https://e2e.ti.com/support/audio-group/audio/<p style="display:none;">blank</p>en-USTelligent Community 13https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663039/tpa3118d2-please-review-the-schematic-of-tpa3118d2/6413008Sat, 11 Jul 2026 00:58:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0ae708dd-1be1-492b-8b7d-6cb3284ef57fShenghao DingOur expert will feedback you next working day.https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1661759/tpa6203a1-start-up-time/6412900Fri, 10 Jul 2026 21:21:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:82bba574-571e-4fd1-b6a0-e6914a074208Isaac BulivaShuji, The input network would effect RC time constant, as the system would need to wait for the RC to charge before enabling the device. The typical application for this device doesn&#39;t have any external components connected to the output, is anything else connected here? What is the startup delay when you use the higher volume during power up? Is this happening at a specific input level. The bypass cap is not required and is included to improve the power supply rejection ratio, you could remove it to see if there is any improvement for startup time. The typical value for C-bypass = 0.22&#181;F is shown in the datasheet as well as the EVM for this device. Regards, Isaachttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663292/tlv320aic3104evm-k-audio-leakage-between-left-and-right-handset-mics/6412865Fri, 10 Jul 2026 20:46:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3485cfda-d338-475e-a1d9-1e4a0525fa40Stephen KerteszThanks Jeff. We&#39;ll re-sequence and let you know. An aside, is it just me or is it more difficult to login to the forum to reply to posts now? Firefox and Edge, multiple attempts resulted in failed logins. Stevehttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1662996/tsc2013-q1-clear-pen-status-after-touch-and-conversion/6412863Fri, 10 Jul 2026 20:43:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:30c00542-17c3-4d6f-b2c4-fe9f5768b6ccJeff McPhersonHi Allan, Is your system following section 7.4.2 in the datasheet? This describes the system flow to process a touch command. This should be completed before the status bit will clear. Best regards, Jeff McPhersonhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663158/tpa3123d2-tpa3123d2-output-phase-inversion-in-single-ended-configuration/6412837Fri, 10 Jul 2026 20:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e1a66e10-8473-4033-a05d-489cc389ddc0Isaac BulivaHi Takahiro, Gain/Phase vs Frequency plots are published in the datasheet for this device, you can reference the plot that matches your configuration. Regards, Isaachttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663211/adc6140evm-pdk-is-it-possible-to-pilot-the-ac-mb-with-some-source-code/6412824Fri, 10 Jul 2026 20:19:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0985eab1-5b66-4c57-92e6-3f1d2053403bJeff McPhersonHi, Unfortunately no API exists for PPC3. If you want to pilot the EVM externally, you can do so by using an I2C host of your choice and connecting to the I2C connections on the EVM (either the AC-MB test points or the EVM test points). Best regards, Jeff McPhersonhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663292/tlv320aic3104evm-k-audio-leakage-between-left-and-right-handset-mics/6412820Fri, 10 Jul 2026 20:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0e3f03db-d90d-4f57-b21c-620b17c63343Jeff McPhersonHi Stephen, It&#39;s not recommended to change ADC filter coefficients while the ADC is already running. Can you sequence the code such that all powerups/unmutes are at the end? Thank you, Jeff McPhersonhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1661638/pcm6260-q1-input-protection-and-of-power-behaviour-of-pcm-6xx0/6412813Fri, 10 Jul 2026 20:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c4bbc003-ce1f-46ca-9ce5-2c072ec71897Jeff McPhersonHi Jan, Daveon is out of office so I am chiming in. I discussed this with one of our designers as well. If a negative voltage is applied to the