After installing the Brother scanner driver (brscan4-0.4.10-1.amd64.deb) for an MFC-J690DW, I could use the scanner with Simple Scan (Document Scanner) in single page mode but not with the ADF (Automatic Document Feeder).
I was able to fix this by running the following command in sudo mode (your IP address may be different):
brsaneconfig4 -a name=MFC-J690DW ip=192.168.2.10
After that, when I run the "brsaneconfig4 -q" command, I see the following:
scanimage -L
device `brother4:net1;dev0' is a Brother *MFC-J690DW
device `escl:http://192.168.2.10:80' is a ESCL Brother MFC-J690DW flatbed scanner
Previously, I would only see the second line. In Document Scanner, when I select the "Brother *MFC-J690DW" instead of the "ESCL Brother MFC-J690DW" I can use the ADF.
Just thought this might help other users since I could not find this information on-line.