Doepfer supply voltages...

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noddyspuncture
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Doepfer supply voltages...

Post by noddyspuncture » Sat Mar 24, 2018 10:47 am

Hi folks,

Has anyone tried running a Doepfer module on +/-15volts...?

All info I can find says +/-12v - was wondering if I can go higher..?

Cheers,
Tom

Ramases
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Post by Ramases » Sat Mar 24, 2018 2:29 pm

A lot of them are safe with +/-15V it would seem.

From this page:
http://www.doepfer.de/faq/a100_faq.htm#Current specifications
Power supply and case for A-100 modules

Most of the A-100 modules require a dual +/-12V supply. This means that the terminalsGND, +12V and -12V are necessary. Some older modules additionally require a +5V supply (e.g. A-113, A-190-1 and A-191). For each module you will find the current required for +/-12V in the module description. The power supply used must be be able to supply the current required by the modules, i.e. the sum of all currents of the modules used in your application.
Most of the modules will work with +/-15V power supply as well but some specifications given in the module description are no longer valid (e.g. range of some controls). Even some re-adjustments may be necessary (e.g. the feed through for A-114).

These modules will be damaged with +/-15V supplies: A-106-6, A-107, A-109, A-122, A-126, A-127 (old version with CEM3382), A-129/2, A-130 (old version with CEM3381/PA381), A-131 (old version with CEM3382), A-132-3 (old version with CEM3360), A-134 and A-135. These modules use the Curtis circuits CEM3360, CEM3381, CEM3382 or CEM3379. The max. supply voltage allowed for these integrated circuits is +/-12V. A +/-15V supply will destroy the very expensive CEM circuits ! The new versions of A-127, A-130, A-131 (all manufactured from ~2001) and A-132-3 use other circuits (e.g. LM13700) instead of the CEM circuits and will run with +/-15V without problems. Even the old versions of the modules A-148, A-150 and A-151 will not work with +/-15V. These modules may be damaged with +/-15V supplies too but the parts that may be destroyed (CD4052 or CD4053) are much cheaper than the expensive CEM chips. The old version of A-148 was manufactured until end of 1998, the old version of A-150 until summer 2004 and the old version of A-151 until spring 2005. The old versions of these modules can be identified by the type of electronic switches: in the old versions CD405x were used (CD4052 or CD4053), in the new versions DG4xx are used (DG409 or DG442 in the A-148, DG409 in the A-150 and A-151).

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noddyspuncture
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Post by noddyspuncture » Sat Mar 24, 2018 6:08 pm

Ramases wrote:A lot of them are safe with +/-15V it would seem.
Thanks for the info...!

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