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부품번호 | LY503ALH 기능 |
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기능 | MEMS motion sensor:high performance +-30 /s analog yaw-rate gyroscope | ||
제조업체 | STMicroelectronics | ||
로고 | |||
전체 12 페이지수
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LY503ALH
MEMS motion sensor:
high performance ±30 °/s analog yaw-rate gyroscope
Preliminary data
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
(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
■ Image stabilization for DVC and DSC
■ Image stabilization for camera phones
■ Motion controlled user interface
■ GPS navigation systems
Description
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).
Table 1. Device summary
Order code
Temperature range (°C)
LY503ALH
-40 to +85
LY503ALHTR
-40 to +85
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.
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
July 2009
Doc ID 15799 Rev 2
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
Block diagram and pin description
Table 2.
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
Pin description
Pin name
GND
FILTVDD
VCONT
Res
Res
Res
Vref
4xOUTZ
4xINZ
OUTZ
ST
PD
13
14,15
16
HP
Res
Vdd
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LY503ALH
Analog function
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
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)
Reserved. Connect to Vdd
Power supply
4/12 Doc ID 15799 Rev 2
4페이지 LY503ALH
3 Terminology
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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 LY503ALH 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.
Doc ID 15799 Rev 2
7/12
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LY503ALH | MEMS motion sensor:high performance +-30 /s analog yaw-rate gyroscope | STMicroelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |