SBAS499C July   2012  – January 2017 ADS1299 , ADS1299-4 , ADS1299-6

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 Parametric 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 Input Multiplexer
          1. 9.3.1.1.1 Device Noise Measurements
          2. 9.3.1.1.2 Test Signals (TestP and TestN)
          3. 9.3.1.1.3 Temperature Sensor (TempP, TempN)
          4. 9.3.1.1.4 Supply Measurements (MVDDP, MVDDN)
          5. 9.3.1.1.5 Lead-Off Excitation Signals (LoffP, LoffN)
          6. 9.3.1.1.6 Auxiliary Single-Ended Input
        2. 9.3.1.2 Analog Input
        3. 9.3.1.3 PGA Settings and Input Range
          1. 9.3.1.3.1 Input Common-Mode Range
          2. 9.3.1.3.2 Input Differential Dynamic Range
          3. 9.3.1.3.3 ADC ΔΣ Modulator
          4. 9.3.1.3.4 Reference
      2. 9.3.2 Digital Functionality
        1. 9.3.2.1 Digital Decimation Filter
          1. 9.3.2.1.1 Sinc Filter Stage (sinx / x)
        2. 9.3.2.2 Clock
        3. 9.3.2.3 GPIO
        4. 9.3.2.4 ECG and EEG Specific Features
          1. 9.3.2.4.1 Input Multiplexer (Rerouting the BIAS Drive Signal)
          2. 9.3.2.4.2 Input Multiplexer (Measuring the BIAS Drive Signal)
          3. 9.3.2.4.3 Lead-Off Detection
            1. 9.3.2.4.3.1 DC Lead-Off
            2. 9.3.2.4.3.2 AC Lead-Off (One Time or Periodic)
          4. 9.3.2.4.4 Bias Lead-Off
          5. 9.3.2.4.5 Bias Drive (DC Bias Circuit)
            1. 9.3.2.4.5.1 Bias Configuration with Multiple Devices
    4. 9.4 Device Functional Modes
      1. 9.4.1 Start
        1. 9.4.1.1 Settling Time
      2. 9.4.2 Reset (RESET)
      3. 9.4.3 Power-Down (PWDN)
      4. 9.4.4 Data Retrieval
        1. 9.4.4.1 Data Ready (DRDY)
        2. 9.4.4.2 Reading Back Data
      5. 9.4.5 Continuous Conversion Mode
      6. 9.4.6 Single-Shot Mode
    5. 9.5 Programming
      1. 9.5.1 Data Format
      2. 9.5.2 SPI Interface
        1. 9.5.2.1 Chip Select (CS)
        2. 9.5.2.2 Serial Clock (SCLK)
        3. 9.5.2.3 Data Input (DIN)
        4. 9.5.2.4 Data Output (DOUT)
      3. 9.5.3 SPI Command Definitions
        1. 9.5.3.1  Sending Multi-Byte Commands
        2. 9.5.3.2  WAKEUP: Exit STANDBY Mode
        3. 9.5.3.3  STANDBY: Enter STANDBY Mode
        4. 9.5.3.4  RESET: Reset Registers to Default Values
        5. 9.5.3.5  START: Start Conversions
        6. 9.5.3.6  STOP: Stop Conversions
        7. 9.5.3.7  RDATAC: Read Data Continuous
        8. 9.5.3.8  SDATAC: Stop Read Data Continuous
        9. 9.5.3.9  RDATA: Read Data
        10. 9.5.3.10 RREG: Read From Register
        11. 9.5.3.11 WREG: Write to Register
    6. 9.6 Register Maps
      1. 9.6.1 User Register Description
        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 = 96h)
        3. 9.6.1.3  CONFIG2: Configuration Register 2 (address = 02h) (reset = C0h)
        4. 9.6.1.4  CONFIG3: Configuration Register 3 (address = 03h) (reset = 60h)
        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 = 61h)
        7. 9.6.1.7  BIAS_SENSP: Bias Drive Positive Derivation Register (address = 0Dh) (reset = 00h)
        8. 9.6.1.8  BIAS_SENSN: Bias Drive Negative 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 MISC1: Miscellaneous 1 Register (address = 15h) (reset = 00h)
        16. 9.6.1.16 MISC2: Miscellaneous 2 (address = 16h) (reset = 00h)
        17. 9.6.1.17 CONFIG4: Configuration Register 4 (address = 17h) (reset = 00h)
  10. 10Applications and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Unused Inputs and Outputs
      2. 10.1.2 Setting the Device for Basic Data Capture
        1. 10.1.2.1 Lead-Off
        2. 10.1.2.2 Bias Drive
      3. 10.1.3 Establishing the Input Common-Mode
      4. 10.1.4 Multiple Device Configuration
        1. 10.1.4.1 Cascaded Mode
        2. 10.1.4.2 Daisy-Chain Mode
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
    1. 11.1 Power-Up Sequencing
    2. 11.2 Connecting the Device to Unipolar (5 V and 3.3 V) Supplies
    3. 11.3 Connecting the Device to Bipolar (±2.5 V and 3.3 V) Supplies
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

