LY503ALH
MEMS motion sensor:
high performance ±30 °/s analog yaw-rate gyroscope
Preliminary data
Features
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2.7 V to 3.6 V single-supply operation
Wide operating temperature range
(-40 °C to +85 °C)
High stability overtemperature
Analog absolute angular-rate output
Two separate outputs
(1x and 4x amplified)
Integrated low-pass filters
Low power consumption
Embedded power-down
Embedded self-test
High shock and vibration survivability
ECOPACK
®
RoHS and “Green” compliant
(see
Section 5)
LGA-16L (5x5x1.5mm)
The LY503ALH has a full scale of ±30 °/s and is
capable of detecting rates with a -3 dB bandwidth
up to 140 Hz. The gyroscope is the combination
of one actuator and one accelerometer integrated
in a single micromachined structure.
It includes a sensing element composed by single
driving mass, kept in continuos oscillating
movement and able to react when an angular rate
is applied based on the Coriolis principle.
Applications
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Image stabilization for DVC and DSC
Image stabilization for camera phones
Motion controlled user interface
GPS navigation systems
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Description
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A CMOS IC provides the measured angular rate
to the external world through an analog output
voltage, allowing high level of integration and
production trimming to better match sensing
element characteristics.
ST’s gyroscope family leverages on robust and
mature manufacturing process already used for
the production of micromachined accelerometers.
ST is already in the field with several hundreds
million sensors with excellent acceptance from
the market in terms of quality, reliability and
performance.
LY503ALH is provided in plastic land grid array
(LGA) package. Several years ago ST pioneered
successfully the usage of this package for
accelerometers. Today ST has the widest
manufacturing capability and strongest expertise
in the world for production of sensor in plastic
LGA package.
Package
LGA-16 (5x5x1.5)
LGA-16 (5x5x1.5)
Packing
Tray
Tape and reel
The LY503ALH is a low-power single-axis
micromachined gyroscope capable of measuring
angular rate along yaw axis.
It provides excellent temperature stability and
high resolution over an extended operating
temperature range (-40 °C to +85 °C).
Device summary
Temperature range (°C)
-40 to +85
-40 to +85
Order code
LY503ALH
LY503ALHTR
July 2009
Doc ID 15799 Rev 2
1/12
www.st.com
12
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
Contents
LY503ALH
Contents
1
Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
2.3
Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
3.2
3.3
3.4
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
High Pass filter reset (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1
4.2
Output response vs. rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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Doc ID 15799 Rev 2
Block diagram and pin description
LY503ALH
Table 2.
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14,15
16
Pin description
Pin name
GND
FILTVDD
VCONT
Res
Res
Res
Vref
4xOUTZ
4xINZ
OUTZ
ST
PD
HP
Res
Vdd
0V supply voltage
PLL filter connection pin #2
PLL filter connection pin #1
Leave unconnected
Leave unconnected
Leave unconnected
Reference voltage
Z rate signal output voltage (amplified)
Input of 4x amplifier
Not amplified output
Analog function
Self-test (logic 0: normal mode; logic 1: self-test)
Power-down (logic 0: normal mode; logic 1: power-down
mode)
High pass filter reset (logic 0: normal operation mode;
logic1: external high pass filter is reset)
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Reserved. Connect to Vdd
Power supply
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Doc ID 15799 Rev 2
LY503ALH
Mechanical and electrical specifications
2
2.1
Table 3.
Symbol
FSA
FS
SoA
So
SoDr
Voff
Vref
OffDr
NL
BW
Rn
Top
Mechanical and electrical specifications
Mechanical characteristics
Mechanical characteristics @ Vdd = 3 V, T = 25 °C unless otherwise noted
(1)
Parameter
Measurement range
Sensitivity
(3)
Sensitivity change vs
temperature
Zero-rate level
(3)
Reference voltage
Zero-rate level change
Delta from 25°C
Vs temperature
Non linearity
Bandwidth
(4)
Rate noise density
Operating
temperature range
Best fit straight line
Test condition
4x OUT (amplified)
OUT (not amplified)
4x OUT (amplified)
OUT (not amplified)
Delta from 25°C
Min.
Typ.
(2)
±30
±120
33.3
8.3
0.05
1.23
Max.
Unit
°/s
°/s
1. The product is factory calibrated at 3 V. The operational power supply range is specified in
Table 4.
2. Typical specifications are not guaranteed
3. Sensitivity and zero-rate level are not ratiometric to supply voltage
4. The product is capable of measuring angular rates extending from DC to the selected BW.
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0.014
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V
V
mV/ °/s
mV/ °/s
%/°C
°/s/°C
% FS
Hz
°/s / Hz
+85
°C
Doc ID 15799 Rev 2
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