About TUE of DAC7750 and DAC8750

Nat,

The two devices use more or less identical signal chain components in order to create the voltage and current outputs - therefore parameters like offset error and gain error remain the same for both devices. Linearity specifications change slightly because a 12-bit device has a larger LSB than a 16-bit device and linearity is specified in LSBs, but the DAC topology used in both designs is also very similar except that one is modified to be a 12-bit DAC instead of 16-bits. So in terms of accuracy and error, the 12-bit and 16-bit parts have the same specification as long as quantization error is not included.

A higher resolution device has lower quantization error than a low resolution device. So if quantization is included in the error calcuation then the 16-bit device has better accuracy. Generally speaking quantizaiton error is not included in DAC error calcuations as resolution requirements are usually presented separately from accuracy requirements.