Help for ladder type DAC..

[Vabzter]

Hi all,
I am designing a 10 bit resistive ladder type DAC. It has 2 resistive ladders, one for MSB and other for LSB. To have a good matching I have constructed the MSB ladder in terms of LSB unit resistor i.e 1 Lsb unit resitor = 234 Ω and 1 msb resitor is 32 * 234 = 7.5KΩ
Has anyone designed such a resistive ladder? I have doubts regarding the DNL and the resistive mismatch..
Thanks,
Vabzter

 

[aProgrammer]

I don't think you get good result with this way,

I suggest you to try R2R ladder

https://en.wikipedia.org/wiki/Resistor_Ladder