STEVAL-MKI034V1 STMicroelectronics, STEVAL-MKI034V1 Datasheet - Page 8

• Manufacturer Part Number: STEVAL-MKI034V1
• Description: EVAL BOARD FOR LPR510AL
• Manufacturer: STMicroelectronics
• Series: MEMSr

Specifications of STEVAL-MKI034V1

• Sensor Type: Gyroscope, 2 Axis
• Sensing Range: ±100°/sec
• Interface: Analog and Digital
• Sensitivity: 10mV/°/s
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: LPR510AL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Other names: 497-10366

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 LPR510AL 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 4xOUTY are respectively OUTX and OUTY 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 not-amplified outputs are used (OUTX/Y), it is suggested to set pads 5 and 9 to
fixed reference voltage (GND/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 LPR510AL 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 nF to 2.2 µF
filtered output Y
Not amplified
10kOhm
10nF
R1
LPR510AL electrical connections and external components 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 15811 Rev 2
C1
GND
GND
100 nF
1
5
GND
10 µF
LPR510AL
(Top View)
16
6
Vdd
14
8
13
9
+ Ω
C1
R1
Y
Vref
ST
HP
PD
(TOP VIEW)
DIRECTION OF THE
DETECTABLE
ANGULAR RATES
R2
C2
GND
filtered output X
LPR510AL
Not amplified
+ Ω
X