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ADXL50–SPECIFICATIONS

ADXL50J/A

Parameter

Conditions

Min

Typ

Max

Units

SENSOR INPUT

Measurement Range

Guaranteed Full Scale

–50

+50

Nonlinearity

Best Fit Straight Line, 50 g FS

0.2

% of FS

Alignment Error

±1

Degrees

Transverse Sensitivity2

±2%

SENSITIVITY

Initial Sensitivity at VPR

+25

°C

16.1

19.0

21.9

mV/g

Temperature Drift

0.75/1.0

% of Reading

ZERO g BIAS LEVEL

at VPR

Initial Offset

1.55/1.60

1.80

2.05/2.00

vs. Temperature3

±15/35

vs. Supply

VS = 4.75 V to 5.25 V

mV/V

NOISE PERFORMANCE

at VPR

Voltage Noise Density

BW = 10 Hz to 1 kHz

6.6

mg/

√Hz

Noise in 100 Hz Bandwidth

mg rms

Noise in 10 Hz Bandwidth

mg rms

FREQUENCY RESPONSE

3 dB Bandwidth

C1 = 0.022

µF (See Figure 22)

800

1300

3 dB Bandwidth

C1 = 0.0068

µF

kHz

Sensor Resonant Frequency

kHz

SELF TEST INPUT

Output Change at VPR

ST Pin from Logic “0” to “1”

–0.85

–1.00

–1.15

Logic “1” Voltage

2.0

Logic “0” Voltage

0.8

Input Resistance

To Common

Ω

+3.4 V REFERENCE

Output Voltage

3.350

3.400

3.450

Output Temperature Drift

±10

Power Supply Rejection

DC, VS = +4.75 V to +5.25 V

mV/V

Output Current

Sourcing

500

µA

PREAMPLIFIER OUTPUT

Voltage Swing

0.25

VS – 1.4

Current Output

Source or Sink

µA

Capacitive Load Drive

100

BUFFER AMPLIFIER

Input Offset Voltage

Delta from Nominal 1.800 V

±10

±25

Input Bias Current

520

Open-Loop Gain

Unity Gain Bandwidth

200

kHz

Output Voltage Swing

IOUT = ± 100 µA

0.25

VS – 0.25

Capacitive Load Drive

1000

Power Supply Rejection

DC, VS = +4.75 V to +5.25 V

mV/V

POWER SUPPLY

Operating Voltage Range

4.75

5.25

Quiescent Supply Current

TEMPERATURE RANGE

Operating Range J

+70

°C

Specified Performance A

–40

+85

°C

Automotive Grade*

–40

+125

°C

NOTES

1Alignment error is specified as the angle between the true and indicated axis of sensitivity, (see Figure 2).

2Transverse sensitivity is measured with an applied acceleration that is 90

° from the indicated axis of sensitivity. Transverse sensitivity is specified as the percent of

transverse acceleration that appears at the VPR output. This is the algebraic sum of the alignment and the inherent sensor sensitivity errors, (see Figure 2).

3Specification refers to the maximum change in parameter from its initial at +25

°C to its worst case value at T

MIN to TMAX.

4Frequency at which response is 3 dB down from dc response assuming an exact C1 value is used. Maximum recommended BW is 10 kHz using a 0.007

µF capacitor, refer to

Figure 22.

5Applying logic high to the self-test input has the effect of applying an acceleration of –52.6 g to the ADXL50.

6Input offset voltage is defined as the output voltage differential from 1.800 V when the amplifier is connected as a follower (i.e., Pins 9 and 10 tied together). The voltage at

Pin 9 has a temperature drift proportional to that of the 3.4 V reference.

*Contact factory for availability of automotive grade devices.

All min and max specifications are guaranteed. Typical specifications are not tested or guaranteed.

Specifications subject to change without notice.

(TA = TMIN to TMAX, TA = +25 C for J Grade Only, VS = +5 V, @ Acceleration = 0 g,

unless otherwise noted)

REV. B

–2–

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