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I am designing one four layer ADS1298 (TI) based analog PCB. Signal frequency is about 1.5Hz to 3.79kHz. It is a four layer board with most of the components and traces on top layer and the ground plane/power plane on the second and third layer.

Since the board needs to be small, i am thinking about using small package resistors and capacitors, such as 0402. I know that for resistors, the smaller size leads to lower power. However, it is not a big issue in my case.

My question is whether there are some other things I need to pay attention to for using smaller package passive components.

Edit 2: found this link talking about capacitor selection. Still looking for the resistor related articles.....

What parameters to look at when comparing capacitors of same value but different package size

Thanks

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  • \$\begingroup\$ I saw the other question you posed. The best thing in this case might be to get the reference design package, study it, and implement the parts you want. ti.com/tool/ads1298ecgfe-pdk \$\endgroup\$ – pgvoorhees Jul 6 '16 at 13:36
  • \$\begingroup\$ Take the part of interest and look at it's specs! That's the only way to find out. \$\endgroup\$ – Eugene Sh. Jul 6 '16 at 13:40
  • \$\begingroup\$ I got this package. The questions I asked were practical design questions. I am not worrying about the function of the chip anymore. \$\endgroup\$ – user2736482 Jul 6 '16 at 13:40
  • \$\begingroup\$ Duplicate of electronics.stackexchange.com/questions/84946/… although what you're doing is not high frequency, the same advantages are obtained. \$\endgroup\$ – Captainj2001 Jul 6 '16 at 13:42
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    \$\begingroup\$ For capacitors, there are more lies than capacitance as you go up in values. Your "1 uF, 16 V" is far less than 1 uF @ 16 V, although it is 1 uF at 0 V and can withstand 16 V. When you go down in size, this "phenomon" becomes worse. For small values, < ~47 nF, no problem with small packages. \$\endgroup\$ – winny Jul 6 '16 at 13:43

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