Reference Designs
±0.5°C 2-Wire Galvanically Isolated IC Temp Sensor with Pulse Count Interface Reference Design
Texas Instruments
In order to provide system designers a new cost-effective and easy alternative to assured precision temperature measurement: this reference design discusses the new tiny 2-pin digital output IC temperature sensor with single wire pulse count interface that enhances reliability and greatly simplifies the design of galvanic isolation architecture for sending both power and unidirectional data through same low profile transformer and remote operation. In addition: with fewer error sources: computation of error budget is easier. Cost budgets: accuracy: size and simplicity of interfacing with other circuit elements are main factors in selecting a sensor to do a job and this reference design system tremendously helps in meeting all these requirements. With less-than 0.25 °C maximum measured error over temperature range -50 °C to 150 °C: functional isolation of 400VRMS and IEC61000-4-4 pre-compliance testing: this design significantly reduces the design time for development of high-accuracy temperature measurement systems.
Features
- Allows Single Low-Profile Transformer for Power and Data Isolation While Eliminating the Need for Optocoupler or Digital Isolator on Data LinePower and Data Coexist on 2–Wire Interface for Remote Temperature Sensing Across IsolationNo Need of System Level Calibration Unlike ThermistorsReplacement for RTDs and NTC or PTC ThermistorsEliminates High-Precision Active or Passive ComponentsFunctional Isolation of 400 VRMS and Dielectric up to 2500-V AC for 60 secondsPre-Compliance Testing: Meets IEC61000-4-4 EFT (Level 4): ±2 kV – Class-AAccuracy Over Temperature: Measured Error Using LUT: Measured Error Using 1st Order Transfer Function: Guaranteed Limits from LMT01 Datasheet Using LUT:
Applications
- Desktop PC/motherboard
- Cordless vacuum cleaner
- Temperature transmitter
- Dishwasher
- Cordless power tool
- Coffee machine
- Mixer
- blender & food processor
- Air conditioner outdoor unit
- Vacuum robot
- Cooker hood
- Cordless handheld garden tool
- Seeker front end
- Mains powered tools
- Radar
- Programmable DC power supply
- HVAC motor control
- Lawn mower
- Robotic lawn mower
- Air conditioner indoor unit
- Humanoid
- Mother & neonatal care monitor
- Motorized electronic wheel chair
- Medical chair & table
- Chromebook & WOA
- Residential & living fan
- Residential water heater
- Standard notebook PC
- Ultrasound scanner
- Heat pump
- Operation tables
Product Categories
- Sensors
End Equipment Reference Diagrams
Application Area
End Equipment
Featured products
| Manufacturer: | Texas Instruments |
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| Part Family: | DP83TC811-Q1 |
| Status: | ACTIVE |
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| Manufacturer: | Texas Instruments |
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| Part Family: | UCC15240-Q1 |
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| Part Family: | SN74AHC1G02-Q1 |
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| Part Family: | DLP301S |
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| Manufacturer: | Texas Instruments |
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| Part Family: | TMUXHS221LV |
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| PB Free: | Y |
