• Resolved

THS3217: High Linearity DAC driver

Part Number: THS3217


I have a 275MSPS high speed DAC (DAC5672).

usually the DAC driver is a difference amplifier with two Rt resistors at the output current of the DAC as shown below:

I want to maximize the CMRR and Linearity.

if I want to maximize the CMRR, I should minimize the miss-match between the resistors in the difference amplifier. I have found some resistor networks like below:

but the size is as shown below:

another option is THS3217, there are two unity gain buffers at the input:

now the advantage is use of two 49.9 Ohm resistors as Rt, (I don't need the Power Amp)

my signal should be 2Vpp and the HD2 should be better than 90dB.

now which option do you recommend me?

Best Regards