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Part Number: TPA6141A2
Dear Technical Support Team,
I'd like to confirm the RF noise filter of TPA6141A2's output urgently.
Our customer is launching mass production.
They are designing the Bluetooth speaker and it can connect an earphone cable with TPA6141A2.
When connecting an earphone cable to jack, approximately 150MHz RF noise affects TPA6141A2 through earphone cable.
To prevent this RF noise, 1000pF capacitors are set on OUTL and OUTR.
Could you see the attached file?
1.) Do you have a solution to reduce RF noise through earphone cable?
2.) Is 1000pF OK to reduce RF noise? I'm concern an oscillation of headphone AMP.
The datasheet doesn't show capacitive load specification.
3.) Is it better to set the sunber circuit(C and R) on OUTR and OUTL?
if possible , could you show the value of C and R for sunber circuit.
In reply to Ivan Salazar:
In reply to ttd:
In reply to Mochi:
In the case of TPA4411 datasheet, we can find the specification as "Maximum capacitive load 400PF" .
What about TPA614x family's capacitive load drivability specification?
Capacitive load is not specified in TPA614x data sheet. Perhaps this was not documented during characterization.However I found an old report of stability on TPA6140A2 that could be helpfull. Please find attached document.
Best regards,-Ivan SalazarAudio Applications Engineer - Low Power Audio & Actuators
Thank you very much for your information,
It will help to get some idea from my customer.
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