A good PCB layout for the LM98722 involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the power supply. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure proper powering and decoupling, use a high-quality power supply with low ripple and noise. Add decoupling capacitors (e.g., 10uF and 100nF) close to the device's power pins, and use a 1uF capacitor on the VREF pin. Also, ensure the power supply can provide the required current.
The recommended clock frequency for the LM98722 is between 10 kHz and 100 kHz. However, the device can operate up to 200 kHz, but with reduced performance. It's essential to choose a clock frequency that balances performance and power consumption.
To optimize noise performance, use a low-noise power supply, and ensure the device is properly decoupled. Additionally, use a low-pass filter on the input signal, and consider using a shielded enclosure to reduce electromagnetic interference (EMI).
The maximum input voltage range for the LM98722 is ±10V. However, the device can operate with input voltages up to ±12V, but with reduced performance and accuracy.
LM98722CCMT/NOPB datasheet
by Texas Instruments
Findchips
