Demultiplexing Excitation from AD7746
For my application, I would like to demultiplex the excitation from AD7746 in order to sequentially direct it to different leads. I am not familiar with issues for maintaining signal fidelity when...
View ArticleRe: AD-FMComms2 HDL support for Altera FPGAs
Hi Rejeesh - Thanks. I understand, I really do! Because I spent the last couple of hours setting up a dummy Quartus project with our target board and the I/Os from your daughter card. I need Pete to...
View ArticleADP5024: How to connect an unused Buck regulator
Hello, I was unable to find an answer to this in the datasheet... how should I connect the following ADP5024 pins if I do not want to use the second Buck regulator? VIN2, VOUT2, SW2, FB2, PGND2...
View ArticleADV7625 - OSD Enable and Transitioning between OSDs
Hello,We have been users of the ADV7623 for a number of years. We have developed OSD that does not use the ADI OSD Design tool and instead goes directly to the OSD register map and OSD Ram for OSD...
View ArticleRe: ADuC7061 ADC temperature drift and reference resistor temperature drift
There are 5 ADuC7061. In industrial environments with ambient temperature ranges from −40°C to +40°C is necessaryto use anotherADC.
View ArticleRe: How to communicate with ADE7754 to make an energy meter with PIC18F2520
Hi MARS Yes. For voltage channel, 1000:1 attenuation, using resistor divider, is common. So, it is fine. Please make sure that, even when the line voltage is at its absolute maximum value, it doesn't...
View ArticleRe: How to use SIMD to speed up FIR filter with circular buffering
Hi Mahesh, If I understand the code correctly, the first instruction "s0 = dm(i0, m1);" is NOT a dummy read. You need to initialize both r0 and s0 before SIMD mode takes effect. If r0 is not...
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Re: Level meter not showing correct levels.
Hi Miguel, I suspect that your advice above, asking, " Is it possible that you have some DC going through the signal chain that you are not aware of?", may hold the key to a solution. After...
View ArticleRe: A qeustion about "mixing down" a freqency
Hi Skfir, I neglected to describe how multiplying two signals "mixes down" (or up) in frequency. Starting with the two input sinusoidal waves of frequency F1 and F2 respectively: Wave1 =...
View ArticleRe: AD-FMComms2 HDL support for Altera FPGAs
Ok -here's what's going on1) Altera does support Vita57.1 for FMC. However, your card is uses the "user-definable" pins. Altera did a somewhat arbitrary assignment of their (non-bidirectional) LVDS...
View ArticleIs ADIS16209 Self-test success tilt dependent
I'm testing the ADIS1620x/PCB. I'm noticing that I get self-test failures when self-tests are performed using the method described in the FAQ, if the tilt is at 90 degrees (x-axis < 350). Self-test...
View ArticleBF518F DMA Questions
We are experiencing intermittent issues with data integrity when using DMA. Things generally work great and we are releasing to production very soon, but we have an issue with corruption of data and...
View ArticleRe: ADV7511 has problem to output NTSC 480i
Hi Dave, Thanks a lot. I just talked to our hardware guy. He checked the input to ADV7180, and it is clean. Plus the video output of PAL doesn't have such issue. If there is a noise(ie. ground loop) in...
View ArticleRe: AD9228 resetting conditions
Dear Doug-san Thank you very much for prompt reply. I understood the register 0x00 does not make default register settings. So if we try to put default setting then we need to power-up again.or we need...
View ArticleRe: An AD9361 no-OS Driver Issue
Hi Dragos, Thanks for your reply. But I think I have found the reason. That is because I used a wrong SPI baud rate when I ported this no-OS driver into WinCE. When I decrease the baud rate, everything...
View ArticleRe: AD9228 resetting conditions
Dear Moto-san, I'm sorry I was not clear. Register 0x00 does restore default register settings.Register 0x08 does not restore default register settings. So, to put default settings back into the...
View ArticleRe: AD9228 resetting conditions
Dear Doug-san Sorry for my misunderstood.Register 0x00= 0x3C then back to default settings. additionally, power-up also clear and set the default settings, I think.Is it correct?If it is correct,Only...
View ArticleRe: AD9957's power supply
Hi xubing, Did my answers helped you in any way? You can mark them helpful or correct if it seems they are. If not, let me know and i'll close this thread by marking assumed answered.Thank you very...
View ArticleRe: Internal ADC reference selection
on customer board, there usually will be no jumpers to allow connect the external reference to the VREF0/1 pins mannually, so there is a conflict:1) after power up, it is configured to be internal...
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