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Question for replace to AD5724

Question asked by Kaos on Oct 21, 2016
Latest reply on Nov 2, 2016 by msamera

Dear Sir/Madam,

The customer is compareing the performance of DAC8420 with AD5724 for replacement.

AD5724 has worse some performance than DAC8420, correct?

Setting of DAC8420
VDD=+15V, VSS=-15V, VVREFHI=+10V, VVREFLO=-10V
1LSB=(+10-(-10)=20V/4096(12bit))
Full-Scale Error(FSE) = +/-2LSB = +/-9.76mV
Full-Scale Temperature Coefficient(TCFSE) = +/-4ppm/C = +/-0.08mV/C

 

So if we use VVREFLO=0V,1LSB=10V/4096.
Does your error-voltage reduce to half, correct?
Full-Scale Error(FSE) = +/-2LSB = +/-4.88mV
Full-Scale Temperature Coefficient(TCFSE) = +/-4ppm/C = +/-0.04mV/C

By this way, your AD5724 seems worse a little bit(0.04mV), correct?
Gain Error3 = -0.065%FSR = -6.5mV
Gain Error TC3 = +/-8ppm/C = +/-0.08mV/C

 

Thanks Kaos

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