Forums

SD16 ADC vs External ADC

Started by vad_srikar June 22, 2006
have any of you guys used SD16 ADC in your application, whats the
useful number of bits, i am in a fix whether to use an external serial
ADC like AD977 or an SD16 of 427, Ad977 has obviously more advantages.
but has some one made these comparisions?

srikar

Beginning Microcontrollers with the MSP430

--- In m..., "vad_srikar" wrote:
>
> have any of you guys used SD16 ADC in your application, whats the
> useful number of bits, i am in a fix whether to use an external
serial
> ADC like AD977 or an SD16 of 427, Ad977 has obviously more
advantages.
> but has some one made these comparisions?
>
> srikar
>
I'm using sd16(m430f425) in weigh scale application ,
there is such appnote in TIwebsite.
Usefull bits - on 4.5mV full scale
range signal i have at least 3000 "true" divisions. TI's appnote
reports better results that these 3000 (10'000).
On other hands -
this is slow aplication, with big averaging.
bets regards,
stefan

Stefan: Could you send me the link of that AppNote ?
Thanks

_____

From: m... [mailto:m...] On Behalf Of
stefandk63
Sent: Jueves, 29 de Junio de 2006 05:06 a.m.
To: m...
Subject: [msp430] Re: SD16 ADC vs External ADC

--- In msp430@yahoogroups. com,
"vad_srikar" wrote:
>
> have any of you guys used SD16 ADC in your application, whats the
> useful number of bits, i am in a fix whether to use an external
serial
> ADC like AD977 or an SD16 of 427, Ad977 has obviously more
advantages.
> but has some one made these comparisions?
>
> srikar
>
I'm using sd16(m430f425) in weigh scale application ,
there is such appnote in TIwebsite.
Usefull bits - on 4.5mV full scale
range signal i have at least 3000 "true" divisions. TI's appnote
reports better results that these 3000 (10'000).
On other hands -
this is slow aplication, with big averaging.
bets regards,
stefan



--- FB wrote:

> Stefan: Could you send me the link of that AppNote ?
> Thanks
>

I'm not Stefan but I did find these appnotes on the TI site that mention the
SD16:

Single-chip weight scale
http://focus.ti.com/lit/an/slaa220/slaa220.pdf

Ultra-Low Power Motion Detection using the MSP430F2013
http://focus.ti.com/lit/an/slaa283/slaa283.pdf

MSP430F4270 Altimeter Demo
http://focus.ti.com/lit/an/slaa254/slaa254.pdf

Implementing a Single-Chip Thermocouple Interface with the MSP430x42x
http://focus.ti.com/lit/an/slaa283/slaa283.pdf

Regards,
Jim Dodd
Onset Computer Corp.

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