Document
YAS525B
MS-1C
Magnetic field Sensor
Overview
YAS525B is the biaxial geomagnetic sensor IC integrating a high sensitivity biaxial magnetic sensor, a buffer amplifier, an AD converter (ADC), a clock generator, and serial data interface (supports I2C bus) on one chip. YAS525B 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 a Si wafer with high precision realizes integration with peripheral circuits.
● High sensitive geomagnetic sensor IC is realized by integrating a magnetic sensor and a low noise buffer amplifier.
● 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 measurements. ● Others.
Manufacturing process .......................... CMOS + Magnetic Sensor Package ................................................. Lead-free 8-ball WLCSP Package (YAS525B-WZ) Power supply voltage ............................ 2.5 ~ 3.3V Operating temperature .......................... -20 ~ +85°C Power consumption during operation ... 10mW (VDD=3.0V,when magnetic field is measured.) Magnetic sensor section
Measuring magnetic field range ... ±300µT Resolution ..................................... ≦0.6µT/count Measuring time ..................................... within 10ms/magnetic sensor mono-axial measurement
YAS525B CATALOG CATALOG No.: LSI-BAS525B21
2007.6
YAS525B
Pin Description
Here is a figure for pin assignment and a table for pin descriptions.
35 4
26 8
17
53 4
62 8
71
8Pin WLCSP Top View
8Pin WLCSP Bottom View
Pin Descriptions
Pin No. Name I/O
Function
1 T2
I+ Test input
(Use in non-connection)
2 VSS
- Ground
3 T1
I+ Test mode
(Use in non-connection)
4 SCL
Is Serial Clock
5 NC
- Non-connection
6 VDD
- Power supply (typ 3V)
7 NC
- Non-connection
8 SDA Is/Od Serial data
Note: Pin 1 and pin 3 are used in non-connection.
Pin 5 is connected to pin 7 in the chip.
I+ : Input with pull-up resistor Is : Schmitt trigger input Od : Open drain output
Pin Functions
z Power Supply (VDD, VSS)
These pins are for power supply of YAS525B.
z Serial Data Interface (SCL, SDA)
SCL - Serial clock input pin. This pin is used with an external pull-up register.
SDA - Serial data input/output pin. This pin is used with an external pull-up register.
z Others (T1, T2)
T1 - Test mode control pin. Use this pin in non-connection.
T2 - Test input pin. Use this pin in non-connection.
2
YAS525B
Block Diagram
Here is the internal block diagram of YAS525B.
X-axis Magnetic Sensor Initialization Coils
Y-axis Magnetic Sensor
Thermal Sensor
Buffer Amplifier
A/D Converter
Clock Generator
T1 T2
Power-down Controller
Serial Data Interface
(Registers)
Power-on Reset Circuit
Block Di.