SCA620 Series
Accelerometer
FEATURES
BENEFITS
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Available ranges 1.7 g and 12 g
8-pin plastic surface mount DIP package mountable
with pick and place machines
Enhanced failure detection
Digitally activated electrostatic self test
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
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Exceptional reliability, unprecedented accuracy and
excellent stability over temperature and time
Outstanding overload and shock durability
No additional components required
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APPLICATIONS
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Acceleration measurement
Inclination measurement
Motion measurement
Vibration measurement
For customised product please contact
VTI Technologies
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Lead-free reflow solderable lead-free component
ELECTRICAL CHARACTERISTICS
Parameter
Condition
Min.
Typ.
Max.
Units
Supply voltage Vdd
Current consumption
Operating temperature
Resistive output load
Capacitive load
4.75
5.25
4.0
V
mA
Vdd = 5 V; No load
2.0
- 40 +
20
125
°C
Vout to Vdd or Vss
Vout to Vdd or Vss
DC...4 kHz
kOhm
nF
20
5
Output noise (1
mVrms
PERFORMANCE CHARACTERISTICS
Condition/
Comment
SCA620-
CF8H1A
SCA620-
CHCV1A
Parameter
Units
Measuring range (2
Measuring direction (3
Zero point (nom.) (4
Sensitivity
Nominal
g
1.7
Horizontal
Vdd/2
1.2 (5
125
12
Vertical
Mounting position
@ room temperature
-40...125 °C
Vdd/2
V
V/g
mg
%
0.15
Zero point error (6
700
4 (8
4
Sensitivity error
-40...125 °C
Sensitivity error (7
Typical non-linearity (7
Cross-axis sensitivity (10
Frequency response
Ratiometric error (12
-25...85 °C
%
3 (8
40 (9
3
Over measuring range
mg
%
300
4
4
400 150
2
-3 dB point (11
Hz
%
50 30
2
Vdd = 4.75...5.25 V
VDD = 5.00 V, UNLESS OTHERWISE SPECIFIED
Note 1
The noise density of CF8H1A is 20 µg/ Hz.
Note 9
Relative to straight line between 1 g.
Note 2
Note 3
Note 4
Note 5a
Note 6
The measuring range is limited by sensitivity, offset and supply voltage rails of the device.
Measuring direction perpendicular to the mounting plane.
Vertical versions in +1 g position pins down, horizontal versions leg row 1-4 pointing downwards.
Sensitivity specified as [Vout (+1 g) - Vout(-1g)] / 2 [V/g] .
Zero point error specified as (Vout (+0 g) - Vdd/2) / Vsens [g] (room temp. error included);
Vsens = Nominal sensitivity.
Note 10
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.
Note 11
Note 12
Note 7
Note 8
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.
5.00V
Vx
Vout(@5V)
Vout(@Vx) x
The ratiometric error is specified as:
RE = 100% x 1-
Rev. 2 / 2 Nov 2006
VTI Technologies reserves the right to modify this specification without prior to notice.