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YAS529
MS-3C
Magnetic field Sensor
„ Overview
YAS529 is the Triaxial Geomagnetic Sensor IC integrating buffer amplifier, A/D converter, clock generator,
and serial data interface circuit (supports I2C bus) on one chip package.
YAS529 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.
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.
Three A/D input pins for an inclination sensor
Power-down control of an inclination sensor with a standby pin by the use of the General-Purpose Output
(GPO) Pin
Others.
Manufacturing process ......................... CMOS + Magnetic Sensor
Package ................................................ Lead-free 10-pin WLCSP package (YAS529-PZ)
Supply voltage for core ........................ 2.5 V to 3.6 V
Supply voltage for Interface ................. 1.65 V to VDD (Operating temperature : -20 to +95 °C)
2.30 V to VDD (Operating temperature : -40 to +95 °C)
Operating temperature .......................... -40 to +95 °C (Supply for the interface : 2.30V to VDD)
Consumption current during operation.
Magnetic field measurement ....... 4 mA (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)
Measuring time
Magnetic sensor measurement .... within 10 ms (Three axes collective measurement)
Inclination sensor A/D ................ within 10 ms (Three axes collective measurement)
YAS529 CATALOG
CATALOG No.: LSI-BAS529A20
2007.6

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„ Pin Description
Here are figures for pin assignment and a table for pin descriptions.
YAS529
9876
10 5
1 234
10-pin WLCSP Top View
6789
5 10
4321
10-pin WLCSP Bottom View
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
Pin Name
GPO
VSS
AIZ
AIX
AIY
VDD
SDA
SCL
IOVDD
RSTN
I/O
O
-
A
A
A
-
I/Od
I
-
Is
Function
General-purpose output pin
Ground
A/D input 3
A/D input 1
A/D input 2
Power supply for core (Typ. 3 V)
Serial data
Serial clock
Power supply for interface (Typ. 1.8V)
Device initialization
Note)
Connecting AIZ to VDD is recommended when used by connecting a biaxial inclination sensor.
When the inclination sensor is not used, connecting AIX, AIY, and AIZ to VSS is recommended.
No Schmitt circuit is used for SCL and SDA input pins.
A : Analog input
I : Digital input
Is : Schmitt input
Od : Open drain output
O : Output
2

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YAS529
„ Pin Functions
z Power Supply (VDD, IOVDD, VSS)
These pins are for power supply of YAS529.
VDD
IOVDD
VSS
: Power Supply for core
: Power Supply for the Interface
: Ground
z Serial Data Interface (SCL, SDA, RSTN, GPO)
SCL
SDA
RSTN
GPO
: Serial clock input pin
These pins are used with an external pull-up resistor.
: Serial data input/output pin
These pins are used with an external pull-up resistor.
: Serial data interface reset pin
“L” releases I2C bus.
When not used, connect to IOVDD pin.
: General-purpose output pin
z Analog Input
AIX, AIY, AIZ : A/D input pin
Connecting AIZ to VDD is recommended when used by connecting a biaxial
inclination sensor.
When the inclination sensor is not used, connecting AIX, AIY, and AIZ to VSS is
recommended.
3