Forum Post: RE: ADS1256: Setting up the SPI Logic Analyzer for ADS1256
Hi Khoi, Thanks for the logic analyzer screenshot as well! You should only need to call RDATAC once before you begin looping (and reading out data). After your loop you can call SDATAC. Also, why is...
View ArticleForum Post: RE: ADS1256: Setting up the SPI Logic Analyzer for ADS1256
Hi Chris, so architecture wise, I could call RDATAC before the loop, and inside the loop I will call ADS1256 _read(spi) function to store the data to the variable. Maybe if this works in side the loop,...
View ArticleForum Post: RE: ADS114S06B: Should we use common or separate Ground for...
Hi Rushit, There are a number of reasons to use split ground planes and many reasons why you shouldn't. One of the biggest reasons for splitting in the past has been related to power. Large power...
View ArticleForum Post: RE: ADS1262: PCB Layout verification to ensure lowest possible...
Hi Andrew, Welcome to the TI E2E Forums! Overall the layout looks pretty good. I just have a few comments: DGND could have a shorter connection to GND here...I don't see a need to elongate this...
View ArticleForum Post: RE: ADS1248: SPI communication in continously conversion mode for...
Hi FloW, The 47 Ohm resistors on the digital lines slow the clock edges to help reduce noise. This has no effect on DRDY. I'm not sure I'm following the SDI and the 1Meg resistor. That shouldn't make...
View ArticleForum Post: RE: ADS1262: PCB Layout verification to ensure lowest possible...
Chris, Thanks for the quick feedback. We will actually be communicating with multiple of these "detector boards", so on the main board, we added the series resistor on the clock line there since it...
View ArticleForum Post: RE: ADS1018: ADS1018
Siddharth, The digital voltage levels are described in the electrical characteristics table. Threshold levels scale with the supply voltages. Here's a clip of the specified values on page 7 of the...
View ArticleForum Post: RE: LMP90098: Variations in RTD data
Sumangala, I'm glad that you were able to debug the noise problem with the board. Working with RTDs requires a lot of attention to detail to get precision measurements. With Kelvin connections (we also...
View ArticleForum Post: ADS1293EVM: ADS1293EVM Board files
Part Number: ADS1293EVM I see that others have requested the Altium files for this board. if they are available could i also get this. thanks
View ArticleForum Post: RE: ADS1018: unused input channel
Carl, There isn't a big issue tying an unused input to ground. The original motivation for giving this guidance was that there may be a modest rise in the ADC input leakage current (with the used...
View ArticleForum Post: RE: ADS1256: Setting up the SPI Logic Analyzer for ADS1256
Hi Khoi, Generally you want DIN to be "0x00" (i.e. NOP) so that the ADC only returns data. If DIN forms a command during data read you might interrupt the data read operation and get invalid data. When...
View ArticleForum Post: ADS1293: Switching RLD on increases system noise
Part Number: ADS1293 Hi all, I was performing a test according to standard 60601-2-47 chapter "201.12.4.4.106 System noise". I am using two inputs in my setup. When I don't enable RLD, I get ~10uVp-p...
View ArticleForum Post: RE: ADS122C04EVM: ADS122C04EVM With External Microcontroller
Bob, Here is an I2C transaction with a valid device on the bus: Here is at the address programmed for the ADS122C04 (A0 = A1 = DVDD): And here is where the device seems to attempt to respond at a...
View ArticleForum Post: ADS1261EVM: AC excitation and connector J5
Part Number: ADS1261EVM I am trying to do AC excitation on this board. Am I supposed to use connector J5? Also, is the included AC excitation the logic and you have to provide the means to drive (like...
View ArticleForum Post: DAC37J84: DAC37J84: LVPECL termination for Clock and Sysref
Part Number: DAC37J84 Hi Jim and Neeraj, I checked the schematic and there is no resistor divider network other than 121ohm terminations on the clock lines. As mentioned previously R179 & R180 are...
View ArticleForum Post: RE: Powering the ADS1299EEG-PDK board without an mbb0
In reply to Tom Hendrick: Hi tom, Thanks a lot for the help! Following your suggestion, would this be the correct scheme? Do these setting also apply to ADS1299 ? Regards, João
View ArticleForum Post: RE: TLV5614: TLV5614 power on sequence
Hi Jeff, Thank you for your query. The failure could be because of the power supplies as you have pointed out. There is no explicit power supply sequencing requirement for this device as such. However,...
View ArticleForum Post: RE: DAC3482: initial configuration of the register
Hi, The use of FIFO is recommended. You may refer to the same app note for the difference between using FIFO and FIFO bypass. -Kang
View ArticleForum Post: RE: Powering the ADS1299EEG-PDK board without an mbb0
Looks good! And yes, this would also apply to the ADS1299EVM.
View ArticleForum Post: ADC08B200: Input leakage current on Vin pin when ADC operates at...
Part Number: ADC08B200 Hi team, I'd like to confirm the input leakage current on Vin pin when ADC operates at 200MHz frequency. And, I need that value with both of typical and maximum spec. Could you...
View Article