Guys, I've read over your posts and datasheets and think I understand (I guess you can be the judge here). It seems I have two options.
1) I can output a square-wave signal from my MCU which is 3.3V max between 30 and 35 kHz (range specified by the sensor's datasheet). My MCU clock is 8 MHz, so I could create a signal at FOSC/264 and clamp it to 3.3V (need to research this - would a voltage divider be OK?).
2) I can try and use the SG3030 to provide the clock into the sensor. I think I understand the discussion here, but probably not. According to the datasheet, the clock in is for the AD conversion in the sensor - not for the SPI communication clock (which is specified as 500 kHz). I am writing to a SD card (to log data) and the SPI bus will be clocked at 500 kHz (this is working on my test system). So, if I did use the SG3030, I could tie Vdd to 3.3V, Vss to common ground and use the OUT as the clock source to the sensor. The supply voltage of the "next" sensor is 3.3V (the pressure sensor) from the way Millwood explains. From the way I read it, Vdd could be 5V and Vio 3.3V and the OUT would be 3.3V 32 kHz signal (I think). From the datasheet it seems the Vio is optional. So option 2a) Vdd to SG3030 5V, Vio tied to 3.3V or 2b) Vdd 3.3V and Vio not used.
If I breadboard options 2a and 2b, I can observe the signals with an oscilloscope. I suppose I can't damage the chip doing this... Thanks for the discussion!