SCA610 Series
Accelerometer/Inclinometer
FEATURES
• Available ranges ±0.5 g (±30 º), ±1 g (±90 º), ±1.5 g, ±1.7 g,
±3.0 g
• 8-pin plastic surface mount DIP package mountable with pick
and place machines
• Enhanced failure detection
• Digitally activated electrostatic self test (not for inclinometers)
• Calibration memory parity check
• Continuous connection failure detection
• Bi-directional acceleration measurement
• Controlled frequency response in the sensing element
• Single +5 V supply; ratiometric voltage output in the range
4.75 … 5.25 V
• Lead-free reflow solderable lead-free component
BENEFITS
• Exceptional reliability, unprecedented accuracy
and excellent stability over temperature and time
• Outstanding overload and shock durability
• No additional components required
APPLICATIONS
• Acceleration measurement
• Inclination measurement
• Motion measurement
• Vibration measurement
For customised product please contact
VTI Technologies
ELECTRICAL CHARACTERISTICS
Parameter
Condition
Supply voltage Vdd
Current consumption
Typ.
Max.
4.75
Vdd = 5 V; No load
Operating temperature
Resistive output load
Min.
2.0
- 40
Vout to Vdd or Vss
Units
5.25
V
4.0
mA
+ 125
20
°C
kOhm
Capacitive load
Vout to Vdd or Vss
20
nF
Output noise (1
DC...4 kHz
5
mVrms
SCA610C21H1A
SCA610C23H1A
SCA610C28H1A
SCA610C13H1A
SCA610CC5H1A
±1.5
Horizontal
±1.7
Horizontal
±1 .5
Horizontal
±3
Horizontal
PERFORMANCE CHARACTERISTICS
Parameter
Condition/
Comment
Measuring range (2
Nominal
Mounting plane (3
Measuring Direction
SCA610- SCA610CAHH1G (13 CA1H1G (13
±0.5 (±30 º)
±1 (±90 º)
Horizontal
Horizontal
±1
Horizontal
Units
g
Zero point (nom.) (4
Mounting position
Vdd/2
Vdd/2
Vdd/2
Vdd/2
Vdd/2
Vdd/2
Vdd/2
V
Sensitivity
@ room temperature
4 (5b
2 (5a
2 (5a
1.333 (5a
1.2 (5a
1.33 (5a
0.75 (5a
V/g
±50
±4 (8b
±2.5 (8b
±10 (9b, c
±50
±4 (8a
±2.5 (8a
±10(9a, c
±125
±5 (8a
±3 (8a
±20(9a
±125
±5 (8a
±3 (8a
±20 (9a
±125
±5 (8a
±3 (8a
±20(9a
±125
±5 (8a
±3 (8a
±20(9a
±195
±5 (8a
±3 (8a
±60(9a
mg
Zero Point error (6
-40..125 °C
Sensitivity error
-40..125 °C
Sensitivity error (7
-25...85 °C
Typical non-linearity (7
Over measuring range
Cross-axis sensitivity (10
Frequency response
-3dB point (11
Ratiometric error (12
Vdd = 4.75...5.25 V
%
%
mg
5
5
4
4
4
4
4
%
18±10
18±10
50±30
50±30
50±30
400±150
115±55
Hz
2
2
2
2
2
2
2
%
VDD = 5.00 V, UNLESS OTHERWISE SPECIFIED
Note 1
Note 2
Note 3
Note 4
Note 5a
Note 5b
Note 6
Note 7
Note 8a
Note 8b
Note 9a
The noise density of CAHH1G and CA1H1G is 30 µg/ Hz, the noise density of C23H1A and C28H1A
is 20 µg/ Hz.
The measuring range is limited by sensitivity, offset and supply voltage rails of the device.
Measuring direction parallel to the mounting plane.
Vertical versions in +1 g position, i.e. arrow up: horizontal versions pins down (+0 g)
Sensitivity specified as [Vout (+1 g) - Vout(-1 g)] / 2 [V/g] .
Sensitivity specified as [Vout (+0.5 g) - Vout(-0.5 g)][V/g] .
Zero point error specified as (Vout (+0 g) - Vdd/2) / Vsens [g] (room temp. error included);
Vsens = Nominal sensitivity.
Typical tolerance, not 100 % tested.
Sensitivity error specified as {{[Vout (+1 g) -Vout (-1 g)] / 2} -Vsens} / Vsens x 100 % [%] (room
temp. error included); Vsens = Nominal sensitivity.
Sensitivity error specified as {{[Vout (+0.5 g) -Vout (-0.5 g)] / 2} -Vsens} / Vsens x 100 % [%]
(room temp. error included); Vsens = Nominal sensitivity.
Relative to straight line between ±1 g.
Rev. 3 /30 Dec 2005
VTI Technologies reserves the right to modify this specification without prior to notice.
Note 9b
Note 9c
Note 10
Note 11
Note 12
Note 13
Relative to straight line between ±0.5 g.
In inclinometer applications a correction based on the angular error resulting from cross-axis
sensitivity around the inclination angle reduces non-linearity.
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.
The output has true DC (0 Hz) response.
Supply voltage noise also couples to the output, due to the ratiometric (output proportional
to supply voltage) nature of the accelerometer.
Self test not recommended.
The ratiometric error is specified as:
RE = 100% x 1-
Vout(@Vx) x 5.00V
Vx
Vout(@5V)
SCA610 Series
ABSOLUTE MAXIMUM RATINGS
Parameter
Value
Acceleration (powered or non-powered)
20000
Units
g
Supply voltage
-0.3 to +7.0
V
Voltage at input / output pins
-0.3 to Vdd + 0.3
V
Temperature range
-55 to +125
ºC
ELECTRICAL CONNECTION
Pin#
Pin Name Connection
1
Open or capacitively connected to GND for EMC*)
2
Open or capacitively connected to GND for EMC*)
3
4
RECOMMENDED CIRCUIT
Open or capacitively connected to GND for EMC*)
GND
Negative supply voltage (VSS)
6
ST
Self-test control
7
VOUT
Sensor analog output
8
VDD
Positive supply voltage (VDD)
5
Open or capacitively connected to GND for EMC*)
*) recommended capacity min. 20 pF – Effectiveness should be tested and if necessary adapted in
the respective connection.
DIMENSIONS
PCB PAD LAYOUTS
The accelerometer weighs under 1 g.
The size of the part is approximately (w x h x l) 9 x 5 x 11 mm. Pin pitch is standard 100 mils.
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
[email protected]