Is anybody using MSP430 with a 3.6V battery (CR2) ?
Is it ok to use, since 3.6v is the max Vcc.
-Hithesh
MSP430+3.6V battery
Started by ●February 24, 2012
Reply by ●February 24, 20122012-02-24
Hithesh :
> Is anybody using MSP430 with a 3.6V battery (CR2) ?
> Is it ok to use, since 3.6v is the max Vcc.
>
> -Hithesh
The 3.6V cells can have 3.7 volts. Too much - according to the datasheet.
Use coin cells (3volts) instead or add a diode or a LDO.
M.
> Is anybody using MSP430 with a 3.6V battery (CR2) ?
> Is it ok to use, since 3.6v is the max Vcc.
>
> -Hithesh
The 3.6V cells can have 3.7 volts. Too much - according to the datasheet.
Use coin cells (3volts) instead or add a diode or a LDO.
M.
Reply by ●February 24, 20122012-02-24
Practically the MAXIMUM RECOMMENDED voltage applied between Vcc and Vss
is -0.3 to +4.1V, so a differential of 4.4V. In my early test it to
death sessions with the '149 they ran quite happily at 5V, all functions
and peripherals worked, although i didin't life test them. I can tell
you that 12V normally kills them (though oddly not always, but it does
kill the I/O port pin it hits on.) I regularly use the MSP430 with
LI-poly batteries which at extreme low loads can show a voltage of 4.2V
to the micro, although usually even under quite light loads this is
around 3.7V. So 3.7V won't kill them, and is unlikely to shorten their
life by any measurably definable amount either.
And I personally dislike coin cells for various reasons, but mostly
because of their poor low temperature performance, and poor performance
at relatively low loads (20mA). Starting voltages at 0C and below can be
as low as 2.4V under load.
Cheers
Al
On 24/02/2012 6:13 PM, Matthias Weingart wrote:
> Hithesh:
>
>> Is anybody using MSP430 with a 3.6V battery (CR2) ?
>> Is it ok to use, since 3.6v is the max Vcc.
>>
>> -Hithesh
> The 3.6V cells can have 3.7 volts. Too much - according to the datasheet.
> Use coin cells (3volts) instead or add a diode or a LDO.
>
> M.
>
>
is -0.3 to +4.1V, so a differential of 4.4V. In my early test it to
death sessions with the '149 they ran quite happily at 5V, all functions
and peripherals worked, although i didin't life test them. I can tell
you that 12V normally kills them (though oddly not always, but it does
kill the I/O port pin it hits on.) I regularly use the MSP430 with
LI-poly batteries which at extreme low loads can show a voltage of 4.2V
to the micro, although usually even under quite light loads this is
around 3.7V. So 3.7V won't kill them, and is unlikely to shorten their
life by any measurably definable amount either.
And I personally dislike coin cells for various reasons, but mostly
because of their poor low temperature performance, and poor performance
at relatively low loads (20mA). Starting voltages at 0C and below can be
as low as 2.4V under load.
Cheers
Al
On 24/02/2012 6:13 PM, Matthias Weingart wrote:
> Hithesh:
>
>> Is anybody using MSP430 with a 3.6V battery (CR2) ?
>> Is it ok to use, since 3.6v is the max Vcc.
>>
>> -Hithesh
> The 3.6V cells can have 3.7 volts. Too much - according to the datasheet.
> Use coin cells (3volts) instead or add a diode or a LDO.
>
> M.
>
>
Reply by ●February 24, 20122012-02-24
The CR2 is not a coin cell. It's half the length of AA. -
http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
They are advertised as 3v and 3.6v.
I took a CR2 cell which said 3v on the label, but when I tested it, it was
3.6v.
Have you guys used CR2 with MSP430?
-Hithesh
http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
They are advertised as 3v and 3.6v.
I took a CR2 cell which said 3v on the label, but when I tested it, it was
3.6v.
Have you guys used CR2 with MSP430?
-Hithesh
Reply by ●February 24, 20122012-02-24
We are currently (hah!) using a CR2 with an MSP430.
--- In m..., Hithesh wrote:
>
> The CR2 is not a coin cell. It's half the length of AA. -
> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> They are advertised as 3v and 3.6v.
>
> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> 3.6v.
>
> Have you guys used CR2 with MSP430?
