05-30-2008 04:08 AM
hi, i am trying to interface the onboard Amplifier and ADC. i am getting correct output for amplifier by reading AMP_DO signal(whatever the gain i am setting i am getting it on AMP_DO). but there is no response from ADC. ADC's digital outputs is always high for all input analog voltages . i know dont what is the problem. please help...i am entirly new for this.also trying this for longtime.
09-24-2009 06:21 AM
06-01-2010 05:02 AM
S3-E Starter kit is using LTC 6912-1 amplifier. The LTC6912-1 provides two independent inverting amplifiers with programmable gain. The purpose of the amplifier is to scale the incoming voltage on VINA or VINB so that it maximizes the conversion range of the DAC, namely 1.65 ± 1.25V. For programmable gain settings please sea table 10-2 in ug230.pdf. The gain required to set as per voltage range of VINA or VINB. For more details please refer chapter-10 of ug230.pdf.
If it is not clear please use our Worldwide Technical Support
Open Web Case
http://www.xilinx.com/support/clearexpress/websupport.htm. So that one of our engineer approach you.
With best Regards
07-27-2010 06:25 AM
hi, may i know that have you found the solutuion of the ADC that show all output with high state, now i facing this problem also, if you able solve it can you please tell me how and why?
08-15-2010 04:35 PM
A bit off-topic question:
do You configure programmable gain amplifier once on startup(which is quite difficult I suppose?) or send configuration data constantly after power up?
12-16-2010 07:44 PM - edited 12-16-2010 11:31 PM
How do you know your problem is the same? Are you using the same ADC and amplifier?
- Bob Elkind
02-07-2011 07:28 PM
I am also using the same adc and the same programmable pre amplifier on the boar. Kindly help me with the problem