STA350BW - Quite interesting

Shatronics · 17th May 2011, 05:17 PM

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.

studiotan · 19th May 2011, 10:12 AM

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

jtrantow · 22nd August 2011, 06:14 PM

Now available in single quantity. (digikey)

trevmar · 23rd August 2011, 08:37 AM

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.
.

trevmar · 10:34 AM

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

.

trevmar · 23rd August 2011, 11:01 AM

Information on the APworkbench software is at:
http://www.st.com/internet/com/MULTI...PWorkbench.swf
.

17th May 2011, 05:17 PM	#1
Shatronics diyAudio Member Join Date: May 2011 Location: Gentofte	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.

19th May 2011, 10:12 AM	#2
studiotan diyAudio Member Join Date: Apr 2011	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

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22nd August 2011, 06:14 PM	#3
jtrantow diyAudio Member Join Date: Sep 2007	Now available in single quantity. (digikey)

23rd August 2011, 08:37 AM	#4
trevmar 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. .

23rd August 2011, 11:01 AM	#6
trevmar diyAudio Member Join Date: Jan 2011	Information on the APworkbench software is at: http://www.st.com/internet/com/MULTI...PWorkbench.swf .

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