Rev. 26 Aug 2004

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

Vout(@Vx) x

5.00

V

Vx

1-

SCA620 Series

FEATURES

• 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

• Re-flow solderable, process compatible

• Single +5 V supply; ratiometric voltage output in the

range 4.75 … 5.25 V

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

Accelerometer

ELECTRICAL CHARACTERISTICS

Parameter

Condition

Min.

Typ.

Max.

Units

Supply voltage Vdd

4.75

5.25

V

Current consumption

Vdd = 5 V; No load

2.0

4.0

mA

Operating temperature

- 40 +

125

°C

Resistive output load

Vout to Vdd or Vss

20

kOhm

Capacitive load

Vout to Vdd or Vss

20

nF

DC...80 kHz

0.25

mg

PERFORMANCE CHARACTERISTICS

Parameter

Condition/

Comment

SCA620-

CF8H1A

Units

Nominal

g

Horizontal

Mounting position

Vdd/2

V

Sensitivity

@ room temperature

V/g

-40...125 °C

mg

-25...85 °C

0.3

mg/°C

Sensitivity error

-40...125 °C

%

-25...85 °C

%

Over measuring range

mg

5%

Frequency response

50

Hz

Vdd = 4.75...5.25 V

2

%

VDD = 5.00 V, UNLESS OTHERWISE SPECIFIED

Note 1

The noise density of CF8H1A is 20 µg/ Hz.

Note 2

The measuring range is limited by sensitivity, offset and supply voltage rails of the device.

Note 3

Measuring direction perpendicular to the mounting plane.

Note 4

Vertical versions in +1 g position pins down, horizontal versions leg row 1-4 pointing downwards.

Note 5a

Sensitivity specified as [Vout (+1 g) - Vout(-1g)] / 2 [V/g] .

Note 6

Zero point error specified as (Vout (+0 g) - Vdd/2) / Vsens [g] (room temp. error included);

Vsens = Nominal sensitivity.

Note 7

Typical tolerance, not 100 % tested.

Note 8

Sensitivity error specified as {{[Vout (+1 g) -Vout (-1 g)] / 2} -Vsens} / Vsens x 100 % [%] (room

temp. error included); Vsens = Nominal sensitivity.

Note 9

Relative to straight line between

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.

Note 11

The output has true DC (0 Hz) response.

Note 12

Supply voltage noise also couples to the output, due to the ratiometric (output proportional

to supply voltage) nature of the accelerometer.

The ratiometric error is specified as: