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driver

Category: Hardware
Product Number: ssm2603

When i use this chip of SSM2603,I successfully configured this chip through IIC interface,but When I give a fixed value to the pin of PBDAT, the pin output is a fixed 1.7V voltage, and even if I change the input value, the output analog voltage does not change. The MCLK is 12.288MHz,and the sample rate is 48KHz,and the BCLK=MCLK/4.   

Why?

  • Hello AXI,

    Are you hearing audio when you send audio to the part?

    What are the fixed values you are sending?

    Are you sending 0x0000 and then 0xFFFF? I have seen people do that thinking it is a max positive and negative but it is not. The difference between those two numbers is only one bit of voltage. So it would be 3.3V/2^23 which is a very small number very much into the noise floor. 

    The digital input is a 2's compliment number and the output goes positive and negative from the common mode voltage of around AVDD/2 which is going to be around 1.65V

    Dave T