Mrthdrb

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Audio Conversion With ADS1243

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2

0

$begingroup$

How can I use the TI ADS1243 8-channel ADC to convert a line-level audio signal (ideally balanced) to a digital 24-bit (as stated on data-sheet) stream.

audio texas-instruments

share|improve this question

asked 2 days ago

James ConwayJames Conway

1317

$endgroup$

add a comment | 

2

0

$begingroup$

How can I use the TI ADS1243 8-channel ADC to convert a line-level audio signal (ideally balanced) to a digital 24-bit (as stated on data-sheet) stream.

audio texas-instruments

share|improve this question

asked 2 days ago

James ConwayJames Conway

1317

$endgroup$

add a comment | 

$begingroup$

How can I use the TI ADS1243 8-channel ADC to convert a line-level audio signal (ideally balanced) to a digital 24-bit (as stated on data-sheet) stream.

audio texas-instruments

share|improve this question

asked 2 days ago

James ConwayJames Conway

1317

$endgroup$

share|improve this question

asked 2 days ago

James ConwayJames Conway

1317

share|improve this question

asked 2 days ago

James ConwayJames Conway

1317

asked 2 days ago

James ConwayJames Conway

1317

asked 2 days ago

James ConwayJames Conway

1317

4 Answers
4

active

oldest

votes

6

$begingroup$

You can't. The datasheet is surprisingly vague on this point, but this is a low-speed ADC, intended for instrumentation applications. The analog bandwidth is just a few tens of Hz at most.

share|improve this answer

edited 2 days ago

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

$endgroup$

add a comment | 

6

$begingroup$

You don't.

The ADS1243 datasheet gives an analog bandwidth of maximum 14.6 Hz.

That's well below what anyone would normally call audio.

The ADS1243 is intended for high resolution sampling of slow changing measurements - the datasheet mentions weight scales and blood analysis as intended uses.

Certainly nothing about using it in a stereo system.

There are multichannel 24 bit audio codecs out there. The ADS1243 isn't one of them, though.

share|improve this answer

answered 2 days ago

JREJRE

23k53875

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Do you know of any "multichannel 24 bit audio codecs"
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Google barfed up a long list when I used that search term. Also, check Mouser or Digikey using those keywords. I've never built anything that needed such a beast.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Something like this is the wildest I've ever used. Also low speed. The biggest difficulty you will have is in actually making use of 24 bits. It can be a challenge to keep noise and crosstalk down to the point that those 24 bits represent signal instead of noise.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Something like mouser.co.uk/Texas-Instruments/Semiconductors/Interface-ICs/… be suitable?
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @JamesConway That looks like an appropriate choice to me.
  $endgroup$
  – Alex Hajnal
  2 days ago
  

  
  
  
  

add a comment | 

4

$begingroup$

The ADS1234 is a part designed for use in low bandwidth high resolution sensor sampling applications. In particular bridge style sensors are supported where gain is applied to the sensor reading and even 50/60 Hz filtering is performed. It indicates right in the "Features" section of the data sheet that signal sample rates of 10 or 80 samples per second are supported.

Audio sampling on the other hand is done at much higher rates. High performance audio sampling for CD is typically done at 44.1kHz and DVD at 48kHz. So as you can see, this device is not at all suitable for what you intend.

share|improve this answer

answered 2 days ago

Michael KarasMichael Karas

45k348105

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Okay, I have to ask, how did you do that cut effect in your image there? Do you use some screenshot software that automates it, or did you do it manually?
  $endgroup$
  – Hearth
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @Hearth - It is done manually in Microsoft Paint program. I could describe the steps that make it easy to if you are really interested.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Nah, I can see how to do it manually. I was just wondering if you had some quick and easy way to do it. Thanks!
  $endgroup$
  – Hearth
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Well my technique does not require me to do tedious manual erase of the text.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  

add a comment | 

2

$begingroup$

From the datasheet

When a 2.4576MHz crystal is used, the device can be programmed for an output data rate of 15Hz, 7.5Hz, or 3.75Hz. Under these conditions, the digital filter rejects both 50Hz and 60Hz interference.

