Post by thread:[PIC]: 16 bit Audio DAC

Hi, I'm designing a PIC16F877 circuit that has audio output. I've been down the track of PWM output and 1 bit encoding etc, but have decided for this job to go for an external 16 bit serial input audio DAC. Presently I'm looking at the Philips TDA1545A chip in SO8 package. Should work nicely with data output from the '877s MSSP, but the part is proving hard to source in small quantities. Can anyone suggest something similar that might be more readily available? The TDA1545A is stereo but I'll only be using one channel. Thanks, Brent. -- Brent Brown, Electronic Design Solutions 16 English Street, Hamilton, New Zealand Ph/fax: +64 7 849 0069 Mobile/txt: 025 334 069 eMail: spam_OUTbrent.brownTakeThisOuTclear.net.nz -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

>Presently I'm looking at the Philips TDA1545A chip in SO8 package. >Should work nicely with data output from the '877s MSSP, but the part >is proving hard to source in small quantities. Can anyone suggest >something similar that might be more readily available? The TDA1545A >is stereo but I'll only be using one channel. Analog Devices make several, one of which Brook Shera used in his GPS disciplined reference oscillator. I obtained a couple as samples from AD for nothing. Part number is PCM61P on the original circuit, and the AD equivalent is AD1861N. It is actually an 18 bit device now I look at the documentation, but check out their website. Maxim also do such devices, and provide samples. However I suspect you may find that most will be more than 16 bits as the prime market is CD players and DVDs. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> >Presently I'm looking at the Philips TDA1545A chip in SO8 package. > >Should work nicely with data output from the '877s MSSP, but the part > >is proving hard to source in small quantities. Can anyone suggest > >something similar that might be more readily available? The TDA1545A > >is stereo but I'll only be using one channel. > > Analog Devices make several, one of which Brook Shera used in his GPS > disciplined reference oscillator. I obtained a couple as samples from > AD for nothing. Part number is PCM61P on the original circuit, and the > AD equivalent is AD1861N. It is actually an 18 bit device now I look > at the documentation, but check out their website. > > Maxim also do such devices, and provide samples. However I suspect you > may find that most will be more than 16 bits as the prime market is CD > players and DVDs. Thanks Alan, I forgot about Maxim and Analog Devices but have looked now and still didn't find the right one. Need 3V, 16 bits or more, 8 pin SOIC, cheap, lowish power, simple interface, available. DAC's for audio don't need the DC accuracies required by other applications too. Maxim have some nice new ones in a teeny tiny package but I'll try to avoid that. Thought there would be oceans of similar things around but apparently not. I've found a source now for the TDA1545A in 8 pin DIP, which might be OK. Princeton Technology make a compatible one (PT8215), which leads me to think it might be kind of an industry standard. -- Brent Brown, Electronic Design Solutions 16 English Street, Hamilton, New Zealand Ph/fax: +64 7 849 0069 Mobile/txt: 025 334 069 eMail: .....brent.brownKILLspam@spam@clear.net.nz -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Burr-Brown (TI) also do several audio DACs. On Wed, 19 Mar 2003 23:28:52 +1200, you wrote: {Quote hidden}>> >Presently I'm looking at the Philips TDA1545A chip in SO8 package. >> >Should work nicely with data output from the '877s MSSP, but the part >> >is proving hard to source in small quantities. Can anyone suggest >> >something similar that might be more readily available? The TDA1545A >> >is stereo but I'll only be using one channel. >> >> Analog Devices make several, one of which Brook Shera used in his GPS >> disciplined reference oscillator. I obtained a couple as samples from >> AD for nothing. Part number is PCM61P on the original circuit, and the >> AD equivalent is AD1861N. It is actually an 18 bit device now I look >> at the documentation, but check out their website. >> >> Maxim also do such devices, and provide samples. However I suspect you >> may find that most will be more than 16 bits as the prime market is CD >> players and DVDs. > >Thanks Alan, > >I forgot about Maxim and Analog Devices but have looked now and still >didn't find the right one. Need 3V, 16 bits or more, 8 pin SOIC, >cheap, lowish power, simple interface, available. DAC's for audio >don't need the DC accuracies required by other applications too. > >Maxim have some nice new ones in a teeny tiny package but I'll try to >avoid that. > >Thought there would be oceans of similar things around but apparently >not. I've found a source now for the TDA1545A in 8 pin DIP, which >might be OK. Princeton Technology make a compatible one (PT8215), >which leads me to think it might be kind of an industry standard. > >-- >Brent Brown, Electronic Design Solutions >16 English Street, Hamilton, New Zealand >Ph/fax: +64 7 849 0069 >Mobile/txt: 025 334 069 >eMail: brent.brownKILLspamclear.net.nz -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

>I forgot about Maxim and Analog Devices but have looked now and still >didn't find the right one. Need 3V, 16 bits or more, 8 pin SOIC, >cheap, lowish power, simple interface, available. DAC's for audio >don't need the DC accuracies required by other applications too. The other trick to watch for is that many of the newer serial DACs designed for audio/CD/DVD use seem to also have the ability to do decompression on the bit stream. One of my colleagues has been going through this loop in looking for 24 bit DACs to use with the big new accelerator ring being built here "real soon now" (well at least they had the ceremony to turn the first sod the other day). -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics