The AD9714/AD9715/AD9716/AD9717 are pin-compatible, dual, 8-/10-/12-/14-bit, low power digital-to-analog converters (DACs) that provide a sample rate of...
AD9715 on Analog.com
Is it mandatory to write the 32 coefficients to device for the calibration to take effect?
No. Only if you wish to tweak the coefficients yourself.