Tool/software:
Dear team,
My customer want to find suitable device to satisfy below condition.
I think ADS7263 is good option but the customer want to 4 ch ADC without input MUX. Is there any device to satisfy below condition?
- Min…
Tool/software:
Dear team,
My customer want to find suitable device to satisfy below condition.
I think ADS7263 is good option but the customer want to 4 ch ADC without input MUX. Is there any device to satisfy below condition?
- Min…
Hi there,
the figure and table on page 3 of the datasheet shows that:
pin 11 = SDO-A
pin 12 = SDO-B
whereas Figure 52 on page 28 (layout example) shows
Pin 11 = SDO-B
pin 12 = SDO-A
Which is correct? Thanks in advance!
Hello Jose,
In order to meet the datasheet specifications, the common mode input voltage must be 2.5V+/-0.1V.
If you drive the inputs outside of the common mode range, the INL, gain, THD, and other specs will be degraded. I'm not sure exactly how much…
Hi,
I am using ADS7851 and noticed that in the datasheet the maximum input is 2* Vref or AVdd. I then noticed the VCM is spec'd very tight around 2.5V. If I need to make my common mode voltage 3.3V (or some other voltage other than…
Hello Bidault,
If you have a schematic or a block diagram of your system, try to see what the failed part may do.
Then use the parts lookup, search for the 851 marking.
From parts lookup;
http://www.ti.com/packaging/docs/partlookup.tsp#divline
Search…
On page 9 of the datasheet (April 2014), figure 2, it shows that the MSB comes out on the third falling edge of SCLK and should be latched by the host on the third rising edge. On page 22, table 2, it shows that the MSB comes out…
Hi I.K.,
Yes, you can most certainly use 2x ADS7054 to simultaneously sample two signals. We have a design that interleaves multiple ADS7056 devices (a faster, single-ended version of the ADS7054) to achieve a higher throughput. While not identical to…
Hi Biser,
In that case, is it a plausible solution to have both SPI interfaces on the BB Black act as masters, and have SCLK on SPI0 and SCLK on SPI1 provide separate, 24 MHz clock signals to SCLK on two ADCs (ADS7054) like in the below picture?
Regards…
Hi Evan,
It turns out I can't configure the SPI interface on the BB Black as a slave.
If I use two of the ADS7054 instead (www.ti.com/.../ads7054.pdf) do you think it'd be better to configure it like the below picture, where I have the BB Black SPI…
I.K. Anyiam said:The ADS7851 has two SPI data outputs, requiring me to use both SPI interfaces on the BB Black since each interface only has one SPI data input. This would then require me to connect the SCLK pins on the BB Black and have one act as a…
Part Number: BEAGLEBK
Hello team,
I asked this on the Precision Data Converters Forum, please see here: 
Can I simply connect the SCLK output from SPI1 to the SCLK of SPI0 and set SPI0 as a slave, or is there a specific procedure for this? Also, if SPI0…
Hi Biser,
Thanks for your reply, I was unaware of that. To my understanding, this is the main issue now:
The ADS7851 has two SPI data outputs, requiring me to use both SPI interfaces on the BB Black since each interface only has one SPI data input. This…
Hi, I've recently purchased ADS7851
With QFN16 to DIP16 adapter I connected it to Raspberry Pi, trying to communicate via SPI.
However, I'm facing some problems, which might be unique one for this product since ADS7851 doesn't…
Hello Itabi
We do not have REFOUT_X current mentioned in electrical char table. We do have graph showing internal reference output current Vs output voltage at 25C. Please refer to figure 36 on page16 of datasheet. It will give fair estimate of internal…
Hello Luis,
thank you for your explanation!
Hello Filip,
The ADS7851 is a SAR ADC, therefore the inputs of the device have to be driven with a low impedance source. In order to obtain the expected performance, the external driving circuit must be able to completely charge the ADC's internal sampling…
