Datasheet > 80-0276-F

80-0276-F

更新时间： 2022-12-16 17:50:07

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其他 - ETC		/
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5页	55K
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System Level ESD Mitigation

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80-0276-F 数据手册

System Level

ESD Mitigation

DESIGN NOTE

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:

RSC4x

Microphone Input Section

AVDD

R1 270

1.8K

AVDD

2.2

.047 .1

1.0

220

1N4148

MICROPHONE

R3 510

C10

.01

3300pF

1N4148

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.

P/N 80-0276-F

12 3 4 5

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