Long story short: I've made the mistake of integrating an LM1036 into a powered speaker I've been working on, only to realize later that it's a piece of junk. It doesn't handle 2vrms, it is ridiculously noisy and it oscillates at 41mhz when using the suggested circuit. I fixed the oscillation, but the noise it generates is a deal breaker. It only ended up in the design because a friend of mine has a box of 1000....
Right now I have this Rube Goldberg setup of a 4:1 mux, an arm processor controlling the LM1036 via an i2c digipot, and a 4th order analog crossover on the output. While I'm tearing this thing apart I'd also like to add a spdif input.
As far as I'm concerned I have a couple options:
1. Use a different analog tone control. Something like the TDA7439DS could replace the LM1036, the digipot and the mux. I would still need some sort of DAC with a spdif input, no idea what I would use for that.
http://www.st.com/web/en/resource/technical/document/datasheet/CD00004906.pdf
2. Use a system on a chip. The cirrus logic CS47024 looks like it could replace my whole front end, up to the amps.
http://www.cirrus.com/en/pubs/proBulletin/CS470xx_PB_0709.pdf
Option 1 seems like I can be up and running quicker. Option 2 is a little intimidating, not sure how easy it would be to implement the crossover filters in the SOC.
Thoughts? I've screwed this up once and I'd like to get it right the second time.
Right now I have this Rube Goldberg setup of a 4:1 mux, an arm processor controlling the LM1036 via an i2c digipot, and a 4th order analog crossover on the output. While I'm tearing this thing apart I'd also like to add a spdif input.
As far as I'm concerned I have a couple options:
1. Use a different analog tone control. Something like the TDA7439DS could replace the LM1036, the digipot and the mux. I would still need some sort of DAC with a spdif input, no idea what I would use for that.
http://www.st.com/web/en/resource/technical/document/datasheet/CD00004906.pdf
2. Use a system on a chip. The cirrus logic CS47024 looks like it could replace my whole front end, up to the amps.
http://www.cirrus.com/en/pubs/proBulletin/CS470xx_PB_0709.pdf
Option 1 seems like I can be up and running quicker. Option 2 is a little intimidating, not sure how easy it would be to implement the crossover filters in the SOC.
Thoughts? I've screwed this up once and I'd like to get it right the second time.