ADXL202EB datasheet(2/2 Pages) AD

2 / 2 page

REV. 0

–2–

ADXL202EB

Table II. ADXL202EB Pinout Description

Pin Reference

Pinout

GROUND

SELF-TEST INPUT

X AXIS DUTY CYCLE OUT

Y AXIS DUTY CYCLE OUT

+V SUPPLY (3 V dc to

5.25 V dc)

Table III. DCM Period vs. RSET Value

T2 Period

RSET

1 ms

124 k

Ω

2 ms

248 k

Ω

5 ms

620 k

Ω

10 ms

1.24 M

Ω

Table IV. Typical XFILT and YFILT Values vs. Bandwidth and

Noise Performance

XFILT, YFILT

Bandwidth

RMS Noise

0.01

µF

500 Hz

12.7 mg

0.047

µF

100 Hz

7 mg

0.1

µF

50 Hz

4.2 mg

0.47

µF

10 Hz

2.3 mg

Table I. ADXL202EB Parts List

Reference

Value

Function

2200 pF/25 V

XFILT. Sets X axis analog bandwidth along with C2

Added by User

XFILT. Sets X axis analog bandwidth along with C1

Added by User

YFILT. Sets Y axis analog bandwidth along with C4

2200 pF/25 V

YFILT. Sets Y axis analog bandwidth along with C3

Connector

All power and signal connection through J1

Added by User

RSET. Sets the PWM period (T2)

ADXL202

Dual axis

±2g accelerometer

SETTING THE ADXL202’s BANDWIDTH

The ADXL202EB is supplied with the minimum specified XFILT

and YFILT values installed. Your application will likely require a

narrower bandwidth to improve noise performance. See Table

IV for some typical capacitor values.

RSET

Figure 2. ADXL202EB Part Layout (Top View)

SPECIAL NOTES ON HANDLING

Note that the ADXL202EB is not reverse polarity protected.

Reversing the +VSUPPLY and Ground pins will damage the

ADXL202.

Dropping the ADXL202EB on a hard surface may generate

several thousand g of acceleration. Enough to damage the accel-

erometer. Please refer to the ADXL202 data sheet for information

on shock survivability.

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