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ADXL50_15 Datasheet(Arkusz danych) 2 Page - Analog Devices

Numer części ADXL50_15
Szczegółowy opis  Monolithic Accelerometer With Signal Conditioning
Pobierz  16 Pages
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ADXL50–SPECIFICATIONS
ADXL50J/A
Parameter
Conditions
Min
Typ
Max
Units
SENSOR INPUT
Measurement Range
Guaranteed Full Scale
–50
+50
g
Nonlinearity
Best Fit Straight Line, 50 g FS
0.2
% of FS
Alignment Error
1
±1
Degrees
Transverse Sensitivity2
±2%
SENSITIVITY
Initial Sensitivity at VPR
+25
°C
16.1
19.0
21.9
mV/g
Temperature Drift
3
0.75/1.0
% of Reading
ZERO g BIAS LEVEL
at VPR
Initial Offset
1.55/1.60
1.80
2.05/2.00
V
vs. Temperature3
±15/35
mV
vs. Supply
VS = 4.75 V to 5.25 V
10
32
mV/V
NOISE PERFORMANCE
at VPR
Voltage Noise Density
BW = 10 Hz to 1 kHz
6.6
12
mg/
√Hz
Noise in 100 Hz Bandwidth
66
mg rms
Noise in 10 Hz Bandwidth
20
mg rms
FREQUENCY RESPONSE
3 dB Bandwidth
4
C1 = 0.022
µF (See Figure 22)
800
1300
Hz
3 dB Bandwidth
4
C1 = 0.0068
µF
10
kHz
Sensor Resonant Frequency
24
kHz
SELF TEST INPUT
Output Change at VPR
5
ST Pin from Logic “0” to “1”
–0.85
–1.00
–1.15
V
Logic “1” Voltage
2.0
V
Logic “0” Voltage
0.8
V
Input Resistance
To Common
50
k
+3.4 V REFERENCE
Output Voltage
3.350
3.400
3.450
V
Output Temperature Drift
3
±10
mV
Power Supply Rejection
DC, VS = +4.75 V to +5.25 V
1
10
mV/V
Output Current
Sourcing
500
µA
PREAMPLIFIER OUTPUT
Voltage Swing
0.25
VS – 1.4
V
Current Output
Source or Sink
30
80
µA
Capacitive Load Drive
100
pF
BUFFER AMPLIFIER
Input Offset Voltage
6
Delta from Nominal 1.800 V
±10
±25
mV
Input Bias Current
520
nA
Open-Loop Gain
DC
80
dB
Unity Gain Bandwidth
200
kHz
Output Voltage Swing
IOUT = ± 100 µA
0.25
VS – 0.25
V
Capacitive Load Drive
1000
pF
Power Supply Rejection
DC, VS = +4.75 V to +5.25 V
1
10
mV/V
POWER SUPPLY
Operating Voltage Range
4.75
5.25
V
Quiescent Supply Current
10
13
mA
TEMPERATURE RANGE
Operating Range J
0
+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–
OBSOLETE




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