Reference Designs
0°C – 100°C: Hardware-Compensated Ratiometric 3-Wire RTD System Reference Design
Texas Instruments
This TI Precision Verified Design implements a hardware compensated 3-wire RTD acquisition system that accurately measures temperature from 0 °C - 100 °C. The voltage input and reference voltage are placed in a ratiometric configuration in order to reduce the errors from noise and drift and improve overall system accuracy. The ADS1247 simplifies the front-end solution through integration of the required current sources: programmable gain amplifier: and digitally-controlled multiplexer in to one chip. The current sources are chopped to minimize any mismatch between the two sources. The TPS7A4901 adjustable-output: high-PSRR LDO is suggested as a clean power alternative versus the existing USB supply to further improve system accuracy.
Features
- Measures temperature from 0 °C - 100 °C from 3-wire RTDSingle-Supply SolutionRatiometric configurationUtilizes ADS1247: 24-bit ΔΣ ADC
Applications
- Oscilloscopes & digitizers
- Infusion pump
- Analog input module
- Wearable fitness & activity monitor
- Spectrum analyzer
- Mixed module (AI
- AO
- DI
- DO)
- Vector signal transceiver (VST)
- Mother & neonatal care monitor
- Expansion module
- Temperature controller
- Injection molding machine
- Wireless communications test
Product Categories
- Data converters
End Equipment Reference Diagrams
Application Area
End Equipment
Featured products
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | DP83TC811-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | UCC15240-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | TMP1827 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | SN74AHC1G02-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | DLP301S |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | TMUXHS221LV |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
