Help me in choosing a low power microcontroller.

[vamanan]

low power microcontroller+india

Hi All,
I am designing a hand held device which will operate on 3V battery. I am looking for a microcontroller which should work on 3V and of low power type. Main requirement is that it should have a ADC port. Your suggestions welcome.
Regards,
Vamanan

 

[sau_sol]

low power microcontroller comparison

try avr controllers with an L extension (low power)

they have internal ADC
and depending on your application choose atmega16 , 32 , 128, 132, .....

 

[shoaibali]

microcontrollers that work on 3v

Hi All,
I am designing a hand held device which will operate on 3V battery. I am looking for a microcontroller which should work on 3V and of low power type. Main requirement is that it should have a ADC port. Your suggestions welcome.
Regards,
Vamanan

Check msp430 mcus from ti

 

[bobcat1]

list of low power microcontrollers

Hi
It is fairly depend on the software - whether your controller continuously work or interrupted from sleep mode.

Whether it is working continuously - choose the MSP430

Whether it is working interrupted - choose the STM32

1) MSP4340 from TI - the lowest power micro in the world (when working - not in sleep mode) it has a 16 bit core and can works up to 16MHz 300uA/Mhz

2)STM32 & STM32L powerfull Arm cortex best core (32 bit) , the L version can go down to 2uA in sleep mode and 0.8mA/Mhz

Ps.The MSP430 cost more then the STM32

there are also PIC & AVR 8 bit micro if you work in inrerrupt mode

All the best

Bobi

 

[cameo_2007]

choosing pic microcontroller

PIC 18 series

 

[L Varalakshmi]

how to choose the best pic microcontroller

Go for this site...

https://www.digikey.com/

 

[vijay s]

low power low voltage microcontroller

you can use PIC micro with LF series.ie., Low Voltage series. They can operate even in 2V depends on your clock frequency.

i also suggest MSP430 as TI market them as Ultra-Low Power Microcontrollers.

 

[mrgargolo]

microcontroller lf series

Hello,

I agree with some suggestions already provided, so the MSP430 may be a good option. Also, you may want to take a look to the Flexis 8-bit/32-bit families from Freescale. Those MCUs can be powered from 1.8V and have a decent consumption in sleep mode.

Take into account that depending on what your sleep mode strategy will be, no matter what MCU you use you have to design to squeeze the maximum performance at the lower power consumption. When in total sleep mode, then there is no problem.

Some hints:

1. Define your sleep mode strategy. Look for papers talking about low power design and power aware systems for references.
2. If your system has to process data at periodic basis during sleep, make sure the MCU is ON for a short time, then return to sleep mode.
3. Asynchronous events have to be proceesed quicly, i.e. ISRs
4. Configure your peripherals for sleep mode, if possible, turn-of those devices that consume more power.
5. Configure the MCU ports in sleep mode for the minimum current consumption.

Hope this helps,

 

[mvs sarma]

stm32l

Go for this site...

https://www.digikey.com/

Perhaps, one could purchase PIC Microcontrollers right in India If Vamanan is in India. M/s silicon components Mumbai (www.siliconcomponents.net) sells them.

 

[doraemon]

cortex-m3 sleep mode

Hello!

Operate on a 3V battery is fine, but :
- How big is your battery?
- How long should it operate?
If it's for 10 minutes, I guess any processor can make it.
If it's for 10 years, then the choice will be limited.
Having some more accurate data could help to find an optimal solution.

Dora.

Hi All,
I am designing a hand held device which will operate on 3V battery. I am looking for a microcontroller which should work on 3V and of low power type. Main requirement is that it should have a ADC port. Your suggestions welcome.
Regards,
Vamanan

 

[vamanan]

power msp430 microcontroller comparison

To mvs sarma
I am in India and I will purchase the micon from the source you suggested.
To doraemon
I want my device work for 900 hours with two AA battery. If you have more ideas to share please do it.

 

[nikhil_damle]

PIC 16f64/16c84 can be beter choice as they are easily availble, low power, easy programble and the main design need has many analog channels

 

[doraemon]

Hello!

I guess anybody will suggest his favorite processor... so I'll do the same.

Whether it is working continuously - choose the MSP430
Whether it is working interrupted - choose the STM32

For your info, there are also interrupts on MSP430, and furthermore
the chip is designed to work in bursts rather than continuously, as explained
in **broken link removed** page 3, because of its fast wakeup (< 1µs).


Now let's see what we need:
2 AAs working for, say, 1000 hours. A NimH AA battery is typically 2000 mAh,
so you will have an average of 2 mA available.

Now, you have to consider other parameters: will the ADC work continuously?
If yes, at which rate? Do you have to process its output data in real time, as soon
as they are available? What is the complexity of the processing? Is it something
like comparison and alert if it crosses a threshold or is it heavier processing
like FFT, digital filtering, etc?
Once you get all that on paper, you should evaluate the processing power,
then set a processor frequency (not more than needed otherwise the
consumption will increase).

As for MSP430, the consumption for the latest models is less than 0.25mA/MIPS.
And if you don't need to process data continuously, there are sleep modes below
1µA (check the latest datasheets, I don't remember if it's 300 or 700 nA).


Dora

To mvs sarma
I am in India and I will purchase the micon from the source you suggested.
To doraemon
I want my device work for 900 hours with two AA battery. If you have more ideas to share please do it.