Figure 3-2. Dac63004Wcsp-Evm High Current Output Stage Block Diagram; Figure 3-3. Dac63004Wcsp-Evm Optional Current Source Circuit Layout - Texas Instruments DAC63004WCSP-EVM User Manual

www.ti.com
3.1.1.2 Optional Current Source Circuitry
The DAC63004WCSP-EVM has optional, nonpopulated components that can be used to evaluate the
DACx3004W with external FemtoFET MOSFETs for high current source applications in a small, 4 mm × 4
mm area.
Figure 3-2 shows the block diagram for the optional circuit. The DACx3004W is a four channel device, so there
are up to four high current outputs available with the optional circuitry. 3-Ω R
example. This circuit can achieve a current of 200 mA when the DAC outputs are set to 0.6 V. The R
used in this example are size 0603 with a power rating of 0.33 W. Larger resistors can be used to achieve a
higher power rating which allows for a higher current output.

Figure 3-2. DAC63004WCSP-EVM High Current Output Stage Block Diagram

Figure 3-3 is a snip of the 4-mm × 4-mm high current output stage layout. The layout consists of the
DACx3004W, four FemtoFET MOSFETs, and four size-0603 resistors. The DAC63004WCSP-EVM has
footprints for 0805 resistors that are not a part of the example layout so that larger resistors can also be
evaluated with the DAC63004WCSP-EVM.

Figure 3-3. DAC63004WCSP-EVM Optional Current Source Circuit Layout

Remove R5, R6, R7, and R8 on the DAC63004WCSP-EVM to disconnect the DAC_OUTx and DAC_FBx pins
before populating the optional components for the high current output stage.
SLAU879 – DECEMBER 2022
Submit Document Feedback
VDD
VDD
DACx3004W OUTx
FBx
GND
1
Copyright © 2022 Texas Instruments Incorporated
resistors are used in this
SET
IOUTx
R
SET
DAC63004WCSP-EVM User's Guide
Detailed Description
resistors
SET
9