SLVSMZ0 September   2026 ADS111S02

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Diagram
  8. 7 Parameter Measurement Information
    1. 7.1 Noise Performance
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Multiplexer
      2. 8.3.2 Voltage Reference
      3. 8.3.3 Oscillator
      4. 8.3.4 Output Data Rate and Conversion Time
      5. 8.3.5 Low-Noise PGA
      6. 8.3.6 Temperature Sensor
        1. 8.3.6.1 12-Bit Temperature Data Format (ADS101S02)
        2. 8.3.6.2 Converting from Digital Codes to Temperature, 12-Bit Temperature Sensor Data
        3. 8.3.6.3 14-Bit Temperature Data Format (ADS101S02)
        4. 8.3.6.4 Converting from Digital Codes to Temperature, 14-Bit Temperature Sensor Data
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Up and Reset
      2. 8.4.2 Operating Modes
        1. 8.4.2.1 Single-Shot Conversion Mode
        2. 8.4.2.2 Continuous-Conversion Mode
    5. 8.5 Programming
      1. 8.5.1 Serial Interface (SPI)
      2. 8.5.2 Chip Select (CS)
      3. 8.5.3 Serial Clock (SCLK)
      4. 8.5.4 Data Input (DIN)
      5. 8.5.5 Data Output and Data Ready (DOUT/DRDY)
      6. 8.5.6 Data Retrieval and Device Configuration
        1. 8.5.6.1 32-Bit Data Transmission Cycle
        2. 8.5.6.2 16-Bit Data Transmission Cycle
    6. 8.6 Conversion Data Format
  10. 9 Register Maps
  11. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Serial Interface Connections
      2. 10.1.2 Connecting Multiple Devices
      3. 10.1.3 Single-Ended Inputs
      4. 10.1.4 Unused Inputs and Outputs
      5. 10.1.5 Input Protection
      6. 10.1.6 Analog Input Filtering
      7. 10.1.7 Duty Cycling For Low Power
      8. 10.1.8 Pseudo Code Example
    2. 10.2 Typical Applications
      1. 10.2.1 K-Type Thermocouple with Thermistor Cold-Junction Compensation
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
      2. 10.2.2 Server Card System Monitoring Application
    3. 10.3 Power Supply Recommendations
      1. 10.3.1 Power-Supply Sequencing
      2. 10.3.2 Power-Supply Decoupling
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.6 Conversion Data Format

Conversion data are coded depending on the MUX[2:0] configuration. Configurations that use AINN = GND use unipolar straight binary data format, all other configurations use binary two's complement data format, MSB first (sign bit). Table 8-5 shows the conversion data format based on the MUX[2:0] settings.

Table 8-5 Conversion Data Format
MUX[2:0] AINP AINN CONVERSION DATA FORMAT
000b AIN0 AIN1 Binary Two's Compliment
001b AIN0 AIN3 Binary Two's Compliment
010b AIN1 AIN3 Binary Two's Compliment
011b AIN2 AIN3 Binary Two's Compliment
100b AIN0 GND Unipolar Straight Binary
101b AIN1 GND Unipolar Straight Binary
110b AIN2 GND Unipolar Straight Binary
111b AIN3 GND Unipolar Straight Binary

Table 8-6 and Table 8-7 show the output coding for the 12- and 16-bit devices, respectively. In binary two's-complement format, the conversion data clips to positive and negative full-scale code values when the input signal exceeds the respective positive and negative full-scale values. In unipolar straight binary format, conversion data clips to full-scale or zero code values when the input signal exceeds full-scale or is below zero, respectively.

Table 8-6 Ideal Output Code Versus Input Signal (12-Bit Device)
DIFFERENTIAL INPUT VOLTAGE (V) IDEAL OUTPUT CODE(1)
BINARY TWO'S-COMPLEMENT FORMAT UNIPOLAR STRAIGHT BINARY FORMAT
≥ FSR × (212 – 1) / 212 7FFh FFFh
≥ FSR × (211 – 1) / 211 FFEh
FSR / 211 001h 002h
0 000h 000h
–FSR / 211 FFFh
–FSR × (211 – 1) / 211 801h
≤ –FSR 800h
(1) Ideal output data, excluding offset, gain, linearity, and noise errors.
Table 8-7 Ideal Output Code Versus Input Signal (16-Bit Device)
DIFFERENTIAL INPUT VOLTAGE (V) IDEAL OUTPUT CODE(1)
BINARY TWO'S-COMPLEMENT FORMAT UNIPOLAR STRAIGHT BINARY FORMAT
≥ FSR × (216 – 1) / 216 7FFFh FFFFh
≥ FSR × (215 – 1) / 215 FFFEh
FSR / 215 0001h 0002h
0 0000h 0000h
–FSR / 215 FFFFh
–FSR × (215 – 1) / 215 8001h
≤ –FSR 8000h
(1) Ideal output data, excluding offset, gain, linearity, and noise errors.