SCA3000-E02 - Murata Electronics North America

SCA3000-E02

VTI Technologies Oy 1/4

www.vti.fi Doc. Nr. 8256000B.0 Rev.B.0

INT

DE-

MUX

1:3

Low-pass

Filter

Low-pass

Filter

Low-pass

Filter

Decimation

Coordinate

Mapping

and

Calibration

Oscillator

clock

Motion

detector

Free fall

detector

Non-Volatile

Memor

Reference

i/f

Control

INT

SCL

SDA

Ring

Buffer

C/V

Analog

calibration

ADC

SCA3000-E02 3-AXIS ULTRA LOW POWER ACCELEROMETER WITH

DIGITAL I2C INTERFACE

Features

• 2.35 V – 3.6 V supply voltage,

1.7 V - 3.6 V digital I/O voltage

• ±3 g measurement range

• I

2C digital interface: V2.1 compliant, 10-bit

addressing, supports standard mode

• Selectable frequency response

• Ultra low current consumption

(2.5 V, 200 µA typ)

• 64 samples/axis buffer memory for output

acceleration data and advanced features

enable significant power and resource

savings at system level

• Interrupt signal triggered by motion and free

fall

• Size 7x7x1.8 mm

• Proven capacitive 3D-MEMS technology

• High shock durability

• RoHS compliant / lead free soldering

Applications

SCA3000-E02 is targeted to battery operated

wrist and hand-held devices. Typical

applications are but not limited

• Motion activated functions in mobile

terminals and antitheft systems

• Gaming input devices

• Inclination sensing in digital inclinometers

• Tilt compensation in electronic compass

• Hard disk protection

• Pedometers and activity monitors

Figure 1 SCA3000-E02 Block Diagram

Data Sheet

SCA3000-E02

VTI Technologies Oy 2/4

www.vti.fi Doc. Nr. 8256000B.0 Rev.B.0

Performance Characteristics 1)

Typical supply range

2.35 – 2.7 V

Extended supply

range 2.7 – 3.6 V

Parameter

Condition

Min Typ 2) Max Min Typ 2) Max

Units

Analog and digital Vdd 2.35 2.5 2.7 - 3.3 - V

Digital I/O Vdd Vdd ≥ Digital I/O Vdd 1.7 1.8 / 2.5 2.7 - 3.3 - V

Operating temperature ** -40 - 85 -40 - 85 °C

Current consumption * Reset 3) - <7 12 - <9 - µA

Active - 200 240 - 250 - µA

Motion Detection

mode

- 170 210 - 210 - µA

Acceleration range * 4) Nominal -3 - 3 - ± 3 - g

Offset calibration error * Z-axis +1g position -40 - 40 - ± 100 - mg

Offset temperature error ** 5) -40 ... +85 °C -3 ±0.8 3 - ±0.8 - mg/°C

Sensitivity * 6) - 1000 - 1000 - Count/g

Sensitivity calibration error * -1.5 - +1.5 - ± 1 - %

Sensitivity temperature error

** 7)

-40 ... +85 °C - ±0.01 - ±0.01 - %/°C

Non-Linearity ** 8) -3 ±1 3 - 1 - % FS

Cross-Axis sensitivity ** 9) - 3 - - 3 - %

Bandwidth ** 10) Measurement mode 32 40 48 - 40 - Hz

Narrow band

measurement mode

9 11 13 - 11 - Hz

Noise ** 11) Measurement mode - 9 18 - 9 - mg RMS

Narrow band

measurement mode

- 5 10 - 5 - mg RMS

Output data rate ** Measurement mode 100 125 150 - 130 - Hz

Narrow band

measurement mode

50 63 75 - 63 -

Turn on time ** 12) Measurement mode - 30 70 - 30 - ms

Narrow band

measurement mode

- 200 400 - 200 -

I2C clock rate ** - - 100 - - 100 kHz

* 100% tested in production

** Qualified during product validation

1) The product is factory calibrated at 2.5 V in room temperature.

2) Typical values are not guaranteed.

3) Includes the current through the internal 400 kΩ pull-up resistor connected to digital I/O Vdd.

4) Range defined as g

2≤++ . The measuring range is tested on sensing element level. FS = 3g.

5) Offset temperature error = {Count(0g)-Offset} / Sensitivity [ g ]. Sensitivity = Calibrated sensitivity.

Offset= Calibrated offset.

6) Sensitivity = {Count(+1g) - Count(-1g)}/2 [Count/g].

7) Sensitivity temperature error = {[Count(+1g)-Count(-1g)]/2 - Sensitivity} / Sensitivity x 100% [%].

Sensitivity = Calibrated sensitivity.

8) From straight line through sensitivity calibration (+1g, -1g) points.

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. The angular alignment error

between X, Y and Z axis is included into the cross axis sensitivity.

10) Frequency responses according to Figure 3 and Figure 4.

11) Average noise/axis over the measurement bandwidth defined as )

(

n++ , where nx, ny and nz are

the measured signal's standard deviation due to noise in x, y and z directions.

12) Settling error less than 1% of FS.

SCA3000-E02

VTI Technologies Oy 3/4

www.vti.fi Doc. Nr. 8256000B.0 Rev.B.0

Figure 2 Sensing directions and package dimensions in mm with ±50 µm tolerance.

Figure 3 Frequency response of SCA3000-E02 in Figure 4 Frequency response of SCA3000-E02 in

measurement mode bypass measurement mode

SCA3000-E02

VTI Technologies Oy 4/4

www.vti.fi Doc. Nr. 8256000B.0 Rev.B.0

Figure 5 Application schematic

Pin # Name Function

1 NC Not connected

2 XRESET External reset, active low

3 INT Interrupt output

4 CLK Digital ground

5 DVSS Digital ground

6 DVDD Digital supply

7 DVIO Digital I/O supply

8 CSB Not connected

9 NC Not connected

10 NC Not connected

11 SCK_SCL I2C clock (SCL)

12 MISO_SDA I2C data (SDA)

13 MOSI Not connected

14 AVDD Analog supply

15 AVSS Analog ground

16 AVSS Analog ground

17 ATSTIO Not connected

18 NC Not connected

Table 1 Pin descriptions

Document Change Control

Rev. Date Change Description

A 21-Apr-06 1st official release

A.01 13-Jun-06 Dimensions updated

A.02 31-Oct-07 Figure 2 updated

B 28-Aug-08 Performance characteristics updated