The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures proper operation and prevents damage to the device.
The DAC7742Y/250 has a rail-to-rail output stage, which means the output voltage range is from VSS (typically 0V) to VCC (typically 5V). However, it's recommended to limit the output voltage range to ensure the output amplifier remains in its linear region. Typically, this means limiting the output voltage to VCC - 0.5V to VSS + 0.5V.
Clock jitter can affect the DAC's performance by introducing noise and distortion in the output signal. It's recommended to use a low-jitter clock source and to keep the clock signal path as short as possible to minimize jitter. Additionally, the DAC7742Y/250 has a built-in clock jitter attenuator that can help reduce the effects of clock jitter.
To implement a bipolar output voltage range, you can use an external op-amp to invert and scale the output voltage. For example, you can use an op-amp in an inverting configuration with a gain of -1 to invert the output voltage, and then add an offset voltage to shift the output voltage range to the desired bipolar range.
It's recommended to keep the analog and digital signal paths separate and to use a star-ground configuration to minimize noise and crosstalk. The analog signals should be routed close to the analog ground plane, while the digital signals should be routed close to the digital ground plane. Additionally, it's recommended to use a solid ground plane and to avoid routing signals under the device's pins.
DAC7742Y/250 datasheet
by Texas Instruments
