I see here, under "future improvements", that there are plans for Zero Copy being implemented in IIOD. The last time that was updated was over a year ago however. Since 3MSPS is not nearly enough for any serious application my question is; Is this something currently in the works, and if so, when can we expect a release?
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Plans for IIOD Zero Copy Support?
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SPICE model of AD8675 ... Problem ?
Hi,
I am currently simulating with the AD8675.
AC analysis.
If I use it with common feedback stuff. It works.
But the output can reach kilovolts with a supply of +/- 15V
On the other hand, on a particular setup, I do get some other strange behavior.
Joined you have a picture sowing the details.
V(OUT) should saturate at low frequencies.
Or should I avoid this kind of setup ?
Thank you already for your time :-)
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AD7175-8 on Raspberry Pi 3
Dear All,
Our project is to incorporate the AD7175-8 digital converter to Raspberry Pi 3.
We are using the implementation file written in C that we will compile into our Linux-based environment (Raspbian):
https://github.com/analogdevicesinc/no-OS/blob/master/drivers/ad717x/ad717x.c
Is that the best way to do it? We've seen couple drivers written in Verilog...
If yes, do we need to write additional lines of code to get continuous flow of data that we would eventually display or store to database? What output would we get at this point from ad717x.c ?
Thanks in advance
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Spice model of OP470 / Problem with the input bias current
Hi,
While testing the model of the OP470 Op-Amp which we plan to use on a MIL PCB, I found a problem during the transient analysis.
The datasheet of this component tells us that the input bias current should be around 10nA
But in the simulations I have a short between the / inputs and kilo-amps flowing through them.
Joined you have a picture of the setup.
Could you help me ?
Best regards,
Altay
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Amplifier signal analog
Hello,
I need to know if I can find a component to amplifie my analog signal (0-10V) about F=800 Hz to 20Khz. I need to amplifie my input signal by 10 thus my signal output is about 100 V (peak to peak). I don't need a great current but just my voltage output. I need to know if you have a component with the gain controlled in a class AB amplifier ? Thanks for your helps and can you give my the reference and how many it's cost. We need about 40 components.
Best regards
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Buck ic for 320Vout application
Hello,
Im searching a controller for high voltage buck.
500V:400V input -> 320V output. 300Khz-400Khz freq. 2KW.
i need also output current regulation as current limit...
I thought about LT3840 (with external drivers off course) but i know that i will have some problems with output current measure and current regulation due to the extream voltage.
1. There any other option connecting the current measurement resistor except in series with inductor? mabe somehow with current transformer?
2. Is there any other IC that fit for this app? i thought about lt3741 because of the Average Current Mode but this ic demand 2V at VIN above the output voltage - again, its not possible.
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LT4320 Minimum Voltage
The LT4320 datasheet summary says it is good for 72V AC, yet the absolute maximum rating table of the input pins says a minimum of -3V. I am confused?
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FPGA configuration of AD9269 with Kintex 705
Hello all,
I have brought AD 9269 and interposal card so that i can interface AD9269 with FMC header of Kintex 705. I have gone through data sheet but it will be very useful if i get VHDL code to start using AD 9269. I have gone through web i didn't find VHDL code to interface AD9269 with KIntex 705 with FMC header. somebody please provide some documents and code to start working with AD9269.
Thanks.
Regards,
Kumar K.
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AD5933 - Question about Real & Imaginary data
Hello,
I am trying to design continuous bioimpedance measurement system using AD5933.
I designed frequency sweep function with single cycle, and now I am on validation.
