Figure 1 MMA8452QR1 device package

Figure 2 MMA8452QR1 schematic symbol

Figure 3 SPARKFUN Triple Axis Accelerometer

Figure 4B Schematic of SPARKFUN Triple Axis Accelerometer

Table of Contents

What is MMA8452QR1？

The MMA8452QR1 is an accelerometer device used to measure acceleration forces. The MMA8452QR1 is a low power 3-axis accelerometer which is used to detect angle of tilt or inclination along the X, Y and Z axes. The MMA8452QR1 consist of 12-bits of resolution. The MMA8452QR1 measures the static acceleration of gravity in tilt-sensing applications.

Pin Configuration

PIN NO.	LABLE	DESCRIPTION
1	VDDIO	Internal power supply (1.62 V to 3.6 V).
2	BYP	Bypass capacitor (0.1 μF).
3	DNC	Do not connect to anything, leave pin isolated and floating.
4	SCL	I²C serial clock, open drain.
5	GND	Connect to ground.
6	SDA	I²C serial data.
7	SA0	I²C least significant bit of the device I²C address, I²C 7-bit address = 0x1C (SA0 = 0), 0x1D (SA0 = 1).
8	NC	Internally not connected.
9	INT2	Inertial interrupt 2, output pin.
10	GND	Connect to ground.
11	INT1	Inertial interrupt 1, output pin
12	GND	Connect to ground.
13	NC	Internally not connected.
14	VDD	Power supply (1.95 V to 3.6 V)
15	NC	Internally not connected
16	NC	Internally not connected (can be GND or VDD)

Features

Supply voltage: 1.95 V to 3.6 V
Interface voltage: 1.6 V to 3.6 V
Current consumption: 6 μA to 165 μA
±2 g/±4 g/±8 g dynamically selectable full-scale
Output data rates (ODR): 1.56 Hz to 800 Hz
99 μg/√Hz noise
I2C digital output interface
12-bit digital output
Two programmable interrupt pins for six interrupt sources
Orientation detection
High-pass filter data available real-time
Self-test
Three embedded channels of motion detection

Applications

Automobile
To measure seismic activity, inclination, machine vibration.
Impact study
Helmholtz Resonator
Counting Freight Trains
Package Monitoring
Vibration Analysis

ALTERNATIVES OF MMA8452QR1

If you are looking for alternatives of MMA8452QR1 then here is the list of some alternative digital accelerometer,

PART NO.	ACCELERATION RANGE	SENSITIVITY (LSB/G)	BANDWIDTH
KXTJ3-1057	±2g, 4g, 8g, 16g	1024 (±2g) ~ 128 (±16g)	800Hz
LIS2DE12TR	±2g, 4g, 8g, 16g	64 (±2g) ~ 5 (±16g)	0.5Hz ~ 2.69kHz
LIS2DH12TR	±2g, 4g, 8g, 16g	1000 (±2g) ~ 83 (±16g)	0.5Hz ~ 672Hz
BMA253	±2g, 4g, 8g, 16g	1024 (±2g) ~ 128 (±16g)	8Hz ~ 1kHz

WHERE TO USE MMA8452QR1?

Freescale’s MMA8452Q is a smart, low-power, three-axis, capacitive micro-machined accelerometer with 12 bits of resolution. It’s perfect for any project that needs to sense orientation or motion.

How MMA8452QR1 work?

Figure 5 MMA8452QR1 with Arduino UNO

Fig.5 shows connection diagram of Arduino to communicate with the MMA8452Q and interpret the data from the sensor. We simply have to supply the accelerometer with power (3.3V and GND), then hookup the SCL and SDA lines between devices. A couple of 330Ω resistors in series on each I²C line will help to perform some simple level shifting.

Next step is to download library and examples from link given below,

https://drive.google.com/open?id=1Fl2fLWWi1uFoLp-jjT43j9nlA0GQKyfq

After installing library, you need to open and upload MMA8452Q_Basic code to the Arduino which you can find at File > Examples > SFE_MMA8452Q > MMA8452Q_Basic.

By opening the serial monitor you can see acceleration values stream by, in addition to some information about the sensor’s orientation.

2D-VIEW OF MMA8452QR1

Figure 6 2-D VIEW OF MMA8452QR1

MMA8452QR1 Related Products Prices

Parts	Mfr.	Description	Stock	Prices
MMA8452QR1	Freescale Semiconductor - NXP	ACCELEROMETER 2-8G I2C 16QFN	6000	$0.788 Lowest
MMA8452QT	Freescale Semiconductor - NXP	ACCELEROMETER 2-8G I2C 16QFN	40000	$0.657 Lowest
MMA8451QR1	Freescale Semiconductor - NXP	ACCELEROMETER 2-8G I2C 16QFN	51000	$1.037 Lowest
MMA8450QT	Freescale Semiconductor - NXP	3-Axis, 8-bit/12-bit Digital Accelerometer	70	$4.381 Lowest