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what's the best DAC type for driver circuits? (like lcd,slm)

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wateror

wateror

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what is dac type

I found most lcd driver ICs employ the resistor-string type DAC.
Why not use other types? like capacitor array, current steering.
I think resistor-string consumes lots of chip area, so is there any idea to reduce it while still keep 8-bit resolution.
 

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