Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. Use short, direct traces for the analog output and reference voltage, and avoid running digital signals near the analog output. Additionally, use a low-ESR capacitor for the output filter and decouple the power supply pins.
To configure the DAC7574IDGSRG4 for bipolar output operation, connect the output amplifier's negative input to the DAC output, and the positive input to a reference voltage (e.g., VREF). Set the DAC's output range to 2x the desired output voltage, and use an external amplifier to scale and offset the output signal. Consult the datasheet and application notes for specific configuration details.
The maximum output current of the DAC7574IDGSRG4 is 5mA. Exceeding this current limit can cause the output voltage to droop, affecting accuracy. To maintain accuracy, ensure the output current is within the specified limit, and consider using an external buffer amplifier if higher currents are required.
A voltage reference is required for the DAC7574IDGSRG4 to establish the output voltage range. Texas Instruments recommends using a low-noise, low-drift voltage reference, such as the REF5025 or REF3020. A simple voltage reference circuit can be implemented using a voltage divider and a buffer amplifier. Consult the datasheet and application notes for specific circuit configurations.
The DAC7574IDGSRG4's performance is affected by temperature, with a typical temperature coefficient of ±1ppm/°C. To compensate for temperature drift, use a temperature-compensated voltage reference, and consider using a thermistor or temperature sensor to monitor the temperature. Apply temperature correction using software or hardware compensation techniques.
DAC7574IDGSRG4 datasheet
by Texas Instruments
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