AK09911C

The Asahi Kasei Microdevices (AKM) AK09911C is a compact 3-axis electronic compass IC engineered with high-sensitivity Hall sensor technology. This device is well-suited for pedestrian navigation systems in portable appliances, enabling electronic map applications to orient the map according to the user's direction.

Key features include a 3-axis magnetometer with a wide measurement range of ±4.9mT and a high resolution of 14-bit (0.6 µT/LSB). It communicates via an I2C bus interface, supporting Standard, Fast, and High-speed modes up to 2.5 MHz. The IC operates within a temperature range of -30°C to +85°C and requires an analog supply voltage between 2.4V and 3.6V.

The AK09911C is housed in an 8-pin WL-CSP (WLCSP) package measuring just 1.2 mm x 1.2 mm x 0.5 mm, making it one of the world's smallest electronic compasses. This small footprint and thin profile are ideal for space-constrained portable devices. The device integrates a self-test function for verifying magnetic sensor operation and includes a DRDY function to signal when measurement data is ready.

This electronic compass IC is designed for efficient operation, with a typical average current consumption of 2.4 mA at a 100 Hz repetition rate and a low power-down current of 3 µA. Its one-chip architecture, featuring Si monolithic Hall elements and a magnetic concentrator, ensures superior performance and eliminates orthogonal imprecision common in multi-chip modules.