ADXL323KCPZ-RL Analog Devices Inc, ADXL323KCPZ-RL Datasheet - Page 13

• Manufacturer Part Number: ADXL323KCPZ-RL
• Description: IC,Acceleration Detector,LLCC,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: iMEMS®r

Specifications of ADXL323KCPZ-RL

• Axis: X, Y
• Acceleration Range: ±3.6g
• Sensitivity: 300mV/g
• Voltage - Supply: 1.8 V ~ 5.25 V
• Output Type: Analog
• Bandwidth: 1Hz ~ 500Hz Selectable
• Mounting Type: Surface Mount
• Package / Case: 16-LQFN, CSP Exposed Pad
• Family Name: ADXL323
• Package Type: LFCSP EP
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Operating Supply Voltage (max): 5.25V
• Operating Temperature (min): -25C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Product Depth (mm): 4mm
• Product Height (mm): 1.43mm
• Product Length (mm): 4mm
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Compliant
• Other names: ADXL323KCPZ-RLTR

The ADXL323 output is ratiometric; therefore, the output
sensitivity (or scale factor) varies proportionally to the supply
voltage. At V
At V
The zero g bias output is also ratiometric, so the zero g output is
nominally equal to V
The output noise is not ratiometric but is absolute in volts;
therefore, the noise density decreases as the supply voltage
increases. This is because the scale factor (mV/g) increases,
while the noise voltage remains constant. At V
density is typically 180 μg/√Hz, while at V
density is typically 360 μg/√Hz.
Self-test response in g is roughly proportional to the square of
the supply voltage. However, when ratiometricity of sensitivity
is factored in with supply voltage, the self-test response in volts
is roughly proportional to the cube of the supply voltage. For
example, at V
approximately −700 mV for the X-axis and +700 mV for the Y-axis.
S
= 2 V, the output sensitivity is typically 190 mV/g.
S
S
= 5 V, the output sensitivity is typically 550 mV/g.
= 5 V, the self-test response for the ADXL323 is
S
/2 at all supply voltages.
X
Y
OUT
OUT
= 0g
= 1g
TOP
S
= 1.8 V, the noise
S
Figure 32. Output Response vs. Orientation to Gravity
X
Y
= 5 V, the noise
X
Y
OUT
OUT
OUT
OUT
TOP
TOP
= 1g
= 0g
= –1g
= 0g
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TOP
X
Y
X
Y
OUT
OUT
OUT
OUT
At V
for the X-axis and +40 mV for the Y-axis.
The supply current decreases as the supply voltage decreases.
Typical current consumption at V
current consumption at V
AXES OF ACCELERATION SENSITIVITY
= 0g
= –1g
Figure 31. Axes of Acceleration Sensitivity, Corresponding Output Voltage
= 0g
= 0g
S
= 1.8 V, the self-test response is approximately −40 mV
Increases When Accelerated Along the Sensitive Axis
GRAVITY
X
Y
OUT
OUT
= 0g
= 0g
S
= 1.8 V is 180 μA.
A
Y
S
= 5 V is 500 μA, and typical
ADXL323
A
X