SBAS526D November   2012  – September 2019 ADS1018

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      K-Type Thermocouple Measurement Using Integrated Temperature Sensor for Cold-Junction Compensation
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Multiplexer
      2. 8.3.2 Analog Inputs
      3. 8.3.3 Full-Scale Range (FSR) and LSB Size
      4. 8.3.4 Voltage Reference
      5. 8.3.5 Oscillator
      6. 8.3.6 Temperature Sensor
        1. 8.3.6.1 Converting from Temperature to Digital Codes
        2. 8.3.6.2 Converting from Digital Codes to Temperature
    4. 8.4 Device Functional Modes
      1. 8.4.1 Reset and Power-Up
      2. 8.4.2 Operating Modes
        1. 8.4.2.1 Single-Shot Mode and Power-Down
        2. 8.4.2.2 Continuous-Conversion Mode
      3. 8.4.3 Duty Cycling for Low Power
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
      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 Format
      7. 8.5.7 Data Retrieval
        1. 8.5.7.1 32-Bit Data Transmission Cycle
        2. 8.5.7.2 16-Bit Data Transmission Cycle
    6. 8.6 Register Maps
      1. 8.6.1 Conversion Register [reset = 0000h]
        1. Table 4. Conversion Register Field Descriptions
      2. 8.6.2 Config Register [reset = 058Bh]
        1. Table 5. Config Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Serial Interface Connections
      2. 9.1.2 GPIO Ports for Communication
      3. 9.1.3 Analog Input Filtering
      4. 9.1.4 Single-Ended Inputs
      5. 9.1.5 Connecting Multiple Devices
      6. 9.1.6 Pseudo Code Example
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-Supply Sequencing
    2. 10.2 Power-Supply Decoupling
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.6 Temperature Sensor

The ADS1018 offers an integrated precision temperature sensor. To enable the temperature sensor mode, set bit TS_MODE = 1 in the Config register. Temperature data are represented as a 12-bit result that is left-justified within the 16-bit conversion result. Data are output starting with the most significant byte (MSB). When reading the two data bytes, the first 12 bits are used to indicate the temperature measurement result. One 12-bit LSB equals 0.125°C. Negative numbers are represented in binary twos complement format, as shown in Table 2.

Table 2. 12-Bit Temperature Data Format

TEMPERATURE (°C) DIGITAL OUTPUT (BINARY) HEX
128 0 100 0000 0000 400
127.875 0 011 1111 1111 3FF
100 0 011 0010 0000 320
80 0 010 1000 0000 280
75 0 010 0101 1000 258
50 0 001 1001 0000 190
25 0 000 1100 1000 0C8
0.25 0 000 0000 0010 002
0 0 000 0000 0000 000
–0.25 1 111 1111 1110 FFE
–25 1 111 0011 1000 F38
–40 1 110 1100 0000 EC0