Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th May 2011, 05:17 PM   #1
diyAudio Member
 
Join Date: May 2011
Default STA350BW - Quite interesting

Hello DIY'ers,

I have just received a email from ST Microelectronics about their new class-d amplifier with digital audio processing on chip.
I must say: It looks quite interesting for a compact amplifier solution.
Please take a look

STA350BW - STMicroelectronics

Regards,

Simon H.A.
  Reply With Quote
Old 19th May 2011, 10:12 AM   #2
diyAudio Member
 
Join Date: Apr 2011
Default Forget STA350BW

Hello,

(I'm french)

you have to purchase at least 1000 units....


There are no samples...


it's a "DDX" ternary techno with crossover

I hope we can snatch these chips, i think so

Bye
  Reply With Quote
Old 22nd August 2011, 06:14 PM   #3
diyAudio Member
 
Join Date: Sep 2007
Now available in single quantity. (digikey)
  Reply With Quote
Old 23rd August 2011, 08:37 AM   #4
trevmar is offline trevmar  United States
diyAudio Member
 
Join Date: Jan 2011
A fascinating chip, 8 biquads per channel is enough. But darn! I just purchased a spare miniDSP this week This chip would be ideal for my new suitcase-portable system...

I see the heatsink is facing down to the PCB, that is bad - this is intended for low-power applications only. Additionally, the distortion is high, rather like the TDA7498 I just struggled with for so long, just trying to achieve the results published on their data sheet.

The chip is the same (tiny) size as the TDA7498. Just a barely adequate HiFi power amplifier. Not audiophile.

I also note that there is no distortion vs frequency curve given. This was the area where the TDA7498 got into real trouble, with excessive distortion above 1KHz.
.
  Reply With Quote
Old 23rd August 2011, 10:18 AM   #5
trevmar is offline trevmar  United States
diyAudio Member
 
Join Date: Jan 2011
Actually, this new ST product range is looking quite interesting. They are obviously going after compact HiFi and active speakers in a big way. The STA350 can drive two stereo speakers plus a subwoofer, two stereo channels, or a mono channel. Quite a nice idea, this 'FFX'. Here is the press release: STMicroelectronics News: STA350BW Sound Terminal 2.1-channel high-efficiency digital audio system

They are consumer chips, but the Application note provided the data I was looking for, and the performance is actually much higher fidelity than the TDA7498. I attach the distortion vs frequency curve below.

The DSP is 24-28bit, less than the 48 bits of the MiniDSP, but probably adequate for their target market.

So where do I buy an application board? Where do I get the GUI control software they talk about in the application note? I have an application ready to drop this chip straight in
.
Attached Images
File Type: gif THD_vs_Distortion_STA350.gif (43.5 KB, 104 views)

Last edited by trevmar; 23rd August 2011 at 10:34 AM. Reason: typo
  Reply With Quote
Old 23rd August 2011, 11:01 AM   #6
trevmar is offline trevmar  United States
diyAudio Member
 
Join Date: Jan 2011
Information on the APworkbench software is at:
http://www.st.com/internet/com/MULTI...PWorkbench.swf
.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
These seem interesting. G Full Range 3 6th May 2008 12:32 PM
Quite interesting onis_uk Multi-Way 11 9th February 2008 06:44 PM
interesting amp & interesting problem m6tt Tubes / Valves 9 14th August 2007 06:28 PM
These are interesting. G Full Range 4 3rd April 2007 09:43 AM
New here, looks interesting. waltsongs Introductions 2 22nd March 2006 06:37 PM


New To Site? Need Help?

All times are GMT. The time now is 09:31 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2