Sir, I have the interest to purchase this AD8302 Arduino board ( EVAL_AD8302-ARDZ) but according to our project,we want to swap all the frequency in 200 microseconds, will this system work for it?
And will this system give us the digital data?
please give more details about this evaluation board software. thank you
I just want to clarify if you want to change the frequency every 200us or swap all the frequencies, say n number of frequencies, within 200us?
The EVAL-AD8302-ARDZ shield uses the ADC channel 0 (A0) and channel 1 (A1) of the board (e.g. Arduino Uno, ADICUP3029, or Linduino One) it will be mounted to to read the ADC codes of the magnitude and phase difference, respectively. To know whether you can still measure the magnitude and phase difference accurately given your project specifications, please check the sampling rate or conversion time of the ADC of the board you will use.
The ADC of the ADICUP3029 is a 12-bit, 1.8MSPS SAR ADC, which means it needs at least 0.56us per sample. So if you will be using the ADICUP3029 board, it would still be possible to read the right magnitude and phase difference even if you change the frequency every 200us, just make sure to synchronize the frequency change and ADC read properly. However, the output of the EVAL-AD8302-ARDZ would still be in ADC codes, so you still need to do some conversions based on the chosen ADC reference voltage and resolution.
The evaluation software that comes with the EVAL-AD8302-ARDZ shield does all of these conversions as well as computations for the calibration, but it is only for basic reading and does not support the specification you want for your project. Also, the software is only compatible for the ADICUP3029 board.
Lastly, just to clarify, the development/source codes to run the shield on the ADICUP3029 are currently not available on the wiki page because they are still the pre-release version, but I can send them to you through email if you need them.
(1) 10 different frequency swap in 200us.( RF is around 200 MHz)
(2) please send source codes on this email id email@example.com
(3) can I use DC1945A(LTC2185) ADC board to acquire the output of AD8302 board?
Actually you can use any ADC as long as the ADC can sample fast enough given your project specifications / requirements. Just make sure to properly connect the pins of your ADC board (e.g. channels pins, reference voltage) to their corresponding pins in the AD8302 shield. Use the schematic of the AD8302 shield on the wiki page to help you make the proper pin connections.
Also, please expect the source codes today, but do note that these source codes were specifically developed to run on the ADICUP3029 board only. However, you can still use these codes as a guide on which pins of the AD8302 shield you need to configure and connect, as well as how to get the results from the ADC. The guide on how to run the source codes can be found on the wiki page.
Hope this helps. Thanks.
how to increase analog input range of DC1945A because in the datasheet of DC1945A give analog input range from 62mV to 125mv and AD8302 output voltage range is 0v to 1.8V.
The input range of the DC1945 is 62mV to 125mV because of the gain of the LTC6409. If you reduce the gain of that amplifier by changing the feedback resistors you can get a higher input range. The input range of the ADC itself is 2Vpp or 1Vpp depending on the voltage on the sense pin.
sir, I have already purchased the DC890B board and I want to acquire the voltage of AD8302 which is 0v to 1.8V so please suggested any ADC board with compatible or supportable to DC890B. please suggested anyone ADC board which supports the analog input range from 0v to 1.8V.thank you
If you are measuring a DC signal then you probably want to use a SAR, not a pipeline part. Try the LTC2378-20 on the DC1925A-A to see if that will work better for you.