Datenblatt-pdf.com


LIS331AL Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer LIS331AL
Beschreibung MEMS inertial sensor
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 16 Seiten
LIS331AL Datasheet, Funktion
www.datasheet4u.com
LIS331AL
MEMS inertial sensor:
3-axis - ±2g analog output “nano” accelerometer
Features
Single voltage supply operation
±2.0g full-scale
Output voltage, offset and sensitivity are
ratiometric to the supply voltage
Factory trimmed device sensitivity and offset
Embedded self test
ECOPACK® lead-free compliant
High shock survivability (10000g)
Applications
Mobile terminals
Gaming and virtual reality input devices
Antitheft systems and Inertial Navigation
Appliance and robotics
Description
The LIS331AL is the smallest consumer low-
power three-axis linear accelerometer that
includes a sensing element and an IC interface
able to take the information from the sensing
element and to provide an analog signal to the
external world.
The sensing element, capable of detecting the
acceleration, is manufactured using a dedicated
LGA 16 (3x3x1.0mm)
process developed by ST to produce inertial
sensors and actuators in silicon.
The IC interface is manufactured using a CMOS
process that allows high level of integration to
design a dedicated circuit which is trimmed to
better match the sensing element characteristics.
The LIS331AL is capable of measuring
accelerations over a maximum bandwidth of
2.0kHz. The device bandwidth may be reduced by
using external capacitances. A self-test capability
allows the user to check the functioning of the
system.
The LIS331AL is available in Land Grid Array
package (LGA) and it is guaranteed to operate
over an extended temperature range of -40°C to
+85°C.
Table 1. Device summary
Order code
Temp range, ° C
LIS331AL
-40°C to +85°C
LIS331ALTR
-40°C to +85°C
Package
LGA-16
LGA-16
Note:
Tape & Reel parts are compliant to International Standard EIA-481.
Packing
Tray
Tape & Reel
September 2007
Rev 1
1/16
www.st.com
16






LIS331AL Datasheet, Funktion
Block diagram & pins description
LIS331AL
Table 2.
Pin #
www.datasheet4u.com
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin description
Pin name
Function
res Connect to Vdd
res Connect to Vdd
NC Not Connected
ST Self Test (Logic 0: normal mode; Logic 1: Self-Test mode)
PD Power Down (Logic 0: normal mode; Logic 1: Power-Down mode)
GND
0V supply
NC Not connected
NC
Voutz
Not connected
Output voltage Z channel
NC Not connected
Vouty
Output voltage Y channel
NC Not connected
Voutx
NC
Output voltage X channel
Not connected
res Connect to Vdd
Vdd Power supply
6/16

6 Page









LIS331AL pdf, datenblatt
Application hints
4 Application hints
LIS331AL
www.datasheet4u.com
Figure 3.
ST
PD
LIS331AL electrical connection
GND
100nF
GND
10µF
16 15 14
1
Cload x
13
2 LIS331AL 12 Cload y
3 (top view) 11
4 10 Cload z
5
678
9
Vdd
Optional
1 Pin 1 indicator
XY
Vout x
Z
Vout y (Top view)
Direction of the
detectable
Vout z accelerations
GND
Digital signals
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 LIS331AL allows to band limit Voutx, Vouty and Voutz through the use of external
capacitors. The recommended frequency range spans from DC up to 2.0 kHz. In particular,
capacitors are added at output Voutx, Vouty, Voutz pins to implement low-pass filtering for
antialiasing and noise reduction. The equation for the cut-off frequency (ft) of the external
filters is in this case:
ft
=
-----------------------------------1-------------------------------------
2π ⋅ Rout Cload(x, y, z)
Taking into account that the internal filtering resistor (Rout) has a nominal value equal to 32
k, the equation for the external filter cut-off frequency may be simplified as follows:
ft
=
---------------5---µ----F----------------
Cload(x, y, z)
[H
z
]
The tolerance of the internal resistor can vary typically of ±20% within its nominal value of 32
k; thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5 nF for
Cload(x, y, z) is required.
Table 6.
Filter capacitor selection, Cload (x,y,z)
Cut-off frequency
1 Hz
10 Hz
20 Hz
50 Hz
Capacitor value
5 µF
0.5µF
250nF
100nF
12/16

12 Page





SeitenGesamt 16 Seiten
PDF Download[ LIS331AL Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LIS331ALMEMS inertial sensorSTMicroelectronics
STMicroelectronics

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche