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December 2008

  Rev 1

1/8

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.

www.st.com

www.BDTIC.com/ST

Summary of Contents for LIS331AL

Page 1: ...celerometer 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 s...

Page 2: ...kit and the layout of the board are shown in Figure 1 and Figure 2 respectively and the full board photo of is provided in Figure 3 Figure 1 Demonstration board block diagram Voltage Regulator MEM S...

Page 3: ...UM0614 Demonstration kit description 3 8 Figure 2 Top silk screen board layout for the STEVAL MKI021V1 Figure 3 STEVAL MKI021V1 board photograph ref1 ref2 ON OFF www BDTIC com ST...

Page 4: ...s and the buffered signals available through two separate connectors J4 sensor output and J3 buffered output Specifically the three channels are made available from the left to right of the board in t...

Page 5: ...2 3 J3 VX VY VZ VOUT1 1 V 1 2 V 1 3 VCC 4 V 2 5 V 2 6 VOUT2 7 VOUT3 8 V 3 9 V 3 10 GND 11 V 4 12 V 4 13 VOUT4 14 TS924 U3 VoutX VoutY VoutZ VX VY VZ 1 2 3 J4 VoutZ VoutY VoutX 1 2 psr J2 Buffered Outp...

Page 6: ...I021V1 demonstration kit is provided in Table 1 Table 1 Bill of material Item Quantity Reference Value 1 2 C2 C4 100 nF 2 1 C1 2 2 F 3 3 Cx Cy Cz 4 7 nF 4 1 C3 10 F 5 4 R1 R2 R3 R4 10 k 6 3 J1 J2 J5 C...

Page 7: ...UM0614 Revision history 7 8 4 Revision history Table 2 Document revision history Date Revision Changes 15 Dec 2008 1 Initial release www BDTIC com ST...

Page 8: ...MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY...

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