With a maximum datarate of 15Hz, I think you can kiss audio goodbye

share|improve this answer

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

$endgroup$

add a comment | 

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6

$begingroup$

You can't. The datasheet is surprisingly vague on this point, but this is a low-speed ADC, intended for instrumentation applications. The analog bandwidth is just a few tens of Hz at most.

share|improve this answer

edited 2 days ago

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

$endgroup$

add a comment | 

6

$begingroup$

You can't. The datasheet is surprisingly vague on this point, but this is a low-speed ADC, intended for instrumentation applications. The analog bandwidth is just a few tens of Hz at most.

share|improve this answer

edited 2 days ago

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

$endgroup$

add a comment | 

$begingroup$

You can't. The datasheet is surprisingly vague on this point, but this is a low-speed ADC, intended for instrumentation applications. The analog bandwidth is just a few tens of Hz at most.

share|improve this answer

edited 2 days ago

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

$endgroup$

share|improve this answer

edited 2 days ago

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

answered 2 days ago

Dave Tweed♦Dave Tweed

123k9152265

6

$begingroup$

You don't.

The ADS1243 datasheet gives an analog bandwidth of maximum 14.6 Hz.

That's well below what anyone would normally call audio.

The ADS1243 is intended for high resolution sampling of slow changing measurements - the datasheet mentions weight scales and blood analysis as intended uses.

Certainly nothing about using it in a stereo system.

There are multichannel 24 bit audio codecs out there. The ADS1243 isn't one of them, though.

share|improve this answer

answered 2 days ago

JREJRE

23k53875

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Do you know of any "multichannel 24 bit audio codecs"
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Google barfed up a long list when I used that search term. Also, check Mouser or Digikey using those keywords. I've never built anything that needed such a beast.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Something like this is the wildest I've ever used. Also low speed. The biggest difficulty you will have is in actually making use of 24 bits. It can be a challenge to keep noise and crosstalk down to the point that those 24 bits represent signal instead of noise.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Something like mouser.co.uk/Texas-Instruments/Semiconductors/Interface-ICs/… be suitable?
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @JamesConway That looks like an appropriate choice to me.
  $endgroup$
  – Alex Hajnal
  2 days ago
  

  
  
  
  

add a comment | 

6

$begingroup$

You don't.

The ADS1243 datasheet gives an analog bandwidth of maximum 14.6 Hz.

That's well below what anyone would normally call audio.

The ADS1243 is intended for high resolution sampling of slow changing measurements - the datasheet mentions weight scales and blood analysis as intended uses.

Certainly nothing about using it in a stereo system.

There are multichannel 24 bit audio codecs out there. The ADS1243 isn't one of them, though.

share|improve this answer

answered 2 days ago

JREJRE

23k53875

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Do you know of any "multichannel 24 bit audio codecs"
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Google barfed up a long list when I used that search term. Also, check Mouser or Digikey using those keywords. I've never built anything that needed such a beast.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Something like this is the wildest I've ever used. Also low speed. The biggest difficulty you will have is in actually making use of 24 bits. It can be a challenge to keep noise and crosstalk down to the point that those 24 bits represent signal instead of noise.
  $endgroup$
  – JRE
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Something like mouser.co.uk/Texas-Instruments/Semiconductors/Interface-ICs/… be suitable?
  $endgroup$
  – James Conway
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @JamesConway That looks like an appropriate choice to me.
  $endgroup$
  – Alex Hajnal
  2 days ago
  

  
  
  
  

add a comment | 

$begingroup$

You don't.

The ADS1243 datasheet gives an analog bandwidth of maximum 14.6 Hz.

That's well below what anyone would normally call audio.

The ADS1243 is intended for high resolution sampling of slow changing measurements - the datasheet mentions weight scales and blood analysis as intended uses.

Certainly nothing about using it in a stereo system.

There are multichannel 24 bit audio codecs out there. The ADS1243 isn't one of them, though.

share|improve this answer

answered 2 days ago

JREJRE

23k53875

$endgroup$

share|improve this answer

answered 2 days ago

JREJRE

23k53875

answered 2 days ago

JREJRE

23k53875

answered 2 days ago

JREJRE

23k53875

4

$begingroup$

The ADS1234 is a part designed for use in low bandwidth high resolution sensor sampling applications. In particular bridge style sensors are supported where gain is applied to the sensor reading and even 50/60 Hz filtering is performed. It indicates right in the "Features" section of the data sheet that signal sample rates of 10 or 80 samples per second are supported.

