PCM1794A: LPF with INA1650

Gennadiy Poznyakov

Part Number: PCM1794A
Other Parts Discussed in Thread: PCM1794, OPA2132, NE5534

Hello!

I want to build a PCM1794 DAC and use a 12V battery with it. Please see if I organized one polar supply for LPF correctly?

Also LT1028 is currently out of stock. Is it possible to replace LT1028 with INA1650IPWR ?

Have I connected everything correctly for single polarity power supply?

Thank you!

over 2 years ago

0 Gennadiy Poznyakov over 2 years ago

Prodigy 140 points

Available ist LT1128. But I still do not know how it can be connected for a single polarity supply.

Or is it just an op amp and can be replaced with an OPA2132? If yes, how to do it?

0 Arash Loloee over 2 years ago in reply to Gennadiy Poznyakov

TI__Mastermind 23920 points

Hi Gennadiy, I will take a look at your schematics by tomorrow and give you some feedback. Although I am not the right person for opamps but still will give you my opinion all together.

Regards,

Arash

0 Gennadiy Poznyakov over 2 years ago in reply to Arash Loloee

Prodigy 140 points

Thanks a lot! I'll be waiting.

+1 Arash Loloee over 2 years ago in reply to Gennadiy Poznyakov

TI__Mastermind 23920 points

Hello, your overall approach is ok, You can use the following schematics as your guide for overall topology as well. watch for your VREF choice though. NE5534 operational amplifier is recommended for the I/V circuit to obtain the specified performance. Dynamic performance such as the gain bandwidth, settling time, and slew rate of the operational amplifier affects the audio dynamic performance of the I/V section.

If you want to go with different opamp selection, I would suggest you to post your question again and in the title only mention the opamps so the appropriate product line can answer you and suggest an alternative part.

Regards,

Arash

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PCM1794A: LPF with INA1650