Sensors

2

Freescale Semiconductor

MMA7340L

Figure 2. 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 volts 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 1. 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 axis)

±5000

g

Supply Voltage

–0.3 to +3.6

V

1. Dropped onto concrete surface from any axis.

1.8

m

Storage Temperature Range

–40 to +125

°C

Sleep

Self Test

C to V

CONVERTER

X

OUT

Y

OUT

Z

OUT

OSCILLATOR

CLOCK

GEN

g-Select

X-TEMP

COMP

G-CELL

SENSOR

GAIN

+

FILTER

CONTROL LOGIC

NVM TRIM

CIRCUITS

Y-TEMP

COMP

Z-TEMP

COMP

V

DD

V

SS

SELFTEST

Sleep

Self Test

C to V

CONVERTER

X

OUT

Y

OUT

Z

OUT

OSCILLATOR

CLOCK

GEN

g-Select

X-TEMP

COMP

G-CELL

SENSOR

GAIN

+

FILTER

CONTROL LOGIC

NVM TRIM

CIRCUITS

Y-TEMP

COMP

Z-TEMP

COMP

V

DD

V

SS

SELFTEST