TDA7318 preamp

bostjancek · 3rd March 2006, 10:42 AM

Hello !

Have anybody used TDA7318 chip preamplifier? If yes what do you think is worth to build?

If you look at the datasheet it seems to be rather good choice. DATASHEET

Cheers

davidsrsb · 3rd March 2006, 03:31 PM

THis looks like a car audio component. The distortion is a bit high, SNR is only OK if your input level is optimum , tone controls are too close to 1KHz and input separation is marginal.

adi2san · 7th March 2006, 02:52 PM

I have used in the past this IC for a small amplifier (I2C communication with an AVR microcontroller, also used for LCD, IR Receiver).
I can only say that this chip is quite noisy (in the datasheet the S/N ratio seems preety good, but i think they measured it in different conditions than normal use - high output audio level, etc).
The tone corrections are not that good as well (the bass frequency is too high, etc.), I guess this was intended for an average car audio sound system (cutoff frequency > 100Hz).
So, bottom line is that this circuit is not good enough for high fidelity in my opinion, there are some specialized ICs for High Fidelity but they are hard to find.

aditya · 1st May 2010, 01:32 PM

hii could you share the TDA7318 schematics and software, i m interested but curently using pga2311 with pic18f452...

Quote:

Originally Posted by adi2san

I have used in the past this IC for a small amplifier (I2C communication with an AVR microcontroller, also used for LCD, IR Receiver).
I can only say that this chip is quite noisy (in the datasheet the S/N ratio seems preety good, but i think they measured it in different conditions than normal use - high output audio level, etc).
The tone corrections are not that good as well (the bass frequency is too high, etc.), I guess this was intended for an average car audio sound system (cutoff frequency > 100Hz).
So, bottom line is that this circuit is not good enough for high fidelity in my opinion, there are some specialized ICs for High Fidelity but they are hard to find.

3rd March 2006, 10:42 AM	#1
bostjancek diyAudio Member Join Date: Aug 2003 Location: Koper	TDA7318 preamp Hello ! Have anybody used TDA7318 chip preamplifier? If yes what do you think is worth to build? If you look at the datasheet it seems to be rather good choice. DATASHEET Cheers __________________ Some are born with more and some born with less so don't take for granted the life we've been blessed it's hard to understand thet we're only a guest and each one of us shall be put to life's test.

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3rd March 2006, 03:31 PM	#2
davidsrsb diyAudio Member Join Date: Dec 2005 Location: Kuala Lumpur	THis looks like a car audio component. The distortion is a bit high, SNR is only OK if your input level is optimum , tone controls are too close to 1KHz and input separation is marginal.

7th March 2006, 02:52 PM	#3
adi2san diyAudio Member Join Date: Apr 2005 Location: Brasov	I have used in the past this IC for a small amplifier (I2C communication with an AVR microcontroller, also used for LCD, IR Receiver). I can only say that this chip is quite noisy (in the datasheet the S/N ratio seems preety good, but i think they measured it in different conditions than normal use - high output audio level, etc). The tone corrections are not that good as well (the bass frequency is too high, etc.), I guess this was intended for an average car audio sound system (cutoff frequency > 100Hz). So, bottom line is that this circuit is not good enough for high fidelity in my opinion, there are some specialized ICs for High Fidelity but they are hard to find.

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