LPR4150AL Datasheet, PDF (10/14 Pages) STMicroelectronics – MEMS motion sensor: dual-axis pitch and roll ±1500 dps analog gyroscope

Application hints
5
Application hints
LPR4150AL
Figure 3. LPR4150AL electrical connections and external components values
:_Y
4/06)%7
$)2%#4)/./&4(%
$%4%#4!",%
!.'5,!22!4%3
:_X
'.$
6DD
'.$ '.$
—& N&
.OTAMPLIFIED
FILTEREDOUTPUT8
2
#


# ^.#
.#
2
.#
'.$
6REF
.# 
2ECOMENDED /PTIONAL

,OW PASSFILTER (IGH PASSFILTER
4YPICALVALUES
2-/HM
#U&
2K/HM
#N&TOU&
2K/HM
#U&
#N&

'.^$^
,02!^&),,^46$$
4OP6IEW
&),4).9
&),46$$
6#/.4
&),4/549/54^9 ^.#

#
2
6REF
.OTAMPLIFIED
FILTEREDOUTPUT9
2
#
'.$
#
6DD
#
&),4 6$$
2
6#/.4
$IGITALSIGNALS
!-V
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 LPR4150AL allows band limiting of the output rate response through the use of an
external low-pass filter (recommended) in addition to the embedded low-pass filter
(f_t = 140 Hz).
4xOUTX and 4xOUTY are, respectively, OUTX and OUTY amplified output lines, internally
buffered to ensure low output impedance.
If external low-pass filtering is not applied, it is mandatory to short-circuit pin 1 to pin 5 and
pin 16 to pin 20, respectively, when amplified outputs are used.
When only a non-amplified output is used (OUTX/OUTZ), it is recommended to set pin 5
and 16 to a fixed reference voltage (Vref).
The LPR4150AL IC includes a PLL (phase-locked loop) circuit to synchronize driving and
sensing interfaces. Capacitors and resistors must be added at the FILTVDD and VCONT
pins (as shown in Figure 3) to implement a low-pass filter.
10/14
Doc ID 16576 Rev 1