One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
ADXL50–SPECIFICATIONS
Parameter
SENSOR INPUT
Measurement Range
Nonlinearity
Alignment Error
1
Transverse Sensitivity
2
SENSITIVITY
Initial Sensitivity at V
PR
Temperature Drift
3
ZERO
g
BIAS LEVEL
Initial Offset
vs. Temperature
3
vs. Supply
NOISE PERFORMANCE
Voltage Noise Density
Noise in 100 Hz Bandwidth
Noise in 10 Hz Bandwidth
FREQUENCY RESPONSE
3 dB Bandwidth
4
3 dB Bandwidth
4
Sensor Resonant Frequency
SELF TEST INPUT
Output Change at V
PR5
Logic “1” Voltage
Logic “0” Voltage
Input Resistance
+3.4 V REFERENCE
Output Voltage
Output Temperature Drift
3
Power Supply Rejection
Output Current
PREAMPLIFIER OUTPUT
Voltage Swing
Current Output
Capacitive Load Drive
BUFFER AMPLIFIER
Input Offset Voltage
6
Input Bias Current
Open-Loop Gain
Unity Gain Bandwidth
Output Voltage Swing
Capacitive Load Drive
Power Supply Rejection
POWER SUPPLY
Operating Voltage Range
Quiescent Supply Current
TEMPERATURE RANGE
Operating Range J
Specified Performance A
Automotive Grade*
NOTES
1
2
(T
A
= T
MIN
to T
MAX
, T
A
= +25 C for J Grade Only, V
S
= +5 V, @ Acceleration = 0
g,
unless otherwise noted)
Min
–50
0.2
±
1
±
2
16.1
19.0
0.75/1.0
1.80
±
15/35
10
6.6
66
20
800
1300
10
24
–1.00
–1.15
0.8
21.9
ADXL50J/A
Typ
Max
+50
Units
g
% of FS
Degrees
%
mV/g
% of Reading
V
mV
mV/V
mg/√Hz
mg rms
mg rms
Hz
kHz
kHz
V
V
V
kΩ
V
mV
mV/V
µA
V
µA
pF
mV
nA
dB
kHz
V
pF
mV/V
V
mA
°C
°C
°C
Conditions
Guaranteed Full Scale
Best Fit Straight Line, 50
g
FS
+25°C
at V
PR
1.55/1.60
V
S
= 4.75 V to 5.25 V
at V
PR
BW = 10 Hz to 1 kHz
2.05/2.00
32
12
C1 = 0.022
µF
(See Figure 22)
C1 = 0.0068
µF
ST Pin from Logic “0” to “1”
–0.85
2.0
To Common
3.350
DC, V
S
= +4.75 V to +5.25 V
Sourcing
50
3.400
±
10
1
3.450
10
500
0.25
30
V
S
– 1.4
80
100
±
10
5
80
200
0.25
1000
1
4.75
10
0
–40
–40
±
25
20
Source or Sink
Delta from Nominal 1.800 V
DC
I
OUT
=
±
100
µA
DC, V
S
= +4.75 V to +5.25 V
V
S
– 0.25
10
5.25
13
+70
+85
+125
Alignment error is specified as the angle between the true and indicated axis of sensitivity, (see Figure 2).
Transverse 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 V
PR
output. This is the algebraic sum of the alignment and the inherent sensor sensitivity errors, (see Figure 2).
3
Specification refers to the maximum change in parameter from its initial at +25°C to its worst case value at T
MIN
to T
MAX
.
4
Frequency 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.
5
Applying logic high to the self-test input has the effect of applying an acceleration of –52.6
g
to the ADXL50.
6
Input 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.
–2–
REV. B
ADXL50
ABSOLUTE MAXIMUM RATINGS*
Package Characteristics
Acceleration (Any Axis, Unpowered for 0.5 ms) . . . . . . 2000 g
Acceleration (Any Axis, Powered for 0.5 ms) . . . . . . . . . . 500 g
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