Forum Post: RE: TSW54J60EVM: TSW54J60EVM
Emre, 1. This board has two amplifiers feeding the ADC, which has two analog input channels. It was not designed for threshold or edge detection. You can maybe use the over range indicator which has...
View ArticleForum Post: RE: CCS/AFE4900EVM: AFE4900 initial
Thank you, It's OK. But when I call AFE4900 _Reg_Read( 0x2D ), It is not ECG signal with registrer {0x4E, 0x24E00C}.
View ArticleForum Post: RE: ADS1256: ADS1256 and TM4C129 SSI communication issue
Hi Mustahsin, I have a couple of suggestions to try: I would recommend using 8-bit SPI frame (instead of 16-bit frames as you are currently using). The reset command is only 8-bits and not all other...
View ArticleForum Post: RE: ADS1261: Input protect
Hi Kai, The red point is the input voltage to the customer's system. The first resistor and TVS diode are optional, but in general I would recommend trying to shunt any overvoltage or EMI signal to...
View ArticleForum Post: RE: ADS1255: SPI clock SCLK duty spec
Hi Uchikoshi-san, I do not know why we do not have a clock duty cycle specification in the ADS1255 datasheet. I would recommend going by the duty cycle specification given in the ADS1257 datasheet as a...
View ArticleForum Post: RE: ADS1255: SPI clock SCLK duty spec
Hi Chris, Thank you for your answer. The spec you were referring to is one for fCLKIN which is the master clock for ADC. We are asking about SPI clock duty. In general, I think that a master clock...
View ArticleForum Post: RE: ADS1255: SPI clock SCLK duty spec
Hi Uchikoshi-san, Yes I was referring to fCLK, I'm sorry I misunderstood. I believe you are correct, if you meet the minimum setup and hold times of the SCLK then it shouldn't be an issue since...
View ArticleForum Post: DDC112: What is manufacture valiation of output data when 22pF...
Part Number: DDC112 Hello guys, One of my customers is manufacturing some products which DDC112 is used for a photo diode (PD) current sensing. In the manufacturing, they found that some of DDC112...
View ArticleForum Post: RE: Linux/ADS54J20EVM: API for FT245R SPI bus stimulation
Shlomi, We do not have any Linux API we can offer. The ADS54J20EVM has no way to bring in an external interface for the SPI signals. You will have to use the FTDI device as is. On the DAC EVM, there...
View ArticleForum Post: RE: DDC112: What is manufacture valiation of output data when...
Hi Chen, Thank you for your reply. It's nice to talk with you on this E2E. I see. I'm looking forward to receiving your next reply. Thank you again and best regards, Kazuya Nakai.
View ArticleForum Post: ADS124S06: ADS124S06 RDATA continuous SCLK after all bytes were read
Part Number: ADS124S06 Dear Sir, I have a question about RDATA command of the section 9.5.4.2 of d/s. About DOUT/DRDY data if SCLK is continuing after all bytes were read which is after CRC were read...
View ArticleForum Post: ADS8866: Low Power
Part Number: ADS8866 Good afternoon.... I would like to run this device in ultra low power (ie take advantage of the datasheet spec of 50nA ).....I have Vref at 2.5V and DVDD/AVDD at 3.3V....If I shut...
View ArticleForum Post: RE: ADS124S06: ADS124S06 RDATA continuous SCLK after all bytes...
Hi Masa, Both the ADS1248 and the ADS124S06 have a command to read the conversion results (RDATA) and also have a direct read method. For the ADS1248 , the direct method is accomplished by first...
View ArticleForum Post: RE: DAC38J84: FIFO Errors
Continuous SYSREF did not work - I still get an 0x3 for Lanes 2 and 3 at 0x66 and 0x67 on DACs 2 and 3. It is repeatable across boards. I also misspoke earlier - we are using an 8 Pulse SYSREF...
View ArticleForum Post: ADS124S06: ADS124S06 Insert WREG command during Read Data Direct
Part Number: ADS124S06 Dear Sir, I have a question on Figure 92 of d/s. I understand WREG can change conversion data like MUX and PGA Gain as the figure 92 shows. My question is if the changed...
View ArticleForum Post: RE: DAC8775: Typical and minimum value of package height
Hi Garrett, Thank you for your comments. I've confirmed the reason why the customer asked. Let's discuss this topic internally. I'll send email. Thanks! Best regards, Takeshi Sasaki
View ArticleForum Post: ADS124S06: ADS124S06 Power-on-reset at supply voltage drop
Part Number: ADS124S06 Dear Sir, At section 9.4.1.1 on page 59 of d/s, it has the following description: "a brown-out event occurs, when the supplies have dipped below the minimum operating voltages."...
View ArticleForum Post: RE: ADS54J66: SPI, 24b vs 32b, page selection and EVM config files.
Hi Jim, I've figured out what the issue is, I just don't know how to solve it. My DVDD line is 1.8V The ADC's won't release the MISO line after their CS has been pulled up. I have 4 hooked up right now...
View ArticleForum Post: RE: ADS1255: SPI clock SCLK duty spec
Hi Uchikoshi-san, I discussed this today with a digital designer and our recommendation is to try and keep the duty cycle to min 40% and max 60%. In addition to the setup and hold times, there may be...
View ArticleForum Post: RE: CCS/AFE4900EVM: AFE4900 initial
Hi, Have you enabled DC lead off detect ? If yes, please disable it and capture the ECG data. Since in DC lead off detect the AFE injects some current into to the input pins , you might not get the ECG...
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