YAS526C

5

Function Descriptions

Analog Circuit Section

YAS526C includes three Magnetic Sensors.

Only the sensor of an axis to measure at the time of magnetic field measurement is operated.

The buffer amplifier amplifies a signal output from the bridge of magnetic sensor.

The amplifier operates only when magnetic field measurement is made.

The temperature sensor is a sensor using band gap and in Z chip.

The sensor operates only when temperature is measured.

The integrating A/D converter (ADC) using switched capacitor is mounted on YAS526C.

XY chip and Z chip has one each.

The ADC of XY chip has Magnetic field Rough Offset Measurement and Magnetic field

Normal Measurement modes.

The ADC of Z chip has Temperature Measurement and External Input Measurement modes in

addition to Magnetic field Rough Offset Measurement and Magnetic field Normal

Measurement modes.

The ADC operates only when measurement is performed.

The A/D measures values from analog external input.

Input range is from 0.5 to 2.5V. One count of A/D converter is about 3.0mV.

The clock generator supplies clocks for ADC and digital circuits.

The generator operates only when the measurements is made.

The Power-on Reset circuit detects a rising of supply voltage for the core and initializes

circuits.

The coils are used when the magnetic sensor cannot give original characteristics due to

receiving high magnetic field.

Generating magnetic field by the initialization coils initializes the magnetic sensor

characteristics.