Speed of SDAC24 in RA2A1

Question

I am using the SDAC24 in a FreeRtos timer callback every 10 ms. 
 The SDAC24 is configured in single ended mode, and only 1 channel enabled. 
 When I check the datasheet (section 47.5), it mentions that sampling is possible up to 15625 Hz. 
 This makes sense, clock is 4 Mhz, 256 oversample ratio, so 4Mhz/256 = 15625 Hz. 
 
 But in my timer setup, one single conversion takes 1 ms (not 0.06 ms) ! That is quite a bit more. 
 
 I have created a simple example project that I used with the EK-RA2A1 devkit. 
 I borrow the LED output pin (p205), to toggle before and after conversion, and I see 1 ms on the scope:

I can share my example code that runs on the EK-RA2A1.

Questions:

* Is it possible to get a quicker conversion with the SDADC24 ? 
 * Or is there some other limitation that would limit the conversion time to 1 ms in single-ended, single-scan setup? 
 
 Thank you

PV_Renesas · Answer

HI, Yes I was able to download it. Some suggestions: 
 
 Switch to Continues Scan mode if possible 
 Replace the polling loop with Interrupt Callback 
 
 Also, using ELC with a periodic timer would also increase the performance of the SDADC. Please let us know the outcome if you test any of the mentioned approaches. Thank you, Panos