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PDF MMA6270Q Data sheet ( Hoja de datos )
| Número de pieza | MMA6270Q | |
| Descripción | Dual Axis Low-g Micromachined Accelerometer | |
| Fabricantes | Freescale Semiconductor | |
| Logotipo |  |
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Freescale Semiconductor
Technical Data
±1.5 g - 6 g Dual Axis Low-g
Micromachined Accelerometer
The MMA6270Q low cost capacitive micromachined accelerometer features
signal conditioning, a 1-pole low pass filter, temperature compensation and g-
Select which allows for the selection among four sensitivities. Zero-g offset full
scale span and filter cut-off are factory set and require no external devices.
Includes a Sleep Mode that makes it ideal for handheld battery powered
electronics.
Features
• Selectable Sensitivity (1.5 g / 2 g / 4 g / 6 g)
• Low Current Consumption: 500 µA
• Sleep Mode: 3 µA
• Low Voltage Operation: 2.2 V – 3.6 V
• 6 mm x 6 mm x 1.45 mm QFN
• High Sensitivity (800 mV/g @1.5 g)
• Fast Turn On Time
• Integral Signal Conditioning with Low Pass Filter
• Robust Design, High Shocks Survivability
• Pb-Free Terminations
• Environmentally Preferred Package
• Low Cost
Typical Applications
• Laptop PC: Freefall Detection, Anti-Theft
• Cell Phone: Image Stability, Text Scroll, Motion Dialing, E-Compass
• PDA: Text Scroll
• Navigation and Dead Reckoning: E-Compass Tilt Compensation
• Gaming: Tilt and Motion Sensing, Event Recorder
• Robotics: Motion Sensing
• Appliances: Vibration Sensing
Device Name
MMA6270Q
MMA6270QR2
ORDERING INFORMATION
Temperature
Range
Package
Drawing
Package
– 20 to +85°C 98ASA10651D
QFN-16, Tube
– 20 to +85°C 98ASA10651D QFN-16,Tape & Reel
MMA6270Q
Rev 1.0 2/2006
MMA6270Q
MMA6270Q: XY AXIS
ACCELEROMETER
±1.5 g / 2 g / 4 g / 6 g
Bottom View
16 LEAD
QFN
98ASA10651D
Top View
16 15 14 13
g-Select1 1
12
Sleep
Mode
g-Select2 2
11 N/C
VDD 3
10 N/C
VSS 4
9 N/C
5678
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2006. All rights reserved.
1 page  
Pin Descriptions
Top View
BASIC CONNECTIONS
PCB Layout
Connection Diagram
g-Select1 1
g-Select2 2
VDD 3
VSS 4
16 15
56
14 13
12 Sleep Mode
11 NC
10 NC
9 NC
78
Figure 4. Pinout Description
Table 4. Pin Descriptions
Pin No.
1
2
3
4
5-7
8 - 11
12
13
14
15
16
Pin Name
g-Select1
g-Select2
VDD
VSS
N/C
N/C
Sleep Mode
N/C
YOUT
XOUT
N/C
Description
Logic input pin to select g level.
Logic input pin to select g level.
Power Supply Input
Power Supply Ground
No internal connection.
Leave unconnected.
Unused for factory trim.
Leave unconnected.
Logic input pin to enable product or
Sleep Mode.
No internal connection.
Leave unconnected
Y direction output voltage.
X direction output voltage.
No internal connection.
Leave unconnected.
Logic
Inputs
1 g-Select1
VDD
0.1 µF
Logic
Input
2 g-Select2
MMA6270Q
3 VDD
YOUT 14
1 kΩ
4 VSS
12 Sleep Mode
0.1 µF
XOUT 15 1 kΩ
0.1 µF
Figure 5. Accelerometer with Recommended
Analog Integrated Circuit Device Data
Freescale Semiconductor
POWER SUPPLY
VDD
VSS
Sleep Mode
g-Select1
C
C VRH
P0
P1
g-Select2
P2
XOUT
R
C
A/DIN
VDD
C
VSS
YOUT
R
C
A/DIN
Figure 6. Recommended PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
1. Use 0.1 µF capacitor on VDD to decouple the power
source. Do not exceed capacitor values of 2.2 or
3.3 µF.
2. Physical coupling distance of the accelerometer to
the microcontroller should be minimal.
3. Flag underneath package is connected to ground.
4. Place a ground plane beneath the accelerometer to
reduce noise, the ground plane should be attached to
all of the open ended terminals shown in Figure 6.
5. Use an RC filter with 1.0 kΩ and 0.1 µF on the
outputs of the accelerometer to minimize clock noise
(from the switched capacitor filter circuit).
6. PCB layout of power and ground should not couple
power supply noise.
7. Accelerometer and microcontroller should not be a
high current path.
8. A/D sampling rate and any external power supply
switching frequency should be selected such that
they do not interfere with the internal accelerometer
sampling frequency (11 kHz for the sampling
frequency). This will prevent aliasing errors.
MMA6270Q
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MMA6270Q.PDF ] | |
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