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TLV320AIC1103: Maximum input and output signal amplitude

Part Number: TLV320AIC1103
Other Parts Discussed in Thread: TLV320AIC3104, TLV320AIC1106

Hello support team,

I have some questions about TLV320AIC1103.

The customer's terms of use are as follows.
Power supply: 3 V
Analog input signal: single end 1 channel (MIC 1 P: fixed, MIC 1 N: analog input)
Analog output signal: single end 1 channel (EAR 2 O)


(1) Is the maximum single-end input amplitude that can be input to each terminals of MIC1P, MIC1N, MIC2P and MIC2N 124 mVpp?
I think so because specification value of "Overload-signal level (3 dBm0)" on page 9 of the data sheet is 248 mVpp (differential). Is my understanding correct?

(2) What is the maximum single-end output amplitude that can be output from each terminals of EAR1OP, EAR1ON and EAR2O?
Regarding EAR1OP and EARON, I think their amplitude are 2.47 Vpp as calculated result, because specification value of "Earphone AMP 1 output power (32 Ω load, 3 dBm0 output)" on page 8 of the data sheet is 95.1 mW.
And regarding EAR2O, I think its amplitude is 1.79 Vpp because specification value of "Earphone AMP 2 output power (32 Ω load, 3 dBm0 output)" is 12.5 mW.

(3) What is the dynamic range (maximum allowable amplitude) of each blocks of "TX Filter and PGA", "RX Volume Control" and "RX Filter and PGA"? The customer wants to know wheather the signal comes to saturate or not if he increases the gain of these block.

(4) What is the signal amplitude in mVpp for 1 LSB in case that the power supply voltage is 3 V and the operation is at in Linear mode?

Best regards,
M. Tachibana

  • Hi, Tachibana-san,

    My colleague is currently looking at your question, he will get back to you as soon as possible. I would like to add that the 'AIC1103 is a quite old device and it might be complicated to get all the information requested. Also, we have newer codecs with better overall performance and price, like the TLV320AIC3104, do you have more information about the reason of the interest on the 'AIC1103?.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • Hello Melendez-san,

    Thank you for the reply.

    Our customer has been using TLV320AIC1103 from the past
    This time, the customer is considering revising the board without substantially changing a design.
    So he seems to be gathering the information regarding TLV320AIC1103.

    Best regards,
    M. Tachibana

  • Tachibana-san,

    I expect the status of the TLV320AIC110x devices to change to NRND very soon. As diego mentioned, this is a very old device, and design support is non-existent. We recommend that your customer consider other devices such as the TLV320AIC3104, which is a far superior device.

    best regards,
  • Hello Steve-san,

    Thank you for your reply.

    I understood the status of TLV320AIC1106.
    And I'll recommend TLV320AIC3104 to our customer.
    I think the customer will reconsider the PCM codec device.

    Best regards,
    M. Tachibana