BU2508FV_11 Datasheet, PDF (3/9 Pages) Rohm – High-precision 10bit 4ch/6ch D/A Converters

BU2508FV,BU2507FV
Technical Note
●DAC Variable Output Range Function
With the variable output range function, the upper / lower limits of the output voltage as well as the power supply voltage can be set.
The upper limit value setting terminal VrefH is used as the power supply terminal, while the lower limit value setting terminal
VrefL is used as the GND terminal (1LSB ≒ 5mV). In the example below, VrefH = 3.5V / VrefL = 1.5V. Further adjustments
can be made in order to achieve greater accuracy (1LSB ≒ 2mV).
VOUT
5V
0V
VOUT
5V
3.5V
1024
スsテteッp プ
1.5V
0V
3FFh Input Code
1024
スsテteッp プ
VrefH
VrefL
3FFh Input Code
1LSB≒5.0mV
●Block Diagrams
BU2507FV
1LSB≒2.0mV
BU2508FV
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2011.08 - Rev.C