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SCA100T Datasheet Preview

SCA100T Datasheet

Inclinometer

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SCA100T pdf
SCA100T Series
Inclinometer
FEATURES
• 2-axis inclination measurement (X and Y)
• Available ranges ±0.5 g (±30 °), ±1.0 g (±90 °)
• Over damped frequency response by Sensing Element
(-3 dB @ 8...28 Hz)
• 0.003 ° resolution (10 Hz BW, analog output)
• Advanced internal and external connection failure detection
• Digitally activated electrostatic sensing element self test
• Continuous memory parity check
• Single +5 V supply; ratiometric voltage output
• Serial Peripheral Interface (SPI) compatible
• Internal temperature sensor, accessible via SPI
• Lead-free reflow solderable lead-free component
BENEFITS
• Excellent reliability and stability over time
and temperature
• Instrumentation grade performance
• High resolution and low noise
• Wide temperature range
• Outstanding overload and shock durability
APPLICATIONS
• 2-axis platform levelling
• Inclination based position measurement
• Tilt measurement with cross-axis compensation
• 360 ° vertical orientation measurement
ELECTRICAL CHARACTERISTICS
Parameter
Supply voltage Vdd (1
Current consumption
Analogue output load
Condition
Vdd = 5 V; No load
Vout to Vdd or Vss
Min
4.75
10
Typ.
5.0
4
Digital output load
SPI clock frequency
AD conversion time
Data transfer time
@ 500 kHz clock
@500 kHz clock
150
38
Max
5.25
5
20
1
500
PERFORMANCE CHARACTERISTICS
Parameter
Condition
SCA100T-D01
(±30 °)
Measuring range (2
Nominal
±30
±0.5
Measuring direction (3
Mounting plane horizontal
Dual axis inclination
Mounting plane vertical
Orthogonal rotation
Zero point (4
Mounting position
Vdd/2
Sensitivity
@ room temperature
4(5a
Offset calibration accuracy (6a, 13
@ room temperature
±2
Offset temperature dependency (6b, 13
0...70 °
±5
-25…85 °C
±10
-40…125 °C
±15
Sensitivity calibration accuracy (7a, 13
@ room temperature
±0.5
Sensitivity temperature error (7b, 13
-40…85 °C
-1...1
85…125 °C
-2.5...1
Typical non-linearity (8
Over measuring range
±2
Cross-axis sensitivity (11
@ room temperature
4
Frequency response –3 dB (LP) (9
@ room temperature
8…28
Ratiometric error (10
Vdd = 4.75...5.25 V
±2
Output noise density (12
From DC...100 Hz
15
Digital output resolution
FS
11
Long term stability (14
@ steady temp
0.25
VDD = 5.00 V, APPLIES TO BOTH CHANNELS UNLESS OTHERWISE SPECIFIED
Units
V
mA
kOhm
nF
nF
kHz
µs
µs
SCA100T-D02
(±90 °)
±90
±1
Dual axis inclination
Orthogonal rotation
Vdd/2
2(5b
±4
±5
±10
±15
±0.5
-1...1
-2.5...1
±10
4
8…28
±2
15
11
T.B.D
Units
°
g
V
V/g
mg
mg
mg
mg
%
%
%
mg
%
Hz
%
µg/ Hz
Bits
mg
Note 1
Note 2
Note 3
Note 4
Note 5a
Note 5b
Note 6a
Note 6b
Note 7a
Note 7b
For maximum accuracy the supply voltage should be 5 ±0.05 V. 100 nF supply filtering capacitor
is recommended.
The measuring range is limited by sensitivity, offset and supply voltage rails of the device.
Measuring directions in parallel to mounting plane, arrows showing positive acceleration direction
Offset specified as Voffset = Vout(0 g) [ V ]. See note 12.
Sensitivity specified as Vsens = {Vout(+0.5 g) - Vout(-0.5 g)}/1 [ V/g ]. See note 12.
Sensitivity specified as Vsens = {Vout(+1 g) - Vout(-1 g)}/2 [V/g ]. See note 12.
Offset calibration error specified as Offset_Calib_error = {Vout(0 g) – Vdd/2} / Vsens [ g ].
Offset temperature error specified as Offset Error @ temp. = {Vout @ temp. – Vout @ room temp.}
/ Vsens [ g ].
Sensitivity calibration error specified as Sensitivity_calibr_error = { Vsens - Vsens_nom} /
Vsens_nom x 100 % [%] Vsens_nom = nominal sensitivity.
Sensitivity temperature error specified as Sensitivity error @ temp = { [Vsens @ temp –Vsens
@ room temp] / Vsens @ room temp x 100 % [% ].
Note 8
Note 9
From straight line through sensitivity calibration point.
The output has true DC (0 Hz) response.
Note 10 The ratiometric error is specified as:
Note 11
Note 12
Note 13
Note 14
The cross-axis sensitivity determines how much inclination / acceleration, perpendicular to
the measuring axis, couples to the output. The total crossaxis sensitivity is the geometric
sum of the sensitivities of the two axis which are perpendicular to the measuring axis.
In addition, supply voltage noise couples to the output due to the ratiometric nature of the
accelerometer.
Factory calibration value.
Power continuously connected.
Rev. 2 / 15 Sept 2005
VTI Technologies reserves the right to modify this specification without prior to notice.
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VTI technologies
VTI technologies

