Sensors offer tamper detection for smart meters, precision motion sensing
Both sensors contain an AMR (Anisotropic Magneto-Resistive) magnetometer with high dynamic range of ±50 Gauss, which meets best-in-class benchmarks for resolution and low power consumption. Each also features an integrated temperature sensor, and provides a 16-bit digital output via a built-in I2C/SPI serial interface.
The ISM303DAC’s additional integrated low-noise 3-axis accelerometer with user-selectable full-scale range up to ±16g enables dual-mode magnetic/physical tamper detection. It also serves applications such as antenna pointing, positioning and navigation, robot guidance, and general industrial motion tracking or distance sensing. The magnetic and accelerometer blocks can be powered down independently to maximize energy savings.
Both devices can be configured to generate an interrupt signal for magnetic-field detection and automatically compensate for hard-iron offsets provided from the higher application layer. Additionally, the ISM303DAC can also generate interrupts upon recognition of freefall events, tap and double-tap, activity or inactivity, 6D-orientation thresholds, and wake-up events.
A built-in FIFO stores accelerometer data to minimize main-processor intervention and, as a result, reduce system power consumption. The IIS2MDC and ISM303DAC are available now in the leadless 2x2x0.7mm LGA-12 package.
STMicroelectronics – www.st.com
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