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Steve Barraclough

Sensor Footprint Evolution: Does Size Matter?

Steve Barraclough
RedDerek
RedDerek
8/20/2014 11:55:22 AM
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Master
Accelerometer redesign
About 6 years ago I was tasked to make a single axis accelerometer that was currently about 1.5" long by 0.75" diameter; the original design was from the 1980s. The original design was based on a strain gage with temperature compensation and adjustments on top. A bit of hunting around showed that the cost to make again in this form factor was prohibitive.

Jump to the solution... Using a MEMs accelerometer that was 5mmx5mm was the solution and size was the key factor. With some analog circuit manipulation and a tricked out power supply (since there is no real power provided to the strain gage), I was able to fit everything into the can and the cost was orders of magnitude cheaper than redesigning like the original.

So, I, for one, am glad that size matters. Even if it is much, much smaller than before. :-)

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Myanalog
Myanalog
8/11/2014 2:38:28 AM
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Master
Re: Sensor footprint
"I think functionality is major criteria compared to the size of the device. I am sure companies would love like to have more functionality at the cost of slightly bigger device."

Sachin EE, size also matters. That's the reason mobile companies are releasing the mini version along with their flag ship products. Eg, Samsung S4 & S4 Mini, S5 & S5 Mini etc

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vasanjk
vasanjk
7/31/2014 11:56:07 PM
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Master
Re: Moore's law
Absolutely. God knows how many such laws and theorems are waiting for re-examining yet.

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SachinEE
SachinEE
7/31/2014 6:02:48 PM
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Master
Re: TSV
I learned that size reduction was possible due to TSV, and with same this size reduction allowed it to integrate in apple iphone which boosted Bosch MEMS supply.

@samicksha, thanks for sharing this info. I am curious to know what is TSV and how this can help us in size reduction ?

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SachinEE
SachinEE
7/31/2014 5:59:17 PM
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Master
Re: Sensor footprint
How much it can be get reduced in size with more functionality is the big concern.

@Myanalog, I think functionality is major criteria compared to the size of the device. I am sure companies would love like to have more functionality at the cost of slightly bigger device.

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SachinEE
SachinEE
7/31/2014 5:47:06 PM
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Master
Re: Moore's law
 Moore's law may have to be redefined, it seems.

@vasanjk, I recently read an article about Moore's law. Intel's announcement that its next-generation 14nm process will be delayed a couple months triggered yet another round of fretting over the fate of this widely misunderstood "Moore's law". So even for the world's best engineers Intel's three-month blip is a reminder that process technology is becoming fiendishly complex.

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SachinEE
SachinEE
7/31/2014 11:07:22 AM
User Rank
Master
Expected?
I think that in some cases you were simply pointing out the obvious; things every design engineer knows but we just don't have the data to prove it. For instance, when it comes to wearable technology, one of the main objectives of the design engineer will be to keep it as light or as small as possible. As such, it follows naturally that sensors will inevitably be evaluated on price, efficiency and size. So all factors constant, you would expect the device's designer to go for the smallest in such situations.

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Myanalog
Myanalog
7/30/2014 3:33:21 AM
User Rank
Master
Sensor footprint
"However, the rise of the smartphone and tablet markets has delivered small, low cost sophisticated components which in turn are enabling wearable technology applications."

Steve, for mobility and wearable devices it's important that sensor footprint has to be reduced as much as possible, so that it can be fit easily to the board/device. How much it can be get reduced in size with more functionality is the big concern.

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vasanjk
vasanjk
7/30/2014 3:19:00 AM
User Rank
Master
Moore's law
Steve,


Thought-provoking article. MEMS devices find variety of applications in the emerging wearable technology trend. 215% increase in placement options? Moore's law may have to be redefined, it seems.

 

 

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samicksha
samicksha
7/29/2014 12:20:56 PM
User Rank
Artist
TSV
I learned that size reduction was possible due to TSV, and with same this size reduction allowed it to integrate in apple iphone which boosted Bosch MEMS supply.

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