LISY300AL STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 13
Technical content
Datasheet sections
- 1 Block diagram and pin description
- 1.1 Pin description
- 2 Mechanical and electrical specifications
- 2.1 Mechanical characteristics
- 2.2 Electrical characteristics
- 2.3 Absolute maximum ratings
- 2.4 Terminology
- 2.4.1 Sensitivity
- 2.4.2 Zero-rate level
- 2.4.3 Self-test
- 3 Application hints
- 3.1 Soldering information
- 4 Package information
- 5 Revision history
Features
■ 2.7 V to 3.6 V single supply operation ■ Low power consumption ■ Embedded power-down ■ ±300 °/s full scale ■ Absolute analog rate output ■ Integrated low-pass filters ■ Embedded self-test ■ High shock survivability ■ ECOPACK® RoHS and “Green” compliant (see Section 4)
Description
The LISY300AL is a low-power single-axis yaw rate sensor. It includes a sensing element and an IC interface able to provide the measured angular rate to the external world through an analog output voltage. The sensing element, capable of detecting the yaw rate, is manufactured using a dedicated micromachining process developed by ST to produce inertial sensors and actuators on silicon wafers. The IC interface is manufactured using a CMOS process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics. The LISY300AL has a full scale of ±300 °/s and is capable of measuring rates with a -3 dB bandwidth up to 88 Hz. The LISY300AL is available in a plastic land grid array (LGA) package and can operate within a temperature range from -40 °C to +85 °C. The LISY300AL belongs to a family of products suitable for a variety of applications, including: – Gaming and virtual reality input devices – Motion control with MMI (man-machine interface) – Image stabilization for digital video and digital still cameras – GPS navigation systems – Appliances and robotics LGA-28 (7x7x1.5mm) Table 1. Device summary
1 Block diagram and pin description
Figure 1. Block diagram sensing signal is filtered and appears as an analog signal at the output.
1.1 Pin description
Figure 2. Pin connection
Table 2. Pin description
1 NC Internally not connected
2 GND 0V supply
3 GND 0V supply
4 NC Internally not connected
5 CACT Active filter capacitor
6 ANALOG
10 PD Power-down (logic 0: normal mode; logic 1: power-down mode)
11 ST Self-test (logic 0: normal mode; logic 1: self-test)
22 NC Internally not connected
23 VCONT PLL filter connection pad #1
24 FILTVDD PLL filter connection pad #2
25 Vdd Power supply
26 Vdd Power supply
27 Vdd Power supply
28 NC Internally not connected
2 Mechanical and electrical specifications
2.1 Mechanical characteristics
Table 3. Mechanical characteristics @ Vdd = 3.3 V, T = 25 °C unless otherwise noted(1)
- The product is factory calibrated at 3.3 V. The operational power supply range is specified in Table 4.
- Typical specificat ions are not guaranteed
- The product is capable of sensing angular rate s extending from DC to the selected bandwidth
- User selectable by external capacitor C ACT
- “Self-test output voltage change” is defined as Vout (Vst = logic 1) - Vout(Vst = logic 0)
2.2 Electrical characteristics
Table 4. Electrical characteristics @ Vdd =3.3 V, T=25 °C unless otherwise noted (1)
- The product is factory calibrated at 3.3 V
- Typical specificat ions are not guaranteed
- Referred to ANALOG OUTPUT pin #6
2.3 Absolute maximum ratings
Table 5. Absolute maximum ratings
Mechanical and electrical specifications LISY300AL
2.4 Terminology
2.4.1 Sensitivity
A yaw rate gyroscope is a Z-axis rate device that produces a positive-going output voltage for counterclockwise rotation around the axis normal to the package top. 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 also very little over time.
2.4.2 Zero-rate level
Zero-rate level describes the actual output signal if there is no angular rate present. For a 3.3 V powered sensor the absolute zero-rate output is ideally 1.65 V. 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 also very little over time.
2.4.3 Self-test
Self-test allows to test the mechanical and electric 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 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 specification.
3 Application hints
Figure 3. LISY300AL electrical connections and external components values should be placed as near as possible to the device (common design practice).
summarizes the PLL low-pass filter components’ values.
3.1 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. Table 6. PLL low-pass filter components’ values
4 Package information
ECOPACK® specifications are available at: www.st.com. Figure 4. LGA-28: mechanical data and package dimensions
5 Revision history
Table 7. Document revision history