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參數(shù)資料
| 型號(hào)： | MXD2020HL |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| 中文描述： | 改進(jìn)的，超低噪音雙軸加速度計(jì)的數(shù)字輸出 |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大?。?/td> | 289K |
| 代理商： | MXD2020HL |
CONVERTING THE DIGITAL OUTPUT TO AN
ANALOG OUTPUT
The PWM output can be easily converted into an analog
output by integration. A simple RC filter can do the
conversion. Note that that the impedance of the circuit
following the integrator must be much higher than the
impedance of the RC filter. Reference figure 4 for an
example.
MEMSIC MXD2020GL/ML/NL/HL
Page 6 of 7
2002.08.29.1
1uF
DOUT
AOUT
10K
MEMSIC
Accel.
Figure 4: Converting the digital output to an analog voltage
POWER SUPPLY NOISE REJECTION
Two capacitors and a resistor are recommended for best
rejection of power supply noise (reference Figure 5 below).
The capacitors should be located as close as possible to the
device supply pins (V
DA
, V
DD
). The capacitor lead length
should be as short as possible, and surface mount capacitors
are preferred. For typical applications, capacitors C1 and
C2 can be ceramic 0.1 μF, and the resistor R can be 10
.
In 5V applications where power consumption is not a
concern, maximum supply noise rejection can be obtained
by significantly increasing the values of C1, C2 and R. For
example, C1 = C2 = 0.47 μF and R = 270
will virtually
eliminate power supply noise effects.
R
MEMSIC
Accelerometer
VDA
C1
C2
VDD
V SUPPLY
Figure 5: Power Supply Noise Rejection
PCB LAYOUT AND FABRICATION SUGGESTIONS
1.
The Sck pin should be grounded to minimize noise.
2.
Liberal use of ceramic bypass capacitors is
recommended.
3.
Robust low inductance ground wiring should be used.
4.
Care should be taken to ensure there is “thermal
symmetry” on the PCB immediately surrounding the
MEMSIC device and that there is no significant heat
source nearby.
5.
A metal ground plane should be added directly beneath
the MEMSIC device. The size of the plane should be
similar to the MEMSIC device’s footprint and be as
thick as possible.
6.
Vias can be added symmetrically around the ground
plane. Vias increase thermal isolation of the device
from the rest of the PCB.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MXD2020ML | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD2020NL | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD2020G | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020H | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020M | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MXD2020M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020ML | 制造商:MEMSIC 功能描述:ACCELEROMETER 2 AXIS ?.7G LCC8 制造商:MEMSIC 功能描述:ACCELEROMETER, 2 AXIS, 1.7G, LCC8 制造商:MEMSIC 功能描述:ACCELEROMETER, 2 AXIS, 1.7G, LCC8; MEMS Sensor Output:PWM; Measurement Axis:X, Y; Acceleration Range: 1.7g; Supply Voltage Min:3V; Supply Voltage Max:5.25V; Sensor Case Style:LCC; No. of Pins:8; Sensitivity Min:19%/g; Sensitivity ;RoHS Compliant: Yes |
| MXD2020N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020NL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD202AC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Cost, 2.0g, Dual Axis Accelerometer with Digital Outputs |
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