JAJSF44D March 2014 – March 2018 PCM1860 , PCM1861 , PCM1862 , PCM1863 , PCM1864 , PCM1865
PRODUCTION DATA.
All mixer gain coefficients are 24-bit coefficients using a 4.20 number format. Numbers formatted as 4.20 numbers have 4 bits to the left of the binary point and 20 bits to the right of the binary point.
The most significant bit of the 4.20 number format is the sine bit. It is used, as part of a two's complement number to invert the phase of that mixer input.
See SLAC663 for a calculator to convert from dB to the hexadecimal coefficient required.