SCA103T View Datasheet(PDF) - Murata Manufacturing
Part Name
Description
Manufacturer
SCA103T Datasheet PDF : 17 Pages
| |||
SCA103T Series
Angles close to 0° inclination can be estimated quite accurately with straight line conversion but for
best possible accuracy arcsine conversion is recommended to be used. Following table shows the
angle measurement error if straight line conversion is used.
Straight line conversion equation:
VDout Offset
Sensitivity
Where: Sensitivity = 280mV/° with SCA103T-D04 or Sensitivity= 140mV/° with SCA103T-D05
Tilt angle [°]
0
1
2
3
4
5
10
15
30
Straight line conversion error [°]
0
0.0027
0.0058
0.0094
0.0140
0.0198
0.0787
0.2185
1.668
2.3 Ratiometric Output
Ratiometric output means that the zero offset point and sensitivity of the sensor are proportional to
the supply voltage. If the SCA103T supply voltage is fluctuating, the SCA103T output will also vary.
When the same reference voltage for both the SCA103T sensor and the measuring part (A/D-
converter) is used, the error caused by reference voltage variation is automatically compensated.
2.4 SPI Serial Interface
A Serial Peripheral Interface (SPI) system consists of one master device and one or more slave
devices. The master is defined as a microcontroller providing the SPI clock and the slave as any
integrated circuit receiving the SPI clock from the master. The ASIC in Murata Electronics’ products
always operates as a slave device in master-slave operation mode.
The SPI has a 4-wire synchronous serial interface. Data communication is enabled with a low
active Slave Select or Chip Select wire (CSB). Data is transmitted by a 3-wire interface consisting
of wires for serial data input (MOSI), serial data output (MISO) and serial clock (SCK).
MASTER
MICROCONTROLLER
SLAVE
DATA OUT (MOSI)
SI
DATA IN (MISO)
SO
SERIAL CLOCK (SCK)
SCK
SS0
CS
SS1
SI
SS2
SO
SS3
SCK
CS
SI
SO
SCK
CS
SI
SO
SCK
CS
Figure 9.
Typical SPI connection
Murata Electronics Oy
www.muratamems.fi
Subject to changes
Doc.Nr. 8261700
10/17
Rev.A3
Share Link: 