Hi,
I have bought a wideband controller at
www.breitband-lambda.de
This is German guy has developed this controller. I have bought one of these controllers in order to replace the original narrowband sensor on my 1990s VW Polo by a wideband sensor.
In the Polo together with the VW digijet-ECU it works fine.
The controller has also a 0-5V wideband output, so you can use it for the closed loop. In the fast mode measurement value is updated every 98 ms, so 10 Hz. This must be fast enough for the DTA.
These controllers start from 70 Euro, Bosch LSU4.2 70 Euro, LSU 4.9 90 Euro, as far as I remember.
Just have a look at the homepage. It could be switched to Englisch, German is not so common...!
I have planned to use this controller also on the S60, but I still need some time for my project.....
cheers
Stefan