LYPR540AH
MEMS motion sensor:
3 axis analog output gyroscope
Preliminary data
Features
■
Analog supply voltage 2.7 V to 3.6 V
■
Wide extended operating temperature range
(-40°C to 85°C)
■
3 indipendent angular rate channels
■
±400 dps and ±1600 dps full-scale
■
High shock survivability
■
Embedded self-test
■
ECOPACK® RoHS and “Green” compliant
(see Section 5)
LGA-28L (4.4x7.5x1.1 mm)
Application
■
Motion and man machine interface
■
Gaming and virtual reality input devices
■
Fitness and wellness
■
Pointing device and remote controllers
■
Industrial and robotics
■
Personal navigation devices
ST 3 axis gyroscope family leverages on robust
and mature manufacturing process already used
for the production of hundreds milion
micromachined accelerometers with excellent
acceptance from the market.
Sensing element is manufactured using
specialized micromachining processes, while the
IC interfaces are realized using a CMOS
technology that allows to design a dedicated
circuit which is trimmed to better match the
sensing element characteristics.
Description
The LYPR540AH is a three axis yaw, pitch and roll
analog gyroscope featuring three separate analog
output channels.
The LYPR540AH is available 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 sensors in plastic
LGA package.
LYPR540AH provides amplified (±400 dps full
scale) and not amplified (±1600 dps full scale)
outputs for each sensible axis available at the
same time through dedicated pins, and is capable
of detecting rates with a -3 dB bandwidth up to
140 Hz.
Table 1.
Device summary
Order code
Temperature range [°C]
Package
Packing
LYPR540AH
-40 to +85
LGA-28L
Tray
LYPR540AHTR
-40 to +85
LGA-28L
Tape and reel
November 2009
Doc ID 16747 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/12
www.st.com
12
Contents
LYPR540AH
Contents
1
2
3
4
Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Module specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2
Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2
Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
Doc ID 16747 Rev 1
LYPR540AH
Block diagram and pin description
1
Block diagram and pin description
1.1
Block diagram
Figure 1.
Block diagram
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Doc ID 16747 Rev 1
3/12
Block diagram and pin description
Table 2.
4/12
LYPR540AH
Pin description
Pin#
Name
Function
1-7
NC
8
Reserved
9
ST
Self tets (logic 0: normal mode; logic 1: self test)
10
NC
Internally not connected
11
GND
12
VCONT_1G
PLL filter connection
13
VCONT_2G
PLL filter connection
14
FILTVDD_2G
PLL filter connection
15
4xZ
Z amplified output
16
4xY
Y amplified output
17
4xX
X amplified output
18
NC
Internally not connected
19
NC
Internally not connected
20
Z
Z not amplified output
21
Y
Y not amplified output
22
X
X not amplified output
23
Reserved
Connect to GND
24-27
Reserved
Connect to VDD
28
VDD
Internally not connected
Connect to GND
0V supply voltage
Power supply
Doc ID 16747 Rev 1
LYPR540AH
Module specifications
2
Module specifications
2.1
Mechanical characteristics
Vdd = 3V, T = 25 °C unless otherwise noted(a)
Table 3.
Symbol
Mechanical characteristics
Parameter
FS
FSA
Measurement range
So
SoA
Sensitivity
Test conditions
Min.
Typ.(1)
Not amplified output (X,Y,Z)
±1600
Amplified output
(4xX,4xY,4xZ)
±400
Not amplified output (X,Y,Z)
0.8
Amplified output
(4xX,4xY,4xZ)
3.2
Max.
Unit
dps
mV/dps
SoDr
Sensitivity change vs.
temperature
0.07
%/°C
Voff
Zero-rate level
1.5
V
Zero rate level drift over
temperature
0.08
dps/°C
VoffDR
NL
Non linearity(2)
±1
% FS
BW
Bandwidth(3)
140
Hz
Rn
Rate noise density
0.02
dps/√Hz
Top
Operating temperature range
Best fit straight line
-40
+85
°C
1. Typical specifications are not guaranteed.
2. Guaranteed by design.
3. The product is capable of measuring angular rates extending from DC to the selected BW.
a. The product is factory calibrated at 3 V. The operational power supply range is from 2.7 V to 3.6 V.
Doc ID 16747 Rev 1
5/12
Module specifications
2.2
LYPR540AH
Electrical characteristics
Vdd = 3 V, T = 25 °C unless otherwise noted
Table 4.
Symbol
Electrical characteristics
Parameter
Vdd
Supply voltage
Idd
Supply current
VST
Self-test input
Top
Test conditions
Typ.(1)
Max.