6 Pin Configuration and Functions

PAG Package
64-Pin TQFP
Top View
ADS1299 ADS1299-4 ADS1299-6 po_qfp_bas499.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
AVDD 19, 21, 22, 56, 59 Supply Analog supply. Connect a 1-μF capacitor to AVSS.
59 Supply Charge pump analog supply. Connect a 1-μF capacitor to AVSS, pin 58.
AVDD1 54 Supply Analog supply. Connect a 1-μF capacitor to AVSS1.
AVSS 20, 23, 32, 57 Supply Analog ground
58 Supply Analog ground for charge pump
AVSS1 53 Supply Analog ground
BIASIN 62 Analog input Bias drive input to MUX
BIASINV 61 Analog input/output Bias drive inverting input
BIASOUT 63 Analog output Bias drive output
BIASREF 60 Analog input Bias drive noninverting input
CS 39 Digital input Chip select, active low
CLK 37 Digital input Master clock input
CLKSEL 52 Digital input Master clock select(2)
DAISY_IN 41 Digital input Daisy-chain input
DGND 33, 49, 51 Supply Digital ground
DIN 34 Digital input Serial data input
DOUT 43 Digital output Serial data output
DRDY 47 Digital output Data ready, active low
DVDD 48, 50 Supply Digital power supply. Connect a 1-μF capacitor to DGND.
GPIO1 42 Digital input/output General-purpose input/output pin 1.
Connect to DGND with a ≥10-kΩ resistor if unused.
GPIO2 44 Digital input/output General-purpose input/output pin 2.
Connect to DGND with a ≥10-kΩ resistor if unused.
GPIO3 45 Digital input/output General-purpose input/output pin 3.
Connect to DGND with a ≥10-kΩ resistor if unused.
GPIO4 46 Digital input/output General-purpose input/output pin 4.
Connect to DGND with a ≥10-kΩ resistor if unused.
IN1N 15 Analog input Differential analog negative input 1(1)
IN1P 16 Analog input Differential analog positive input 1(1)
IN2N 13 Analog input Differential analog negative input 2(1)
IN2P 14 Analog input Differential analog positive input 2(1)
IN3N 11 Analog input Differential analog negative input 3(1)
IN3P 12 Analog input Differential analog positive input 3(1)
IN4N 9 Analog input Differential analog negative input 4(1)
IN4P 10 Analog input Differential analog positive input 4(1)
IN5N 7 Analog input Differential analog negative input 5(1) (ADS1299-6 and ADS1299 only)
IN5P 8 Analog input Differential analog positive input 5(1) (ADS1299-6 and ADS1299 only)
IN6N 5 Analog input Differential analog negative input 6(1) (ADS1299-6 and ADS1299 only)
IN6P 6 Analog input Differential analog positive input 6(1) (ADS1299-6 and ADS1299 only)
IN7N 3 Analog input Differential analog negative input 7(1) (ADS1299 only)
IN7P 4 Analog input Differential analog positive input 7(1) (ADS1299 only)
IN8N 1 Analog input Differential analog negative input 8(1) (ADS1299 only)
IN8P 2 Analog input Differential analog positive input 8(1) (ADS1299 only)
NC 27, 29 — No connection, leave as open circuit
Reserved 64 Analog output Reserved for future use, leave as open circuit
RESET 36 Digital input System reset, active low
RESV1 31 Digital input Reserved for future use, connect directly to DGND
SCLK 40 Digital input Serial clock input
SRB1 17 Analog input/output Patient stimulus, reference, and bias signal 1
SRB2 18 Analog input/output Patient stimulus, reference, and bias signal 2
START 38 Digital input Synchronization signal to start or restart a conversion
PWDN 35 Digital input Power-down, active low
VCAP1 28 Analog output Analog bypass capacitor pin. Connect a 100-μF capacitor to AVSS.
VCAP2 30 Analog output Analog bypass capacitor pin. Connect a 1-μF capacitor to AVSS.
VCAP3 55 Analog output Analog bypass capacitor pin. Connect a parallel combination of 1-μF and 0.1-μF capacitors to AVSS.
VCAP4 26 Analog output Analog bypass capacitor pin. Connect a 1-μF capacitor to AVSS.
VREFN 25 Analog input Negative analog reference voltage.
VREFP 24 Analog input/output Positive analog reference voltage. Connect a minimum 10-μF capacitor to VREFN.
(1) Connect unused analog inputs directly to AVDD.
(2) Set the two-state mode setting pins high to DVDD or low to DGND through ≥10-kΩ resistors.