Audio sampling on the other hand is done at much higher rates. High performance audio sampling for CD is typically done at 44.1kHz and DVD at 48kHz. So as you can see, this device is not at all suitable for what you intend.

share|improve this answer

answered 2 days ago

Michael KarasMichael Karas

45k348105

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Okay, I have to ask, how did you do that cut effect in your image there? Do you use some screenshot software that automates it, or did you do it manually?
  $endgroup$
  – Hearth
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @Hearth - It is done manually in Microsoft Paint program. I could describe the steps that make it easy to if you are really interested.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Nah, I can see how to do it manually. I was just wondering if you had some quick and easy way to do it. Thanks!
  $endgroup$
  – Hearth
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Well my technique does not require me to do tedious manual erase of the text.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  

add a comment | 

4

$begingroup$

The ADS1234 is a part designed for use in low bandwidth high resolution sensor sampling applications. In particular bridge style sensors are supported where gain is applied to the sensor reading and even 50/60 Hz filtering is performed. It indicates right in the "Features" section of the data sheet that signal sample rates of 10 or 80 samples per second are supported.

Audio sampling on the other hand is done at much higher rates. High performance audio sampling for CD is typically done at 44.1kHz and DVD at 48kHz. So as you can see, this device is not at all suitable for what you intend.

share|improve this answer

answered 2 days ago

Michael KarasMichael Karas

45k348105

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Okay, I have to ask, how did you do that cut effect in your image there? Do you use some screenshot software that automates it, or did you do it manually?
  $endgroup$
  – Hearth
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @Hearth - It is done manually in Microsoft Paint program. I could describe the steps that make it easy to if you are really interested.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Nah, I can see how to do it manually. I was just wondering if you had some quick and easy way to do it. Thanks!
  $endgroup$
  – Hearth
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Well my technique does not require me to do tedious manual erase of the text.
  $endgroup$
  – Michael Karas
  2 days ago
  

  
  
  
  

add a comment | 

$begingroup$

The ADS1234 is a part designed for use in low bandwidth high resolution sensor sampling applications. In particular bridge style sensors are supported where gain is applied to the sensor reading and even 50/60 Hz filtering is performed. It indicates right in the "Features" section of the data sheet that signal sample rates of 10 or 80 samples per second are supported.

Audio sampling on the other hand is done at much higher rates. High performance audio sampling for CD is typically done at 44.1kHz and DVD at 48kHz. So as you can see, this device is not at all suitable for what you intend.

share|improve this answer

answered 2 days ago

Michael KarasMichael Karas

45k348105

$endgroup$

share|improve this answer

answered 2 days ago

Michael KarasMichael Karas

45k348105

answered 2 days ago

Michael KarasMichael Karas

45k348105

answered 2 days ago

Michael KarasMichael Karas

45k348105

2

$begingroup$

From the datasheet

When a 2.4576MHz crystal is used, the device can be programmed for an output data rate of 15Hz, 7.5Hz, or 3.75Hz. Under these conditions, the digital filter rejects both 50Hz and 60Hz interference.

With a maximum datarate of 15Hz, I think you can kiss audio goodbye

share|improve this answer

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

$endgroup$

add a comment | 

2

$begingroup$

From the datasheet

When a 2.4576MHz crystal is used, the device can be programmed for an output data rate of 15Hz, 7.5Hz, or 3.75Hz. Under these conditions, the digital filter rejects both 50Hz and 60Hz interference.

With a maximum datarate of 15Hz, I think you can kiss audio goodbye

share|improve this answer

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

$endgroup$

add a comment | 

$begingroup$

From the datasheet

When a 2.4576MHz crystal is used, the device can be programmed for an output data rate of 15Hz, 7.5Hz, or 3.75Hz. Under these conditions, the digital filter rejects both 50Hz and 60Hz interference.

With a maximum datarate of 15Hz, I think you can kiss audio goodbye

share|improve this answer

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

$endgroup$

share|improve this answer

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

answered 2 days ago

Neil_UKNeil_UK

78.5k284181

answered 2 days ago

Neil_UKNeil_UK

78.5k284181