JAJSQ25 march 2023 DAC53004W
PRODUCTION DATA
The DACx3004W can be used as a programmable current source using an external MOSFET for current values greater than 250 µA. The force-sense outputs of DACx3004W can be used to compensate for the gate-source voltage drop caused by temperature, drain current, and aging of the MOSFET. The GPIO pin can be used to switch the output current on or off without the need for run-time software. The slew between the on and off values can be programmed. Figure 8-1 shows how the DACx3004W is used as a programmable current source. A resistor, RSET, connected to the source of the MOSFET sets the output current range. This circuit can be used in optical modules that require a high current output with a small size.