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PDF YAS526C Data sheet ( Hoja de datos )
| Número de pieza | YAS526C | |
| Descripción | Magnetic field Sensor | |
| Fabricantes | YAMAHA | |
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YAS526C
MS-2
Magnetic field Sensor
Overview
YAS526C is the Triaxial Geomagnetic Sensor IC integrating high sensitivity triaxial Magnetic Sensors, A/D
inputs for inclination sensors, temperature sensor for inclination sensor temperature characteristics correction,
Buffer Amplifiers, A/D Converters, Clock Generators, and Serial Data Interfaces (supports I2C) on a
multi-chip package.
YAS526C allows you to make up a high sensitive, compact and low-power electronic compass in a portable
GPS system or a mobile phone.
Features
● A manufacturing process that makes magnetic sensor on Si wafer with high precision realizes integration
with peripheral circuits on one chip.
● High sensitive geomagnetic sensor IC is realized by integrating magnetic sensors and low noise
amplifiers.
● Three A/D input pins for inclination sensor
● High noise immunity is improved by digitizing output from geomagnetic sensor IC.
● External interface supports I2C bus (100kbps/400kbps, slave mode).
● Geomagnetic sensor with superior high board density and low-power consumption.
● Automatic power-down control mode is available after geomagnetic measurements.
● Temperature sensor for inclination sensor temperature characteristics correction
● Others.
Manufacturing process .................................. CMOS + Magnetic Sensor
Package ......................................................... Lead-free 28-pin QFN package (YAS526C-QZ)
Supply voltage for Core ................................ 2.5 V to 3.6 V
Supply voltage for Interface .......................... 1.7 V to VDD
Operating temperature ................................... -20 to +85 °C
Power consumption during operation.
Magnetic field measurement ................. 27 mW (VDD = 3.0 V)
Inclination sensor A/D conversion ........ 6 mW (VDD = 3.0 V)
Magnetic sensor section
Measuring magnetic field range ........... ±300 µT
Resolution ............................................. ≦0.6 µT/count (X,Y), ≦1.2 µT/count (Z)
A/D input section
Input range ............................................ 0.5 V to 2.5 V
Resolution ............................................. 3.0 mV
Measuring time
Magnetic sensor measurement .............. within 8 ms (Three axes collective measurement)
Inclination sensor A/D .......................... within 4 ms (per 1 channel)
YAS526C CATALOG
CATALOG No.: LSI-BAS526C20
2007.6
1 page  
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.
5
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