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PDF MMA1213 Data sheet ( Hoja de datos )
| Número de pieza | MMA1213 | |
| 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
MMA1213D
MMA1213DR2
MMA1213EG
MMA1213EGR2
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
MMA1213D
Rev 2, 03/2006
MMA1213
MMA1213D: Z AXIS SENSITIVITY
MICROMACHINED
ACCELEROMETER
±50g
D SUFFIX
EG SUFFIX (Pb-FREE)
16-LEAD SOIC
CASE 475-01
G-Cell
Sensor
Integrator
Temp
Gain Filter Comp
VDD
VOUT
ST
Self-test
Control Logic &
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
N/C
N/C
N/C
ST
VOUT
STATUS
VSS
VDD
1
2
3
4
5
6
7
8
BASIC CONNECTIONS
PCB Layout
16 N/C
15 N/C
14 N/C
13 N/C
12 N/C
11 N/C
10 N/C
9 N/C
STATUS
P1
ST P0
VOUT
VSS
VDD
R A/D In
1 kΩ C 0.01 µF
C 0.1 µF
VRH
C 0.1 µF
VSS
C 0.1 µF
VDD
Table 3. Pin Descriptions
Pin No. Pin Name
Description
1 thru 3
— 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
MMA1213D
4 ST
8 VDD
VOUT
6
R1
1 kΩ
5
7 VSS
C2
0.01 µF
STATUS
Output
Signal
Power Supply
Figure 6. Recommended PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
1. Use a 0.1 µF capacitor on VDD to decouple the power
source.
2. Physical coupling distance of the accelerometer to the
microcontroller should be minimal.
3. 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.
4. 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).
5. PCB layout of power and ground should not couple
power supply noise.
6. Accelerometer and microcontroller should not be a
high current path.
7. 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 5. SOIC Accelerometer with Recommended
Connection Diagram
Sensors
Freescale Semiconductor
MMA1213D
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MMA1213.PDF ] | |
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