SCA100T Datasheet Preview

SCA100T Datasheet

Inclinometer

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SCA100T pdf
MEASURING DIRECTIONS
SCA100T Series
ABSOLUTE MAXIMUM RATINGS
Parameter
Value
Acceleration (powered or non-powered)
Supply voltage
Voltage at input/output pins
Temperature range
20 000
-0.3 V to +5.5 V
-0.3 V to (Vdd+0.3 V)
-55…125
Unit
g
V
V
°C
ELECTRICAL CONNECTION
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
Pin Name
SCK
Ext_C_1
MISO
MOSI
Out_2
GND
CSB
Ext_C_2
ST_2
ST_1 / Test_in
Out_1
VDD
I/O
Input
Input
Output
Input
Output
Power
Input
Input
Input
Input
Output
Power
Connection
Serial clock
X axis external capacitor input (Ch 1)
Master in slave out; data output
Master out slave in; data input
Y axis Output (Ch 2)
round (GND)
Chip select (active low)
Y axis external capacitor input (Ch 2)
Self test input for Y axis (Ch 2)
Self test input for X axis (Ch 1 )
X axis output (Ch 1)
Positive supply voltage (VDD)
If the SPI interface is not used SCK (pin1), MISO (pin3), MOSI (pin4) and CSB (pin7)
must be left floating.
Self test can be activated applying logic “1” (positive supply voltage level)
to ST pin (pin 9 and 10). If ST feature is not used pins 9 and 10 must be left
floating or connected to GND.
RECOMMENDED CIRCUIT
DIMENSIONS
The part weights under 1.2 g. The size is appr. (w x h x l) 9 x 5 x 16 mm. Pin pitch is standard 100 mils.
PCB PAD LAYOUTS
Acceleration in the direction of the arrow will
increase the output voltage.
VTI Technologies Oy
Myllynkivenkuja 6
P.O. Box 27
FI-01621 Vantaa
Finland
Tel. +358 9 879 181
Fax +358 9 879 18791
sales@vti.fi
VTI Technologies Oy
Frankfurt Branch
Rennbahnstr. 72-74
D-60528 Frankfurt am Main
Germany
Tel. +49 69 6786 880
Fax +49 69 6786 8829
sales.de@vti.fi
VTI Technologies, Inc.
One Park Lane Blvd.
Suite 804 - East Tower
Dearborn, MI 48126
USA
Tel. +1 313 425 0850
Fax +1 313 425 0860
sales@vtitechnologies.com
Free Datasheet http://www.datasheet4u.com/


Part Number SCA100T
Description Inclinometer
Maker VTI technologies
Total Page 2 Pages
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