Olin Lathrop wrote:
> Michael Watterson wrote:
>   
>> Agreed, but such a resistor array is better than separate resistors.
>>
>> I would not hazard though as to how much better.
>>     
>
> I would, after READING THE DATASHEET of course.
>   
you might not. Even though you are expert and can read Datasheets
> It's amazing the amount of pointless speculation this question has
> generated.  Look it up already!
>
>   
There are loads of different datasheets and parts. Some don't quote any 
tolerance other than overall, not differential. Precision arrays may 
quote differential tolerance

I worked in a place as QA eng. that designed and made thickfilm 
components and Hybrid circuits. Untrimmed parts may  have  worse  
tolerance  but  match each other better.  Tighter tolerance trimmed 
parts may have similar resistor to resistor tolerance as the quoted 
tolerance.

Many cheap SIL/DIL resistor networks (untrimmed) will only quote 
absolute tolerance, not differential. At least this was true last time I 
looked.

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