April 8, 2018
TIDA-01526 implements a full DTM sub-system with two PT500 or PT1000 sensors, meeting the requirements for heat and cold meters per EN1434. The serial configuration supports both 2-wire sensors for residential meters or 4-wire sensors for heat calculators. The differential temperature accuracy of the solution is better than 20 mK over the measured temperature range of 0 to 150°C for 2-wire and 4-wire sensors, using offset and gain calibration.
1Overview of temperature measurement in heat meters (2)
This section introduces the heat and cold meter training series.
2Measuring RTD sensors with delta-sigma ADS1220 family (3)
ADS1220 delta-sigma family uses the ratiometric approach for measuring RTD sensors with the built-in current excitation source.
3Differential Temperature Measurement (DTM) sub-system reference design (1)
TIDA-01526 implements a high-precision DTM sub-system using a 24-bit, low-power, Delta-Sigma ADC.
4Digital temperature sensor replacement of RTD sensors with TMP116 (1)
The TMP116 digital precision temperature sensor for the -55 to +125ºC range achieves higher accuracy than the Class AA PT sensor with a 1-point calibration.