Rev. 26 Aug 2004 VTI Technologies reserves the right to modify this specification without prior to notice.
Vout(@Vx) x
R
E = 100% xVout(@5V)
5.00V
Vx
1-
SCA110 and SCA111 Series
Stand Alone Accelerometer
FEATURES
• Stand alone accelerometer in zinc housing
• Available ranges ±1.2g, ±2g
• Accurate over a wide temperature range -40°C ... +125°C
without any compensation
• Electrical connection through the moulded-in PUR cable
• Standard analogue output
• Acceleration in the direction of the arrow will increase the
output voltage
BENEFITS
• Long term stability
• Excellent overload durability
• Zinc hausing (IP66) with overload protection make
the accelerometer durable enough to stand a drop
from 2 meters onto a concrete floor
• Meet typical automotive EMC requirements
• Easy to use
APPLICATIONS
• Acceleration measurement
• Inclination measurement
• Vibration measurement
• Motion measurement
Note 1 SCA110 (5V) Accelerometers are ratiometric; Offset and Sensitivity are proportional to supply
voltage.
Note 2 Output swing 0.5 - 4.5 V with nominal supply voltage.
Note 3 Measuring direction is perpendicular to the mounting plane (see Note 10). Zero is defined with
no acceleration and the device mounted in the prescribed mounting plane (see Note 10 and
pictures page 2).
Note 4 Sensitivity specified as [Vout (+1g) - Vout(-1g)] / 2 [V/g].
Note 5 Zero point error specified as (Vout (+0g) - Vdd/2) / Vsens [g] (room temp. error included);
Vsens = Nominal sensitivity.
Note 6 Sensitivity error specified as { [Vout(+1g)-Vout(-1g)] / 2 - Vsens} / Vsens x 100% Vsens =
Nominal sensitivity.
Note 7 Relative to the straight line between ±1g.
Note 8 Output has true DC (0Hz) response.
Note 9 The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring
axis, couples to the output. The total cross-axis sensitivity is the geometric sum of the
sensitivities of the two axes, which are perpendicular to the measuring axis.
Note 10 Offset measuring direction in figures (see picture page 2)
Note 11 Supply voltage noise also couples to the output, due to the ratiometric (output proportional to
supply voltage) nature of the accelerometer.
ELECTRICAL CHARACTERISTICS
Parameter Comment SCA110-
C12H1W
SCA111-
C12H1W
SCA111-
CC4H1W Units
Sensitivity error (6 @ room temperature ±2 ±2 ±2 %
-20 . . . 85 °C ±3 ±3 ±3
-40 . . . 125 °C ±4 ±4 ±4
Typ. Non-linearity (7 Deviation from ±1g line ± 20 ±20 ±60 mg
Frequency response -3dB point (8 400 ± 150 400 ± 150 115 ± 55 Hz
Output load resistive (min.) 20 20 20 kΩ
capacitive (max.) 20 20 20 nF
Supply voltage effect Offset ±35 ±25 ±50 mg
Cross-axis sensitivity (9 ±4 ±4 ±4 %
Typ. Output noise V(AC)RMS (DC ... 4 kHz) 5 5 5 mV
Ratiometric error(11 Vdd=4.75...5.25V ±2 %
Supply voltage effect Offset ±25 ±50 mg
The ratiometric error is specified as:
PERFORMANCE CHARACTERISTICS
Parameter Comments SCA110-
C12H1W
SCA111-
C12H1W
SCA111-
CC4H1W Unit
Supply voltage Ratiometric (1 5 ± 0.25 7 – 27 7 – 27 V
Supply current Typical, without load 2 2 2 mA
Measuring range (2 ±1.2 ±1.2 ±2 g
Measuring direction (3 Horizontal Horizontal Horizontal
Zero point (9 Nominal value 0.5 * Vdd 2.5 2.5 V
Sensitivity (4 Nominal value 0.3 * Vdd 1,5 1 V/g
Offset error (5 @ room temperature ±50 ±50 ±75 mg
-20 . . . 85 °C ±80 ±80 ±130
-40 . . . 125 °C ±120 ±120 ±195
Preliminary
VTI Technologies Oy
Myllynkivenkuja 6
P.O. Box 27
FI-01621 Vantaa
Finland
Tel. +358 9 879181
Fax +358 9 87918791
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
DIMENSIONS
Horizontal Vertical
The accelerometer weighs approximately 60g
with a standard 30cm PUR cable (3 x 0.5 mm2),
excluding connector.
WIRING INFORMATION
Red = Supply voltage
White = Ground
Yellow = Output
Recommended mounting screw size: M4
DIRECTION
SCA110- and SCA111 Series
38.0
29.5
ø4.2
29.5
41.0
13.5
14.0
