ADF4351 internal and external voltages.
ADF4351 internal and external voltages.
hi all,
I just received my ADF4351 (see pic.) and I am a little puzzled...
in fact I noticed that on board there is a AMS1117-5.0 which is a 5 volts stabilizer...
as far as I know the ADF4351 needs 3.3 volt...maximum 3.6!
more over close to the DC input socket it's written: "DC 5V": but with 5 volts the AMS1117-5.0 cannot work as it needs at least 6.5 volts...
now I am wondering if they didn't put the wrong stabilizer on the board!!! if someone has got the same board can check and verify what stabilizer is on board?
thanks a lot in advance!!!
i2NDT Claudio
I just received my ADF4351 (see pic.) and I am a little puzzled...
in fact I noticed that on board there is a AMS1117-5.0 which is a 5 volts stabilizer...
as far as I know the ADF4351 needs 3.3 volt...maximum 3.6!
more over close to the DC input socket it's written: "DC 5V": but with 5 volts the AMS1117-5.0 cannot work as it needs at least 6.5 volts...
now I am wondering if they didn't put the wrong stabilizer on the board!!! if someone has got the same board can check and verify what stabilizer is on board?
thanks a lot in advance!!!
i2NDT Claudio
i2NDT Claudio
Dalmine, Italia
Dalmine, Italia
Re: ADF4351 internal and external voltages.
Hi Claudio
I have checked 2 units and they both have 1117-3 on them!
Well spotted - I think I would power with external 3volts!
73 Noel - G8GTZ
I have checked 2 units and they both have 1117-3 on them!
Well spotted - I think I would power with external 3volts!
73 Noel - G8GTZ
Re: ADF4351 internal and external voltages.
Checking my boards.
One has no regulator - it is a different design, much smaller.
One has two regulators - it has a USB interface.
One has a 3.3V regulator.
Mike
One has no regulator - it is a different design, much smaller.
One has two regulators - it has a USB interface.
One has a 3.3V regulator.
Mike
Re: ADF4351 internal and external voltages.
just to close the post:
I replaced the existing voltage regulator with an AMS1117-3.3 volt and now the board works perfecly well!!!
I replaced the existing voltage regulator with an AMS1117-3.3 volt and now the board works perfecly well!!!
i2NDT Claudio
Dalmine, Italia
Dalmine, Italia
Re: ADF4351 internal and external voltages.
Makes you wonder doesn't it. This arrived in the post. 5V regulator.
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- ADF435X.jpg (1.67 MiB) Viewed 7717 times
Re: ADF4351 internal and external voltages.
gasp!
when I checked the ADF4351 datasheet I remember I saw "Power supply: 3.0 V to 3.6 V".
unless it is a new ADF...but I don't think so!
probably they loaded the machine with the wrong reel of AMS1107...and, when they realized that all boards were unusable, sold them as junk!
someone bougth the junk and resold as good...
Claudio
when I checked the ADF4351 datasheet I remember I saw "Power supply: 3.0 V to 3.6 V".
unless it is a new ADF...but I don't think so!
probably they loaded the machine with the wrong reel of AMS1107...and, when they realized that all boards were unusable, sold them as junk!
someone bougth the junk and resold as good...
Claudio
i2NDT Claudio
Dalmine, Italia
Dalmine, Italia
Re: ADF4351 internal and external voltages.
Thanks for the warning. I've also just had 2 new ADF4351 modules delivered with 5 volt regulators on!
Dave, G8GKQ
Dave, G8GKQ
Re: ADF4351 internal and external voltages.
Unfortunately I have not got any AMS1117-3.3s or an order in progress to add one to, so have ordered some on Ebay. At 99p for 20, shipped from China, they seem far too cheap to be any good but we will see.
Re: ADF4351 internal and external voltages.
mmmmm...look at this offer...
https://www.ebay.it/itm/50PCS-AMS1117-3 ... SwaTFamf1I
50 for 1€!!!!!!!!!!
https://www.ebay.it/itm/50PCS-AMS1117-3 ... SwaTFamf1I
50 for 1€!!!!!!!!!!
i2NDT Claudio
Dalmine, Italia
Dalmine, Italia
Re: ADF4351 internal and external voltages.
Be careful. The last AMS1117-3.3s i bought from china with such a great deal gave 6.2v off load, 5,4V at 5 ma 4,4V at 15mA when 3 samples were tested. I binned them all in the end!
Buying voltage regulators from a "relaible source" is no guarantee either ..... https://g4fre.blogspot.co.uk/2016/11/if ... rnell.html
Dave
G4fre
Buying voltage regulators from a "relaible source" is no guarantee either ..... https://g4fre.blogspot.co.uk/2016/11/if ... rnell.html
Dave
G4fre