DAC0830 datasheet(21/29 Pages) TI

21 / 29 page

DAC0830, DAC0832

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SNAS534B – MAY 1999 – REVISED MARCH 2013

Figure 34. Two Terminal Floating 4 to 20 mA Current Loop Controller

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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).

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Circuit operates with a terminal voltage differential of 16V to 55V.

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P2 adjusts the magnitude of the output current and P1 adjusts the zero to full scale range of output current.

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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

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Output responds exponentially to input changes and automatically stops when VOUT=VIN

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Output time constant is directly proportional to the DAC input code and capacitor C

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Input voltage must be positive (See Using the DAC0830 in a Voltage Switching Configuration

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DAC0830 Datasheet(PDF) 21 Page - Texas Instruments