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Sensors
Freescale Semiconductor 7
MMA7660FC
Figure 3. Simplified Accelerometer Functional Block Diagram
ELECTRO STATIC DISCHARGE (ESD)
WARNING: This device is sensitive to electrostatic discharge.
Although the Freescale accelerometer contains internal 2000 V ESD protection circuitry, extra precaution must be taken by
the user to protect the chip from ESD. A charge of over 2000 V can accumulate on the human body or associated test equipment.
A charge of this magnitude can alter the performance or cause failure of the chip. When handling the accelerometer, proper ESD
precautions should be followed to avoid exposing the device to discharges which may be detrimental to its performance.
Table 2. Maximum Ratings
(Maximum ratings are the limits to which the device can be exposed without causing permanent damage.)
Rating Symbol Value Unit
Maximum Acceleration (all axes, 100 μs) g
max
10,000 g
Analog Supply Voltage AV
DD
-0.3 to +3.6 V
Digital I/O pins Supply Voltage DV
DD_IO
-0.3 to +3.6 V
Drop Test D
drop
1.8 m
Storage Temperature Range T
stg
-40 to +125 °C
Table 3. ESD And Latch-up Protection Characteristics
Rating Symbol Value Unit
Human Body Model HBM ±2000 V
Machine Model MM ±200 V
Charge Device Model CDM ±500 V
Latch-up current at T
A
= 85°C ±100 mA
AVDD
DVDD
VSS
X-axis
Transducer
Y-axis
Transducer
Z-axis
Transducer
MUX
CONTROL LOGIC
INT
C-to-V
CONVERTER
AMP
ADC
SDA
SCL
OFFSET
TRIM
GAIN
TRIM
I
2
C
INTERNAL
OSC
CLOCK
GEN