input pin, the ESD protection diode will kick in and clamp the signal. This diode is meant to handle a beating so immediate damage is not a concern. However the device isn&#39;t qualified to operate with a regular negative input voltage. So if you have the ability to ensure that signal is not applied while the device is off, that is TI&#39;s recommendation. When the device is powered off the input is high-z. You shouldn&#39;t worry about injection current hurting the device as long as the voltage limit is honored. Best regards, Jeff McPhersonhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1662798/tpa2012d2-tpa2012d2rtjtg4-no-output-despite-valid-1khz-input-signal-and-sd-pins-correctly-driven/6412809Fri, 10 Jul 2026 20:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c51974d6-4cb9-46f5-89d5-3227bb18b4ccIsaac BulivaHi Sajjid, Yes, you should use the same capacitance as the left channel to terminate the right channel and terminate it to ground to ensure that the impedance seen by each input is the same. If the corner frequency is within the audio band, the capacitors should have a tolerance of &#177;10% or better, because any mismatch in capacitance causes an impedance mismatch at the corner frequency and below. Also ensure that the input ground is referenced to the audio source ground, since the audio signal is coming from the CODEC it should be referenced to the same ground as that device. What is the speaker impedance? What is the amplitude of the 1kHz input signal? Have you also confirmed that PVDD is being supplied to the device by measuring the pins directly at the device? Regards, Isaachttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1660532/tpa3255-speaker-output-distortion-when-power-more-than100-watts/6412753Fri, 10 Jul 2026 19:05:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0b2ee3ce-c89e-4b6a-8f51-5ccea4534d5fIsaac BulivaTaweewong, For Fault pin errors, table 2 and table 5 below from the datasheet will help to identify the issue. Regards, Isaachttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1660620/tlv320aic3100-the-device-is-not-working-when-we-adjust-the-volume-to-maximum/6412717Fri, 10 Jul 2026 18:30:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:16b76b6c-b2d0-4da2-b656-1b6d3416c89fMir JeffresHi Justin, Do you have a better picture of the schematic? I am confused why you have micbias connected to HPL. Is the no output issue on the headphone outputs as well as the speaker outputs? Can you provide the script you are using to configure the device as well as a register dump from a working device as well as a dump from a non-working device. If there is no register dump I cannot help further. Best, Mirhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663292/tlv320aic3104evm-k-audio-leakage-between-left-and-right-handset-micsFri, 10 Jul 2026 17:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e844ac9a-13f5-43e4-9500-7ba62970d677Stephen KerteszPart Number: TLV320AIC3104EVM-K Separate handsets (L and R), handset MICs connected to IN2L and IN2R mic inputs. Common bias voltage (2.5V) applied to each MIC thru MICBIAS and JMP10. 1kHz sine wave played thru external speaker, LEFT handset MIC at speaker, RIGHT handset out of speaker proximity. Apparent audio leakage from LEFT to RIGHT channel, see image. Codec config provided. ### CODEC 1 ################################################################ # CODEC 1 — TWO MONO HEADSETS ################################################################ # page zero, reset w 30 00 00 w 30 01 80 # BCLK -&gt; PLLCLK_IN and CLKDIV_IN w 30 66 A0 # PLL on, Q=2, P=1 w 30 03 91 # PLL J=32, D=0 w 30 04 80 # I2S flow: DACL=I2S_L, DACR=I2S_R w 30 07 0A # I2S 32-bit word length; use 0x20 for 24-bit w 30 09 30 ################################################################ # MICROPHONE SETUP ################################################################ # Mic bias (2.5VDC) w 30 19 80 # Headset0 mic: MIC2L -&gt; ADCL # Headset1 mic: MIC2R -&gt; ADCR w 30 11 0F w 30 12 F0 # ADC power on w 30 16 7C w 30 13 7C # PGA gain +12dB