TIDUDW4B January   2019  – December 2024 CC2640R2F , TMP117

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TMP119
      2. 2.3.2 CC2340R5
    4. 2.4 System Design Theory
      1. 2.4.1 Shelf Life and Active Life
      2. 2.4.2 Wearer Comfort
      3. 2.4.3 System Accuracy
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
        1. 3.1.2.1 Reading From the Patch
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
        1. 3.2.1.1 Current Consumption and Life Span
      2. 3.2.2 Test Results
        1. 3.2.2.1 Current Consumption and Lifespan
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Considerations for the CC2340R5
      2. 4.3.2 Layout Considerations for the TMP119
        1. 4.3.2.1 WCSP (YBG) Package
      3. 4.3.3 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
    7. 4.7 Related Documentation
    8. 4.8 Trademarks
    9. 4.9 Revision History

2.4.3 System Accuracy

For compliance under the ISO-80601 and ASTM E1112 medical standards for intermittent patient temperature monitors, system accuracy must be verified using a liquid bath and a highly accurate reference. Table 2-1 shows a summary of these accuracy requirements as specified by ASTM E1112. The TMP119 is designed to exceed these requirements, but the designer must also consider the temperature offset caused by the integration of the device into a design for total system accuracy. A single-point calibration around the center of the desired range can provide accuracy within most systems, and this offset correction can be stored within the temperature offset register of the TMP119.

If an offset is necessary in production systems, the designer must test a statistically significant sample of the final product to determine the best offset for the TMP119, or plan to perform a calibration during manufacturing.

Table 2-1 Temperature Accuracy Requirements Under ASTM E1112
TEMPERATURE (°C) MAXIMUM ERROR (°C)
< 35.8 ± 0.3
35.8–37 ± 0.2
37.0–39.0 ± 0.1
39.0–41.0 ± 0.2
> 41.0 ± 0.3