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  • PCM1791A: Not possible to use I2C for control, and stereo, and external digital filter mode?

    TI Thinks Resolved
    Part Number: PCM1791A When using I2C, if you enable external digital filter mode, the PCM1791A sets the MONO bit automatically. I am guessing this is because the MUTE pin (which would be DATAR when external digital filter mode is enabled) is used as A1…

  • PCM1791A: external digital filter mode + mono doesn't seem to work correctly

    Part Number: PCM1791A Some background info: Clock @ LRCK pin = 744.192kHz Clock @ BCK & SCK pins = 23.814MHz (32xFS) Output circuit set up for mono mode (like Figure 37) MUTE pin (DATA-R when in mono mode) is grounded Data on DATA pin looks like…

  • PCM1791A: Monaural mode selection

    Part Number: PCM1791A Hi Please tell me the correct algorithm for seting the PCM1791A by I2S to Monaural mode PCM1791A. I tried to do the following: reset PCM1791A by I2S set OPE bit "1" (Register 19, DAC operation control) set MONO bit "1" (Register…
    • Answered

  • PCM1791A: sampling frequency setting

    Resolved
    Part Number: PCM1791A Hello experts, I have question about sampling frequency. Is sampling frequency decided by input clock to LRCK automatically? In other words, there is no register for sampling frequency? Thanks and best regards, Ryo Akashi
    • Resolved
    • Answered

  • PCM1791A: VCOM Capacitors

    Resolved
    Part Number: PCM1791A Other Parts Discussed in Thread: DSD1791 Hi, According to PCM791A data sheet, I found that it is recommended to add a 1uF chemical capacitor between VCOM and GND. For a 1uF capacitor, is it possible to use a 1uF ceramic instead of…
    • Resolved
    • Answered

  • PCM1791A: Handling Unused Pins

    Resolved
    Part Number: PCM1791A Hi, Could you please tell me how to handle the following unused pins? Q1. MDO, ZEROL and ZEROR Is my understanding correct that the unused pins for MDO, ZEROL and ZEROR can be kept floating since those are the output pins? Q2. M…
    • Resolved

  • PCM1791A: SCK requirement at TDM mode

    TI Thinks Resolved
    Part Number: PCM1791A Hello, Our customer plans to stuff 6pcs of PCM1791A at TDMCA mode. In that case BCK become 256fs, can they use 128fs SCK input? It looks like very tough situation that DAC System clock is slower than inputted TDM BCK cycle. On the…

  • Potential Hardware bug in PCM1791A / Digital attenuation not working when DAC ouputting noise

    Other Parts Discussed in Thread: PCM1791A Hi TI, We've found a strange behavior that can cause the PCM1791A to output digital noise (sound like an airplane), and in this "state", the Digital attenuation control is not not working. We're…
    • Answered

  • PCM1791A audio DAC Delta-Sigma Oversampling Rate Selection Question

    Resolved
    Other Parts Discussed in Thread: PCM1791A Dear TI audio IC designers, 1. What is the PCM1791A IC Delta-Sigma Minimum Oversampling Rate can you recommend for the following IC conditions and preserve high IC performance?: Sampling frequency is fs=44.1kHz. …
    • Resolved
    • Answered

  • AM3352: TDM output

    Resolved
    Part Number: AM3352 Other Parts Discussed in Thread: PCM1791A , Hi, Our customer wants to do TDM output from AM3352 using PCM1791A. It is called TDMCA in the PCM1791A specifications and seems to be different from the TDM output of AM3352 (CMD and LRCK timing…
    • Resolved

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