SNAS602C FEBRUARY   2013  – December 2014 ADS1293

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Application Diagram
  5. 5 Revision History
  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 Write Timing Requirements
    7. 7.7 Read Timing Requirements
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Flexible Routing Switch
      2. 8.3.2  Battery Monitoring
      3. 8.3.3  Test Mode
      4. 8.3.4  Analog Front-End
      5. 8.3.5  Instrumentation Amplifier (INA)
        1. 8.3.5.1 Instrumentation Amplifier Fault Detection
      6. 8.3.6  Sigma-Delta Modulator (SDM)
        1. 8.3.6.1 Sigma-Delta Modulator Fault Detection
      7. 8.3.7  Programmable Digital Filters
      8. 8.3.8  Filter Settling Time
      9. 8.3.9  Analog Pace Channel
      10. 8.3.10 Wilson Reference
        1. 8.3.10.1 Wilson Central Terminal
        2. 8.3.10.2 Goldberger Terminals
      11. 8.3.11 Common-Mode (CM) Detector
        1. 8.3.11.1 Cable Shield Driving
        2. 8.3.11.2 Common-Mode Output Range (CMOR)
      12. 8.3.12 Right-Leg Drive (RLD)
      13. 8.3.13 Capacitive Load Driving
      14. 8.3.14 Error Status: RLD Rail
      15. 8.3.15 Lead-Off Detection (LOD)
      16. 8.3.16 DC Lead-Off Detect
      17. 8.3.17 Analog AC Lead-Off Detect
      18. 8.3.18 Digital AC Lead-Off Detect
      19. 8.3.19 Clock Oscillator
      20. 8.3.20 Synchronization
      21. 8.3.21 Single-Chip Multi-Channel Synchronization
      22. 8.3.22 Multichip Synchronization
      23. 8.3.23 Synchronization Errors
      24. 8.3.24 Alarm Functions
      25. 8.3.25 Error Filtering
      26. 8.3.26 ALARMB Pin and Error Masking
      27. 8.3.27 Error Register Automatic Clearing Description
      28. 8.3.28 Alarm Propagation
      29. 8.3.29 Reference Voltage Generators
      30. 8.3.30 Power Management
    4. 8.4 Device Functional Modes
      1. 8.4.1 Low Sampling Rate
      2. 8.4.2 High Sampling Rate
      3. 8.4.3 Ouput Code (ADCOUT)
    5. 8.5 Programming
      1. 8.5.1 Serial Digital Interface
      2. 8.5.2 Digital Output Drive Strength
      3. 8.5.3 SPI Protocol
      4. 8.5.4 Random Register Access Protocol
      5. 8.5.5 Auto-Incrementing Address
      6. 8.5.6 Streaming
      7. 8.5.7 Data Ready Bar
      8. 8.5.8 Simultaneous ECG and Pace Data Read
    6. 8.6 Register Maps
      1. 8.6.1  Operation Mode Registers
      2. 8.6.2  Input Channel Selection Registers
      3. 8.6.3  Lead-Off Detect Control Registers
      4. 8.6.4  Common-Mode Detection and Right-Leg Drive Common-Mode Feedback Control Registers
      5. 8.6.5  Wilson Control Registers
      6. 8.6.6  Reference Registers
      7. 8.6.7  OSC Control Registers
      8. 8.6.8  AFE Control Registers
      9. 8.6.9  Error Status Registers
      10. 8.6.10 Digital Registers
      11. 8.6.11 Pace and ECG Data Read Back Registers
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 3-Lead ECG Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 5-Lead ECG Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 8- or 12-Lead ECG Application
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Three High-Resolution Digital ECG Channels With Simultaneous Pace Output
  • EMI-Hardened Inputs
  • Low Power: 0.3 mW/channel
  • Input-Referred Noise: 7 µVpp (40-Hz Bandwidth)
  • Input Bias Current: 175 pA
  • Data Rate: Up to 25.6 ksps
  • Differential Input Voltage Range: ±400 mV
  • Analog Supply Voltage: 2.7 V to 5.5 V
  • Digital I/O Supply Voltage: 1.65 V to 3.6 V
  • Right-Leg Drive Amplifier
  • AC and DC Lead-Off Detection
  • Wilson and Goldberger Terminals
  • ALARMB Pin for Interrupt Driven Diagnostics
  • Battery Voltage Monitoring
  • Built-In Oscillator and Reference
  • Flexible Power-Down and Standby Modes

2 Applications

  • Portable 1/2/3/5/6/7/8/12-Lead ECG
  • Patient Vital Sign Monitoring: Holter, Event, Stress, and Telemedicine
  • Automated External Defibrillator
  • Sports and Fitness (Heart Rate and ECG)

3 Description

The ADS1293 incorporates all features commonly required in portable, low-power medical, sports, and fitness electrocardiogram (ECG) applications. With high levels of integration and exceptional performance, the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1293 features three high-resolution channels capable of operating up to 25.6 ksps. Each channel can be independently programmed for a specific sample rate and bandwidth allowing users to optimize the configuration for performance and power. All input pins incorporate an EMI filter and can be routed to any channel through a flexible routing switch. Flexible routing also allows independent lead-off detection, right-leg drive, and Wilson/Goldberger reference terminal generation without the need to reconnect leads externally. A fourth channel allows external analog pace detection for applications that do not use digital pace detection.

The ADS1293 incorporates a self-diagnostics alarm system to detect when the system is out of the operating conditions range. Such events are reported to error flags. The overall status of the error flags is available as a signal on a dedicated ALARMB pin.

The device is packaged in a 5-mm × 5-mm × 0.8-mm, 28-pin LLP. Operating temperature ranges from –20°C to 85°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ADS1293 WQFN (28) 5.00 mm x 5.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Application Diagram

3lead_ecg_simplified.gif