SCA1020 VTI [VTI technologies], SCA1020 Datasheet

SCA1020

Manufacturer Part Number

SCA1020

Description

Accelerometer

Manufacturer

VTI [VTI technologies]

Datasheet

1.SCA1020.pdf (3 pages)

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Rev. 18 Jan 2005

Note 1

Note 2

Note 3

Note 4

Note 5

Note 6

Note 7

Note 8

ELECTRICAL CHARACTERISTICS

Parameter

Supply voltage Vdd

Current consumption

Analog resistive output load

Analog capacitive output load

Digital output load

SPI clock frequency

AD conversion time

Data transfer time

PERFORMANCE CHARACTERISTICS

Parameter

Measuring range

Measuring direction relative to

mounting plane

Zero point

Sensitivity

Zero point error over temperature

Sensitivity error over temperature

Typical non-linearity

Cross-axis sensitivity

Frequency response –3dB

Ratiometric error

Output noise density

Digital output resolution

VDD = 5.00V, UNLESS OTHERWISE SPECIFIED

(3,12

(4,12

100 nF supply by-pass capacitor is needed.

Measuring directions in parallel to mounting plane, arrows showing positive acceleration

direction.

Zero point speciﬁ ed as Voffset = Vout(0 g) [ V ]. See note 12.

Sensitivity speciﬁ ed as Vsens = {Vout(+1 g) - Vout(-1 g)}/2 [ V/g ]. See note 12.

Zero point error speciﬁ ed as Zero point error = {Vout(0 g) – Vdd/2} / Vsens [ g ] VSens =

Nominal sensitivity Vdd/2 = Nominal offset.

Sensitivity error speciﬁ ed as Sensitivity error = { [Vout(+1 g)-Vout(-1 g)] / 2 - Vsens_nom} /

Vsens_nom x 100 % [% ] Vsens_nom = nominal sensitivity See note 12.

From straight line through +1 g and -1 g points.

The output has true DC (0 Hz) response.

(12

(10

(11

Condition

Vdd = 5 V; No load

Vout to Vdd or Vss

@ 500 kHz

@500 kHz clock

VTI Technologies reserves the right to modify this speciﬁ cation without prior to notice.

Condition

Nominal

See note 12.

Mounting position

@ room temperature

-25…85 °C typical

-40…125 °C

-25…85 °C typical

-40…125 °C

Over measuring range

@ room temperature

@ -40…125 °C

Vdd = 4.75...5.25 V

From DC...100 Hz

Accelerometer

SCA1000 and SCA1020 Series

FEATURES

• 2-axis measurement: SCA1000 for X - Y measurement and

• Available range ±1.7 g

• Interchangeable with SCA610/SCA620 (see interchangeability

• Over damped sensing element to control frequency response

• SMD DIL-12 lead-free component

• Compatible with lead-free reﬂ ow soldering process

• Advanced internal and external connection failure detection

• Digitally activated electrostatic self-test

• Continuous memory parity check

• Single +5 V supply; two ratiometric analog voltage outputs

• Serial Peripheral Interface (SPI) compatible digital output (11 bits)

• Internal temperature sensor, accessible via SPI

Min

4.75

SCA1000-D01 SCA1020-D02

SCA1020 for Z - Y measurement

drawing below)

“Y” =parallel

“X”= parellel

50±30 Hz

±1.7

Vdd/2

±100

±70

±20

±3

±4

3.5

1.2

Typ.

150

5.0

“Z”= perpendicular

“Y”= parallel

50±30 Hz

±1.7

Vdd/2

Max

±100

±20

±70

±3

±4

3.5

5.25

500

1.2

Note 9

Note 10

Note 11

Note 12

The ratiometric error is speciﬁ ed as:

The cross-axis sensitivity determines how much 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. The angular

alignment error between channels 1 and 2 is included into the cross axis error.

Typical ﬁ gure. In addition, supply voltage noise couples to the output due to the

ratiometric nature of the accelerometer.

Measuring directions.

Units

kOhm

kHz

µs

µg/ Hz

Bits

V/g

For customized product, please contact VTI Technologies

BENEFITS

• Excellent reliability and stability over time and

• High resolution and low noise

• Wide operating temperature range

• Outstanding overload and shock durability

APPLICATIONS

• 2-axis acceleration measurements

• 2-axis platform leveling

• Inclination based position measurement

• 360 ° vertical orientation measurement

temperature

RE =

100%

Vout(@Vx) x

Vout(@

Preliminary

5.00

Related parts for SCA1020

SCA1020 Summary of contents

Page 1

... VTI Technologies reserves the right to modify this speciﬁ cation without prior to notice. SCA1000 and SCA1020 Series FEATURES • 2-axis measurement: SCA1000 for measurement and SCA1020 for measurement • Available range ±1.7 g • Interchangeable with SCA610/SCA620 (see interchangeability drawing below) • ...

Page 2

... The size of the part is approximately ( mm. Pin pitch is standard 100 mils. SENSING DIRECTION Acceleration in the direction of the arrow will increase the output voltage. SCA1000 and SCA1020 Series SCA1020 ( Conﬁ guration Position Position Position Position ...

Page 3

... Tel. +358 9 879 181 Tel. +49 69 6786 880 Fax +358 9 879 18791 Fax +49 69 6786 8829 sales@vti.ﬁ sales.de@vti.ﬁ SCA1000 and SCA1020 Series RECOMMENDED CIRCUIT VTI Technologies, Inc. One Park Lane Blvd. Suite 804 - East Tower Dearborn, MI 48126 USA Tel ...

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