Re: "High-Speed" ADC used for single-pulse conversion
Hi, Even our pipeline ADCs have a S/H function at the front end to sample the input (I think this equates to your "freeze" term), and they are triggered by a differential sample clock input. These...
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AD7656 reference error question
This is an odd question. I have a customer that designed a board using the AD7656-1. His proto boards were accidentally populated with the AD7656. He understands that he has insufficient decoupling....
View ArticleAD1974 PLL sometimes does not lock on power up
This is from a customer: Initial comments: The AD1974 is the main ADC that we are using and from day one (almost two years ago) these ADCs have had the issue that their internal PLL does not always...
View ArticleADAU1772 SPI Boot from uC
Hi all, I'm trying to program an ADAU1772 from a BF537. I'm having no issues with compiling and exporting the files from SigmaStudio and creating the macros in VisualDSP. However, it seems that the...
View ArticleAD9851 erratic starting and incrementing a serial word
Hello: I have two questions regarding an AD9851 DDs. I have been using the Analog Devices Application Note AN-557 as a guide for my own DDS VFO project and with its help I have been able to make a...
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Re: about VisualAnalog
Hi Kou-san, Yes, the AD9257 output Bits[13:0] are being counted as Bits[15:2]. There is a work-around we can do in the VisualAnalog Samples Canvas. There is a VisualAnalog Component called Bit Shifter....
View ArticleRe: 2 independent RF channels
Thank you for your response and suggestion. We are exploring different options just to limit the board density. If we need a receive only device, can we just use the output from one of the transmitter...
View ArticleRe: AD8138 differential gain and phase specifications
Hi, John. According to the apps engr of this part, the ADA4932 is the next-generation of AD8132 so it has a little better diff gain and phase errors. But if you will only replace AD8056, then AD8132 or...
View ArticleRe: ADC used for single-pulse conversion
Hi Postino, Here are some list of ADC that could be suitable for your application. You may also wanted to check the ADI website and do a parametric search and put in parameters on the ADC that you...
View ArticleAD5504 works, unless I have more than 1
I am communicating with an AD5504 with a microcontroller through USB. I can power up the DACs and write to the individual input registers. Everything works as it should, until I have two or more...
View ArticleRe: ADV7611 video issue...
Hi Chandravel, We have taken our ADV7611 and ADV7612 evaluation boards to several HDMI plugfests so we have a high-level of confidence in the hardware and software. However, if you are not using our...
View ArticleRe: ADXRS624 - Lowest Rate ?
Hi JoeNova, The lowest rate you can resolve will depend heavily on how well you control other system parameters. Supply voltage and temperature changes, among other factors, will have a large effect,...
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Re: how to get total harmonic distortion ................
Hi kishore.r Below is an example experiment that I conducted: Voltage signal appliedAmplitudeFundamental - V1FS/2= 353.55mVrms/2= 0.17677Vrms3rd harmonic - V3FS/10=353.55mVrms/10=0.035355Vrms5th...
View ArticleRe: adau1701 gpio selected level setting
Hi Bob Thanks for your answer. what do configure the DC1? hubijo
View ArticleRe: zc702 HDMI broken after update
The script output is attached. By "our userspace", do you mean that there is a root filesystem provided by Analog Devices? I've been using the old Linaro image referenced by the wiki page...
View ArticleRe: AD9129 Evaluation Board & Xilinx ML-605 Reference Design Questions
How do I connect to the device? The "mrd 0x76000000" command returns:XMD Not Connected to Any Target The commend "targets" returns:XMD Not Connected to Any Target I suspect I have to invoke the...
View ArticleCan ADXL375 BW_RATE register be set to '1111' and still operate I2C at 400kHz?
The BW_RATE register’s Rate bits define both the bandwidth and ODR. The ADXL375 datasheet states that the bits must be set to ‘1101’ (ODR=800, bandwidth=400) to run the I2C interface at 400kHz. It also...
View ArticleRe: ADUM3190 Operation at -55 Deg C
David: I asked the designer and he said that the circuit should operate at -55C. However, some parameters may be out of the datasheet specified range.Regards, Brian
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