Hello,
I am using the old DAC8800 8 Channel DAC on a project, its pretty basic where I pass an 8 bit value to channel 1 of the DAC8800
The problem I have discovered is the ladder inside the chip appears to be incorrectly built.
Ie.
V1RH, V2RH, VDD set to 12v
V1RL, V2RL,/CLK, VSS set to 0V
/CLR set to +5v
SDI Data in
Clk Data In
Load on completion
Address 000 = Channel 1
Data 255 = 10.86v
Data 254 = 10.67v
Data 253 = 10.73v - Voltage goes up
Data 252 = 10.46v
Data 251 = 10.61v - Voltage goes up
Data 250 = 9.90v
Data 249 = 10.14v - Voltage goes up
This appears to continue until we are less than decimal 64
To verify that my software is correct, I setup a breadboard with switches to manually verify this and the results were the same.
Any ideas??
Darren
The chips is labelled
DAC8800
F#0904
P1585598.1