IC Supply Caps

argonrepublic · 17th February 2010, 05:36 PM

I am assembling a circuit using INA217 and DRV134. Texas instruments recomends .1uF on the power legs of the INA217 and 1uF on the legs of the DRV134. What type should I use? Datasheet does not specify a polarity on these caps but I did see another project that used polar electrolytic.

Minion · 17th February 2010, 11:05 PM

You would use Non Polarized Caps , Like Poly film , Electrolytics don"t come in 0.1uF values and only Electrolytics (and tantalum) are Polarized , For the 1uf if you use Electrolytics you would for the Positive Rail put the Caps positive to the Positive rail and negitive to ground and for the negitive rail put the negitive of the Cap to the Negitive Rail and the Positive of the Cap to Ground ......

Cheers

djQUAN · 18th February 2010, 03:29 PM

I have seen 0.1uF electrolytics. I have no idea why they even made such things.

the caps in the datasheet are most probably monolithic ceramic caps they are available up to 22uF or so (in SMD). those are supply bypassing so they need to have good HF performance. ceramics are good at that.

17th February 2010, 05:36 PM	#1
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	IC Supply Caps I am assembling a circuit using INA217 and DRV134. Texas instruments recomends .1uF on the power legs of the INA217 and 1uF on the legs of the DRV134. What type should I use? Datasheet does not specify a polarity on these caps but I did see another project that used polar electrolytic.

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17th February 2010, 11:05 PM	#2
Minion diyAudio Member Join Date: May 2006	You would use Non Polarized Caps , Like Poly film , Electrolytics don"t come in 0.1uF values and only Electrolytics (and tantalum) are Polarized , For the 1uf if you use Electrolytics you would for the Positive Rail put the Caps positive to the Positive rail and negitive to ground and for the negitive rail put the negitive of the Cap to the Negitive Rail and the Positive of the Cap to Ground ...... Cheers

18th February 2010, 03:29 PM	#3
djQUAN diyAudio Member Join Date: May 2004 Location: manila	I have seen 0.1uF electrolytics. I have no idea why they even made such things. the caps in the datasheet are most probably monolithic ceramic caps they are available up to 22uF or so (in SMD). those are supply bypassing so they need to have good HF performance. ceramics are good at that.

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