For the installation of the capacitance, first there is install the distance.
Should the minimum value of capacitance, the highest resonance frequency and decoupling minimum radius, so in the most close to the position of the wafer.
Capacitance values older can distance is farther, the outermost layer placed capacitance value maximum.
However, all of the chip decoupling capacitor
s are close to the chip.
The following figure is an example of a placement.
One more thing to note that in place, it is best evenly distributed around the perimeter of the chip, for each capacity value level have to be like this.
Usually chip was considered in the design of the power and ground pins are positioned, are generally distributed evenly in the four side of the wafer.
Voltage disturbance, therefore, all around the chip, decoupling must also be evenly decoupling of the entire chip area.
680 of the above, if the pf capacitor is on the top of the wafer, due to the radius of decoupling problems, so can't for wafer lower voltage disturbance decoupling very well.
'The ground plane, figure 2 intuitive shows the current return path.
The first method: from the bonding pad long lead and then connected via, it will introduce a lot of parasitic inductance, must avoid doing so, this is the worst of the installation.
Fourth method: in the welding plate holes on both sides, compared to the third method, the equivalent capacitance each side is through via parallel connected to the power plane and ground plane, little more than a third type of parasitic inductance, as long as the space allows, as far as possible in this way.
Finally a way: in the welding plate punching directly, parasitic inductance minimum, but the welding is likely appear problem, whether to use depends on the processing capability and the way.
Shenzhen Shen MaoXin Electronics Co., Ltd. guarantees to providing quality products and services.
Now you can buy cheap at wholesale price at Shenzhen Shen MaoXin Electronics Co., Ltd.! Do visit Shenmao Capacitors for great deals!
Our commitment to equal employment and diversity is a global one as we serve customers and employ people around the world. Shenzhen Shen MaoXin Electronics Co., Ltd. finds it as a business imperative that is essential to thriving in a competitive global marketplace.
Lucky to know that you are not alone in the face of electrolytic capacitor suppliers issue. Let Shenzhen Shen MaoXin Electronics Co., Ltd. be your selected electrolytic capacitor expert in providing first class to help you out.
Our company specializes in manufacturing electrolytic capacitor mainly electrolytic capacitor suppliers.