w 30 0F 18 w 30 10 18 ################################################################ # HEADPHONE OUT ################################################################ # DAC output switching: linked DAC volume behavior w 30 29 02 # DAC digital volume control set to 0dB w 30 2B 00 w 30 2C 00 # turn DAC on, HPLCOM=SE w 30 25 E0 # HPRCOM=SE w 30 26 10 # power up, unmute HPLOUT, HPROUT w 30 33 0D w 30 41 0D ################################################################ # VOLUME / ROUTING ################################################################ # Headset0: PGA_L + DAC_L1 -&gt; HPLOUT w 30 2E A4 w 30 2F 80 # Headset1: PGA_R + DAC_R1 -&gt; HPROUT w 30 3F A4 w 30 40 80 ################################################################ # ADC HPF ################################################################ # page one w 30 00 01 # Left channel HPF coeffs # N0=32768*e^(-2*PI*8/48000)=32734 w 30 41 7f w 30 42 DE # N1=-N0=-32734 w 30 43 80 w 30 44 22 # D1=N0=32734 w 30 45 7f w 30 46 DE # Right channel HPF coeffs # N0=32768*e^(-2*PI*8/48000)=32734 w 30 47 7f w 30 48 DE # N1=-N0=-32734 w 30 49 80 w 30 4A 22 # D1=N0=32734 w 30 4B 7f w 30 4C DE # page zero w 30 00 00 # HPF coeff select: Use programmable coeffs w 30 6B C0 # enable ADC HPF w 30 0C 50Datacom moduleTLV320AIC3104EVM-Khttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1662129/pcmd3140evm-pdk-ppc3-correct-app-for-pcmd3140/6412659Fri, 10 Jul 2026 17:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e1bebc37-e3b1-4968-b0ac-b39f1cf626a1Chris NielsenThe EVM is working great now. Thank you, Chrishttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1661310/tac5212-tac5212-differential-dac-output-not-working-on-both-channels/6412439Fri, 10 Jul 2026 14:25:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f937f267-5c92-4589-ab13-2029326e56c5Arash LoloeeHi Monica, Sorry for the inconvenience Here is the script that used and verified the Diff operation on both DAAC1 and DAC2: Regards, Arash # CHECKSUM 167 # Page 0 (0x00) Dump # Select page 0 w a0 00 00 w a0 7f 00 w a0 00 00 w a0 02 09 w a0 76 0c # Page 3 (0x03) Dump # Select page 3 w a0 00 03 w a0 38 12 w a0 39 28 w a0 3a 26 w a0 3b 20 w a0 3c 00 w a0 3d 00 w a0 3e 09 w a0 48 01 w a0 49 01 # Page 10 (0x0a) Dump # Select page 10 w a0 00 0a w a0 79 e6 w a0 7a 48 w a0 7b c6 w a0 7c 80 w a0 7d 19 w a0 7e b7 w a0 7f 3a # Page 11 (0x0b) Dump # Select page 11 w a0 00 0b w a0 08 7f w a0 09 cc w a0 0a 91 w a0 0b 8b # Page 17 (0x011) Dump # Select page 17 w a0 00 11 w a0 79 e6 w a0 7a 48 w a0 7b c6 w a0 7c 80 w a0 7d 19 w a0 7e b7 w a0 7f 3a # Page 18 (0x012) Dump # Select page 18 w a0 00 12 w a0 08 7f w a0 09 cc w a0 0a 91 w a0 0b 8b # Page 26 (0x01a) Dump # Select page 26 w a0 00 1a w a0 1e 00 w a0 3a 00 w a0 44 e0 w a0 45 00 w a0 46 00 w a0 47 00 # Page 27 (0x01b) Dump # Select page 27 w a0 00 1b w a0 66 01 w a0 67 90 w a0 7a 00 w a0 7b fa # Power up/down # Select page 0 w a0 00 00 w a0 78 40https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1661310/tac5212-tac5212-differential-dac-output-not-working-on-both-channels/6412345Fri, 10 Jul 2026 12:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:da5f2cf0-a1ee-404d-8cc7-a7c6dc9a5145Monica DHi Arash, Thank you for testing the configuration on the TAC5212 EVM and for sharing the register dump. I tried to open the attached &quot;TAD5212 Reg dump Diff.cfg&quot; file, but I am unable to access it. When I click on the attachment, I receive the following error: &quot;Forbidden – You don&#39;t have permission to access this resource.