MMA8452QR1 Freescale Semiconductor, MMA8452QR1 Datasheet - Page 9

Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT

MMA8452QR1

Manufacturer Part Number
MMA8452QR1
Description
Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT
Manufacturer
Freescale Semiconductor
Datasheets

Specifications of MMA8452QR1

Sensing Axis
X, Y, Z
Acceleration
2 g, 4 g, 8 g
Digital Output - Number Of Bits
8 bit, 12 bit
Supply Voltage (max)
3.6 V
Supply Voltage (min)
1.95 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Digital Output - Bus Interface
I2C
Shutdown
Yes
Sensitivity
256 count/g, 512 count/g, 1024 count/g
Package / Case
QFN-16
Output Type
Digital
Rohs Compliant
Yes
Peak Reflow Compatible (260 C)
Yes
Acceleration Range
± 2g, ± 4g, ± 8g
No. Of Axes
3
Ic Interface Type
I2C
Sensor Case Style
QFN
No. Of Pins
16
Supply Voltage Range
1.95V To 3.6V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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2
2.1
Table 2. Mechanical Characteristics @ VDD = 2.5 V, VDDIO = 1.8 V, T = 25°C unless otherwise noted.
1. Dynamic Range is limited to 4g when the Low Noise bit in Register 0x2A, bit 2 is set.
2. Sensitivity remains in spec as stated, but changing Oversampling mode to Low Power causes 3% sensitivity shift. This behavior is also seen
3. Before board mount.
4. Post Board Mount Offset Specifications are based on an 8 Layer PCB, relative to 25°C.
5. Self-Test is one direction only.
Sensors
Freescale Semiconductor
Measurement Range
Sensitivity
Sensitivity Accuracy
Sensitivity Change vs. Temperature
Zero-g Level Offset Accuracy
Zero-g Level Offset Accuracy Post Board Mount
Zero-g Level Change vs. Temperature
Self-Test Output Change
ODR Accuracy
2 MHz
Output Data Bandwidth
Output Noise
Output Noise Low Noise Mode
Operating Temperature Range
when changing from 800 Hz to any other data rate in the Normal, Low Noise + Low Power or High Resolution mode.
X
Y
Z
Mechanical and Electrical Specifications
Mechanical Characteristics
(2)
Parameter
(1)
(5)
(3)
(1)
(4)
Normal Mode ODR = 400 Hz
Normal Mode ODR = 400 Hz
FS[1:0] 2g, 4g, 8g
FS[1:0] 2g, 4g, 8g
Test Conditions
FS[1:0] set to 00
FS[1:0] set to 01
FS[1:0] set to 10
FS[1:0] set to 00
FS[1:0] set to 01
FS[1:0] set to 10
FS[1:0] set to 00
FS[1:0] set to 01
FS[1:0] set to 10
FS[1:0] set to 0
-40°C to 85°C
2g Mode
4g Mode
8g Mode
2g Mode
4g Mode
8g Mode
2g Mode
4g Mode
8g Mode
4g Mode
TyOffPBM
Symbol
Noise
Noise
TCOff
TCSo
TyOff
Soa
BW
Top
Vst
FS
So
ODR/3
Min
-40
±0.008
±0.15
1024
+420
±2.5
Typ
+45
+64
126
512
256
±20
±30
±2
±4
±8
±2
99
ODR/2
Max
+85
MMA8452Q
counts/g
µg/√Hz
µg/√Hz
mg/°C
%/°C
Unit
LSB
mg
mg
%
%
Hz
°C
g
9

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