Part Number: DEM-OPA-SO-1A FOR EVAL BOARD : DEM-OPA-SO-1A, WE REQUIRED BOM TO BE POPULATED ON THE PCB WITH SCHEMATICS, ASSEMBLY INSTRUCTIONS AND TESTING PROCEDURE AS PER DATA SHEET.
Part Number: DEM-BUF-SO-1A Hi Team,
A customer has this board but they are having 10x attenuated output and not unity gain.
The board was assembled as per the schematic with the corresponding value:
Rin1 = 50 ohms; Rin2 = 25 ohms; Rout 1= 50 ohms; Rout2…
Hi Jarrod,
That's a good point. I checked in design. In VCA die, SDOUT buffer is working on 3.3V supply. So when SDOUT is driven by VCA die, it will be 3.3V and when driven by ADC die, it will 1.8V. But since the SDOUT of two dies are shorted and the…
Hello WorkerBee,
I am going to go through your statements and provide feedback for each one:
WorkerBee said: the DEMx[1:0] pins control the Vod and De-emphasis, which affect the ouput drive of the channel
the EQx[1:0] pins control the EQ settings which…
Hello Nick, Thank you for your input.
As per your suggestion I have done transient analysis, but I see for 1.5V and 2V input the control voltage from OPA820 to VCA to be same. Attached the transient results for both the inputs. Is this correct? does control…
Hi Nicholas,
thanks a lot for the fast feedback.
So to understand from the post above is that you already have boards with the traces of LDO1 to the SD card domain of the SoC? To that affect, is the wrap wire populated and you're trying to avoid powering…
Hi Harish-san,
OK, I understand that I_PK(dem) is the reference generated from the loop.
So, is it possible to determine the exact timing when output voltage sampling is triggered from the scopeshot?
How can my customer estimate the timing if the CS falling…