Unit
2.7
3
3.6
V
10.8
mA
Logic 0 level
0
0.2*Vdd
Logic 1 level
0.8*Vdd
Vdd
-40
+85
V
Operating temperature range
1. Typical specifications are not guaranteed.
6/12
Min.
Doc ID 16747 Rev 1
°C
LYPR540AH
2.3
Module specifications
Absolute maximum ratings
Stresses above those listed as “absolute maximum ratings” may cause permanent damage
to the device. This is a stress rating only and functional operation of the device under these
conditions is not implied. Exposure to maximum rating conditions for extended periods may
affect device reliability.
Table 5.
Absolute maximum ratings
Symbol
Ratings
Vdd
Supply voltage
Vin
Input voltage on any control pin (ST)
A
Maximum value
Unit
-0.3 to 6
V
-0.3 to Vdd +0.3
V
3000 for 0.5 ms
g
10000 for 0.1 ms
g
-40 to +125
°C
2 (HBM)TBC
kV
Acceleration
TSTG
Storage temperature range
ESD
Electrostatic discharge protection
This is a mechanical shock sensitive device, improper handling can cause permanent
damages to the part
This is an ESD sensitive device, improper handling can cause permanent damages to
the part
Doc ID 16747 Rev 1
7/12
Terminology
3
Terminology
3.1
Sensitivity
LYPR540AH
An angular rate gyroscope is a device that produces a positive-going output voltage for
counterclockwise rotation around the sensitive axis considered. Sensitivity describes the
gain of the sensor and can be determined by applying a defined angular velocity to it. This
value changes very little over temperature and time.
3.2
Zero-rate level
Zero-rate level describes the actual output signal if there is no angular rate present. The
zero-rate level of precise MEMS sensors is, to some extent, a result of stress to the sensor
and therefore zero-rate level can slightly change after mounting the sensor onto a printed
circuit board or after exposing it to extensive mechanical stress. This value changes very
little over temperature and time.
3.3
Self-test
Self-test allows testing the mechanical and electrical part of the sensor, allowing the seismic
mass to be moved by means of an electrostatic test-force. The Self-test function is off when
the ST pin is connected to GND. When the ST pin is tied to Vdd, an actuation force is
applied to the sensor, emulating a definite Coriolis force. In this case the sensor output will
exhibit a voltage change in its DC level which is also depending on the supply voltage. When
ST is active, the device output level is given by the algebraic sum of the signals produced by
the angular velocity acting on the sensor and by the electrostatic test-force. If the output
signals change within the amplitude specified then the mechanical element is working
properly and the parameters of the interface chip are within the defined specification.
8/12
Doc ID 16747 Rev 1
LYPR540AH
4
Application hints
Application hints
Figure 3.
LYPR540AH electrical connection
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4.1
External capacitors
The device core is supplied through Vdd line. Power supply decoupling capacitors (C2=100
nF ceramic, C1=10 µF Al) should be placed as near as possible to the supply pin of the
device (common design practice).
All the voltage and ground supplies must be present at the same time to have proper
behavior of the IC (refer to Figure 3).
The LYPR540AH IC includes a PLL (phase-locked loop) circuit to synchronize driving and
sensing interfaces. Capacitors and resistors must be added at the FILTVDD_2G,
VCONT_2G, VCONT_1G pins (as shown in Figure 3) to implement a second-order lowpass filter.
4.2
Soldering information
The LGA package is compliant with the ECOPACK®, RoHS and “Green” standard.
It is qualified for soldering heat resistance according to JEDEC J-STD-020C.
Leave “pin 1 Indicator” unconnected during soldering.
Land pattern and soldering recommendation are available at www.st.com/
Doc ID 16747 Rev 1
9/12
Package information
5
LYPR540AH
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com. ECOPACK
is an ST trademark
Figure 4.
LGA-28L: mechanical data and package dimensions
mm
Dim.
Min.
A1
A2
A3
D1
E1
N1
L1
L2
P2
T1
T2
M
d
k
h
Typ.
Outline and
mechanical data
Max.
1.1
0.855
0.2
4.4
7.5
0.3
5.4
1.8
1.2
0.6
0.4
0.1
0.3
0.05
0.1
4.25
7.25
4.55
7.55
LGA-28L (4.4x7.5x1.1mm)
Land Grid Array Package
Pin 1 Indicator
hC
=
E1
k
k
C
d
A
L1
=
N1
P2
A3
L2
D1
D
M
kE
A2
E
kD
B
Seating
Plane
T1
A1
T2
K
TOP VIEW
8190050A
10/12
Doc ID 16747 Rev 1
LYPR540AH
6
Revision history
Revision history
Table 6.
Document revision history
Date
Revision
06-Nov-2009
1
Changes
Initial release.
Doc ID 16747 Rev 1
11/12
LYPR540AH
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