ARC0000CE11

Gyro Sensors for General-Purpose/EWTS8RD/ EWTS8RS
Gyro Sensors for General-Purpose
SMD, Inclined Detection Axis Type
Type: EWTS8RD□□□/EWTS8RS□□□
MEMS gyro sensor for navigation using an inclined detection
axis. The inclination of the unit can be changed. This microsensor has high precision and reliability due to the sealing
around the bear chip IC and MEMS silicone based tuning
fork, formed with piezo-electric thin film directly on the
surface.
Features
● Compact,
Low-height 5.0 mm max.,
Low-profile 4.3 mm
● SMD type
● 3.3 V.DC operating voltage
● Detection axis 0 deg / 20 deg inclination
(Refer to the diagram on the right)
● Digital Output : SPI communication
● RoHS compliant
CCW(−w)
CW(+w)
CW(+w)
Y-axis
20 °
CCW(−w)
X-axis
Z-axis
Z-axis
X-axis
EWTS8RD□□□
EWTS8RS□□□
Recommended Applications
● Detects
the direction of movement for robot-cleaner
the direction of movement for car-navigation
● Detects the posture control for robot
● Detects
Ratings
● Electrical
● Environmental
Characteristics
Operating Voltage Range
Operating Temperature Range
Zero Point Output
(−40 °C to +85 °C)
Sensitivity (Z axis)
(−40 °C to +85 °C)
Dynamic Range
Frequency Response
Output Noise
Characteristics
3.3 V.DC±0.1.65 V.DC
Low Temperature Operation
–40 °C to +85 °C
High Temperature Operation
32768±800 LSB
Thermal Shock
50 LSB/ ° /s
Heat and Damp Cycling Test
±150 °/s
Life (Operating Durability)
–40 °C for 72 h
+85 °C for 120 h
–40 °C to +85 °C
for 25 cycles
–40 °C to +60 °C
90 %RH for 5 cycles
2 Hz, 1×107 cycles
−4.0 dB to 0 dB
< 20 LSB
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00
Jul. 2015
Gyro Sensors for General-Purpose/EWTS8RD/ EWTS8RS
Dimensions in mm (not to scale)
8.25
Tolerance : ±0.2 mm
4.30
Y-axis
X-axis
(7.4)
(3.02)
4.9±0.1
(0.85)
0.05±0.05
Z-axis
1234
5678
2.54±0.1
6-0.64±0.1
2-1.05
0.16
2-0.58
8-1.62
0.54
8-0.30±0.05
Terminal
1
CSB
2
SCLK
3
Reserved 1
4
GND
5
REG
6
Vcc
7
MISO
8
MOSI
9
CAP
J
CAP
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00
Jul. 2015
Gyro Sensors
Safety Precautions (Gyro sensor of General-Purpose/EWTS8R□□□□)
1. Soldering
(1) Thickness of Solder Paste (Recommendation) : 0.12 mm to 0.15 mm
(2) Flux
: Use non-corrosive rosin, and alcohol based solvent with little
chemical reaction.
(3) Pre-heat
: Control the temperature on PWB to be under 180 °C and no
longer than 120 s
(4) Reflow Soldering condition
: The Maximum temperature on PWB is 260 °C
(5) Atmospheric Temperature
: The atmospheric temperature should be under 300 °C
(6) Cooling
: To avoid deterioration of the sensor due to heat, immediately
cool the sensor with blown air.
(7) Number of times it can be Reflow Soldered : Once
(8) Hand soldering (recommendation)
: a) Use a 20 W or less soldering iron at less than 350 °C
b) Soldering time: within 3 s
2. Washing
Do not wash.
3. Handling
(1) Handle with care. Do not drop or apply any strong impact to the sensor this may degrade some performances.
(2) Do not store under the following conditions, they may degrade some performances and solderability.
a) Relative humidity of more than 85 %
b) Atmospheres of corrosive gas (CI2, H2S, NH3, NOX, SO2 etc.)
c) Long term storage of over 3 months after delivery
Do not store the package under severe load and stress.
4. Pattern layout of the circuit board
See the following recommended pattern design. (mm)
PART SIDE
J
Sensor outline
Center line
of sensor
Tolerance : ±0.1 mm
1.82
2-1.35
8-2.45
0.52
4-R0.45
1
16-R0.16
8-0.32
P0.635×3=1.91
23 4
9
5 6 78
2-1.20
2.54
No.
