AD1941 clock frequency at I²S output (serial data I/O ports)
Hello,
I would like to use the Sigma DSP AD1941 to equalize music. But I have to know which clock frequency has got the I²S port (serial data I/O port) because I want to transmit the music via FM-Transmitter to a car-radio. The FM-Transmitter input must have a minimum clock frequency of 2 MHz.
I have looked through the datasheet but I cannot find the clock frequency of the I²S output. So I hope you can help me.
Thank you.
Kind regards
Sebastian
Audio Signal Processors
dsp
ad1941
i2s
clock_frequency
equalization
SigmaDSP Audio Processors
frequency
audio
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Sebastian,
The clock frequency is not fixed. It is dependent on:
The audio sampling rate
The number of bit clock cycles per channel (typically 32)
The number of channels per frame (typically 2, but could be 4, 8, or 16)
For a typical 48 kHz, 32 cycles per channel, stereo signal, the bit clock frequency would be:
48000 Hz × 32 cycles × 2 channels =
3.072 MHz
Are you sure the FM transmitter has an I2S-compatible serial port?
Hello BrettG,
Yes the FM-Transmitter has an I2S compatible serial port.
Thank you for your answer it is very helpful.
Kind regards
Sebastian
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