Hi.
If I use the AD1580 for reference voltage (Figure 10, pin 36 datasheet), what is the value of Vref in the formula?
IOR, IOB (mA) = 7989.6 × Vref / Rset
Vref is 1.235 V (internal reference voltage) or 1,225 V (provided by the AD1580)?
regard…
You cannot use a positive linear regulator in a negative supply.
The linear regulator would regulate with respect to the -5V and not with respect to GND.
you could use a shunt regulator or a zener instead. Like AD1580 for example
Hi
This might be repeated question.
What is ADI recommended chircuit about ADV7123/7125 VREF pin when internal reference used?
0.1uF decoulping to VAA was mentioned in the schematic of old datasheet and P18/24 of the latest datasheet
but 1uF decoulping…
The recommended approach when using either the ADV7123 or ADV7125 is to use an external reference (as per datasheet) e.g. AD1580.
Attached is a reference schematic - also covered in the datasheet.
Hi,
Yes, I think the current is around some uA level only. This thread may be able to help you regarding the actual measurement. https://ez.analog.com/message/114854?commentID=114854#comment-114854
We also have some recommended voltage reference parts…
Hi,
The schematic would be covered in datasheet,Please crosscheck. Refer section - Circuit description and operation in datasheet.
Refer here Design and Layout of a Video Graphics System for Reduced EMI (Rev. AN-333) at https://www.analog.com/en/products…
Hi everyone,
I use the schematics in Datasheet (Figure 10. Typical Connection Diagram) on my design except AD1580 zener.
I want to use adv7125 for composite video, so IOR and IOB terminated with 50ohm which is same impedance value with IOG. IOG is doubly…
| LT1460 |
| LTC1258 |
| LT1021 |
| LT1027 |
| LTC1798 |
| RH1021-10 |
| RH1021-5 |
| RH1021-7 |
| LT6660 |
| LH0070 |
| LTC6655 |
| AD2700 |
| AD2702 |
| AD584S |
| REF01S |
| REF05S |
| REF10S |
| REF43S |
| REF02S |
| AD1582 |
| AD1583 |
| AD1584 |
| AD1585 |
| LT1019 |
| LT1236 |
| LTC6652 |
| REF02… |
Turning off PLL 1 fixed the problem. Is it a good idea to turn this off?
I'm only using DACs 1 to 3 so its hard to tell if its happening on DACs 4 to 6. It's definitely happening on DACs 1 and 2. DAC 3 is chroma and I haven't noticed it there…
