YAS526C Datasheet, PDF (5/10 Pages) YAMAHA CORPORATION – MS-2 Magnetic field Sensor

YAS526C
„ ^{Function Descriptions}
z ^{Analog Circuit Section}
○ ^{Magnetic Sensor}
YAS526C includes three Magnetic Sensors.
Only the sensor of an axis to measure at the time of magnetic field measurement is operated.
○ ^{Buffer Amplifier}
The buffer amplifier amplifies a signal output from the bridge of magnetic sensor.
The amplifier operates only when magnetic field measurement is made.
○ ^{Temperature Sensor}
The temperature sensor is a sensor using band gap and in Z chip.
The sensor operates only when temperature is measured.
○ ^{A/D Converter (ADC)}
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.
○ ^{Analog External Input A/D}
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.
○ ^{Clock Generator}
The clock generator supplies clocks for ADC and digital circuits.
The generator operates only when the measurements is made.
○ ^{Power-on Reset}
The Power-on Reset circuit detects a rising of supply voltage for the core and initializes
circuits.
○ ^{Initialization Coil}
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.
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