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PDF SCA103T Data sheet ( Hoja de datos )
| Número de pieza | SCA103T | |
| Descripción | Inclinometer | |
| Fabricantes | VTI technologies | |
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SCA103T Series
Inclinometer
Preliminary
FEATURES
• High sensitivity by differential analog output or digital
output via SPI. Single ended signal available by using a
differential amplifier or digitally using internal 11 bit digital
output and external micro controller.
• Available ranges ±15°,±30°
• Over damped frequency response (-3dB @ 8...28 Hz)
• Integrated temperature sensor, accessible via SPI
• Digitally activated electrostatic sensing element self test
• Continuous memory parity check
• Advanced internal and external connection failure detection
• Single +5V supply; ratiometric analog voltage outputs
• Serial Peripheral Interface (SPI) compatible digital output
• DIL-12 plastic SMD package, lead-free reflow solderable
BENEFITS
• High immunity to external interference and noise
supply voltage.
• Improved temperature dependency and long term
stability
• Excellent reliability and stability over time and
temperature
• Instrumentation grade performance
• High resolution and low noise
• Wide operating temperature range
• Outstanding overload and shock durability
APPLICATIONS
• Single axis inclination instruments
• Inclination based position measurement
ELECTRICAL CHARACTERISTICS
Electrical characteristics Condition
Min Typ Max Units
Supply voltage Vdd (1
Current consumption
Analog resistive output load
Analog capacitive output load
Digital output load
SPI clock frequency
AD conversion time
Data transfer time
4.75 5.0 5.25
V
Vdd = 5 V; No load
4 5 mA
Vout to Vdd or Vss
10
kOhm
20 nF
@ 500kHz clock
1 nF
500 kHz
150 µs
@500 kHz clock
38 µs
PERFORMANCE CHARACTERISTICS
D/S
Performance
characteristics
D Measuring range (2
D Measuring direction (3
Condition
Nominal
Mounting plane horizontal
SCA103T-D04
±15
±0.26
Horizontal
SCA103T-D05
±30
±0.5
Horizontal
Units
°
g
S Zero point (4
D Sensitivity
S Offset calibration accuracy (6a, 13
D Offset temperature dependency (6b, 13
D
D
S Sensitivity calibration accuracy (7a, 13
Mounting position
@ room temperature
@ room temperature
0...70°C
-25…85°C
-40…125°C
@ room temperature
Vdd/2
280(15
16(5a
0.057
±1
< ± 0.11
< ±2
< ±0.14
< ±2.5
< ±0.29
< ±5
±0.5
Vdd/2
140(15
8(5b
0.11
±2
< ±0.11
< ±2
< ±0.14
< ±2.5
< ±0.29
< ±5
±0.5
V
mV/°
V/g
°
mg
°
mg
°
mg
°
mg
%
D Sensitivity temperature error (7b, 13
-40...85°C
-1…1 -1…1 %
D
D Typical non-linearity (8
S Cross-axis sensitivity (11
-40…125°C
Over measuring range
@ room temperature
-2.5…1
±T.B.D
±T.B.D
4
-2.5…1
±0.11
±2
4
%
°
mg
%
S Frequency response –3dB (LP) (9
@ room temperature
8…28 8…28 Hz
S Ratiometric error (10
Vdd = 4.75...5.25V
1 1%
D Output noise density (12
D Digital output resolution
D Long term stability (14
From DC...100Hz
Effective Differential
@ steady temp
0.0004
0.009
12
< 0.014
0.0004
0.017
12
< 0.014
°/√Hz
°/LSB
Bits
°
Parameters marked as D are measured in differential mode using external differential amplifier. The performance of selected amplifier may have an effect to some parameters.
Differential signal is determined as a Out_diff = Out_1 – Out_2 (pin 11 – pin 5).
VDD = 5.00 V, APPLIES TO BOTH CHANNELS UNLESS OTHERWISE SPECIFIED
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.
100nF supply filtering capacitor should be used.
The measuring range is limited by sensitivity, offset and supply voltage rails of the device.
Measuring direction parallel to mounting plane, arrow showing positive direction.
Offset specified as Voffset = Vout(0g) [ V ]. See note 12.
Sensitivity specified as Vsens = {Vout(+0.26g) - Vout(-0.26g)}/0.52 [ V/g ]. See note 12
Sensitivity specified as Vsens = {Vout(+0.5g) - Vout(-0.5g)}/1 [ V/g ]. See note 12
Offset calibration error specified as Offset_Calib_error = {Vout(0g) – Vdd/2} / Vsens [ g ].
Offset temperature error specified as Offset Error @ temp. = {Vout @ temp. – Vout @ room temp.}
/ Vsens [ g ]
Vsens = Nominal sensitivity. See note 12.
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% [ % ]. See note 12.
Note 8.
Note 9.
Note 10.
From straight line through sensitivity calibration points.
The output has true DC (0Hz) response.
The ratiometric error is specified as:
Note 11.
Note 12.
Note 13.
Note 14.
Note 15.
The cross-axis sensitivity determines how much inclination / acceleration, perpendicular
to the measuring axis, couples to the output. The total cross-axis sensitivity is the geo-
metric 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.
Is valid between angles 0° to 1°.
Rev. 6 Apr 2005
VTI Technologies reserves the right to modify this specification without prior to notice.
Free Datasheet http://www.datasheet4u.com/
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