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Alternative sound processor IC? — Parallax Forums

Alternative sound processor IC?

kittmasterkittmaster Posts: 77
edited 2011-01-18 05:02 in Propeller 1
I got my max4411's today, didn't even think to look at the package type.......well so much for that.

Is there an alternative for this device that is a gullwing SO or a DIP? There is no way to hand solder this thing effectively.

[noparse]:([/noparse]

Any ideas?

Comments

  • Paul BakerPaul Baker Posts: 6,351
    edited 2007-12-20 02:21
    Aw crud, you got that part from the demo board schematic, didn't you? I didnt think to mention that there are two chips which are QFN (The FTDI chip is the other one, which there is a SO package equivalent), which pretty much require reflow soldering. My suggestion is to find an alternate amplifier of a suitible package.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
  • kittmasterkittmaster Posts: 77
    edited 2007-12-20 02:28
    Paul,

    The max4411 is the sound chip, doesn't ftdi only do USB? I didn't see anything on their site for sound. Is this just a normal linear opamp?

    would an LM386 or 741 do the same job? I haven't read the 4411 datasheet, so just looking for an easy alternative
  • kittmasterkittmaster Posts: 77
    edited 2007-12-20 02:29
    opps.......yes right from demo sheet
  • Paul BakerPaul Baker Posts: 6,351
    edited 2007-12-20 02:55
    Here's the datasheet http://datasheets.maxim-ic.com/en/ds/MAX4411-MAX4411B.pdf
    I don't think the choice is critical as to which one to choose; while I'm sure there are better amps out there, a 386 should work but perhaps find a 3.3V variant.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
  • AleAle Posts: 2,363
    edited 2007-12-20 19:05
    Maxim characterizes for having the smallest packages around... a LM358 (dual OPamp) in a DIP-8 package will work well... you can power it from 5 V if they are available on the board. A TL072 or 082 will also work. Blocking DC caps will be needed, some 100 to 220 uF will do smile.gif, I'm sure Analog Devices or TI have plenty of options also
  • Andreas JakobAndreas Jakob Posts: 23
    edited 2007-12-20 21:12
    I used the TDA7050 on my Prop Board.
    It's a very cheap IC and works perfect.
    Available as DIP-8 or SO-8.

    [url=http://www.nxp.com/#/pip/pip=[pip=TDA7050_CNV_2]|pp=[v=d,t=pip,i=TDA7050_CNV_2,fi=,ps=0][0]]www.nxp.com/#/pip/pip=[noparse][[/noparse]pip=TDA7050_CNV_2]|pp=[noparse][[/noparse]v=d,t=pip,i=TDA7050_CNV_2,fi=,ps=0][noparse][[/noparse]0][/url]
  • DgswanerDgswaner Posts: 795
    edited 2007-12-20 22:37
    are you looking for an amp or a signal processing chip? I can point you to a few amp circuits, I even have PCB layouts and bom's for them. I have one working with my Proto board, it works quite well.

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    "A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

    DGSwaner
  • kittmasterkittmaster Posts: 77
    edited 2007-12-20 23:33
    Well I'm building my own module board based on the demo board datasheet, I figured I'd give the module all the bells and whistles the demo board has. It seems that any old op amp will do, It would be cool to use a TDA chip since its on board preamp (I believe), but since I'm using 5V for the rail, it may draw to much current, so I'm thinking just a good strong pre-amp will do.

    I can build a TDA as a seperate module to connect to the prop preamp.

    I figured by building to the demo sheet that would be the best way to go, but prototyping it has become a real labor. Once I get my parts tomorrow I can finalize my schematic and start to build my prototype.......can't wait!
  • Paul BakerPaul Baker Posts: 6,351
    edited 2007-12-21 00:25
    You are providing a 3.3V rail too, correct?

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
  • kittmasterkittmaster Posts: 77
    edited 2007-12-21 00:36
    Yes, 7805 runs some sections, and a 3.3V for the prop and other 3.3 requirements of other chips for eeprom etc.
  • Paul BakerPaul Baker Posts: 6,351
    edited 2007-12-21 00:42
    Ok, just got a little worried about how you talked about the 5V rail, made me wonder if you were going to try to drive the Propeller from 5V (happened more times than you would think).

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
  • RaymanRayman Posts: 14,887
    edited 2007-12-21 00:54
    The TDA7050 looks good. Do you really need those 50uF caps at the outputs though?
  • kittmasterkittmaster Posts: 77
    edited 2007-12-21 00:55
    LOL......

    No I got that one down cold......My 8051 has 2 amp of 5 voltage for add on modules, so it will recieve its power via the ribbon cable header to from the external onboard regs from the 8051 and then brought down to 3.3V to power the prop and eeprom parallax circuits.....

    I've just posted my latest and greatest......hopefully it will be set up properly.....I think I covered all the bases.
  • Toby SeckshundToby Seckshund Posts: 2,027
    edited 2011-01-18 01:27
    Rayman wrote: »
    The TDA7050 looks good. Do you really need those 50uF caps at the outputs though?

    For the "stereo" version yes, the o/p of the amps will be at 1/2 VDD. For the bridged mono cct they are both up at 1/2 VDD so all is well to connect the LS directly.
  • RaymanRayman Posts: 14,887
    edited 2011-01-18 03:22
    I use the MAX4410, which is almost like the MAX4411 but comes in a leaded package. It does require 4 extra external resistors though...
  • LeonLeon Posts: 7,620
    edited 2011-01-18 04:18
    Nerd2 wrote: »
    Could some post a circuit showing how to use an opamp like a LM386 instead of the max 4411?

    The LM386 isn't an op amp, it's a (poor quality) audio amplifier. I'd use a TDA7052, fewer components and much better quality.

    It's been replaced by the TDA7052A, BTW.
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-01-18 05:02
    Nerd2: The LM386 datasheet has some sample circuits. You will require the RC between the gain?? pins to increase amplification. But I'd use another like perhaps what Leon suggested.
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