Texas Instruments recommends a star-ground configuration, with the REF3212AIDBVTG4 placed close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC) it is supplying. The device should be surrounded by a ground plane, and the input and output traces should be kept short and away from noise sources.
To ensure stability, the REF3212AIDBVTG4 requires a minimum capacitance of 10nF between the output pin and ground. Additionally, the device should be decoupled from the power supply with a 10uF capacitor, and the input voltage should be filtered with a 1uF capacitor.
The thermal resistance of the REF3212AIDBVTG4 is 34.4°C/W. This means that the device can dissipate up to 500mW of power without exceeding its maximum operating temperature. Engineers should ensure that the device is properly heat-sinked and that the ambient temperature is within the recommended operating range.
Yes, the REF3212AIDBVTG4 can be used in a system with multiple voltage rails. However, the device's input voltage should be within the recommended range of 4.5V to 18V, and the output voltage should be decoupled from the input voltage with a capacitor to prevent noise coupling.
During power-up, the REF3212AIDBVTG4 has a soft-start feature that prevents output voltage overshoot. During power-down, the device's output voltage decays slowly to prevent voltage spikes. Engineers should ensure that the power-up and power-down sequences are slow enough to prevent voltage transients that could affect system performance.
REF3212AIDBVTG4 datasheet
by Texas Instruments