>
> -Hithesh
>
>
--- In m..., Hithesh wrote:
>
> The CR2 is not a coin cell. It's half the length of AA. -
> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> They are advertised as 3v and 3.6v.
>
> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> 3.6v.
>
> Have you guys used CR2 with MSP430?
>
> -Hithesh
>
>
Reply by ●February 24, 20122012-02-24
i WAS RESPONDING TOI mATTHIAS who suggested a coin cell, not to you
directly. An unloaded cell will usually read significantly higher than a
loaded one. there is no problem using a 3.6V cell with an MSP430.
Al
On 24/02/2012 10:19 PM, Hithesh wrote:
> The CR2 is not a coin cell. It's half the length of AA. -
> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> They are advertised as 3v and 3.6v.
>
> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> 3.6v.
>
> Have you guys used CR2 with MSP430?
>
> -Hithesh
>
>
>
directly. An unloaded cell will usually read significantly higher than a
loaded one. there is no problem using a 3.6V cell with an MSP430.
Al
On 24/02/2012 10:19 PM, Hithesh wrote:
> The CR2 is not a coin cell. It's half the length of AA. -
> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> They are advertised as 3v and 3.6v.
>
> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> 3.6v.
>
> Have you guys used CR2 with MSP430?
>
> -Hithesh
>
>
>
Reply by ●February 24, 20122012-02-24
Watt are you using it for? Does it ampere functionality in any way?
sorry
Al
On 24/02/2012 10:39 PM, Edd wrote:
> We are currently (hah!) using a CR2 with an MSP430.
>
> --- In m..., Hithesh wrote:
>> The CR2 is not a coin cell. It's half the length of AA. -
>> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
>> They are advertised as 3v and 3.6v.
>>
>> I took a CR2 cell which said 3v on the label, but when I tested it, it was
>> 3.6v.
>>
>> Have you guys used CR2 with MSP430?
>>
>> -Hithesh
>>
>>
sorry
Al
On 24/02/2012 10:39 PM, Edd wrote:
> We are currently (hah!) using a CR2 with an MSP430.
>
> --- In m..., Hithesh wrote:
>> The CR2 is not a coin cell. It's half the length of AA. -
>> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
>> They are advertised as 3v and 3.6v.
>>
>> I took a CR2 cell which said 3v on the label, but when I tested it, it was
>> 3.6v.
>>
>> Have you guys used CR2 with MSP430?
>>
>> -Hithesh
>>
>>
Reply by ●February 24, 20122012-02-24
Good one.
--- In m..., Onestone wrote:
>
> Watt are you using it for? Does it ampere functionality in any way?
>
> sorry
>
> Al
>
> On 24/02/2012 10:39 PM, Edd wrote:
> > We are currently (hah!) using a CR2 with an MSP430.
> >
> > --- In m..., Hithesh wrote:
> >> The CR2 is not a coin cell. It's half the length of AA. -
> >> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> >> They are advertised as 3v and 3.6v.
> >>
> >> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> >> 3.6v.
> >>
> >> Have you guys used CR2 with MSP430?
> >>
> >> -Hithesh
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
--- In m..., Onestone wrote:
>
> Watt are you using it for? Does it ampere functionality in any way?
>
> sorry
>
> Al
>
> On 24/02/2012 10:39 PM, Edd wrote:
> > We are currently (hah!) using a CR2 with an MSP430.
> >
> > --- In m..., Hithesh wrote:
> >> The CR2 is not a coin cell. It's half the length of AA. -
> >> http://search.digikey.com/us/en/products/CR-2L%2FBUN/P650-ND/2194949
> >> They are advertised as 3v and 3.6v.
> >>
> >> I took a CR2 cell which said 3v on the label, but when I tested it, it was
> >> 3.6v.
> >>
> >> Have you guys used CR2 with MSP430?
> >>
> >> -Hithesh
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
Reply by ●February 24, 20122012-02-24
Or just use a voltage regulator. But 3.6 is the max recommended so you
can go to 3.7 but TI gives no guarantees that everything will be peachy
if you do. From my experiences company like to cover there own butts
and more likely than not Al is very correct and practically no damage is
done to the chips at those voltages. Usually it is safe to add about
10-20% to recommended voltages or other ratings and be fine, passive
components might be a slight exception.
