Saa700 +ad1865

dariusku · 2nd November 2006, 06:58 AM

Hi,
Is it possible to connect AD1865 to SAA 7000 (non oversampling) ?
Thanks
Darius

rfbrw · 2nd November 2006, 11:34 AM

Yes

dariusku · 2nd November 2006, 11:48 AM

Thanx for good news. Then question-how?

dariusku · 2nd November 2006, 11:54 AM

Now & connected http://tube.fw.hu/no_oversampling.pdf .Wanna compare with AD1865.

dariusku · 8th November 2006, 06:37 AM

Hi
could somebody tell how change SAA7000 output format to 2' complement?
Thanks

rfbrw · 8th November 2006, 08:57 AM

See the datasheet for the SAA7020.

dariusku · 8th November 2006, 09:44 AM

SAA7020 pin 38 (Gap) .Disconnect from ground and connect to +5V (?) via 1k resistor. Am & right?

rfbrw · 8th November 2006, 09:50 AM

Yes.

dariusku · 9th November 2006, 05:35 AM

Hi
So & connected +5V to 38 pin SAA7020 ,made 16 bit output from SA7000 . & hear weak music and loud HF noise. What else should & do?

rfbrw · 9th November 2006, 07:57 AM

It is not quite as simple as it looks. The SAA7000 loads the dac with a 14/16 bit burst clock. The AD1865 is an 18bit device. Therefore you don't have enough clock cycles to fully load the AD1865. The simplest solution is to use the AD1856 or the PCM56 or use a digital filter. Using an 18bit or higher chip without a digital filter requires quite a bit of glue logic.

2nd November 2006, 06:58 AM	#1
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	Saa700 +ad1865 Hi, Is it possible to connect AD1865 to SAA 7000 (non oversampling) ? Thanks Darius

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2nd November 2006, 11:34 AM	#2
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Yes

2nd November 2006, 11:48 AM	#3
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	Thanx for good news. Then question-how?

2nd November 2006, 11:54 AM	#4
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	Now & connected http://tube.fw.hu/no_oversampling.pdf .Wanna compare with AD1865.

8th November 2006, 06:37 AM	#5
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	Hi could somebody tell how change SAA7000 output format to 2' complement? Thanks

8th November 2006, 08:57 AM	#6
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	See the datasheet for the SAA7020.

8th November 2006, 09:44 AM	#7
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	SAA7020 pin 38 (Gap) .Disconnect from ground and connect to +5V (?) via 1k resistor. Am & right?

8th November 2006, 09:50 AM	#8
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Yes.

9th November 2006, 05:35 AM	#9
dariusku diyAudio Member Join Date: Nov 2004 Location: Kaunas,LT	Hi So & connected +5V to 38 pin SAA7020 ,made 16 bit output from SA7000 . & hear weak music and loud HF noise. What else should & do?

9th November 2006, 07:57 AM	#10
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	It is not quite as simple as it looks. The SAA7000 loads the dac with a 14/16 bit burst clock. The AD1865 is an 18bit device. Therefore you don't have enough clock cycles to fully load the AD1865. The simplest solution is to use the AD1856 or the PCM56 or use a digital filter. Using an 18bit or higher chip without a digital filter requires quite a bit of glue logic.

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