器件名称:
80-0276-F
功能描述:
System Level ESD Mitigation
文件大小:
55.31KB 共5页
简 介:
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 AMPCOM MICIN2 MICIN1 VREF AVdd AVDD C8 .1 AVss R1 270 R2 1.8K AVDD C1 220 C2 .1 D1 1N4148 VCM P2.5 Microphone Input Section C3 2.2 C4 .047 C5 .1 C6 1.0 C7 .1 MICROPHONE C9 R3 510 C10 .01 D2 1N4148 3300pF 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 vi……
