IEPE supply - LT3494 replaceable by TLV61046A (low noise important) ?

[shianne]

edit 2022-12-05 15:53: typo LT3439 to LT3494

Hello,

I am designing a low noise IEPE-enabled preamp for up to 100kHz with an gain up to 40dB.
I found an idea for a low noise IEPE source here: https://www.analog.com/en/design-center/reference-designs/circuits-from-the-lab/cn0540.html
They use a LT3494 to step up to 28V, a LT3008 to stabilize/filter and a LT3092 current source to control the current for IEPE.
For my op amp I need a symmetrical voltage, about +/-12V is OK, the current will usually be lower than 0.05A (I will feed max. 10Vpp into 1k, usually lower Vpp).
From another project I know that a TLV61046A with a charge pump will do the job.

While I'm thinking about it, couldn't one TLV61046A be used?
The LT3494 is specified as low-noise, the TLV is not.
Unfortunately, I have none of the units here to measure.

Are there any empirical values?
Are there better ideas?

(LT3008 is wrong in schematic, I've already seen it  )
Not true anymore, I got confused by myself 


Best wishes,

shianne