Cotek AD-1500 - Pmbus Data Format

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2-5. PMBus Data Format
The module receives and reports data in LINEAR format.
The Linear Data Format is typically used for commanding and reporting the
parameters such as (but not only) the following:
Output Current,
Input Voltage,
Output Voltage,
Operating Temperatures,
The Linear Data Format is a two bytes value with:
An 11 bit, two’s complement mantissa and
A 5 bit, two’s complement exponent (scaling factor).
The format of the two data bytes is illustrated below:
The relation between Y, N and the “real world” value is:
X = Y·2N
Where, as described above:
X is the “real world” value;
Y is an 11 bit, two’s complement integer; and N is a 5 bit, two’s complement integer.
Devices that use the Linear format must accept and be able to process any value of N.
The Exponent of the data words is fixed at a reasonable value for the command.