Forum Post: RE: SPI for AFE5809EVM Demodulator Registers
Hi Chuck, pt 5: For the GND connection we are using the GND on P14 which is board GND. Q1: We are using P14, but we’re doing the following instead to disable the optos: Short U16 pins 9 & 10, lift...
View ArticleForum Post: RE: LM96550
Hi: I have design a PCB for the LM96570 and LM96550 for PZT (Piezoelectric) driver. I have already make that board work which the eight channels of LM96550 can output 50v square pulses and everything...
View ArticleForum Post: RE: LM96550
Hi Yuan, I assume you following the same power up sequence whether the PZT is connected or not. The 330pF cap from the LM96550 output to ground emulated the PZT's capacitance. If you connect to the...
View ArticleForum Post: RE: LM96550
Thank you very much for your reply. I will try remove the 330pF caps. When I following the power up sequence, the PZT is not connected. I connected the PZT after the power up. Should I connect the PZT...
View ArticleForum Post: RE: LM96550
Hi Yuan, It shouldn't matter. However, to be on the safe side, I would connect the PZT before power up. Regards,Charles
View ArticleForum Post: RE: AFE5808 - strange artefacts
Hello, I will check with the customer if he can confirm on your question. In the meantime the customer informed me about the following: They measurements at the inputs of the ADCs (25MHz clock...
View ArticleForum Post: RE: AFE5808 - strange artefacts
Meir, Can you please describe the device pins at which they are measuring 25MHz or 50MHz? The alternating signal is unusual and probably not caused by this phenomenon.
View ArticleForum Post: RE: TSW1400 Firmware Source for AFE5809EVM
Hi Chang-Lin,Were you able to download the Firmware this time?
View ArticleForum Post: RE: SPI for AFE5809EVM Demodulator Registers
Hi Duncan, I know that you said you will wait for the production hardware. Did you have any luck with the EVM? Actually, this week we did see some funny behavior from the DEMOD readback on the EVM....
View ArticleForum Post: RE: TSW1400 Firmware Source for AFE5809EVM
Dear Chuck Smyth, I have downloaded the firmware source code from the link. Thank you very much. Chang-Lin
View ArticleForum Post: RE: AFE5808 - strange artefacts
Hello Again, Thanks for your answer. The customer measured 50Mhz at input of the ADC after switching the ADC on. Switching off the ADC or switching off the clock removed the problem completely. There...
View ArticleForum Post: RE: SPI for AFE5809EVM Demodulator Registers
Hi Chuck, We have not tried SPI access to the EVM again since my last email. The EVM board is now removed from our development board so will not be easy to try again. Thanks, Duncan
View ArticleForum Post: RE: AFE5808 - strange artefacts
Hi Meir, I am increasingly convinced of your hypothesis that it might be analog. I need a few more pieces of information, though: I want to verify that the issue is indeed an analog issue and not a...
View ArticleForum Post: RE: AFE5809EVM
Hi Chuck, I am trying to use 1405 with AFE5809 . I assume * .ini file is missing in the high speed data convertor app under 1405 detail directory. Can you help me to connect to AFE5809 using TSW1405....
View ArticleForum Post: RE: AFE5809EVM
Reza, We will send ini through email, but beware that the TSW1405 will only support 12b resolution, and not 14b resolution. Thanks,
View ArticleForum Post: RE: AFE5808 - strange artefacts
Hello, I hereby send you the answers on the questions you have asked. The customer suspect that the artifact is created between the LNA and the PGA. The measurements on the power supplies, are very...
View ArticleForum Post: Regarding starting the product development on AFE4490
Hello Everyone, Can I please get to know about step by step procedure to follow, while implementing the Product based on AFE4490 , so that debugging will be easier ? Actually the PCB board is being...
View ArticleForum Post: RE: Regarding starting the product development on AFE4490
Harini, You can post all questions on this device as you have in the medical forum. I believe we are addressing your questions in this post. e2e.ti.com/.../1619280
View ArticleForum Post: RE: AFE5808 - strange artefacts
1.2 Increasing the gain in LNA 18dB to 24 dB adds more external noise to the signal (modulates it) / digital gain from 1 to 6dB increases signal / changing VCA attenuator does not change amplitude Do...
View ArticleForum Post: RE: Regarding starting the product development on AFE4490
Hello, Actually I am implementing the Heart Rate & SpO2 Measurement using AFE4490 with ATMEGA8A Microcontroller . Actually I am sending the Processed Data via TXD & RXD . I am not getting how...
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