SI7210-B-04-IVR

The Si7210 family of Hall effect magnetic sensors from Silicon Labs offers high sensitivity and precision for various applications. This sensor integrates a Hall effect element with a low-noise analog amplifier, a 13-bit analog-to-digital converter (ADC), and an I2C interface. Digital signal processing is employed for precise compensation of temperature and offset drift, ensuring accurate measurements.

Key features include adjustable full-scale sensing ranges, with standard offerings at ±20mT and ±200mT. The high-precision 13-bit signal path delivers excellent linearity and low noise. The sensor operates over a wide voltage range of 1.7 to 5.5 V and consumes very low power, making it suitable for battery-powered devices. The integrated temperature sensor provides data via I2C with an accuracy of ±1°C.

This sensor is available in industry-standard SOT-23-5 packaging, suitable for surface-mount applications. Its capabilities make it ideal for mechanical position sensing in consumer and industrial applications, as a replacement for reed switches, fluid level measurement, speed sensing, utility meters, and control knobs.

The Si7210 family supports a bidirectional I2C interface for full configurability of operate and release points. The magnetic field strength can be read at any time through the I2C interface. With an output bandwidth up to 20 kHz and a sensitivity drift of less than ±5% over 0-70 °C, it provides reliable performance.