Power supply recommendation, Figure 83, in the AD9691(Rev 0) datasheet,
3.3V Input -> ADP2164 (1.8V) -> ADP125 -> AVDD1_SR
It is normal power supply sequence as I know.
But in the ADP125(Rev D) datasheet,
Input voltage supply range of ADP125…
I'm designing a circuit with some ADP125 LDOs for the analog supplies. In the abs. max. ratings, there is a requirement for VOUT:
VOUT to GND | -0.3V to VIN
This would clearly indicate that the regulator needs a reverse diode from…
The power supply diagram in above post makes me a little confused. It seems that both FMCA_VDJ and ADP125 output voltage are connected to the VDD_IF. May I ask that VDD_IF in developed board is supplied by ADP125 chip or FMCA_VDJ?
In our costumed…
I ended up using a device from Linear (LT3015EMSE) for thenegative rail, and the ADP125 for the positive rail, thanks for the help, I wassurprised that Analog did not have a solution, it would seem to be a natural tocomplement Analog’s core…
The ADM7151 is connected correctly and you say you have a similarissue with the ADP125. I am thinking that there is another power sourcethat is pulling up the LDO outputs via the protection diodes or some otherleakage path in the loads. We need to see…
In general I would point you to the ADIsimPower tool for identifying your best options
Here are a few options for you in the meantime:
- For the 14.8V to 5V you can use the ADP2370 or the ADP2300 (1/2/3)
- For the LDO from 5V to 3.3V we have…
The power supply you suggested will probably give you an output voltage ripple in the 15mV-20mV range. I am not sure this is low noise enough to power the AD7764. Unfortunately we have not tested it with this level of noise on the power supply…
I can answer you AD9625 datasheet questions for you:
Is the Full Scale Input fixed at 1.2Vpp or is it adjustable?
The Full Scale input is fixed and there is not a variable adjustment.
Does SPI_VDDIO have to be +2.5V as indicated on page…