STEVAL-MKI045V1 STMicroelectronics, STEVAL-MKI045V1 Datasheet - Page 8

• Manufacturer Part Number: STEVAL-MKI045V1
• Description: EVAL BOARD FOR LPY503AL
• Manufacturer: STMicroelectronics
• Series: MEMSr

Specifications of STEVAL-MKI045V1

• Sensor Type: Gyroscope, 2 Axis
• Sensing Range: ±30°/sec
• Interface: Analog
• Sensitivity: 33.3mV/°/s
• Embedded: No
• Utilized Ic / Part: LPY503AL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Other names: 497-10362

Application hints
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Application hints
Figure 3.
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 LPY503AL allows band limiting of the output rate response through the use of an
external low pass filter (suggested) and/or high pass filter (optional) in addition to the
embedded low pass filter (f
4xOUTX and 4xOUTZ are respectively OUTX and OUTZ amplified outputs lines, internally
buffered to ensure low output impedance.
If external high pass or low pass filtering is not applied it is mandatory to short-circuit
respectively pad 4 to pad 5 and pad 9 to pad 10 when amplified outputs are used.
When only outputs are used (OUTX/Z), it is suggested to set pads 5 and 9 to fixed reference
voltage (Vref).
When high pass filter is applied to not amplified output (OUTx), it is recommended to buffer
the line before entering ADC for performance optimization.
The LPY503AL 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
Typical values:
R1 = 1MOhm
C1 = 4.7 µF
R2 = 33kOhm
C2 = 2.2 µF to 2.2 µF
filtered output X
Not amplified
10kOhm
10nF
R1
LPY503AL electrical connections and external component values
Recomended
Low-pass filter
C2
GND
Figure
C1
C2
470nF
R2
3) to implement a low-pass filter.
Optional
High-pass filter
Vref
t
= 140 Hz).
R1
Doc ID 15804 Rev 2
C1
GND
GND
100 nF
1
5
GND
10 µF
LPY503AL
(Top View)
16
6
Vdd
14
8
13
9
C1
R1
Vref
ST
HP
PD
(TOP VIEW)
DIRECTION OF THE
DETECTABLE
ANGULAR RATES
R2
C2
GND
filtered output Z
+ Ω
Not amplified
LPY503AL
z
+ Ω
x