I can't seem to seem to find a value showing what the noise current in the IDAC output is? Where can I find this value? Are there any known techniques to reduce the noise output?
Are you facing any particular issue in your design ? Regarding IDAC output accuracy, you can check the CSD block parameters in the device datasheet. The IDACs are mainly used for the capsense block - so the parameters are listed there. The INL and DNL of the IDACs can be seen there.