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  • ADS7067 Small, 8-Channel, 16-Bit, 800-kSPS SAR ADC With GPIOs

    • SBASA78B March   2021  – September 2024 ADS7067

      PRODUCTION DATA  

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  • ADS7067 Small, 8-Channel, 16-Bit, 800-kSPS SAR ADC With GPIOs
  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Switching Characteristics
    8. 5.8 Timing Diagrams
    9. 5.9 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Analog Input and Multiplexer
      2. 6.3.2  Reference
        1. 6.3.2.1 External Reference
        2. 6.3.2.2 Internal Reference
      3. 6.3.3  ADC Transfer Function
      4. 6.3.4  ADC Offset Calibration
      5. 6.3.5  Programmable Averaging Filters
      6. 6.3.6  CRC on Data Interface
      7. 6.3.7  Oscillator and Timing Control
      8. 6.3.8  Diagnostic Modes
        1. 6.3.8.1 Bit-Walk Test Mode
        2. 6.3.8.2 Fixed Voltage Test Mode
      9. 6.3.9  Output Data Format
        1. 6.3.9.1 Status Flags
        2. 6.3.9.2 Output CRC (Device to Host)
        3. 6.3.9.3 Input CRC (Host to Device)
      10. 6.3.10 Device Programming
        1. 6.3.10.1 Enhanced-SPI Interface
        2. 6.3.10.2 Daisy-Chain Mode
        3. 6.3.10.3 Register Read/Write Operation
          1. 6.3.10.3.1 Register Write
          2. 6.3.10.3.2 Register Read
            1. 6.3.10.3.2.1 Register Read With CRC
    4. 6.4 Device Functional Modes
      1. 6.4.1 Device Power-Up and Reset
      2. 6.4.2 Manual Mode
      3. 6.4.3 On-the-Fly Mode
      4. 6.4.4 Auto-Sequence Mode
    5. 6.5 ADS7067 Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Charge-Kickback Filter and ADC Amplifier
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 AVDD and DVDD Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
  12. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • RTE|16
    • MPQF149D
  • YBH|16
    • MPBGAQ3
Thermal pad, mechanical data (Package|Pins)
  • RTE|16
    • QFND525B
Orderable Information
  • sbasa78b_oa
  • sbasa78b_pm
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Data Sheet

ADS7067 Small, 8-Channel, 16-Bit, 800-kSPS SAR ADC With GPIOs

1 Features

  • Package options:
    • 1.636mm × 1.636mm DSBGA and 3mm × 3mm WQFN
    • Space-saving, capless, 2.5V internal reference
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digital outputs
  • Programmable averaging filters:
    • Programmable sample size for averaging
    • Averaging with internal conversions
    • 20-bit resolution for average output
  • Low-leakage multiplexer with channel sequencer:
    • Manual mode
    • On-the-fly mode
    • Auto-sequence mode
  • Excellent AC and DC performance:
    • SNR: 90dB, THD: –100dB
    • Improved SNR with programmable averaging filters
    • INL: ±1LSB, 16-bit no missing codes
    • Internal calibration improves offset and drift
    • High sample rate with no latency output: 800kSPS
  • Wide operating range:
    • ADC input range: 0V to VREF and 2 × VREF
    • Analog supply: 3V to 5.5V
    • Digital supply: 1.65V to 5.5V
    • Temperature range: –40°C to +125°C
  • Enhanced-SPI digital interface:
    • High-speed, 60MHz SPI interface

2 Applications

  • Optical modules
  • Optical line cards
  • Multiparameter patient monitors

3 Description

The ADS7067 is a small, 16-bit, 8-channel, high-precision successive-approximation register (SAR) analog-to-digital converter (ADC). The ADS7067 has an integrated capless reference and a reference buffer that helps reduce the overall solution size by requiring fewer external components. The wafer-level-chip-scale package and fewer external components make this device designed for space-constrained applications. The device family includes the ADS7067 (800kSPS) and the ADS7066 (250kSPS) speed variants.

The ADS7067 features built-in offset calibration for improved accuracy over wide operating conditions of the system. The programmable averaging filters enable higher resolution measurement. The eight channels of the ADS7067 can be individually configured as analog inputs, digital inputs, or digital outputs that enable smaller system size and simplify circuit design for mixed signal feedback and digital control.

The enhanced-SPI enables the ADS7067 in achieving high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. The ADS7067 features a cyclic redundancy check (CRC) for data read and write operations and the power-up configuration.

Package Information
PART NAME PACKAGE(1) PACKAGE SIZE(2)
ADS7067 YBH (DSBGA, 16) 1.636mm × 1.636mm
RTE (WQFN, 16) 3mm × 3mm
(1) For more information, see the Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and includes pins, where applicable
ADS7067 ADS7067 Block Diagram ADS7067 Block Diagram

 
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