TAS5760 MCLK generation

J Schwitalla

Other Parts Discussed in Thread: TAS5760M, TAS5706, TAS5708

TI,

Investigating the TAS5760M as a candidate part in a new design. Unfortunately, the I2S source for this amplifier only outputs SCLK, LRCK, and SDIN; but no master clock MCLK. It also has a modest limit of 6.2 MHz for SCLK and 96KHz for LRCK.

I do not believe that the TAS5760 can generate MCLK internally. As such, can you point me towards a simple solution to external MCLK generation besides a PLL?

Thanks,

Jay

over 12 years ago

0 Don Dapkus over 12 years ago

TI__Guru**** 189401 points

Hi, Jay,

Sorry for the delay in getting back with you.

What about some kind of multiplier off SCLK?

We have other devices that can run w/o MCLK, but for limited ratios.

-d2

0 J Schwitalla over 12 years ago in reply to Don Dapkus

Prodigy 20 points

Hi Don,

Good to hear, as what you suggested is our current solution (using a x4 PLL using SCLK to generate MCLK). My only concerns using the PLL are jitter, clock skew, and cost.

Since we are looking for an I2S input, mid-power, closed loop Class-D amp, the choices are limited.

Thanks,

Jay

0 Don Dapkus over 12 years ago in reply to J Schwitalla

TI__Guru**** 189401 points

Hi, Jay,

TAS5706/16 & TAS5708 are the only closed-loop options with MCLK=SCLK support, and even this is valid only for 44.1K/48K Fs clock (64*Fs SCLK, MCLK).

I would recommend TAS5708 as it is our second-generation device. TAS5706/16 are first generation.

-d2

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TAS5760 MCLK generation