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參數(shù)資料
| 型號(hào)： | 80-0276-F |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | System Level ESD Mitigation |
| 中文描述： | 系統(tǒng)級(jí)靜電緩解 |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大?。?/td> | 63K |
| 代理商： | 80-0276-F |
System Level
ESD Mitigation
DESIGN NOTE
2006 Sensory Inc.
P/N 80-0276-F
1
Introduction
The following is a list of industry best-practice suggestions that our research indicates may help improve
system-level ESD protection. You may wish to independently confirm these suggestions.
The suggestions have been broken down into four main categories, and the suggestions within each category
have been noted as follows:
(Recommended) – Potentially effective for little or no additional cost.
(Desirable) – Should be included in systems which can tolerate higher system cost (such set top boxes, etc)
Sensory highly recommends that this procedure be used to design and test ALL new product designs.
A. Making Your Circuits More Resistant To ESD:
1.
(Recommended) Put clamp diodes such as 1N4148 (D1 and D2) and a 510 ohm series resistor (R3) and a
0.1 uF shunt capacitor (C10) in the microphone circuit as shown in Figure 1:
AVDD
AVDD
MICROPHONE
1.0
C6
C7
.1
C10
.01
1N4148
D2
C8
.1
1.8K
R2
220
C1
270
R1
RSC4x
A
V
M
M
A
V
A
P
510
R3
C9
3300pF
1N4148
D1
2.2
C3
C2
.1
C4
.047
C5
.1
Microphone Input Section
Figure 1 – Microphone ESD protection
2. (Recommended) Put 0.1uF capacitors across all pushbutton inputs.
3. (Recommended) Put 1K to 10K ohm series resistors on input signals if they travel to the outside or travel
long distances.
4. (Recommended) Put a 10K ohm series resistor and a 1N4148 diode to ground at the reset pin as shown in
Figure 2 if it travels to the outside (usually via a user reset pushbutton) or otherwise travels a long distance.
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