I referred the formula in data sheet to decide the gain factor using 1 kOhm resistor. (Calibration using 1 kOhm)
I decided each gain factor for each frequency, and below is the result of measurement for 1 kOhm. (Measure 1 kOhm)
Frequency: 10.00 kHz; Impedance: 0.96 kOhm; Real: 12, Img: -5,
Frequency: 20.00 kHz; Impedance: 1.04 kOhm; Real: 6, Img: 4,
Frequency: 30.00 kHz; Impedance: 1.11 kOhm; Real: 10, Img: 3,
Frequency: 40.00 kHz; Impedance: 0.92 kOhm; Real: 18, Img: 6,
Frequency: 50.00 kHz; Impedance: 1.23 kOhm; Real: 15, Img: 11,
Frequency: 60.00 kHz; Impedance: 1.08 kOhm; Real: 18, Img: 18,
Frequency: 70.00 kHz; Impedance: 1.08 kOhm; Real: 16, Img: 27,
Frequency: 80.00 kHz; Impedance: 0.99 kOhm; Real: 16, Img: 37,
Frequency: 90.00 kHz; Impedance: 1.07 kOhm; Real: 14, Img: 38,
Frequency: 100.00 kHz; Impedance: 0.98 kOhm; Real: 7, Img: 49,
And I measured 1.8 kOhm, but the result was not good. (Measure 1.8 kOhm)
Frequency: 10.00 kHz; Impedance: 0.30 kOhm; Real: 31, Img: -28,
Frequency: 20.00 kHz; Impedance: 0.10 kOhm; Real: 70, Img: 29,
Frequency: 30.00 kHz; Impedance: 0.10 kOhm; Real: 78, Img: 82,
Frequency: 40.00 kHz; Impedance: 0.12 kOhm; Real: 43, Img: 141,
Frequency: 50.00 kHz; Impedance: 0.13 kOhm; Real: -4, Img: 175,
Frequency: 60.00 kHz; Impedance: 0.15 kOhm; Real: -59, Img: 178,
Frequency: 70.00 kHz; Impedance: 0.17 kOhm; Real: -115, Img: 162,
Frequency: 80.00 kHz; Impedance: 0.21 kOhm; Real: -147, Img: 123,
Frequency: 90.00 kHz; Impedance: 0.22 kOhm; Real: -179, Img: 88,
Frequency: 100.00 kHz; Impedance: 0.24 kOhm; Real: -196, Img: 45,
So I want to ask two questions:
1. The Magnitude (sqrt(pow(Re,2)+pow(Img,2))) of 1.8 kOhm is higher than that of 1 kOhm so the impedance of 1.8 kOhm became lower than that of 1 kOhm (because Impedance is in inverse proportion to Magnitude by given formula). Then why is the Magnitude of 1.8 kOhm showed higher value than that of 1 kOhm?
2. I used only one resistor (1 kOhm) for calibration, but there was imaginary results that means the exist of the capacitance reactance. Should I assume that imaginary results as off-set?
Thanks,
Namho Kim
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LTC4366 -2
Hello everyone. i have a supresor circuit with LTC4366CDDB-2#PBF, it work fine when the overvoltage is about 2 seconds, but when overvoltage pass more that 2 seconds the Ltc4366-2 never restart from cool-down period.
I have to turn off the source and wait 9seconds in order to Ltc 4366 works fine again.
Vmin=10v, Vclamp=28 and Vmax=32V
attached circuit and all values parts. are there any mistake with the circuit?
Regards
Paola
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LTC 2984
Please let me know the sampling frequency of ADC in LTC 2984.
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Multiple questions about ADPD105 and ADPD108 and their evalboards
I work for a Medical device R&D company. We are currently working on a project where we are trying to detect physiological signals deep under the skin using IR which requires an emitter to detector distance of 4+ cm. Because of this, we need to use a large amount of current through the emitter to get deep enough and your ADPD10X components look like they could work. I got the eval board for the ADPD105 but it doesn't seem to let you use all the functions the chip has to offer. I wanted to try the digital integration mode but when I do the graph doesn't work. So first off, I am wondering if I am doing something wrong or if the eval only allows limited use. Second, I noticed you now have the new ADPD108 that is recomended for new designs but the datasheet looks the same as the ADPD105 so I was wondering what the difference is. lastly, when I looked at the datasheet for the eval board for the ADPD108, the schematic shows an ADPD107 but the text says ADPD108. I am just a little confused about that. Also, How can I obtain an eval board for the ADPD108, there is no buy option.
Thanks
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ADA4940-1 Vocm MAX＆MIN
Please inform me about the following specification.
