DAC8760IPWPR datasheet(29/63 Pages) TI1

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CODE

IOUT

16mA •

4mA

CODE

IOUT

24mA •

CODE

IOUT

20mA •

12-/16-BitBa_

DACBa_

RSET

IOUT

BOOST

AVDD

DAC7760, DAC8760

www.ti.com

SBAS528B – JUNE 2013 – REVISED JUNE 2016

Product Folder Links: DAC7760 DAC8760

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Figure 84. Current Output

Resistor RSET (used to convert the DAC voltage to current) determines the stability of the output current over

temperature. If desired, an external, low-drift, precision 15-kΩ resistor can be connected to the ISET-R pin and

used instead of the internal RSET resistor.

For a 5-V reference, the output can be expressed as shown in Equation 3 through Equation 5.

For a 0-mA to 20-mA output range:

(3)

For a 0-mA to 24-mA output range:

(4)

For a 4-mA to 20-mA output range:

where

•

CODE is the decimal equivalent of the code loaded to the DAC.

•

N is the bits of resolution; 16 for DAC8760 and 12 for DAC7760.

(5)

The current-output range is normally set according to the value of the RANGE bits in the Control Register. When

both the voltage and current outputs are enabled in dual-output mode, the range is set by the IOUT RANGE bits

in the Configuration Register. See Setting Voltage and Current Output Ranges for more details. For more details

on controlling the current output when both the VOUT and IOUT pins are simultaneously enabled, see

Controlling the VOUT and IOUT Pins.

8.3.4 Internal Reference

The DACx760 includes an integrated 5-V reference with a buffered output (REFOUT) capable of driving up to

5 mA (source or sink) with an initial accuracy of ±5 mV (maximum) and a temperature drift coefficient of 10

ppm/°C (maximum).

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