ADXL78
Rev. B | Page 3 of 12
SPECIFICATIONS
1
At T
A
= −40°C to +105°C, 5.0 V dc ± 5%, acceleration = 0 g, unless otherwise noted.
Table 1.
Model No. AD22279 Model No. AD22280 Model No. AD22281
Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit
SENSOR
Output Full-Scale Range I
OUT
≤ ±100 μA 37 55 70
g
Nonlinearity 0.2 2 0.2 2 0.2 2 %
Package Alignment Error 1 1 1 Degree
Cross-Axis Sensitivity −5 +5 −5 +5 −5 +5 %
Resonant Frequency 24 24 24 kHz
Sensitivity, Ratiometric
(Over Temperature)
V
DD
= 5 V, 100 Hz 52.25 55 57.75 36.1 38 39.9 25.65 27 28.35 mV/g
OFFSET
Zero-g Output Voltage
(Over Temperature)
2
V
OUT
− V
DD
/2,
V
DD
= 5 V
−200 +200 −150 +150 −150 +150 mV
NOISE
Noise Density
10 Hz − 400 Hz,
5 V
1.1 3 1.4 3 1.8 3.5 mg/√Hz
Clock Noise 5 5 5 mV p-p
FREQUENCY RESPONSE 2-pole Bessel
−3 dB Frequency 360 400 440 360 400 440 360 400 440 Hz
−3 dB Frequency Drift
25°C to
T
MIN
or T
MAX
2 2 2 Hz
SELF-TEST
Output Change
(Cube vs. V
DD
)
3
V
DD
= 5 V 440 550 660 304 380 456 216 270 324 mV
Logic Input High V
DD
= 5 V 3.5 3.5 3.5 V
Logic Input Low V
DD
= 5 V 1 1 1 V
Input Resistance
Pull-down
resistor to GND
30 50 30 50 30 50 kΩ
OUTPUT AMPLIFIER
Output Voltage Swing I
OUT
= ±400 μA 0.25 V
DD
− 0.25 0.25 V
DD
− 0.25 0.25 V
DD
− 0.25 V
Capacitive Load Drive 1000 1000 1000 pF
PREFILTER HEADROOM 280 400 560
g
CFSR @ 400 kHz 5 4 3 V/V
POWER SUPPLY (V
DD
) 4.75 5.25 4.75 5.25 4.75 5.25 V
Functional Range 3.5 6 3.5 6 3.5 6 V
Quiescent Supply Current V
DD
= 5 V 1.3 2 1.3 2 1.3 2 mA
TEMPERATURE RANGE −40 +105 −40 +105 −40 +105 °C
1
All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed.
2
Zero g output is ratiometric.
3
Self-test output at V
DD
= (Self-Test Output at 5 V) × (V
DD
/5 V)
3
.
