
      1. 10.2.1 ADS129xR Respiration Measurement Using Internal Modulation Circuitry
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application Curve
      2. 10.2.2 Software-Based Artificial Pacemaker Detection Using the PACEOUT Pins on the ADS129x
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curve
  11. 11Power Supply Recommendations
    1. 11.1 Power-Up Sequencing
    2. 11.2 Connecting to Unipolar (3 V or 1.8 V) Supplies
    3. 11.3 Connecting to Bipolar (±1.5 V or ±1.8 V) Supplies
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

13 Device and Documentation Support

13.1 Related Links

Table 39 lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy.

Table 39. Related Links

PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY
ADS1294 Click here Click here Click here Click here Click here
ADS1294R Click here Click here Click here Click here Click here
ADS1296 Click here Click here Click here Click here Click here
ADS1296R Click here Click here Click here Click here Click here
ADS1298 Click here Click here Click here Click here Click here
ADS1298R Click here Click here Click here Click here Click here

13.2 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.

    TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
    Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.

13.3 Trademarks

E2E is a trademark of Texas Instruments.

SPI is a trademark of Motorola Inc.

All other trademarks are the property of their respective owners.

13.4 Electrostatic Discharge Caution

esds-image

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

13.5 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.