[sdiy] Matched dual NPN

[Chris CROSSKEY]

LM394 has way better matching than SSM2210.... IIIRC the 2210 is seperate 
dies, the 394 is same die and laser trimmed ..... whatever they are 
bomb-proof matched......

chrisc

----- Original Message ----- 
From: "Andrew Ison" <andrew.ison at ntlworld.com>
Cc: "Synth-Diy" <synth-diy at dropmix.xs4all.nl>
Sent: Friday, February 11, 2005 3:52 AM
Subject: Re: [sdiy] Matched dual NPN


> And just as i buy the LM394's too,i notice the self same supplier stocks 
> these SSM2210's at a slightly cheaper price!
>
> Farnell in the uk.
>
> Only now it seems i have to manipulate tiny SMD Temperature sensing 
> resistors,but of course no 3300ppm.
>
> And yet whilst i noted the standard logic of adding series resistor to do 
> something with a 3900 ppm Ik version to make it useful i could not help 
> but wonder if i were to use two parallel 3000ppm at 3k with another 3k in 
> parallel rated at 3900ppm i would have a 1k 3300ppm.
>
> Would it work?
>
> I look for details of tempco used this way but had to abandon the search.
>
>
>
>
>> http://www.analog.com/en/prod/0%2C2877%2CSSM2210%2C00.html#price
>
>
>