AKM’s (Asahi Kesai) EM-3242 non-contact magnet angular sensor detects the absolute angular position of a small magnet that is positioned above the device surface. The sensor has a full 360 degree angle range with a 10bit resolution.

The sensor incorporates IMC (Integrated Magnetic Concentrator) and CMOS Hall devices to sense the magnetic field vector along with the circuitry to convert the Hall sensor signal to an analog voltage proportional to the angle position of the magnet. The sensor is packaged in a very small 6 pin SOIC which is one on the smallest integrated angle sensors on the market. Only one external component is required for operation (a 0.1µF bypass capacitor). The EM-3242 is a low power sensor requiring 2.7 to 3.3V and 8mA.

The EM-3242 has replaced the EM-3241 that is obsolete

The AKM (Asahi) AK8775, AK8776, AK8777B, AK8778B, AK8779A and AK8779B are low cost magnetic encoder IC’s that can provide digital outputs corresponding to the direction and number of poles from a rotating magnet.

Applications

Non-contact angle sensing for:

• Rotational direction system
• Incremental pulse encoder
• Mobile devices
• Jog dial