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STS4L-AD1B-R3

SENSTS4L-AD1B-R3

Sensirion AG
Temperature Sensor Digital -40°C ~ 125°C 16 b 4-DFN (1.5x1.5)
Active9,935 in stock
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Overview

The STS4L-AD1B-R3 is an ultra-low-power digital temperature sensor designed for applications with extremely tight energy budgets. It operates on a supply voltage as low as 1.08V and consumes only 0.4 uA at a 1 Hz measurement rate. Housed in a compact 1.5mm x 1.5mm DFN package, it provides 16-bit resolution over a wide temperature range of -40C to 125C.

Why Choose This Part

This sensor offers industry-leading power efficiency with a standby current of only 80 nA, making it perfect for 'always-on' monitoring. Its wide supply range of 1.08V to 3.6V simplifies power tree design in modern low-voltage systems. The I2C interface and high 16-bit resolution ensure reliable digital communication and precise data acquisition without external ADC circuitry.

Applications

Battery-Powered IoT Nodes
Ideal for remote sensors where 1.8V or 3V coin cells must last for several years due to sub-microamp current draw.
Energy Harvesting Systems
The ultra-low 1.08V minimum operating voltage allows the sensor to run directly from solar or thermal harvesters without complex boost conversion.
Smart Building Automation
Used in wireless thermostats and HVAC monitoring points where small form factor and high accuracy are required.
Wearable Health Monitors
Provides precise ambient or skin temperature tracking in a footprint that fits within space-constrained wristbands and patches.

Key Specifications

Resolution 16 b
Output Type I2C
Sensor Type Digital
Mounting Type Surface Mount
Package / Case 4-UDFN Exposed Pad
Test Condition 25degC
Voltage - Supply 1.08V ~ 3.6V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 4-DFN (1.5x1.5)
Accuracy - Highest (Lowest) +/-0.2degC (+/-0.4degC)
Sensing Temperature - Local -40degC ~ 125degC

Getting Started

Integrate the sensor into your design using the I2C bus at address 0x44. Engineers can evaluate the platform using Sensirion SEK-SensorBridge and the associated SEK-STS4x evaluation kits. Ensure proper thermal isolation on the PCB by using thin traces and cutouts to prevent heat transfer from nearby power components to the DFN-4 package.

Also Consider

SHT40 SENSensirion AG - Consider this if your application also requires integrated relative humidity sensing in the same form factor.
TMP117 TITexas Instruments - Higher precision alternative for medical-grade applications requiring +/- 0.1C accuracy.

Categories

Sensors > Temperature Sensors IoT & Smart Devices > Smart Home & Building