Hello Vishnu, I still find it strange that channels 2 and 3 are almost identical but you are only able to get a clean signal on channel 2. I don't think the resistance should affect it since the resistance is the same for both channels. Do you have multiple board assemblies that exhibit this behavior? I'd like to rule out assembly issues. Brian
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Forum Post: RE: Starterware/ADS1298: 12 lead derivation for ADS1298
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Forum Post: RE: ADS5270: ADS5270: VCM does not start up correctly
If the system powers up with the amp driving a little different VCM such as 1.65V instead of the 1.45V, that should be no problem. with the analog input signal being outside the desired range of common mode voltage the performance specs of the ADC would not be guaranteed but since the ADC s not yet powered up anyway then this would not be a concern. The analog input pins might be violating the absolute max specifications in the datasheet since there is a signal present on the input pins before the power is applied to the ADC, and the ESD protection diodes in the ADC might be turned on, but if the amp is not able to source a nearly unlimited amount of current into the ADC input pins then a short period of the amp powering up before the ADC should not shorten the life of the ADC appreciably. If the ADC has its power supplies present but the ADC is in an internal 'powerdown' state, then even the abs max limits would not be violated if the amp were up and running and sourcing its output at a VCM of about 1.65V. I will ask the design team for this device if there is any reason why the VCM output should be doing what you are seeing. It is beginning to sound like there are some faulty devices and we may ask for some of them to be returned for failure analysis. possibly the devices have been damaged. I will check with the design team. You are providing a reset pulse to the ADC, correct? May I ask what you are programming into the SPI configuration registers? Regards, Richard P.
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Forum Post: RE: ADS1298 with single lead ECG
Thank you Brian.
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Forum Post: RE: PCM4222: Timing Information for Input Data Sampling
Hi, Kato-san, I just received the EVM and performed some tests. It seems that DSD clock operation starts after the internal reset process is complete. I will try to perform further testing and will get back to you in the next couple of days. Best Regards, -Diego Meléndez López Audio Applications Engineer
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Forum Post: RE: PCM1862: [ PCM1862-Q1 ] TDM Configuration with three PCM1862-Q1
Hi, Kenichiro, Thanks for the feedback, yes, the control protocol (like I²C and SPI) can change depending on the system and IC used. Best Regards, -Diego Meléndez López Audio Applications Engineer
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Forum Post: RE: PCM1865: PCM1865 noise problem
Hi, Pascal, VREF pin is used as the decoupling point for the internally regulated ADC reference power supply. The inputs of the ADC are referenced to 0.5×AVDD. We usually recommend to connect the decoupling capacitor as close as possible to this pin to avoid noise coupling issues. If the decoupling capacitor is located in the bottom of the board, the decoupling effect would be mitigated. When the inputs are connected to VREF, the noise disappears because the reference is VREF. I reviewed the schematic and it seems there are not DC blocking capacitors connected to the MIC inputs. We recommend to use DC blocking capacitors to ensure that the DC bias conditions are known so the device can operate as expected. Other than this, I have no other comment. Best Regards, -Diego Meléndez López Audio Applications Engineer
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Forum Post: RE: Storing digitized video to SD Card
Hi Max, this is a broad question, so no sure how could really help you. Do you have any TI chip in mind for your design?. As a general answer, if compression is the key factor, I would suggest to use HEVC codec or H.264 HP. thank you, Paula
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Forum Post: RE: PCM4222: Timing Information for Input Data Sampling
Hi Diego-san, Thank you for your special support. I am looking forward to getting the information from you. Best regards, Kato
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Forum Post: RE: ADC161S626: interface with differential inputs
Hi Cay, I am not very familiar with the LMP91000 (another group supports it) and so I am not sure what the internal circuit is connected to C1. If you post to the precision amplifier forum they may be able to answer that question. You could try connecting it as you mention and see if it is giving you accurate numbers for the current through the feedback resistor. Another option would be to connect one of the current sense devices that TI makes (see this page: ) to to the pins and then connect that output to the ADC. Mike
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Forum Post: RE: PCM1865: PCM1865 noise problem
Diego, thanks for the explanation. Blocking capacitors are on the first page of the schematic (10uF). I’ll run some experiments around the VREF pin and let you know the result. Thanks Pascal
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Forum Post: RE: ADS7042: Select a higher speed ADC
The stimuli source frequency is 10 MHz which is arbitrary thus the input signal is 10 MHz which is required signal and lower signal will be filtered as noise.
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Forum Post: RE: TLV320ADC3101: AMIC configuration / Setting for ADC - TLV320ADC3101
Thank you . will try this. Thanks & Regards, Supritha
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Forum Post: RE: TLV320AIC3262: Does the PurePathStudio work with Windows10?
Hi Luis, Thank you for your answer. Best regards, Takishin
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Forum Post: RE: ADS8568: ADS8568 - VHDL or Verilog
This has been supported and communicated by e-mail. Thanks. Best regards Dale
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Forum Post: RE: ADS8684: Having a High fail rate! Could use some advice...
Hi Kaden, Sorry for late response, we have many customers using this device and we didn't hear and didn't get any feedback for the failure. We need more information about the issue you are meeting, I will contact you by the email address listed in your my.ti profile. Thanks. Best regards Dale
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Forum Post: ADS52J90EVM: About ADS52J90 GUI
Part Number: ADS52J90EVM Hi team, My customer is considering evaluating with the following configuration. ADS52J90EVM + Aria10EVM(DK-DEV-10AX115S-A) First of all,he intends to confirm that Aria10EVM and ADS52J90EVM are communicated correctly by JESD204B. Therefor he wants to evaluate by using the Ramp Test Pattern outputted from ADS52J90EVM . Please let me ask you a question. In the above case,if only HMC-DAQ is installed, will ADS52J90EVM be able to output the Ramp Test Pattern? Best regards. Tsuyoshi Tokumoto
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Forum Post: RE: TLV320AIC3268EVM-U: PurePath™ Console GUI for TLV320AIC3268EVM-U
Luis-san, I found PPC2 at the same location. Sorry that I missed it. Thank you so much for your answer. Best Regards, Akihisa Tamazaki
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Forum Post: TLV320ADC3101 Driver support for TDA2EX?
Hi Guys, We are having custom TDA2EX board, on board we are having TLV320ADC3101 , but while going though kernel i was not able to find any driver. Background: TDA2EX Custom board, SDK -> VISION_SDK_02_11_00 KERNEL -> 3.14 (glsdk_07_00_04_03) UBOOT -> 2014 Upon some search came across: regards, Ganesh
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Forum Post: RE: ADS5463 Minimum Sample Rate
Answer Thank you very much. Do not you think that the ADC12D500RF product does not have a PLL circuit like the ADS5463R? If you do not have it, it will work at clock frequency of 1Msps ~ 10Msps. Is that correct? You do not need to guarantee perfect operation.
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Forum Post: RE: ADS1278: Differential Input Signal Interface Polarity (Figure 89 on the datasheet)
Hi Ryan, Thank you for the explanation. Best Regards, Cagatay Kalelioglu
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