High Precision Temperature Measurement for Heat and Cold Meters Reference Design
Description
This reference design implements a high-precision differential temperature measurement (DTM) subsystem using a 24-bit: low-power: delta-sigma ADC. Heat and cold meter DTM subsystems typically use two 2- or 4-wire Resistance Temperature Detectors (RTD) such as PT100: PT500: or PT1000 and can achieve a differential temperature measurement accuracy of 10 mK over a water temperature range of 3 °C to 180 °C. TIDA-01526 implements a single chip: cost-effective DTM system that can be combined with TI's ultra-sonic or rotation detection flow measurement subsystems to provide a full heat or cold meter solution.
Features
- Meets EN1434 requirements for RTD sensor pair temperature measurement subsystems in heat and cold meters and heat calculatorsMax. 60 mK absolute temperature deviation from 0 to 150 °C for 2- or 4-wire RTDs meets ±100 mK limit (EN1434-5:2014)Meets max. ±700 mK error limit for each PT sensor at 3 typical temperature measurements points: e.g. at 10 °C: 30 °C and 50 °C (EN1434-5:2014)ADC122x04 achieves ultra-low power consumption by power-cycling with 50-μs start-up time and programmable current source: gain: and output data ratesDifferential temperature measurement of two RTDs in series with 0.01 °C resolution40-pin BoosterPack form factor (BoosterPack 20-pin backwards compatible)
Applications
- Heat meter
- Software defined radio
- Lab & field Instrumentation
- Power analyzer
- Programmable DC power supply
- Parametric measurement unit (PMU)
- Expansion module
Product Categories
- Data converters