You said 35/sec ... So 35 updates per sec or 1 update every 35 seconds?
35 updates per second is about 28 milliseconds so that doesn't seem too bad.
According to the specs, the input filter delay on that card is 50ms, or 20Hz. Sounds like you are doing a bit better than that.
If you need speed, you will have to buy an AAD04B2 module. It runs at 500Hz.
Ok so you mean 35 seconds not 35/sec. That doesn't seem right.
Sounds like a wiring issue if it it preforming like that. Are the grounds of the robot and the analog signal source linked together?
That sounds a lot like a large capacitance on the line somewhere. I would suggest putting a high-impedance meter directly on the input contacts of the analog card (not at a distance along the input line), and monitor the voltage change there. Or plug a reference test voltage directly into the analog input card with a short, clean pair of wires.
If the analog card response is still laggard even with the input line eliminated, the card may be suspect.
