Forum Post: RE: ADS124S06: About REFCOM pin connection in bipolar supply case
Also AVSS-SW pin is connected to GND .
View ArticleForum Post: RE: ADS124S06: About REFCOM pin connection in bipolar supply case
Hi Umut Kilci, The design of the internal reference is based on a connection to AVSS and if connected to some other point (such as DGND using bipolar supplies) the REFOUT could oscillate and not be...
View ArticleForum Post: RE: ADS1261: 2 wire excitation mode problem
Hi Elia Pellegrino, Thanks for the update -Bryan
View ArticleForum Post: RE: ADC3422: test PRBS generated on LVDS outputs
Hi Chase, maybe I found a problem in the structure of variable delay lines in the FPGA inputs, which could lead to data corruption and partial interference across separate lanes. I have to perform...
View ArticleForum Post: RE: ADS124S06: About REFCOM pin connection in bipolar supply case
Hi Brian, Thanks for the prompt reply. Actually, two switching regulators are used to generate AVCC (2.5 V) and AVSS (–2.5 V). When I removed the AVSS connection to the ADC, the output voltage error...
View ArticleForum Post: RE: ADS6445: Serial interface acknowledge signal
Hi Malkangouda, SPI is not the same as I2C, there is no acknowledgement. SPI signaling standards can vary from part to part and vendor to vendor, as there is no standard. The SPI interface timing and...
View ArticleForum Post: RE: ADS124S06: About REFCOM pin connection in bipolar supply case
Hi Umut Kilci, Thanks for the additional info. Yes this is why both pins (REFCOM and AVSS-SW) are required to be tied to AVSS in the datasheet -Bryan
View ArticleForum Post: RE: DAC38RF93: SYSREF capture
Hello Miguel, Yes, the SYSREF is captured on the rising edge of DACCLK, regardless of the on-chip PLL mode or external clock mode. -Kang
View ArticleForum Post: RE: ADS1015-Q1: I2C Write failure problem
Hi Alan, Can you ask the customer to share logic captures of the transactions over I2C so I can verify they are sending and receiving data in the correct format? Regards, Joel
View ArticleForum Post: ADC12QJ1600EVM: Data capture problems using TSW14J59EVM
Part Number: ADC12QJ1600EVM Other Parts Discussed in Thread: TSW14J59EVM , , TSW14J57EVM Tool/software: Hello, we recently aquire two ADC Evaluations boards, ADC12QJ1600EVM and ADC12QJ3200EVM,...
View ArticleForum Post: RE: ADS7054: Common-mode question
Hi John, You might still get an accurate value for a single sample, but it will be degraded in terms of noise and linearity especially over multiple samples of a dynamic input signal. In short, you...
View ArticleForum Post: RE: ADS7038-Q1: ADS7038
Hi Pascal, You are correct that the 1ppm/ °C drift will not apply uniformly throughout the entire temperature range on a typical device. Drift might be worse or better in a given temperature range,...
View ArticleForum Post: RE: DAC80516EVM: I2C protocol not reaching
Hi Jean, The device has a Reset pin, but on the EVM this should be pulled high. Out of curiosity, could you try communicating with the device through the EVM GUI? It would be good to confirm that the...
View ArticleForum Post: RE: DAC81401: Voltage sense - use of VSENSEN input
Hi Ian, I understand your point here. I will check with the team and get back to you in next couple of days. In the meantime, please do send the block diagram. Thanks, Sanjay
View ArticleForum Post: RE: ADS131M02: AC-coupled input help for ADS131M02
Hi YC, Thanks for sharing the information. ADS131M02 can measure a differential input signal up to -1.2V~1.2V, and also it can operate up to 64ksps data rate, so there is no issue for you to use this...
View ArticleForum Post: RE: ADS1298R: ADS1298 - No ECG signal when electrodes are placed...
Hello Tran, In order to support this request, we will need more detailed information about your system and the troubleshooting steps you have taken so far. Please review some of the common questions...
View ArticleForum Post: RE: ADS1292R: ADS1292R Data retrieval issues
Hi Anakshi, The RLD is required to establish a known common-mode voltage for the input signals from the body/simulator. This is needed to ensure the PGA in front of each ADC channel is operating...
View ArticleForum Post: RE: ADS131M04: READ AND WRITE ISSUE
Hi srinath B, Your read command is incorrect. You are sending ' 001a aaaa annn nnnn' to the ADC, the correct RREG command is ' 1 01a aaaa annn nnnn'. If you want to read the GAIN register (04h...
View Article