Preliminary data
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
July 2009 Doc ID 15809 Rev 2 1/12
12
LPY5150AL
MEMS motion sensor:
dual axis pitch and yaw ±1500°/s analog output gyroscope
Features
■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 for each axis
(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)
Applications
■Gaming applications
■Pointing devices, remote and game controllers
■Motion control with user interface
■Industrial and robotics
Description
The LPY5150AL is a low-power dual-axis
micromachined gyroscope capable of measuring
angular rate along pitch and yaw axes.
It provides excellent temperature stability and
high resolution over an extended operating
temperature range (-40 °C to +85 °C).
The LPY5150AL has a full scale of ±1500 °/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 continuous oscillating
movement and able to react when an angular rate
is applied based on the Coriolis principle.
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.
LPY5150AL 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.
LGA-16L (5x5x1.5mm)
Table 1. Device summary
Order code Temperature range (°C) Package Packing
LPY5150AL -40 to +85 LGA-16 (5x5x1.5) Tray
LPY5150ALTR -40 to +85 LGA-16 (5x5x1.5) Tape and reel
www.st.com
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Contents LPY5150AL
2/12 Doc ID 15809 Rev 2
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 High pass filter reset (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Output response vs. rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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LPY5150AL Block diagram and pin description
Doc ID 15809 Rev 2 3/12
1 Block diagram and pin description
Figure 1. Block diagram
1.1 Pin description
Figure 2. Pin connection
+
-
CLOCK
TRIMMING
CIRCUITS
REFERENCE
DEMODULATOR
CHARGE
AMPLIFIER
PHASE GENERATOR
SWITCHED
4x OUT X (amplified)
X/Z
LOW-PASS
CAPACITOR
FILTER
DRIVING MASS
DEMODULATOR
CHARGE
AMPLIFIER
SWITCHED
4x OUT Z(amplified)
LOW-PASS
CAPACITOR
FILTER
Optional
Filter
LP/HP
Optional
Filter
LP/HP
GAIN
GAIN
Not amplified
Not amplified
4x
4x
Feedback loop
+
-
+ Ω
X
+ Ω
z
filtered output X
filtered output Z
(TOP VIEW)
DIRECTION OF THE
DETECTABLE
ANGULAR RATES
GND
VCONT
4xINZ
FILTVDD
4xOUTX
Vref
OUTZ
ST
Vdd
Res
OUTX
4xINX
HP
1614
6
8
9
13 1
5
(BOTTOM VIEW)
Res
4xOUTZ
PD
+Ω x
+ Ω
z
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Block diagram and pin description LPY5150AL
4/12 Doc ID 15809 Rev 2
Table 2. Pin description
Pin # Pin name Analog function
1 GND 0V supply voltage
2 FILTVDD PLL filter connection pin #2
3 VCONT PLL filter connection pin #1
4 OUTX Not amplified output
5 4xINX Input of 4x amplifier
6 4xOUTX X rate signal output voltage (amplified)
7 Vref Reference voltage
8 4xOUTZ Z rate signal output voltage (amplified)
9 4xINZ Input of 4x amplifier
10 OUTZ Not amplified output
11 ST Self-test (logic 0: normal mode; logic 1: self-test)
12 PD Power-down (logic 0: normal mode; logic 1: power-down
mode)
13 HP High pass filter reset (logic 0: normal operation mode;
logic1: external high pass filter is reset)
14,15 Res Reserved. Connect to Vdd
16 Vdd Power supply
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LPY5150AL Mechanical and electrical specifications
Doc ID 15809 Rev 2 5/12
2 Mechanical and electrical specifications
2.1 Mechanical characteristics
Table 3. Mechanical characteristics @ Vdd = 3 V, T = 25 °C unless otherwise noted(1)
Symbol Parameter Test condition Min. Typ.(2) Max. Unit
FSA Measurement range 4x OUT (amplified) ±1500 °/s
FS OUT (not amplified) ±6000 °/s
SoA Sensitivity(3) 4x OUT (amplified) 0.67 mV/ °/s
So OUT (not amplified) 0.167 mV/ °/s
SoDr Sensitivity change vs
temperature Delta from 25°C 0.037 %/°C
Voff Zero-rate level(3) 1.23 V
Vref Reference voltage 1.23 V
OffDr Zero-rate level change
Vs temperature Delta from 25°C 0.25 °/s/°C
NL Non linearity Best fit straight line ±1 % FS
BW Bandwidth(4) 140 Hz
Rn Rate noise density 0.175 °/s /
Top Operating
temperature range -40 +85 °C
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.
