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Sensirion STS41A AEC-Q100 Digital Temperature Sensors

Sensirion STS41A AEC-Q100 Digital Temperature Sensors is a digital sensor platform for measuring temperature with different accuracy gradings. The STS4xA sensors meet the demanding reliability requirements of automotive applications, including accelerated life tests at +85°C and 85% relative humidity. The Sensirion sensors can be interfaced using the I2C protocol. An integrated heater allows advanced onboard diagnostics, while the sensor element is designed for reliable operation in harsh conditions. The four-pin dual-flat-no-leads (DFN) package is suitable for surface-mount technology (SMT) processing, with a wettable flank (STS41A-AW1B) option available.

Features

  • Up to ±0.3°C temperature accuracy
  • 2.3V to 5.5V supply voltage range
  • I2C fast mode plus, CRC checksum
  • -40°C to +125°C operating temperature range
  • Onboard diagnostics (OBD) capable
  • Designed for +85°C/85% relative humidity reliability testing
  • Mature technology
  • Wettable flanks package available
  • AEC-Q100 qualified, high-reliability design

Specifications

  • Temperature
    • 0.1°C low, 0.07°C medium, and 0.04°C high repeatability
    • 0.01°C resolution
    • 2s response time
    • <0.03°C/y typical long-term drift
  • Electrical
    • 0.7V to 2.3V power-up/down level
    • Supply current (no heater)
      • 18µA typical idle state
      • 500µA maximum measurement, 320µA typical
      • 18µA to 20µA typical average repeatability range
    • 390Ω or 820Ω minimum pull-up resistors
    • 0.4V maximum low-level output voltage
    • 340pF or 400pF maximum cap bus load range
    • ±100mA latch-up at +125°C, JESD78 Class II
  • Timing
    • 1ms maximum power-up time, 0.3ms typical
    • 1ms maximum soft reset time
    • Measurement duration
      • 1.6ms maximum low repeatability, 1.3ms typical
      • 4.5ms maximum medium repeatability, 3.7ms typical
      • 8.3ms maximum high repeatability, 6.9ms typical
    • Heater-on duration
      • 0.81s to 1.19s long pulse range
      • 0.08s to 0.12s short pulse range
  • ESD
    • 4kV human-body model
    • 750V charged device model

Functional Block Diagram

Block Diagram - Sensirion STS41A AEC-Q100 Digital Temperature Sensors

Additional Resources

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Published: 2022-09-02 | Updated: 2025-10-21