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PDF MMA2301 Data sheet ( Hoja de datos )
| Número de pieza | MMA2301 | |
| Descripción | Surface Mount Micromachined Accelerometer | |
| Fabricantes | Freescale Semiconductor | |
| Logotipo |  |
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www.DFaretaeSshceeatl4eUS.ceommiconductor
Technical Data
Surface Mount
Micromachined Accelerometer
The MMA series of silicon capacitive, micromachined accelerometers feature
signal conditioning, a 4-pole low pass filter and temperature compensation.
Zero-g offset full scale span and filter cut-off are factory set and require no
external devices. A full system self-test capability verifies system functionality.
Features
• Integral Signal Conditioning
• Linear Output
• Ratiometric Performance
• 4th Order Bessel Filter Preserves Pulse Shape Integrity
• Calibrated Self-test
• Low Voltage Detect, Clock Monitor, and EPROM Parity Check Status
• Transducer Hermetically Sealed at Wafer Level for Superior Reliability
• Robust Design, High Shocks Survivability
Typical Applications
• Vibration Monitoring and Recording
• Impact Monitoring
Device Name
MMA2301D
MMA2301DR2
MMA2301EG
MMA2301EGR2
ORDERING INFORMATION
Temperature Range Case No.
Package
–40° to 125°C
475-01
SOIC-16
–40° to 125°C
475-01
SOIC16, Tape & Reel
–40° to 125°C
475-01
SOIC-16
–40° to 125°C
475-01
SOIC16, Tape & Reel
MMA2301D
Rev 4, 03/2006
MMA2301
MMA2301D: X-AXIS SENSITIVITY
MICROMACHINED
ACCELEROMETER
±200G
D SUFFIX
EG SUFFIX (Pb-FREE)
16-LEAD SOIC
CASE 475-01
G-Cell
Sensor
Integrator
Gain Filter Temp
VDD
VOUT
ST
Self-Test
Control Logic and
EPROM Trim Circuits
Oscillator
Clock
Generator
VSS
STATUS
Figure 1. Simplified Accelerometer Functional Block Diagram
N/C
N/C
N/C
ST
VOUT
STATUS
VSS
VDD
1
2
3
4
5
6
7
8
16 N/C
15 N/C
14 N/C
13 N/C
12 N/C
11 N/C
10 N/C
9 N/C
Figure 2. Pin Connections
© Freescale Semiconductor, Inc., 2006. All rights reserved.
1 page  
PINOUT DESCRIPTION
BASIC CONNECTIONS
N/C
N/C
N/C
ST
VOUT
STATUS
VSS
VDD
1
2
3
4
5
6
7
8
16 N/C
15 N/C
14 N/C
13 N/C
12 N/C
11 N/C
10 N/C
9 N/C
Table 3. Pin Descriptions
Pin No. Pin Name
Description
1 thru 3
N/C Leave unconnected.
4 ST Logic input pin used to initiate self-
test.
5 VOUT Output voltage of the accelerometer.
6 STATUS Logic output pin to indicate fault.
7
8
9 thru 13
VSS
VDD
Trim pins
The power supply ground.
The power supply input.
Used for factory trim. Leave
unconnected.
14 thru 16
— No internal connection. Leave
unconnected.
VDD
Logic
Input
C1
0.1 µF
MMA2301D
4 ST
6
8 VDD
VOUT 5
R1
1 kΩ
7 VSS
C2
0.01 µF
Status
Output
Signal
PCB Layout
STATUS
P1
ST P0
VOUT
R
A/D In
VSS 1 kΩ C 0.01 µF
VDD C 0.1 µF
VRH
C 0.1 µF
VSS
C 0.1 µF
VDD
Power Supply
Figure 5. Recommend PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
• Use a 0.1 µF capacitor on VDD to decouple the power
source.
• Physical coupling distance of the accelerometer to the
microcontroller should be minimal.
• 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 5
• Use an RC filter of 1 kΩ and 0.01 µF on the output of the
accelerometer to minimize clock noise (from the switched
capacitor filter circuit).
• PCB layout of power and ground should not couple power
supply noise.
• Accelerometer and microcontroller should not be a high
current path.
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.
This will prevent aliasing errors.
Figure 4. SOIC Accelerometer with Recommended
Connection Diagram
Sensors
Freescale Semiconductor
MMA2301D
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MMA2301.PDF ] | |
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