Hz
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Mechanical and electrical specifications LPY5150AL
6/12 Doc ID 15809 Rev 2
2.2 Electrical characteristics
2.3 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 4. Electrical characteristics @ Vdd =3 V, T=25 °C unless otherwise noted(1)
Symbol Parameter Test condition Min. Typ.(2) Max. Unit
Vdd Supply voltage 2.7 3 3.6 V
Idd Supply current PD pin connected to GND 6.8 mA
IddPdn Supply current in
power-down mode PD pin connected to Vdd 1 5 µA
VST Self-test input Logic 0 level 0 0.2*Vdd V
Logic 1 level 0.8*Vdd Vdd
VPD Power-down input Logic 0 level 0 0.2*Vdd V
Logic 1 level 0.8*Vdd Vdd
To p Operating temperature
range -40 +85 °C
1. The product is factory calibrated at 3 V
2. Typical specifications are not guaranteed
Table 5. Absolute maximum ratings
Symbol Ratings Maximum value Unit
Vdd Supply voltage -0.3 to 6 V
Vin Input voltage on any control pin (PD, ST) -0.3 to Vdd +0.3 V
A Acceleration 3000 g for 0.5 ms
10000 g for 0.1 ms
TSTG Storage temperature range -40 to +125 °C
ESD Electrostatic discharge protection 2 (HBM) kV
This is a mechanical shock sensitive device, improper handling can cause permanent
damage to the part
This is an ESD sensitive device, improper handling can cause permanent damage to
the part
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LPY5150AL Terminology
Doc ID 15809 Rev 2 7/12
3 Terminology
3.1 Sensitivity
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 of 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 dependent on the supply voltage.
When ST is active, the device output level is given by the algebraic sum of the signals
produced by the velocity acting on the sensor and by the electrostatic test-force. If the output
signals change within the amplitude specified in Table 3, then the mechanical element is
working properly and the parameters of the interface chip are within the defined
specifications.
3.4 High pass filter reset (HP)
The LPY5150AL provides the possibility to reset the optional external high pass filter by
applying a high logic value to the HP pad. This procedure ensures faster response,
especially during overload conditions. Moreover, this operation is suggested each time the
device is powered.
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Application hints LPY5150AL
8/12 Doc ID 15809 Rev 2
4 Application hints
Figure 3. LPY5150AL electrical connections and external component values
Power supply decoupling capacitors (100 nF ceramic or polyester + 10 µF aluminum) should
be placed as near as possible to the device (common design practice).
The LPY5150AL allows band limiting of the output rate response through the use of an
external low pass filter (suggested) and/or high pass filter (optional) in addition to the
embedded low pass filter (ft = 140 Hz).
4xOUTX and 4xOUTZ are respectively OUTX and OUTZ amplified outputs lines, internally
buffered to ensure low output impedance.
If external high pass or low pass filtering is not applied it is mandatory to short-circuit
respectively pad 4 to pad 5 and pad 9 to pad 10 when amplified outputs are used.
When only outputs are used (OUTX/Z), it is suggested to set pads 5 and 9 to fixed reference
voltage (Vref).
When high pass filter is applied to not amplified output (OUTx), it is recommended to buffer
the line before entering ADC for performance optimization.
The LPY5150AL IC includes a PLL (phase locked loop) circuit to synchronize driving and
sensing interfaces. Capacitors and resistors must be added at the FILTVDD and VCONT
pins (as shown in Figure 3) to implement a low-pass filter.
100 nF
10kOhm 470nF
Vdd
GND
HP
Vref
4xOUTX
C2
R1 C1
GND
10 µF
GND
Recomended
Low-pass filter
LPY5150AL
(Top View)
1
16 14
13
9
86
5
10nF
PD
ST
GND
Vref
4xOUTZ
Optional
High-pass filter
Vref GND
Typical values:
C1
R1
C2
R2 C1
R1 C2
R2
R1 = 1MOhm
C1 = 4.7 µF
R2 = 33kOhm
C2 = 2.2 µF to 2.2 µF
Not amplified
(TOP VIEW)
DIRECTION OF THE
DETECTABLE
ANGULAR RATES
+Ω
x
filtered output X
Not amplified
filtered output Z
+ Ω
z
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LPY5150AL Application hints
Doc ID 15809 Rev 2 9/12
4.1 Output response vs. rotation
Figure 4. Output response vs. rotation
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 recommendations are available at www.st.com.
+Ω x
Steady State position:
4xOUTX = 4xOUTZ = 1.23V
OUTX = OUTZ = 1.23V
+Ω x
Positive rotations as indicated by arrows
+1500°/sec --> 4xOUTX, 4xOUTZ = 1.23V + SoA*1500 = 2.23V
+1500°/sec --> OUTX, OUTZ = 1.23V + So*1500 = 1.48V
increase output value over Zero rate level:
+ Ω
z
+ Ω
z
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Package information LPY5150AL
10/12 Doc ID 15809 Rev 2
5 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 5. LGA-16: mechanical data and package dimensions
A1 1.46 1.5 1.6 0.057 0.059 0.063
A2 1.33 0.052
A30.16 0.2 0.24 0.006 0.0080.009
C0.30.012
D1 4.85 5 5.15 0.191 0.197 0.203
E1 4.85 5 5.15 0.191 0.197 0.203
L0.80.031
L1 3.2 0.126
M 1.6 0.062
M1 2.15 2.175 2.20 0.0850.0860.087
M2 1.625 0.064
N 2.175 0.086
N1 2.4 0.094
T1 0.80.031
T2 0.475 0.5 0.525 0.019 0.020 0.021
R 1.2 1.6 0.047 0.063
S0.1 0.004
h 0.15 0.006
k 0.05 0.002
j 0.1 0.004
LGA-16 (5x5x1.5mm)
Land Grid Array Package
7887555A
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LPY5150AL
12/12 Doc ID 15809 Rev 2
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