I2C interface humidity temperature sensor SILICON LABS SI7020-A20-GM1 for automotive climate control
Si7020-A20 I2C Humidity and Temperature Sensor
The Si7020 I2C Humidity and Temperature Sensor is a monolithic CMOS IC designed for accurate and low-power measurement of humidity, dew-point, and temperature. It integrates humidity and temperature sensor elements, an analog-to-digital converter, signal processing, and calibration data, all accessible via an I2C interface. The sensor utilizes patented technology with low-K polymeric dielectrics for humidity sensing, ensuring low drift, hysteresis, and excellent long-term stability. Factory-calibrated and stored in on-chip non-volatile memory, the sensors are fully interchangeable without recalibration. Available in a 3x3 mm DFN package, it's a drop-in upgrade for existing sensors, offering precision over a wider range and lower power consumption. An optional factory-installed cover provides protection during assembly and product life. Ideal for applications including HVAC/R, thermostats, respiratory therapy, white goods, indoor weather stations, micro-environments, automotive climate control, asset tracking, and mobile devices.
Product Attributes
- Brand: Silicon Laboratories
- Model: Si7020-A20
- Interface: I2C
- Package: 3x3 mm DFN
- Optional Cover: Yes (low-profile, hydrophobic/oleophobic, protects against liquids and particulates)
- Calibration: Factory-calibrated
- Origin: Not specified
- Material: Not specified
- Color: Not specified
- Certifications: Not specified
Technical Specifications
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Power Supply | VDD | 1.9 | 3.6 | V | ||
| Operating Temperature (I and Y grade) | TA | 40 | +125 | C | ||
| Operating Temperature (G grade) | TA | 40 | +85 | C | ||
| Precision Relative Humidity | 080% RH | 4% | RH (max) | |||
| High Accuracy Temperature | 10 to 85 C | 0.4 C | (max) | |||
| Operating Range RH | 0 | 100% | RH | |||
| Operating Range Temperature | 40 | +125 | C | |||
| Active Current | IDD | RH conversion in progress | 150 | 180 | A | |
| Standby Current (40 to +85 C) | IDD | No conversion or I2C transaction | 0.06 | 0.62 | A | |
| Standby Current (40 to +125 C) | IDD | No conversion or I2C transaction | 0.06 | 3.8 | A | |
| 12-bit RH Conversion Time | tCONV | 10 | 12 | ms | ||
| 14-bit Temperature Conversion Time | tCONV | 7 | 10.8 | ms | ||
| Powerup Time (to ready for conversion, 25 C) | tPU | 18 | 25 | ms | ||
| SCLK Frequency | fSCL | I2C Interface | 400 | kHz |
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