参数资料
型号: KITMMA955XLEVM
厂商: Freescale Semiconductor
文件页数: 14/26页
文件大小: 0K
描述: KIT EVALUATION FOR MMA955XL
标准包装: 1
传感器类型: 加速计,3 轴
传感范围: ±2g,4g,8g
接口: I²C
灵敏度: 0.061mg/LSB,0.122mg/LSB,0.244mg/LSB
嵌入式:
已供物品: 2 个板,线缆,文档
已用 IC / 零件: MMA955XL
4
Mechanical and Electrical Specifications
This section contains electrical specification tables and reference timing diagrams for the MMA955xL device, including detailed
information on power considerations, DC/AC electrical characteristics, and AC timing specifications.
4.1
Definitions
Cross-axis sensitivity
Full range
The proportionality constant that relates a variation of accelerometer output to cross acceleration. This
sensitivity varies with the direction of cross acceleration and is primarily due to misalignment.
The algebraic difference between the upper and lower values of the input range. Refer to the input/
output characteristics.
Hardware compensated Sensor modules on this device include hardware-correction factors for gain and offset errors that are
calibrated during factory test using a least-squares fit of the raw sensor data.
Linearity error
Nonlinearity
Pin group
Software compensated
Warm-up time
The deviation of the sensor output from a least-squares linear fit of the input/output data.
The systematic deviation from the straight line that defines the nominal input/output relationship.
the clustering of device pins into a number of logical pin groupings to simplify and standardize electrical
data sheet parameters. Pin groups are defined in Section 4.2, “Pin Groups” .
Freescale’s advanced non-linear calibration functions that—with the first-order hardware gain and off-
set calibration features—improve sensor performance.
The time from the initial application of power for a sensor to reach its specified performance under the
documented operating conditions.
4.2
Pin Groups
The following pin groups are used throughout the remainder of this section.
Group 1 RESETB
Group 2 RESERVED
Group 3 RGPIO[9:0]
4.3
Absolute Maximum Ratings
Absolute maximum ratings are the limits the device can be exposed to without permanently damaging it. Absolute maximum rat-
ings are stress ratings only; functional operation at these ratings is not guaranteed. Exposure to absolute maximum ratings con-
ditions for extended periods may affect reliability.
This device contains circuitry to protect against damage due to high static voltage or electrical fields. It is advised, however, that
normal precautions be taken to avoid application of any voltages higher than maximum-rated voltages to this high-impedance
circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (for instance, either V SS
or V DD ).
Table 4. Absolute maximum ratings
Rating
Digital supply voltage
Analog supply voltage
Voltage difference, V DD to V DDA
Voltage difference, V SS to V SSA
Input voltage
Input/Output pin-clamp current
Output voltage range (Open-Drain Mode)
Storage temperature
Mechanical shock
Symbol
V DD
V DDA
V DD - V DDA
V SS - V SSA
V In
I C
V OUTOD
T stg
SH
Minimum
-0.3
-0.3
-0.1
-0.1
-0.3
-20
-0.3
-40
Maximum
2.0
2.0
0.1
0.1
V DD + 0.3
20
V DD + 0.3
125
5k
Unit
V
V
V
V
V
mA
V
? C
g
MMA955xL
Sensors
14
Freescale Semiconductor, Inc.
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