DRV601: Using DRV601 line drive to drive 600 ohm speaker

Adarsh Hegde

Part Number: DRV601
Other Parts Discussed in Thread: PCM5102, PCM5102A, TAD5242, DRV603

Tool/software:

Hi,

I have this requirement where I need to store .WAV file in our system and my system shall be capable to play the stored .wav file using a headphone which has an impedance of 600Ω. Need help in selecting a suitable Audio DAC and Line Driver. Detailed explanation is as below.

We have a small duration .wav file, we are planning to use a SPI Flash to store this .wav file. But .wav file may need to be converted into a format such as PCM? To store it in external Flash, can this be done?.

If we are able store the audio .wav file in required format in SPI flash, my FPGA shall be will read and route it to Audio DAC using I2S protocol, DAC will decode the digital format of the audio data to a analog signal.

Since we need to drive the headphone with an impedance of 600Ω,we may need amplifier to achieve this? Hence would Line driver DRV601 be a good suite for this kind of application?

Thanks in advance.

26 days ago

0 Adarsh Hegde 25 days ago

Prodigy 90 points

Though PCM5102 has a integrated line driver but can supports load down to 1kΩ only, since we are looking for a Line driver which drives 600Ω we selected DRV601 hope this combination works fine (PCM5102->DRV601). If any precautions I need to take please let me know.

0 Sydney Northcutt 25 days ago in reply to Adarsh Hegde

TI__Genius 9600 points

Hello,

I am looking into your inquiry. Please expect a response Monday. Thank you for your patience!

Regards,
Sydney Northcutt

0 Sydney Northcutt 22 days ago in reply to Sydney Northcutt

TI__Genius 9600 points

Hi Adarsh,

Yes DRV601 would be good for this application if you would like to use the PCM5102A DAC. If you would like to just use a single chip though, you could use the TAD5242 DAC and directly drive the headphone in line out configuration.

Regards,
Sydney Northcutt

0 Adarsh Hegde 20 days ago in reply to Sydney Northcutt

Prodigy 90 points

Hi Sydney,

Sure will check TAD5242, meanwhile we are looking for a device which has a min 5.5 Vpk-pk and need single end signal to be swinging between 5.5V to 0V is there any device which you can recommend?

0 Sydney Northcutt 20 days ago in reply to Adarsh Hegde

TI__Genius 9600 points

Hi Adarsh,

Other than DRV601 I recommend looking into DRV603. This device has a higher input voltage so it can output ~5.5Vpk-pk max. This device has ground referenced architecture though, so the output is centered around GND not VDD/2. This was done to avoid needing dc blocking caps on the output.

Regards,
Sydney Northcutt

0 Adarsh Hegde 1 day ago in reply to Sydney Northcutt

Prodigy 90 points

Thank you Sydney, currently we are planning to use DRV601, but will explore DRV603.

0 Adarsh Hegde 1 day ago in reply to Adarsh Hegde

Prodigy 90 points

Hi Sydney,

I have follow up question, the application we are talking here is for aerospace. Hence we need to comply with lightning requirement, say here we need to meet Waveform 3 level 3, if this is the case what kind of protection you would recommend? in most of our cases we use TVS diodes, here since we are trying keep the transient below absolute max rating, if you recommend any protection type we can explore.

Thanks

Adarsh K Hegde

0 Sydney Northcutt 1 day ago in reply to Adarsh Hegde

TI__Genius 9600 points

Hi Adarsh,

Yes, for protection here I would recommend TVS diodes as well. Please ensure that the breakdown voltage and power rating of the diode is selected above the max output of the audio driver in your application.

Regards,
Sydney Northcutt

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DRV601: Using DRV601 line drive to drive 600 ohm speaker