SI7053-A20-IMR is a high-performance, low-power digital temperature sensor launched by Silicon Labs. It has a typical measurement accuracy of ±0.1°C and communicates data through the I²C interface. The device uses a miniature DFN-6 (3x3 mm) package, which is suitable for surface mount (SMD) technology and is suitable for systems with limited space but strict accuracy requirements. It integrates high-resolution ADC, temperature-sensitive components, calibration data, and I²C interface control logic, which can greatly simplify the system and optimize power consumption for designers.
Main technical parameters
Parameter category Detailed specification
Temperature range –40°C to +125°C
Temperature accuracy ±0.1°C (0°C to 70°C typical)
Interface type I²C (supports standard mode and fast mode, up to 400kHz)
Supply voltage 1.9V ~ 3.6V
Resolution 14-bit (configurable: 9-bit ~ 14-bit)
Power consumption characteristics Typical value 195nA (idle), 0.3 µA (1Hz sampling)
Package type DFN-6 (3mm x 3mm) surface mount type
Response time Less than 2 seconds (in air)
Calibration support Factory pre-calibration, no user secondary calibration required
Built-in functions CRC check, alarm threshold setting, command control register, etc.
Product features
✅ Ultra-high accuracy SI7053 provides high measurement accuracy of ±0.1°C, meeting high-demand applications such as medical and precision control. ✅ Low power design Only about 195nA is required in idle state, which is very suitable for battery-powered or ultra-low power standby systems. ✅ Simplified system design No additional external calibration components, filters or compensation devices are required, and factory pre-calibration can be used accurately. ✅ Stable and reliable With excellent temperature linearity and long-term stability, it is suitable for long-term deployment in industrial and medical fields. ✅ Digital output interface The I²C interface is simple, supports multiple control commands, and is compatible with mainstream microcontrollers and system chips.
Pin distribution and description (DFN-6)
Pin number Pin name Function description 1 GND Ground 2 SDA I²C data line 3 SCL I²C clock line 4 NC Reserved unconnected (can be left floating) 5 VDD Power input (1.9V ~ 3.6V) 6 NC Reserved unconnected Note: In order to better improve EMI immunity, it is recommended to ground or shield the NC pin during PCB design.
Typical application areas
Medical equipment (body temperature monitoring, portable diagnostic instruments)
Industrial automation systems
Data center environmental monitoring
Smart home and building automation
Portable consumer electronics (such as sports bracelets, environmental monitors)
Warehouse and cold chain transportation temperature monitoring
Circuit design suggestions
Power supply filtering: It is recommended to add 0.1µF and 1µF capacitors to the VDD input to stabilize the power supply.
I²C bus protection: It is recommended to add pull-up resistors (4.7kΩ - 10kΩ) to the SDA/SCL lines, and add TVS tube protection in high-interference environments.
Placement: In order to improve the temperature measurement response speed, the sensor should be placed away from the heating element and in an area with smooth airflow.
Energy saving control: The sleep mode and periodic wake-up can be controlled by the MCU to achieve system-level energy saving.
Equivalent models and compatible products recommended
Model Manufacturer Features
SI7051-A20-IMR Silicon Labs Accuracy ±0.1°C, slightly lower price, no CRC support
TMP117IDRVR Texas Instruments Low power consumption, ±0.1°C accuracy, I2C interface
SHT31-DIS-B Sensirion also supports I2C output, with humidity monitoring
ADT7420 Analog Devices High accuracy ±0.1°C, 16-bit output resolution
Summary
SI7053-A20-IMR is a digital temperature sensor with high integration, excellent accuracy and standardized interface. It has great application potential in various power-sensitive scenarios that require precise temperature control. Its stability, size advantage and industrial-grade reliability make it widely used in medical equipment, industrial control and environmental monitoring.
