Texas Instruments recommends a star-ground connection, with the analog and digital grounds separated and connected at a single point. Additionally, keep the analog and digital signal traces separate and avoid running them parallel to each other. Use a solid ground plane and decouple the power supply with a 0.1uF capacitor.
Use a buffer amplifier or an op-amp with a low output impedance to drive the TLC5602CDWR's input. Alternatively, add a series resistor (e.g., 1kΩ) and a capacitor (e.g., 10nF) in parallel to the input signal to form a low-pass filter, which helps to reduce signal attenuation.
The TLC5602CDWR can operate with clock frequencies up to 30 MHz. However, the maximum clock frequency may be limited by the specific application and the quality of the clock signal. It's recommended to consult the datasheet and application notes for specific guidance.
Use a high-quality, low-noise power supply and decouple the VCC pin with a 0.1uF capacitor. Additionally, ensure that the internal reference voltage is allowed to settle for at least 10ms after power-up before starting conversions. You can also use an external reference voltage if required.
Use the TLC5602CDWR's SYNC pin to synchronize conversions with an external clock or trigger signal. The SYNC pin can be connected to an external clock signal or a trigger signal, and the TLC5602CDWR will start a new conversion on the rising edge of the SYNC signal.