Datasheet - Willow Technologies

MAGNETIC FIELD SENSOR
YAS537 MS-3T
1.2mm×1.2mm WLCSP8
Preliminary
3-AXIS MAGNETIC FIELD SENSOR
Simple & Accurate
POWER
Mounting area is minimized by the smallest package size and the minimum
peripheral components.
Ultra low power consumption can be realized by 1.8V single power supply and
optimization of the internal circuit.
4.00
1.8V
1.
2.
3.
4.
5.
6.
7.
Ap p l i c a t i o n D i a gr a m
Power-On
Reset
Voltage
Regulator
Host CPU
I2C Master
0.3μT/count
[email protected]
P a c ka ge
A/D
Converter
Serial Data
Interface
(Regisers)
Power Down
Control
VDD
WLCSP8 Package
0.2mm
0.4mm
0.4mm
0.2mm
VDD18
VSS
SCL
SDA
INT
0.2mm
Clock
Generator
1.8V
SDA
N.C.
VDD18
0.4mm
Temperature
Sensor
2000μT
SCL
VSS
0.4mm
Magnetic
Sensor‘Y2’Axis
ACQUISITION
Power Consumption in Measurement: 4mA
Measurement Time (Mag.&Temp.): 1.3msec.
Package: 1.2mm x 1.2mm WLCSP8
0.2mm
Magnetic
Sensor‘Y1’Axis
Pre
Amplifier
x74
RESOLUTION
3-Axis Magnetic Field Sensor, LNA and ADC are Packaged in 1 Chip
I2C External I/F Supports 400kHz Fast Mode
Repeated Data Acquisition Mode & Measurement Completion Interrupt Mode
1.8V Single Power Supply Operation
Automatic Power Down Function After Measurement Completion
Sensor Driver With Soft-Iron Effect Compensation Algorithm
Best-In-Class Ultra Low Power 1chip Magnetic Field Sensor
Supply Power Voltage: 1.8V (single)
Dynamic Range: 2000μT
Sensitivity: 0.3μT/count
Magnetic
Sensor‘X’Axis
4mA
only
INTENSITY
4.00
Fe a t u r e s & Sp e c s.
Ta r ge t Ap p l i c a t i o n s
1. Smartphone
2. Tablet Computer
3. Mobile GPS Device
CURRENT
INT
N.C.
VDD
Top View
This is a preliminary information, and subject to change without notice. Please refer to the latest information for your design.
YAS537
MAGNETIC FIELD SENSOR
Low Power Operation
I n d u s t r y’ s S m a l l e s t
• Tiny 1.2 mm × 1.2 mm package
36% footprint reduction in chip packaging over our
previous generation (YAS532 MS-3R) device makes
YAS537 one of the smallest on the market.
• Industry's smallest e-compass
The chip needs just three additional components for
complete e-compass subsystem making it the
industry's smallest e-compass which easily fits even in
today's densely populated smartphone PCBs.
• Faster sampling / Self power down
New low noise high sensitivity sensor element makes
sampling faster and its duty cycle lower making the
self power down control more effective to reduce the
operating current.
• Single 1.8 V supply operation
Our sensor element technology allows lower voltage
across the sensor bridge and the whole chip runs off a
single 1.8 V supply, helping to achieve unmatched
low power operation.
Sof t Ir on E r r or Fr e e
C o n f i gu r a b l e S e l f Ti m e d S a m p l i n g
• Repeated periodic sampling
Built-in sequencer runs by itself, samples, and
updates data at configured interval offloading the
host processor which just reads out the current values
at its convenient time.
• New-data-ready interrupt
Doing repeated periodic sampling with this host
interrupt makes getting sample sequences at a precise
interval easy without using any host timer resources.
• Configurable averaging
How raw sensor element outputs are averaged can be
configured differently for different applications
allowing high frequency spurious to be removed to
show the underlying signal.
• Unique algorithm to dynamically adjust soft iron error
Also provided is our YAS537 device driver software
specifically equipped with an algorithm to keep
adjusting for changing soft iron distortion.
This allows the users to run e-compass applications
correctly on portable devices even if their
construction use some soft iron materials.
YAS537 Specification [Preliminary]
Recommended Operating Condition
Parameter
Supply Voltage (VDD)
Supply Voltage (VDD18)
Operating Ambient Temperature
Power supply ramp up time
Characteristics
Parameter
Standby Current (TOP=25℃)
Current drawn from VDD during
magnetic field acquisition
Current drawn from VDD during
temperature acquisition
Current drawn during standby
(Repeated data acquisition)
Maximum Measurable Magnetic Field
Magnetic Field Sensitivity(X,Y,Z)
Sensitivity Axis Deviation
Temperature Acquisition Range
Temperature Resolution
Acquisition Time
Initialization Time after all power
supplies reach the operating ranges
Symbol
VVDD
VVDD18
TOP
TVON
Min.
Symbol
Min.
Typ.
1.65
1.65
-40
0.01
Max.
1.8
1.8
25
Typ.
Unit
3.6
1.95
85
50
Max.
V
V
o
C
ms
Unit
μA
1.5 (TBD)
4
mA
1.5
mA
10
μA
2000
0.3
μT
μT/count
±5
85
-40
0.05
1.3
TDOP
Semiconductor Div. 203 Matsunoki-jima,Iwata,Shizuoka 438-0192 Japan
http://www.yamaha.co.jp/english/product/lsi/
o
C
C/count
ms
o
4
ms
Customer Service
・The content is subject to change without notice.
Head Quarter
TEL : +81-539-62-4918
・Unauthorized use of this document is prohibited.
Shanghai Office TEL : +86-21-6247-2211
・These introductory information cannot be used for designs.
Seoul Office
TEL : +82-2-3467-330
Check with us for technical ones.
Taipei Office
TEL : +886-2-2571-5956
・Brand and product names used are trademarks of their
Mail (English) : [email protected] respective holders.
Created in Feb. 2014
Document Code: PBAS537A-000-01-e
This is a preliminary information, and subject to change without notice. Please refer to the latest information for your design.