DAC Reset Problem

briantse · 29th October 2003, 05:40 AM

Dear all,
I was want to prepare a circuit for DAC project.
Project flow : CS8414/8420 --> DF1706E --> PCM1704 --> OPA627 --> OPA134.
But I don't know how to do the system reset when I use CS8414. Is it use the Pin14 of DF1706? Or reset 8414? Any one can provied reference circuit?

Thankyou very much

Tieftoener · 29th October 2003, 05:06 PM

On the CS8414, you have to pull all 4 mode pins high. You could do this with some pull up resistors on the pins that normally need to be tied to ground.

Tieftoener · 29th October 2003, 05:09 PM

Oh,

I would think its best to do a system wide reset - so the DIR and the Digital Filter should be reset. To my knowledge, the DAC doesn't have a reset function... ??? I could be wrong though!

Elso Kwak · 29th October 2003, 06:45 PM

Quote:

Originally posted by briantse
Dear all,
I was want to prepare a circuit for DAC project.
Project flow : CS8414/8420 --> DF1706E --> PCM1704 --> OPA627 --> OPA134.
But I don't know how to do the system reset when I use CS8414. Is it use the Pin14 of DF1706? Or reset 8414? Any one can provied reference circuit?

Thankyou very much

Hi briantse,
Ues the resetcircuit as in the CS8414 datasheet.
See also:
http://db.audioasylum.com/cgi/m.pl?f...et&r=&session=
Pin 14 of the DF1604 is the reset of the digital filter. Wouldn't be too difficult to use that one too.

A 8 · 29th October 2003, 07:00 PM

Dunno what elsos link says but (for the 8420) just use a resistor to vdd and a cap to delay after power up.
A 47kohm and 47uF works fine for my (8420/DF1704/PCM1704) based dac.

In my set up the DF1704 and PCM1704 do not need a reset (after powerup), only the 8420.

29th October 2003, 05:40 AM	#1
briantse diyAudio Member Join Date: Aug 2003 Location: HK	DAC Reset Problem Dear all, I was want to prepare a circuit for DAC project. Project flow : CS8414/8420 --> DF1706E --> PCM1704 --> OPA627 --> OPA134. But I don't know how to do the system reset when I use CS8414. Is it use the Pin14 of DF1706? Or reset 8414? Any one can provied reference circuit? Thankyou very much

29th October 2003, 05:06 PM	#2
Tieftoener diyAudio Member Join Date: Nov 2002 Location: SE Wisconsin	On the CS8414, you have to pull all 4 mode pins high. You could do this with some pull up resistors on the pins that normally need to be tied to ground. __________________ Tieftoener -- You're ears can sense a movement in air that causes your eardrum to move less than 1/10th of the diameter of a Hydrogen atom! Don't abuse the one of the most amazing organs your Creator gave you!

29th October 2003, 05:09 PM	#3
Tieftoener diyAudio Member Join Date: Nov 2002 Location: SE Wisconsin	Oh, I would think its best to do a system wide reset - so the DIR and the Digital Filter should be reset. To my knowledge, the DAC doesn't have a reset function... ??? I could be wrong though! __________________ Tieftoener -- You're ears can sense a movement in air that causes your eardrum to move less than 1/10th of the diameter of a Hydrogen atom! Don't abuse the one of the most amazing organs your Creator gave you!

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29th October 2003, 07:00 PM	#5
A 8 diyAudio Member Join Date: Mar 2003 Location: Gothenburg	Dunno what elsos link says but (for the 8420) just use a resistor to vdd and a cap to delay after power up. A 47kohm and 47uF works fine for my (8420/DF1704/PCM1704) based dac. In my set up the DF1704 and PCM1704 do not need a reset (after powerup), only the 8420.

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