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Digital Accelerometer. MMA8491Q Datasheet

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Digital Accelerometer. MMA8491Q Datasheet






MMA8491Q Accelerometer. Datasheet pdf. Equivalent




MMA8491Q Accelerometer. Datasheet pdf. Equivalent





Part

MMA8491Q

Description

3-Axis Multifunction Digital Accelerometer



Feature


MMA8491Q 3-Axis Multifunction Digital A ccelerometer Rev. 2.1 — 26 April 201 6 Data sheet: Technical data COMPANY PUBLIC 1 General description The MMA84 91Q is a low voltage, 3-axis low-g acce lerometer housed in a 3 mm x 3 mm QFN p ackage. The device can accommodate two accelerometer configurations, acting as either a 45° tilt sensor or a digital output accelerometer.
Manufacture

NXP

Datasheet
Download MMA8491Q Datasheet


NXP MMA8491Q

MMA8491Q; with I2C bus. • As a 45° tilt sensor , the MMA8491Q device offers extreme ea se of implementation by using a single line output per axis. • As a digital output accelerometer, the 14-bit ±8 g accelerometer data can be read from the device with a 1 mg/LSB sensitivity. Th e extreme low power capabilities of the MMA8491Q will reduce the low data rate current consumption to .


NXP MMA8491Q

less than 400 nA per Hz. 2 Features and benefits • Extreme low power, 400 nA per Hz • Ultra-fast data output time, ~700 μs • VDD supply range of 1.95 V to 3.6 V • 3 mm x 3 mm, 0.65 mm pit ch with visual solder joint inspection • ±8 g full-scale range • 14-bit d igital output, 1 mg/LSB sensitivity • Output Data Rate (ODR), implementation based from < 1 Hz to 800 Hz1 • I2.


NXP MMA8491Q

C digital interface • 3-axis, 45° til t outputs 3 Typical applications • Sm art grid: tamper detect • Anti-theft • White goods tilt • Remote control s 1 The ODR for this device is user de fined by the period of the Enable pulse d signal. The maximum recommended frequ ency of the Enable signal or the ODR th at can be achieved for this device is 8 00 Hz. NXP Semiconductors M.

Part

MMA8491Q

Description

3-Axis Multifunction Digital Accelerometer



Feature


MMA8491Q 3-Axis Multifunction Digital A ccelerometer Rev. 2.1 — 26 April 201 6 Data sheet: Technical data COMPANY PUBLIC 1 General description The MMA84 91Q is a low voltage, 3-axis low-g acce lerometer housed in a 3 mm x 3 mm QFN p ackage. The device can accommodate two accelerometer configurations, acting as either a 45° tilt sensor or a digital output accelerometer.
Manufacture

NXP

Datasheet
Download MMA8491Q Datasheet




 MMA8491Q
MMA8491Q
3-Axis Multifunction Digital Accelerometer
Rev. 2.1 — 26 April 2016
Data sheet: Technical data
COMPANY PUBLIC
1 General description
The MMA8491Q is a low voltage, 3-axis low-g accelerometer housed in a 3 mm x 3 mm
QFN package. The device can accommodate two accelerometer configurations, acting
as either a 45° tilt sensor or a digital output accelerometer with I2C bus.
As a 45° tilt sensor, the MMA8491Q device offers extreme ease of implementation by
using a single line output per axis.
As a digital output accelerometer, the 14-bit ±8 g accelerometer data can be read from
the device with a 1 mg/LSB sensitivity.
The extreme low power capabilities of the MMA8491Q will reduce the low data rate
current consumption to less than 400 nA per Hz.
2 Features and benefits
Extreme low power, 400 nA per Hz
Ultra-fast data output time, ~700 μs
VDD supply range of 1.95 V to 3.6 V
3 mm x 3 mm, 0.65 mm pitch with visual solder joint inspection
±8 g full-scale range
14-bit digital output, 1 mg/LSB sensitivity
Output Data Rate (ODR), implementation based from < 1 Hz to 800 Hz1
I2C digital interface
3-axis, 45° tilt outputs
3 Typical applications
Smart grid: tamper detect
Anti-theft
White goods tilt
Remote controls
1 The ODR for this device is user defined by the period of the Enable pulsed signal. The maximum
recommended frequency of the Enable signal or the ODR that can be achieved for this device is 800 Hz.




 MMA8491Q
NXP Semiconductors
MMA8491Q
3-Axis Multifunction Digital Accelerometer
4 Ordering information
Table 1. Ordering information
Part Number
Temperature Range
MMA8491QT
–40 to +85 °C
MMA8491QR1
–40 to +85 °C
MMA8491QR2
–40 to +85 °C
Package
QFN 12
QFN 12
QFN 12
Shipping
Tray
1000 pc / Tape & Reel
5000 pc / Tape & Reel
5 Related documentation
The MMA8491Q device features and operations are described in a variety of reference
manuals, user guides, and application notes. To find the most current versions of these
documents:
1. Go to the NXP homepage at: http://www.nxp.com/
2. In the Keyword search box at the top of the page, enter the device number
MMA8491Q. In the Refine Your Result pane on the left, click on the Documentation
link.
6 Block diagram
Figure 1. Block Diagram
7 Pinout
MMA8491Q is hosted in a 12-pin 3 mm x 3 mm QFN package. Ten pins are used for
functions; two pins are unconnected. Refer to Table 2 for complete pin descriptions and
functions.
MMA8491Q
Data sheet: Technical data
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 26 April 2016
© NXP B.V. 2016. All rights reserved
2 / 28




 MMA8491Q
NXP Semiconductors
MMA8491Q
3-Axis Multifunction Digital Accelerometer
MMA8491Q
Byp 1
VDD 2
SDA 3
EN 4
10 Xout
9 Yout
8 Zout
7 Gnd
Figure 2. Pin connection diagram
Transparent top view
Table 2. Pin descriptions
Pin Symbol
Function
Description
Pin status
1 Byp Internal regulator The internal regulator voltage of 1.8 V is present on this Output
output capacitor pin. Connect to external 0.1 μF bypass capacitor.
connection
2
VDD
Power Supply Device power is supplied through the VDD line. Power
Input
supply decoupling capacitors should be placed as near as
possible to pin 1 of the device.
3
SDA
I2C Data
I2C Slave Data Line, open drain
Input/Output
7-bit I2C device address is 0x55
The SDA and SCL I2C connections are open drain, and
therefore usually require a pull-up resistor
4
EN
Enable pin
The Enable pin fully turns on the accelerometer system Input
when it is pulled up to logic high. The accelerometer
system is turned off when the Enable pin is logic low.
5
SCL
I2C Clock
I2C Slave Clock Line, open drain
Input
6 Gnd Ground Ground
Ground
7 Gnd Ground Ground
Ground
8
Zout
Push-pull Z-Axis Output is high when acceleration is > 0.688 g (axis is | Output
Tilt Detection
φ| > 45°).
Output
Output is low when acceleration is ≤ 0.688 g (axis is |φ|
9
Yout
Push-pull Y-Axis ≤ 45°).
Tilt Detection
These pins are push-pull output pins.
Output
Output
10
Xout
Push-pull X-Axis
Tilt Detection
Output
Output
11
NC
No internal
No internal connection
connection
12
NC
No internal
No internal connection
connection
MMA8491Q
Data sheet: Technical data
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 2.1 — 26 April 2016
© NXP B.V. 2016. All rights reserved
3 / 28



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