Byte Question

[krispiekream]

1V = 0x03 33

Signal Name : LEFT_TH
DAC value: 0x03 33
Command Msg: 0x00 00 00 03 33 00 00 0

COMMAND MSG CONTENT
Standard Format
Msg Content
Byte 7 =
Byte 6 =
Byte 5 =
Byte 4 =
Byte 3 =
Byte 2 =
Operate Bit# (O.B. #)
Byte 1 = Instruction Byte 1
Byte 0 = Instruction Byte 0

how do you get 1V = 0x03 33, is there a table i can look at or how do they arrive this?
thanks

 

[betwixt]

Normally the voltage is the DAC value 0x0333 multiplied by the step size. The step size itself is usually the reference voltage divided by the resolution. What we need to answer your question is what the reference voltage is and what resolution (8-bit, 10-bit, 12-bits etc.) the DAC is.

Is this a discrete DAC device or embedded in a larger design?

Brian.

 

[krispiekream]

this is an 8-bit DAC

 

[KlausST]

Hi,

0x03 33 is more than 8 bits. It still uses 10 bits. And I´ve never seen an 8 bit DAC with an 8 byte framed interface.

--> we need to know the context. Part number, data sheet link, schematic, reference voltage, communication protocol... and so on.

Klaus