STS41A Series Automotive-Grade Temperature Sensors

Product Highlights > STS41A Series Automotive-Grade Temperature Sensors

            STS41A Series Automotive-Grade Temperature Sensors
                    Sensirion temperature sensors feature wettable flanks for AOI compatibility and a wide voltage range
    

Image of Sensirion STS41A Series Temperature Sensors The Sensirion STS41A-AWLB and STS41A-BWLB are part of their fourth-generation STS4xA digital temperature sensor platform, engineered specifically for automotive environments. These sensors deliver high accuracy (±0.2°C typical), fast response times, and robust reliability in a compact 1.5 mm x 1.5 mm x 0.6 mm DFN package with wettable flanks, enabling automated optical inspection (AOI) during SMT assembly.

Built on their CMOSens® technology, the STS41A series integrates a 16-bit ADC, an I²C Fast Mode Plus interface, and an on-chip heater for advanced on-board diagnostics (OBD). The sensors operate across a wide temperature range of -40°C to +125°C and support supply voltages from 1.08 V to 3.6 V. Each unit is individually calibrated and traceable to NIST standards, ensuring consistent performance across production batches.

The AWLB and BWLB variants differ only in their I²C addresses (STS41A-AWLB: 0x44) (STS41A-BWLB: 0x45), allowing for multi-sensor integration on a single bus. Both parts meet AEC-Q100 qualification and have passed +85°C/85% RH accelerated life testing, making them ideal for demanding automotive applications.

Features

Typical temperature accuracy: ±0.2°C
Maximum temperature accuracy: ±0.4°C
Resolution: +0.01°C
2 s response time (τ63%)
Integrated heater for OBD
I²C Fast Mode Plus (up to 1 MHz)
CRC checksum support
Wettable flanks for AOI compatibility

Compact DFN package: 1.5 mm x 1.5 mm x 0.6 mm
Low power consumption: 18 µA average
Wide supply voltage range: 1.08 V to 3.6 V
Individually calibrated and NIST-traceable
AEC-Q100 qualified
Long-term drift less than +0.03°C/year
Unique serial number per device

Applications

Engine compartment temperature monitoring
Battery thermal management systems
Cabin climate control
HVAC systems
ADAS sensor thermal regulation
EV powertrain temperature sensing
Infotainment system thermal monitoring
LED module temperature control

Autonomous vehicle sensor diagnostics
ECU thermal diagnostics
Smart automotive lighting systems
In-cabin air quality systems
Cold chain logistics in automotive
Automotive data loggers
Sensor fusion systems