I don't need multitouch or position - just on/off on a 3'X3' glass surface (i.e. is someone touching the glass, yes or no).
Uh-oh ... I've been thinking in terms of communication where signal quality is critical. It might not be so critical here - depends on the receiver's photo detector/preamp circuit. 
Referring to the receiver's application circuit and if I didn't have an oscilloscope, I would just try connecting a 10K resistor from pin 1 (OUT) to +Vs (see diagram on page 1).