1
2
3
4
5
6
7
8
9
J
EWTS8RD□□□/EWTS8RS□□□ EWTS8RN□□□/EWTS8RK□□□
Connection
Connection
CSB
Connect to Vcc
SCLK
NC
NC
Vout
GND
GND
Capacitor to GND
Capacitor to GND
Vcc
Vcc
MISO
NC
MOSI
NC
Connect to GND
Connect to GND
Connect to GND
Connect to GND
5. Layout
The sensor has a little zero point temperature drift due to surrounding conditions. Take this into consideration
when determining the location of the sensor.
(1) Do not locate the sensor close to heat radiating
objects such as power transistors.
(2) Do not locate the sensor where it can be
affected by heat convection.
Sensor
Sensor
Heat radiating object
(ex. Power Tr)
Heat radiating object
(ex. Power Tr)
(3) Do not locate two or more sensors on the same PWB, otherwise periodical drift of zero point output may
occur due to mutual interference by the vibration of each tuning fork in the sensor.
6. Vibration from outside
To prevent the PWB's (mounted sensor) from resonating with external vibration, please consider following these
guides for the design of your PWB.
(1) Take into consideration the location of other parts which may cause vibration.
(2) Do not allow the screws, which fix the circuit board to become loose.
✽ Do a vibration test and carefully check the condition of the sensor attached to the unit.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00 Aug. 2015
Gyro Sensors
7. Recommended Circuit
(1) EWTS8RD□□□/EWTS8RS□□□
IGN
Vcc
Reg.
3.3 V
C2
Gyro
Sensor
C1
CSB
MOSI
REG
C3
SCLK
BATT
12 V
MISO
GND
NC
C1 : Design chip capacitor with good high frequency characteristic about 0.1 μF near the terminals of the
sensor as possible in parallel as measure for EMS.
C2 : Since the sensor does not have a power supply back up, insert a backup capacitor as an instantaneous power failure.
C3 : Design chip capacitor 0.1 μF near the terminals of the sensor as possible.
✽ NC terminal of the sensor connects with nowhere on your PWB.
(2) EWTS8RN□□□/EWTS8RK□□□
IGN
Reg.
5V
BATT
12 V
Vcc
A/D
Vcc
REG
Gyro
Sensor
Res_1
C3
(5 V)
C2
C1
Res_2
Res_3
Vout Res_4
GND
VRef
C4
C1 : Design chip capacitor with good high frequency characteristic
sensor as possible in parallel as measure for EMS.
C2 : Since the sensor does not have a power supply back up, insert
power failure.
C3 : Design chip capacitor 0.1 μF near the terminals of the sensor as
C4 : Design chip capacitor 0.1 μF near the terminals of the sensor as
✽ NC terminal of the sensor connects with nowhere on your PWB.
NC
about 0.1 μF near the terminals of the
a backup capacitor as an instantaneous
possible.
possible.
(3) If the noise of the frequency near the integral multiple (especially odd times) of the vibrator drive frequency and
detuning frequency (drive frequency–sense frequency) are impressed to a power supply line, the low frequency
wave noise of the difference of the frequency of a power supply noise and the frequency of the integral multiple
of the vibrator drive frequency will be amplified and outputted ten times by signal processing of an gyro sensor.
Please avoid the connection which contains high frequency noises, such as LCD, in the same power supply.
Drive frequency : 42.8 kHz±1 kHz
Detuning frequency 300 Hz to 1500 Hz
(4) Since it may be influenced by the radiation noise from the line containing many high frequency noises, such as
a digital power supply and digital GND, please give me consideration of wiring.
8. Limited Warranty
(1) Customer acknowledges that the gyro Sensor (“Product”) delivered to Customer by Panasonic Corporation.
(“Panasonic”) is designed and manufactured by Panasonic, or its affiliates, only for the purpose of
incorporation into Customer’s car navigation system (hereinafter called “Purpose”). Accordingly, Customer
understands that Panasonic, or its affiliates, shall only guarantee the performance of the Product under the
Product Specification for information to the extent such Product is used by Customer for the Purpose defined
in this paragraph.
(2) Customer agrees that it shall, at its sole cost and responsibility, test and evaluate the performance of
Customer’s system which incorporates the Product (hereinafter called “System”).
(3) Customer acknowledges that some failure mode, such that Product does not comply with this Specification
in terms of Zero Point Output and/or Sensitivity or shows any unstable performance, should be observed
depending on the characteristics of the System, or the environment at which such System is installed.
Therefore, Customer shall design the System taking into account such influences.
(4) Customer agrees that Panasonic shall not be responsible for any loss or damage due to defective Product,
including, but not limited to, economic loss, bodily injury or property damage, as far as Customer utilizes the
Product for any purpose other than the Purpose defined in the above paragraph 8-1. Therefore, Customer
shall ensure the “fail-safe” design of the System, if it deems necessary, to mitigate any such loss or damage.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00 Aug. 2015
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