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ADXL377BCPZ-RL

P1-P3P4-P6P7-P9P10-P12P13-P13
ADXL377 Data Sheet
Rev. 0 | Page 6 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
N > 250 for all typical performance figures, unless otherwise noted. N is the number of parts tested and used to produce the histograms.
35
30
0
5
10
15
20
25
PERCENT OF POPULATION (%)
OUTPUT VOLTAGE (V)
1.4800
1.4825
1.4850
1.4875
1.4900
1.4925
1.4950
1.4975
1.5000
1.5025
1.5050
1.5075
1.5100
1.5125
1.5150
1.5175
1.5200
10765-003
Figure 3. X-Axis Zero g Output Voltage at 25°C, V
S
= 3 V
30
0
5
10
15
20
25
PERCENT OF POPULATION (%)
OUTPUT VOLTAGE (V)
1.4800
1.4825
1.4850
1.4875
1.4900
1.4925
1.4950
1.4975
1.5000
1.5025
1.5050
1.5075
1.5100
1.5125
1.5150
1.5175
1.5200
10765-004
Figure 4. Y-Axis Zero g Output Voltage at 25°C, V
S
= 3 V
90
80
70
60
50
40
30
20
10
0
PERCENT OF POPULATION (%)
OUTPUT VOLTAGE (V)
1.4800
1.4825
1.4850
1.4875
1.4900
1.4925
1.4950
1.4975
1.5000
1.5025
1.5050
1.5075
1.5100
1.5125
1.5150
1.5175
1.5200
10765-005
Figure 5. Z-Axis One g Output Voltage at 25°C, V
S
= 3 V
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
–60 –40 –20 0 20 40 60 80 100
1.480
1.485
1.490
1.495
1.500
1.505
1.510
1.515
1.520
1.525
10765-006
Figure 6. X-Axis Zero g Offset vs. Temperature, V
S
= 3 V
(14 Parts Soldered to PCB)
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
–60 –40 –20 0 20 40 60 80 100
1.480
1.485
1.490
1.495
1.500
1.505
1.510
1.515
1.520
1.525
10765-007
Figure 7. Y-Axis Zero g Offset vs. Temperature, V
S
= 3 V
(14 Parts Soldered to PCB)
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
–60 –40 –20 0 20 40 60 80 100
1.480
1.485
1.490
1.495
1.500
1.505
1.510
1.515
1.520
1.525
10765-008
Figure 8. Z-Axis Zero g Offset vs. Temperature, V
S
= 3 V
(14 Parts Soldered to PCB)
Data Sheet ADXL377
Rev. 0 | Page 7 of 12
25
0
5
10
15
20
PERCENT OF POPULATION (%)
SENSITIVITY (mV/g)
6.00
6.05
6.10
6.15
6.20
6.25
6.30
6.35
6.40
6.45
6.50
6.55
6.60
6.65
6.70
6.75
6.80
6.85
6.90
6.95
7.00
10765-009
Figure 9. X-Axis Sensitivity at 25°C, V
S
= 3 V
30
25
0
5
10
15
20
PERCENT OF POPULATION (%)
SENSITIVITY (mV/g)
6.00
6.05
6.10
6.15
6.20
6.25
6.30
6.35
6.40
6.45
6.50
6.55
6.60
6.65
6.70
6.75
6.80
6.85
6.90
6.95
7.00
10765-010
Figure 10. Y-Axis Sensitivity at 25°C, V
S
= 3 V
16
12
14
10
0
2
4
6
8
PERCENT OF POPULATION (%)
SENSITIVITY (mV/g)
6.00
6.05
6.10
6.15
6.20
6.25
6.30
6.35
6.40
6.45
6.50
6.55
6.60
6.65
6.70
6.75
6.80
6.85
6.90
6.95
7.00
10765-011
Figure 11. Z-Axis Sensitivity at 25°C, V
S
= 3 V
250
200
150
100
50
0
OUTPUT (g)
REFERENCE ACCELERATION (g)
0 50 100 150 200
Z-AXIS
X-AXIS
Y-AXIS
10765-012
Figure 12. Typical Output Linearity over the Dynamic Range
10
1
SENSITIVITY (mV/g)
FREQUENCY (Hz)
10 100 1k 10k
X-AXIS, Y-AXIS RESPONSE
Z-AXIS RESPONSE
10765-013
Figure 13. Typical Frequency Response
ADXL377 Data Sheet
Rev. 0 | Page 8 of 12
THEORY OF OPERATION
The ADXL377 is a complete 3-axis acceleration measurement
system with a typical measurement range of ±200 g. The ADXL377
contains a polysilicon, surface-micromachined sensor and signal
conditioning circuitry to implement an open-loop acceleration
measurement architecture. The output signals are analog voltages
that are proportional to acceleration. The accelerometer can mea-
sure the static acceleration of gravity in tilt-sensing applications,
as well as dynamic acceleration resulting from motion, shock,
or vibration.
The sensor is a polysilicon, surface-micromachined structure
built on top of a silicon wafer. Polysilicon springs suspend the
structure over the surface of the wafer and provide resistance
against acceleration forces. Deflection of the structure is mea-
sured using a differential capacitor that consists of independent
fixed plates and plates attached to the moving mass. The fixed
plates are driven by 180° out-of-phase square waves. Acceleration
deflects the moving mass and unbalances the differential capacitor,
resulting in a sensor output whose amplitude is proportional to
acceleration. Phase-sensitive demodulation techniques are then
used to determine the magnitude and direction of the acceleration.
The demodulator output is amplified and brought off chip through
a 32 kΩ resistor. The user then sets the signal bandwidth of the
device by adding a capacitor. This filtering improves measurement
resolution and helps prevent aliasing.
MECHANICAL SENSOR
The ADXL377 uses a single structure for sensing the accelera-
tion in the x-axis, y-axis, and z-axis. As a result, the three sense
directions are highly orthogonal with little cross-axis sensitivity.
Mechanical misalignment of the sensor die to the package or
misalignment of the package to the PCB is the chief source of
cross-axis sensitivity. Mechanical misalignment can be calibrated
at the system level.
PERFORMANCE
Rather than using additional temperature compensation circuitry,
the ADXL377 uses innovative design techniques to ensure high
performance. As a result, there is neither quantization error nor
nonmonotonic behavior, and temperature hysteresis is very low.
P1-P3P4-P6P7-P9P10-P12P13-P13

ADXL377BCPZ-RL

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Buy ADXL377BCPZ-RL
Manufacturer:
Analog Devices Inc.
Description:
Motion & Position Sensors Accelerometers 3-Axis High g Analog MEMS
Lifecycle:
New from this manufacturer.
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