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UM0614
User manual
STEVAL-MKI021V1
demonstration kit for the LIS331AL
Introduction
The STEVAL-MKI021V1 is a demonstration kit designed to provide the user with a
complete, ready-to-use platform for the evaluation of the LIS331AL. The LIS331AL is the
smallest consumer low-power 3-axis linear capacitive accelerometer. It includes a sensing
element and an IC interface capable of taking information from the sensing element and
providing an analog signal to an external application.
In addition to the MEMS sensor, the system includes a linear voltage regulator and a rail-to-
rail low noise quad amplifier configured as a non-inverting buffer, making both direct sensor
outputs and buffered sensor outputs available to the user.
The kit also provides an easy means to control the power-down and self-test pins.
December 2008
Rev 1
1/8
www.st.com
www.BDTIC.com/ST
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Summary of Contents for ST LIS331AL
- Page 1 Introduction The STEVAL-MKI021V1 is a demonstration kit designed to provide the user with a complete, ready-to-use platform for the evaluation of the LIS331AL. The LIS331AL is the smallest consumer low-power 3-axis linear capacitive accelerometer. It includes a sensing element and an IC interface capable of taking information from the sensing element and providing an analog signal to an external application.
- Page 2 2, respectively, and the full board photo of is provided in Figure Figure 1. Demonstration board block diagram 3.3V Voltag e MEM S Reg ulator Sen sor Outp ut B uffer Vo ut Sensor B uffer ed Ou tpu t Ou tput AM03283v1 www.BDTIC.com/ST...
- Page 3 UM0614 Demonstration kit description Figure 2. Top silk-screen board layout for the STEVAL-MKI021V1 Figure 3. STEVAL-MKI021V1 board photograph ref1 ref2 www.BDTIC.com/ST...
- Page 4 J1 (PS) with a DC voltage between 3.7 V and 18 V. The suggested supply voltage is 5 V. The typical current consumption of the LIS331AL MEMS sensor is 0.65 mA, while the typical current consumption of the whole board is in the range of 6 mA.
- Page 5 UM0614 Schematic diagram Schematic diagram Figure The schematic diagram of the STEVAL-MKI021V1 demonstration kit is shown in Figure 4. Schematic diagram for the STEVAL-MKI021V1 AM03284v1 www.BDTIC.com/ST...
- Page 6 The bill of material for STEVAL-MKI021V1 demonstration kit is provided in Table 1. Bill of material Item Quantity Reference Value C2,C4 100 nF 2.2 µF Cx,Cy,Cz 4.7 nF 10 µF R1, R2, R3, R4 10 kΩ J1, J2, J5 CON2 J3, J4, J6 CON3 LIS331AL LE33 TS924 www.BDTIC.com/ST...
- Page 7 UM0614 Revision history Revision history Table 2. Document revision history Date Revision Changes 15-Dec-2008 Initial release. www.BDTIC.com/ST...
- Page 8 No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein.
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