Datasheet

DAC0830, DAC0832
www.ti.com SNAS534B –MAY 1999–REVISED MARCH 2013
Figure 34. Two Terminal Floating 4 to 20 mA Current Loop Controller
• DAC0830 linearly controls the current flow from the input terminal to the output terminal to be 4 mA (for D=0)
to 19.94 mA (for D=255).
• Circuit operates with a terminal voltage differential of 16V to 55V.
• P
2
adjusts the magnitude of the output current and P
1
adjusts the zero to full scale range of output current.
• Digital inputs can be supplied from a processor using opto isolators on each input or the DAC latches can
flow-through (connect control lines to pins 3 and 10 of the DAC) and the input data can be set by SPST
toggle switches to ground (pins 3 and 10).
Figure 35. DAC Controlled Exponential Time Response
• Output responds exponentially to input changes and automatically stops when V
OUT
=V
IN
• Output time constant is directly proportional to the DAC input code and capacitor C
• Input voltage must be positive (See Using the DAC0830 in a Voltage Switching Configuration
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