Is this price the whole conditions（voltage＆temp etc） for use?
（Can I use ーVs=0V,Vocm＝0.9V)
How many would that it isn't all conditions be in case of all conditions?
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(ADP1046A ADP1055)What is the different between these two device?
Hi !
Our customer are using ADP1046A.
But maybe they will change to ADP1055.
What is the different between these two device?
I am reading datasheet now.
But I could not find anything other than the GPIO difference.
Best regards
Kawa
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I need to locate const data at a known location for one particular module. I have used the default_section pragma and modified the LDF and successfully located the const data for the target module. However, it is filled with 0's instead of the constant da
I have located the const data for the target source module using #pragma default_section (CONSTDATA, "NewConst"). I have also modified the LDF to put the first segment of the MEM_SDRAM0_BANK1 area into a new memory segment called MEM_SDRAM_BANK1A, and have placed "NewConst" into that area using a new section definition block. This all works just fine, and my linker map shows the const allocations for this module properly placed in the expected memory locations. However, when I examine this area at runtime, it is filled with 0's rather than the const data. There are no warnings or errors at link time.
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ltc3703 current limit
Hi,
I have a problem with the current limit function of the device.
I disabled the function but the IC still limit the current while the voltage at the RUN/SS-Pin is reduced.
I only have a load current of 0,5A@24V output voltage.
I didn't understand what happens inside the LTC3703.
Has anyone an idea ??
Regards
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user guide for ADRV9009
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How to install gnuradio & gr-iio block correctly in linux/windows PC ?
I have tried to install gnuradio in both linux & windows PC
To control the zedboard & AD9361, It must need hardware gr-iio block.
Like these:
After installing gnuradio, I didn't find these block.
How to install iio block correctly?
Thanks
Best regards
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ADV7610 with 1080p60 Input
I have ADV7610 as HDMI receiver and an SDI transmitter from another manufacturer on my PCBA. I could make 1080p24 video go through my PCBA, and the video came out on a monitor was perfect. My goal is to use 1080p60, but when I send 1080p60 to HDMI receiver, it didn’t work. When I switched input video from 24 frame to 60 frame, I adjusted frame setting at IO register 0x01.
My observation is that HSync coming out of ADV7610 is not stable, and the SDI analyzer cannot detect the format most time, in another word, it detects the format was 1080p60 time to time but very intermittently. While we can suspect signal integrity on the PCBA, I did adjusted signal driving strength at IO_0x14 and LLC DLL phase at IO_0x19 as many combinations as possible, but it didn't help. Are there any other register settings I need to change for 1080p60 like the registers setting with "ADI recommended setting" in script of the evaluation board?
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Ideal diode load switch turn-on speed?
Hi,
I am planning to use an ideal diode to reduce power dissipation, while having the ability to turn on/off the ideal diode, as a kind of load-switch.
The input voltage is somewhat lower(lets say 5% lower) than the output voltage, so the ideal diode wouldn't be on at all times. Only when a transient loads the output, it would drop enough to turn on the ideal diode and supply current doing the transient.
In 1-FET ideal diodes, the FET body diode handles the initial current, until the FET turns on and "shorts" the body diode. However, I would like to use a 2-FET solution, as I also need to be able to completely disconnect the input from the output.
I was looking to use the LTC4359 as shown in figure 6 in the datasheet(without C1 and R4), but I am concerned about the turn-on speed of the system. As far as I can see, the max gate current supplied by the LTC4359 is 10uA(typ). The total gate charge of the FQA140N10 and FDMS86101 is about 340nC(250nC+55nC), so with 10uA, it would take about 34ms to fully turn on the FETs. Since the body diodes are purposely opposite facing, they can't take care of the initial transient, before the FETs turn on.
In figure 16, a 100k resistor is placed across Q2(The switch-FET) in order to bias the source pin. How does this decrease gate ramp time? It lifts the Q2 source and gate to the level of its drain, but how does this reduce the turn-on time, when the gate-source voltage is still zero? How can I estimate which turn-on time a certain value resistor will result in?
Thank you.
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