Texas Instruments LM95172 13- to 16-Bit Digital Temperature Sensor

Texas Instruments LM95172 13- to 16-bit 200ºC Digital Temperature Sensor features a very linear sigma-delta analog-to-digital converter, high accuracy, fast conversion rates, and extremely low output noise. LM95172 digital temperature sensor offers an operating temperature as low as -40ºC and optimized accuracy from 120ºC to 200ºC, making it ideal for high-temperature applications. LM95172 can be programmed to operate from 13 bits (0.0625°C per LSB) to 16 bits (0.0078125°C per LSB) resolution. Texas Instruments LM95172 powers up in 35ms, the fastest conversion time, when the temperature output is set at 13-bit resolution. When in 14-, 15-, or 16-bit mode, the least significant bit in the 16-bit temperature register toggles after the completion of each conversion. This bit may be monitored to verify that the conversion is complete. The high noise immunity of the Serial I/O output makes it ideal for use in challenging electromagnetic environments.

Features

  • AEC-Q100 Grade 0 qualified and manufactured on an Automotive Grade Flow
  • 13-bit (0.0625°C LSB) to 16-bit (0.0078125°C LSB) temperature resolution
  • Wide -40°C to +200°C temperature range
  • 35ms best conversion time tracks fast temp changes
  • OVERTEMP digital output switches when TDIE > THIGH
  • Shutdown mode saves power yet wakes up for a one-shot temperature update
  • SPI and MICROWIRE Bus interface
  • 10-Pin Cerpack high-temperature ceramic package

Applications

  • High-temperature automotive
  • Industrial power controllers
  • Industrial motors
  • Gearboxes
  • Geothermal instrumentation
  • High-temperature test equipment

Specifications

  • Analog and Digital Supply Voltage: 3.0V to 5.5V
  • Total Supply Current Operating: 400µA (typ)
    • Shutdown -40°C to +140°C: 4µA (max)
    • Shutdown -40°C to +175°C: 12µA (max)
    • Shutdown -40°C to +200°C: 28µA (max)
  • Temperature Accuracy
    • +175°C to +200°C: ±3.0°C (max)
    • +130°C to +160°C: ±1.0°C (max)
    • +120°C to +130°C: ±2.0°C (max)
    • +160°C to +175°C: ±2.0°C (max)
    • -40°C to +120°C: ±3.5°C (max)
  • Temperature Resolution
    • 13-bit mode: 0.0625°C/LSB
    • 16-bit mode: 0.0078125°C/LSB
  • Conversion Time
    • 13-bit mode: 43ms (max)
    • 16-bit mode: 350ms (max)

Functional Diagram

Block Diagram - Texas Instruments LM95172 13- to 16-Bit Digital Temperature Sensor
公開: 2012-03-02 | 更新済み: 2025-03-11