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  • LM49450: constant component at the HP outputs

    Resolved
    Part Number: LM49450 Hi. I have constant positive voltage at the outputs HPL and HPR. ChargePump frequency 323375 Hz (measured on C1N), CPVdd and HPVdd - 2.5V, IOVdd, DVdd, Vdd, LSVdd - 3.3V. On HPVss i have +0.4V. What voltages should be at such power…
    • Resolved
    • Answered

  • LM49450: Asking for the LM49450 no output issues

    Resolved
    Part Number: LM49450 Other Parts Discussed in Thread: PCM5100 Hi Team, Cusotmer uses LM49450 and cusotmer found there is no output at the headphone. On the I2S bus, there is also PCM5100 DAC. PCM5100 can output signal normal. So, cusotmer think I2S is…
    • Resolved

  • LM49450: Asking for PCM5100A and LM49450 can meet the cusotmer design spec

    TI Thinks Resolved
    Part Number: LM49450 Other Parts Discussed in Thread: PCM5100A Hi Team, Customer would like to evaluate PCM5100A and LM49450 for their new product. Could you please help confirm PCM5100A and LM49450 can uspport the spec without problem? Here are the customer…

  • LM49450: Asking for the LM49450 power sequence recommendation

    Part Number: LM49450 Hi Team, Customer uses LM49450. They found the pop noise on the headphone while AC ON/OFF. Do you have the recommended power sequence for the LM49450? Thanks, SHH

  • LM49450: Asking for the LM49450 pop performacne spec

    Part Number: LM49450 Hi Team, Can LM49450 meet the following spec from IC side for customer request? Please exclude the system design aspect. Headphone out level 300mV/32Ω, pop noise<-60dB Thanks, SHH

  • LM49450: VCC_IO33V and VCC_LVS5V is short circuit when we using the LM49450

    Part Number: LM49450 Dear, We found the VCC_IO33V and VCC_LVS5V is short circuit when we using the LM49450 in the PCBA .Which will lead to MCU overvoltage and the mcu can't work normal. PS: The ripple of he VCC_IO33V and VCC_LVS5V is normal …

  • LM49450: Output noise problem

    Part Number: LM49450 Dear Team: My client uses lm49450 to design audio output, but headhone has noise. What is the likely cause, and what should I pay attention to when designing?

  • LM49450: How is the analog line input mixed/activated/switched with the I2S digital input?

    Part Number: LM49450 Other Parts Discussed in Thread: TLV320DAC3101 , TLV320DAC3100 , TAS2505 Hi, We are designing a robot control board, and LM49450 seems a really good fit for our purpose. Understands from other posts that this pre-NS-chip is less supported…
    • Answered

  • LM49450: Is this product still supported for new projects?

    Resolved
    Part Number: LM49450 Other Parts Discussed in Thread: TLV320AIC3212 , TLV320AIC3110 The LM49450 is clearly an older part from National. It has a unique set of integrated features (I2S input + Headphone amp + stereo amp + HP sense) that I need in my design…
    • Resolved

  • LM49450 DAC Compensation Filter as an Audio Equalizer

    Greetings everyone, i am new at the forum´s and i require help with this component. I am building a prototype for my thesis that requires an audio equalizer sequence and i think this model suits me for the proyect, but i got some issues trying to…

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