SBAS928C February   2020  – September 2023 ADS7066

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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 Switching Characteristics
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Analog Input and Multiplexer
      2. 7.3.2  Reference
        1. 7.3.2.1 External Reference
        2. 7.3.2.2 Internal Reference
      3. 7.3.3  ADC Transfer Function
      4. 7.3.4  ADC Offset Calibration
      5. 7.3.5  Programmable Averaging Filters
      6. 7.3.6  CRC on Data Interface
      7. 7.3.7  Oscillator and Timing Control
      8. 7.3.8  Diagnostic Modes
        1. 7.3.8.1 Bit-Walk Test Mode
        2. 7.3.8.2 Fixed Voltage Test Mode
      9. 7.3.9  Output Data Format
        1. 7.3.9.1 Status Flags
        2. 7.3.9.2 Output CRC (Device to Host)
        3. 7.3.9.3 Input CRC (Host to Device)
      10. 7.3.10 Device Programming
        1. 7.3.10.1 Enhanced-SPI Interface
        2. 7.3.10.2 Daisy-Chain Mode
        3. 7.3.10.3 Register Read/Write Operation
          1. 7.3.10.3.1 Register Write
          2. 7.3.10.3.2 Register Read
            1. 7.3.10.3.2.1 Register Read With CRC
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Power-Up and Reset
      2. 7.4.2 Manual Mode
      3. 7.4.3 On-the-Fly Mode
      4. 7.4.4 Auto-Sequence Mode
    5. 7.5 ADS7066 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Charge-Kickback Filter and ADC Amplifier
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 AVDD and DVDD Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.7 Oscillator and Timing Control

The device uses an internal oscillator for conversion. When using the averaging module, the host initiates the first conversion and subsequent conversions are generated internally by the device. When the device generates the start of a conversion, the sampling rate can be controlled as described in Table 7-3 by the OSC_SEL and CLK_DIV[3:0] register fields.

The conversion time of the device, given by tCONV in the Switching Characteristics table in the Specifications section, is independent of the OSC_SEL and CLK_DIV[3:0] configuration.

Table 7-3 Configuring the Sampling Rate for Internal Conversion Start Control
CLK_DIV[3:0]OSC_SEL = 0OSC_SEL = 1
SAMPLING FREQUENCY, fCYCLE_OSR (kSPS)CYCLE TIME, tCYCLE_OSR (µs)SAMPLING FREQUENCY, fCYCLE_OSR (kSPS)CYCLE TIME, tCYCLE_OSR (µs)
0000bReserved. Do not use.Reserved. Do not use.31.2532
0001bReserved. Do not use.Reserved. Do not use.20.8348
0010bReserved. Do not use.Reserved. Do not use.15.6364
0011bReserved. Do not use.Reserved. Do not use.10.4296
0100b25047.81128
0101b166.765.21192
0110b12583.91256
0111b83122.60384
1000b62.5161.95512
1001b41.7241.3768
1010b31.3320.981024
1011b20.8480.651536
1100b15.6640.492048
1101b10.4960.333072