&quot; Could you please re-upload the .cfg file or share it in a different format (such as .txt , .zip , or by pasting the register dump directly in the reply)? I would like to compare your working register configuration with mine and verify any differences. Thank you for your support. Regards, Monicahttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1659122/tlv320adc5120-adc5120-register-access-problem/6412344Fri, 10 Jul 2026 12:52:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:af880acf-4ead-4464-959e-c868c580edc5Lakshmi Narasimhan BadrinarayananHi Jason, Let me have a look at these waveforms and get back to you by early next week. Thanks and Regards, Lakshmi Narasimhanhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1661759/tpa6203a1-start-up-time/6412335Fri, 10 Jul 2026 12:45:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ce9b3254-b7f0-4b12-bab9-edeaad8589d5Shuji IshiwataHi Isaac, I have an additional question. What is the recommended value for the bypass capacitor? Best Regards, Ishiwatahttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663211/adc6140evm-pdk-is-it-possible-to-pilot-the-ac-mb-with-some-source-codeFri, 10 Jul 2026 12:03:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a08dd6ed-425e-4e56-adc6-ae4af9ae2dd6Thibaut FUXPart Number: ADC6140EVM-PDK Hi, I would like to know if a C-code API (for exemple) exists in order to pilot the EVM without using the PPC3 gui? My purpose is to apply, using a third software, a specific configuration for the EVM For exemple : changing the input mode from balanced to unbalanced? Thank you Regards.ADC6140EVM-PDKhttps://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663158/tpa3123d2-tpa3123d2-output-phase-inversion-in-single-ended-configurationFri, 10 Jul 2026 09:34:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:bd8eeb1b-a945-4bed-80ea-2b254b90213eTakahiro FukudaPart Number: TPA3123D2 Hello, I am using the TPA3123D2 in a single-ended (SE) configuration, with speakers connected between R-OUT and GND, and between L-OUT and GND. I confirmed that both the R-OUT and L-OUT output signals are inverted by approximately 180 degrees with respect to the input signal. Is this phase inversion expected behavior for this IC, or is it part of the device specifications? Thank you TakahiroIndustrial AutomationTPA3123D2https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1663153/tsc2007-interrupt-stuck-active-after-power-onFri, 10 Jul 2026 09:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a8031433-eace-4395-aebd-e227b33fbf3cCorentin BonneauPart Number: TSC2007 Dear Support representative, We develop a system with a touchscreen and the TSC2007 touch screen. We faced in some rarely case (around 1/50), a loss of the touch screen after power ON. There is two other components on the I&#178;C bus (an RTC and a LED driver). Both correctly work, but not the touch screen. After further investigation, we sometimes obseve the IRQ signal stuck active, so the master continuously read the touch screen coordonate. A reboot of the Master not correcting the problem. Only a power on/off. Here you see the setup commande and the IRQ behavious in green. Question 1 : Is it a bad behaviour of the Linux driver to not send the setup command indicate in the datasheet 0xB0 (setup command) instead of 0x00 (asking to read Temp0) ? Following the topics already posted on the forum, we verified the power up sequence : The VDD ramp on were not follow datasheet recommandation (200&#181;s &gt; max 50&#181;s). So I made some change : This time the 29&#181;s in in the datasheet recommandation. But we still face the issue (near 150 try). I check the VDD ramp off, and the ramp is not good as well: 17ms largely &gt; to the 300&#181;s recommanding. Question 2 : assuming I can&#39;t change this ramp without redo a new design, the customer will not switching ON/OFF the system in a time below 0.5s which is far above the 17ms on our design. And the bug was found after a cold start. Is the VDD ramp off shall be imperatively respected ? Meaning that the internal capacitor shall be discharged fast enough nevertheless the 0.5s before another power ON ? Below is our schematic : Question 3 : Do you have some suggestion of improvments we can implemented/tested please ? I plan to had a load switch TPS22995H drived by our processor to restart the all I&#178;C components in case of bad behaviour for a new design. I&#39;m not convince the trouble is only on the VDD ramp off. But maybe I miss something. Many thanks for your help and have a good day. CorentinMedical &amp; healthcaretsc2007