Jake
On 2/24/2012 3:20 AM, Onestone wrote:
>
> Practically the MAXIMUM RECOMMENDED voltage applied between Vcc and Vss
> is -0.3 to +4.1V, so a differential of 4.4V. In my early test it to
> death sessions with the '149 they ran quite happily at 5V, all functions
> and peripherals worked, although i didin't life test them. I can tell
> you that 12V normally kills them (though oddly not always, but it does
> kill the I/O port pin it hits on.) I regularly use the MSP430 with
> LI-poly batteries which at extreme low loads can show a voltage of 4.2V
> to the micro, although usually even under quite light loads this is
> around 3.7V. So 3.7V won't kill them, and is unlikely to shorten their
> life by any measurably definable amount either.
>
> And I personally dislike coin cells for various reasons, but mostly
> because of their poor low temperature performance, and poor performance
> at relatively low loads (20mA). Starting voltages at 0C and below can be
> as low as 2.4V under load.
> Cheers
>
> Al
>
> On 24/02/2012 6:13 PM, Matthias Weingart wrote:
> > Hithesh>:
> >
> >> Is anybody using MSP430 with a 3.6V battery (CR2) ?
> >> Is it ok to use, since 3.6v is the max Vcc.
> >>
> >> -Hithesh
> > The 3.6V cells can have 3.7 volts. Too much - according to the
> datasheet.
> > Use coin cells (3volts) instead or add a diode or a LDO.
> >
> > M.
> >
> >
> >
> >
> >
> >
> >
> >
can go to 3.7 but TI gives no guarantees that everything will be peachy
if you do. From my experiences company like to cover there own butts
and more likely than not Al is very correct and practically no damage is
done to the chips at those voltages. Usually it is safe to add about
10-20% to recommended voltages or other ratings and be fine, passive
components might be a slight exception.
Jake
On 2/24/2012 3:20 AM, Onestone wrote:
>
> Practically the MAXIMUM RECOMMENDED voltage applied between Vcc and Vss
> is -0.3 to +4.1V, so a differential of 4.4V. In my early test it to
> death sessions with the '149 they ran quite happily at 5V, all functions
> and peripherals worked, although i didin't life test them. I can tell
> you that 12V normally kills them (though oddly not always, but it does
> kill the I/O port pin it hits on.) I regularly use the MSP430 with
> LI-poly batteries which at extreme low loads can show a voltage of 4.2V
> to the micro, although usually even under quite light loads this is
> around 3.7V. So 3.7V won't kill them, and is unlikely to shorten their
> life by any measurably definable amount either.
>
> And I personally dislike coin cells for various reasons, but mostly
> because of their poor low temperature performance, and poor performance
> at relatively low loads (20mA). Starting voltages at 0C and below can be
> as low as 2.4V under load.
> Cheers
>
> Al
>
> On 24/02/2012 6:13 PM, Matthias Weingart wrote:
> > Hithesh>:
> >
> >> Is anybody using MSP430 with a 3.6V battery (CR2) ?
> >> Is it ok to use, since 3.6v is the max Vcc.
> >>
> >> -Hithesh
> > The 3.6V cells can have 3.7 volts. Too much - according to the
> datasheet.
> > Use coin cells (3volts) instead or add a diode or a LDO.
> >
> > M.
> >
> >
> >
> >
> >
> >
> >
> >
Reply by ●February 25, 20122012-02-25
Dear Hitesh,
Since most of the application if you check there will be a diode in between 3.6V Battery and the MSP430 Vcc , (minimum drop of diode will be 0.2 V) .
Regards,
Balu.J
From: m... [mailto:m...] On Behalf Of Hithesh
Sent: Friday, February 24, 2012 11:16 AM
To: m...
Subject: [msp430] MSP430+3.6V battery
Is anybody using MSP430 with a 3.6V battery (CR2) ?
Is it ok to use, since 3.6v is the max Vcc.
-Hithesh
Since most of the application if you check there will be a diode in between 3.6V Battery and the MSP430 Vcc , (minimum drop of diode will be 0.2 V) .
Regards,
Balu.J
From: m... [mailto:m...] On Behalf Of Hithesh
Sent: Friday, February 24, 2012 11:16 AM
To: m...
Subject: [msp430] MSP430+3.6V battery
Is anybody using MSP430 with a 3.6V battery (CR2) ?
Is it ok to use, since 3.6v is the max Vcc.
-Hithesh
