Max 4053 vs cd4053 vs nlas 4053

[tommia]

Any comments on the difference for audio switching?

 

[JohnRoberts]

Look at the data sheets. Low on resistance will generally be good for lower distortion.

JR

 

[tommia]

The on resistance looks very similar esp. for my application: switching between feedback resistors on an opamp. The intention is to use them powered by +/-5V

 

[zamproject]

If you need lower Ron possible have a look at DG41x series.

 

[Bo Deadly]

Bear in mind that the really low Ron gates tend to have higher capacitance. Switching feedback resistors should be fine but be careful switching gain resistors in a typical high gain non-inverting amp because the capacitance will effectively make the gain high at high frequency. If you're not 100% sure about how to do it, post a schem.

 

[Bo Deadly]

I just noticed a new analog gate that looks quite impressive:

Part: MAX20336/MAX20337
Ron: 0.2 ohms (totally flat)
Icont: 500mA
Vcc: 5V
C: ~20pF

Claims to pass +-5V signals from only +5V supply with very low distortion.

Considering that converters cannot even produce / consume levels that high, these are legit for modern "pro" gear.

You would definitely need to do the stencil, solder paste, tweezers, toaster oven thing though.

 

[JohnRoberts]

I used CMOS transfer gates for electronic switching inside a console back in the 80s. If you switch the resistors at the virtual earth input of an inverting op amp the voltage there is near zero. Of course when the gate is switched open circuit the voltage can approach the output voltage of the op amp. There are multiple concerns for good sound quality. Gate capacitance can introduce clicks.

For today's TMI maybe do a search, I am pretty sure I shared about this in this forums over the years. A trick I used back several decades ago was to use multiple input and feedback resistor pairs and alternately connecting them to the - input to complete the op amp NF circuit. This way any nonlinearities from the transfer gates are reduced because of negative feedback (it was below my bench THD residual measurement capability back then.) IIRC I also shunted the unused resistor pairs to ground to improve crosstalk performance.

JR

 

[ruffrecords]

There can be surprising undocumented differences between parts from different fabs. Back in the 1980s we used these in the design of the Dragon 32 home computer to multiplex the joysticks to the ADC. Some brands of 4053 would self oscillate at about 2MHz.

Cheers

Ian

 

[JohnRoberts]

There can be surprising undocumented differences between parts from different fabs. Back in the 1980s we used these in the design of the Dragon 32 home computer to multiplex the joysticks to the ADC. Some brands of 4053 would self oscillate at about 2MHz.

Cheers

Ian

cmos logic uses P and N MOS parts both conducting at the same time working against each other. It is easy to see how process variation could affect behavior, especially with clever off the sheet designs.

JR

 

[Matt Syson]

I used to have a box of 'rejected' analog switching chips (4053) which were from one manufacturer which worked just fine in most circuits but introduced clicks ? when used in one specific circuit arrangement. Paralelling the sections can help with lowering 'on' resistance BUT doubles feedthrough clicks as as ever there are swings and roundabouts and now availability package variables and cost.
Matt S

 

[tommia]

Thanks for all the interesting design tips. But the question was more like what are your experiences between max4053, cd4053, others with the same footprint and apparently also different brands? At 10 times the price there must be a significant difference.

 

[ccaudle]

At 10 times the price there must be a significant difference.

That kind of thinking will lead you down a lot of wrong paths. The correct way to think about it is either "at 10 times the price they probably have some customers who are willing to pay them that" or possibly "at 10 times the price they must not care whether they sell any of those parts any more or not."

 

[tommia]

It looks like the 74hct4053 will be the winner. Very cheap, resistance is almost as low as max4053, the switch capacitance is very low.

 

[audiomaker]

I've used ADG1611/12/13 for this type of thing. Good Ron flatness helps for low distortion. Not had an issue with capacitance. Not particularly low-cost though.

 

[tommia]

@ audiomaker: Not pin compatible and no 4053 configuration, but great specs.