Forum Post: RE: Can't get ADS1248 source current use EVM.
Hi, Bob,Thank you for replying. I did test as you suggested, but still not work.
View ArticleForum Post: Noise issue in a voltage measurement APP with the ADS1247
Hi buddies,I'm using ADS1247 in a voltage measurement, MCU is STM32F103. I found a problem that sometimes the noise is huge(only about 12 bit valid data) after the system power up, and sometimes the...
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Forum Post: RE: How to test ADC’s CMRR and PSRR?
Hi, Bob,Thank you very much. The reason why I can not use DC common voltage to test CMRR is ADS1248' offset voltgage is not constant, right?I use a AC common voltage, 2Hz, 1.2V to see the FTT analysis,...
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Forum Post: AIC3254 open DIN/WCLK/BCLK
Dear Sir,We had tested the AIC3254 EVM by SRS function as below pfw.If we open DIN/WCLK/BCLK in EVM, the codec will show as below.“Error: MiniDSP failed to change adaptive buffer, pending bit remains...
View ArticleForum Post: LMP90100 oscillating read-outs with high ambient temperature
We have a board with the LMP90100 where the readout oscillates between +-500mV about the correct value when the ambient temperature is above 40 °C. This test was made inside a temperature chamber....
View ArticleForum Post: RE: ADS7263 - Clock Signal
Hi Kawai,The burst clock would be fine, but the RD input needs to see the falling SCLK edge while it is in the high state. Your diagram shows it as (essentially) high for the same period of time that...
View ArticleForum Post: RE: vga output from am335x interfaced with 8200
To be honest there are a million things that could be wrong.What you need to do is try to debug each section of the video path rather than the entire thing all at once.I suggest first checking that the...
View ArticleForum Post: RE: ADS1148 DRDY and SPI ADC data issue
Hi Vishal,One thing to keep in mind when using the ADS1148 is that there is a common mode input range restriction. You cannot use a single supply voltage for the analog supply and then connect any of...
View ArticleForum Post: RE: Can't get ADS1248 source current use EVM.
Hi Nicole,I verified the operation on my ADS1248EVM before I responded previously. This means that there is either a setup issue, or an issue with the EVM itself.Can you send me a picture of the EVM...
View ArticleForum Post: RE: How to test ADC’s CMRR and PSRR?
Hi Nicole,You can use the DC test as the numbers given in the datasheet Electrical Characteristics table are for DC at a gain of 1 and also at a gain of 32. However you must also consider the noise...
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Forum Post: RE: ADS8881 maximum SCLK
Hello Craig,The current datasheet states that both edges could be used to read out data, and as you mention, it doesn’t apply for fast SCLK frequencies due to data delays. However, it does apply for...
View ArticleForum Post: RE: TLV320AD3101 GUI issue
Started with the board again. But things arestill not working as supposed to. The Eq can now be set and downloaded. But it does not affect the sound at all…If I try the Eq with the digital mics,...
View ArticleForum Post: RE: PCM5102EVM-U Rev A
Don,I replaced the board and that fixed it. The first was DOA.Thanks,Gavin
View ArticleForum Post: RE: On Reference/Bias electrode of ADS1299 EEG-FE
Hi Xinling,Thanks for your questions. While we are not experts in EEG, I think I can provide some guidance here:Typically, your frontal electrodes would both be referenced with respect to a common...
View ArticleForum Post: SRC4392 - what happens to digital overs?
I've built a straight-forward prototype src, using the 4392 to interface audio at sample rates of up to 192KHz, to digital audio Peak Program Meters that operate at a maximum Fs of 96KHz. All seems...
View ArticleForum Post: ADC14C080 / Output sate at power down mode
Hi,Please let me know about output state of ADC14C080 at power down mode. I'd like to know if it will be Hi-Z or Low state at power down mode. I checked the datasheet and understand that the internal...
View ArticleForum Post: TLV320AIC3256 Oversampling and decimation calculations
Hi TI,I'm using the TLV320AIC3256 in a design that's connected to two digital microphones multiplexed onto the same input line. My microphone specifications say that I can clock them between 1 and...
View ArticleForum Post: RE: SRC4392 - what happens to digital overs?
I should clarify that the SRC is set up to lock to anything, and output 96KHz; so the PPM meter (from RTW) is always seeing 96KHz at it's input.PhillipSterling Sound, NYC
View ArticleForum Post: PCM9211 XMCKO
HelloMy customer is trying to get XMCKO from MPIO_A2 terminal in the EVM,but he can not get XMCK.Would you please let us know the minimum number of register setting to get XMCKO?ex79h GIOA2DIR...
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