Multi-Channel Digital Volume Control - Page 1
Forum section: electronics / projects

author: Mike Warren
author_rank: Unknown
timestamp: April 16, 2015, 11:18:26 pm
content: I'm looking for a cheapish digital volume IC with at least 4 completely independent channels that's readily available.For a similar project in the past I've used the PT2258.http://www.futurlec.com/Others/PT2258pr.shtmlSpec-wise and price-wise, this chip is perfect for the job. What I don't like about it is that it's through-hole, and most importantly it's only available through Futurelec that I've been able to find. We had over 50% failure rate out of the box with these chips last time.Futurelec replaced all the faulty ones, but the situation was not something I'd like to repeat. I thought the price was too good to be true, but the specs were perfect for the project. More so than any of the expensive chips I could find at the time.I don't need as low as 50c, but don't want to pay $20+ either. Under $4 (in 100 qty) would be nice.Any suggestions?

author: moffy
author_rank: Super Contributor
timestamp: April 16, 2015, 11:54:50 pm
content: What about the NJU72342, 4 channel volume control from NJR?

author: Mike Warren
author_rank: Unknown
timestamp: April 17, 2015, 12:02:53 am
content: Thanks for the suggestion. Looks like it would do the job, but I can't find anyone who sells it.

author: moffy
author_rank: Super Contributor
timestamp: April 17, 2015, 12:12:04 am
content: Quote from: Mike Warren on April 17, 2015, 12:02:53 amTry their website:http://www.njr.com/sales/Seems to cover the world.

author: Mike Warren
author_rank: Unknown
timestamp: April 17, 2015, 12:16:00 am
content: Unfortunately, they list RS Componetnts, Mouser and Digikey, none of whom list this particular part. The regional distributors I usually aren't interested in talking such small orders, based on many attempts in the past.

author: moffy
author_rank: Super Contributor
timestamp: April 17, 2015, 12:27:52 am
content: Quote from: Mike Warren on April 17, 2015, 12:16:00 amPity. I have used the LM1972/2 channel previously, great chip. But it's only 2 channel, but reasonably priced and available.

author: nctnico
author_rank: Super Contributor
timestamp: April 17, 2015, 12:34:16 am
content: One of my customers used chips from NJR in medium volume products (say 100 to 200 pieces). IMHO you should be able to get them.

author: Bassman59
author_rank: Super Contributor
timestamp: April 17, 2015, 12:40:42 am
content: Quote from: Mike Warren on April 16, 2015, 11:18:26 pmPGA2311 is ~$8.00/qty 100 from Mouser. PGA4311 is ~$16/100. +/-5V, though; the part you had chosen was +9V.What about a digital pot followed by a buffer amplifier?-a

author: moffy
author_rank: Super Contributor
timestamp: April 17, 2015, 12:45:12 am
content: Quote from: Bassman59 on April 17, 2015, 12:40:42 amTrouble with audio is you have to watch out for the switching glitches, as they can be audible. You usually need something designed for audio.

author: KeepItSimpleStupid
author_rank: Regular Contributor
timestamp: April 17, 2015, 10:44:37 pm
content: Thishttp://www.profusionplc.com/pro/gex/pcatdtl0?ipartno=MAS6116EBisn't quad, but it seems really decent.

author: JeanLeGrand
author_rank: Newbie
timestamp: April 18, 2015, 11:10:41 pm
content: Here in the Netherlands they sell the M62429P real cheap. It is a stereo digital 0 to -83dB volume controller in steps of 1 dB. The Volume is controlled by a 2 wire interface. In your case you need to use two of them.http://documentation.renesas.com/doc/products/assp/rej03f0209_m62429pds.pdf

author: Mike Warren
author_rank: Unknown
timestamp: April 19, 2015, 05:49:39 am
content: I found one that matches my requirements, is available from Mouser and Digikey, and is within my comfortable price range:http://au.mouser.com/ProductDetail/STMicroelectronics/TDA744813TR/?qs=sGAEpiMZZMtuedWc5vOqGCAJ1k8PVv%2f9wFWgx0LLbbY%3d

author: JuKu
author_rank: Frequent Contributor
timestamp: April 19, 2015, 09:43:01 am
content: Nice fine. Specs are good and price is right. No mention on zero crossing. One sided supply, so potentially DC clicks (data sheet says typ. 0mV though). ST typically knows what they are doing so I'm guessing this will be fine. Let us know how it worked for you!

author: moffy
author_rank: Super Contributor
timestamp: April 19, 2015, 11:38:55 pm
content: Nice!

author: PeterFW
author_rank: Frequent Contributor
timestamp: April 20, 2015, 12:23:00 am
content: Quote from: JuKu on April 19, 2015, 09:43:01 amFound a video that said it was using this chip, could not hear anny rattling.Looks like a very nice find!