SNOAA67A May   2021  – June 2022 TMP116 , TMP117 , TMP1826 , TMP61 , TMP63 , TMP64

 

  1.   Abstract
  2.   Trademarks
  3. 1RTD Introduction
    1. 1.1 Common Wiring Configurations
    2. 1.2 RTD Tolerances and Accuracy
    3. 1.3 Error Sources of RTD Systems
      1. 1.3.1 Error Minimization Circuitry
  4. 2RTD Alternatives
    1. 2.1 TMP116 and TMP117
    2. 2.2 TMP1826
    3. 2.3 TMP6x
  5. 3Conclusion
  6. 4References
  7. 5Revision History

2.2 TMP1826

The TMP1826 is a high-accuracy, single-wire compatible digital output temperature sensor. The typical accuracy of this device is ±0.1°C across the temperature range of –20°C to +85°C. Figure 2-3 shows the bus-powered mode where the TMP1826 only requires a single connection and a ground return, which helps to simplify design and reduce cost by limiting the number of wires in the system. Alternatively, the VDD pin gives users the option to use a dedicated power supply for certain applications that may require it. This is seen in Figure 2-4. The TMP1826 also has integrated 8-kV IEC-61000-4-2 ESD protection on the data pin, which removes the need for any external protection components.

Figure 2-3 TMP1826 Bus Powered Application
Figure 2-4 TMP1826 Supply Powered Application

Figure 2-5 shows the accuracy of the TMP1826 across temperature. The data sheet minimum and maximum temperature error specifications are identified by the red lines on the graph, while the typical performance of the TMP1826 is shown in black. This device can provide another high-accuracy alternative to complicated RTD circuits.

Figure 2-5 TMP1826 Temperature Error vs Temperature
Table 2-2 TMP1826 Accuracy Across Temperature Range
Temperature Range Accuracy
–20°C to +85°C ±0.3°C
–40°C to +125°C ±0.5°C