Texas Instruments provides a recommended layout and routing guide in the ADS8904BRGETEVM evaluation module documentation. It's essential to follow these guidelines to ensure optimal performance, minimize noise, and reduce electromagnetic interference (EMI).
To handle the high-speed digital outputs, use a low-skew, low-jitter clock signal, and ensure that the receiving device can handle the output data rate. Additionally, use a proper termination scheme, such as a 50-ohm termination resistor, to minimize signal reflections and ensure signal integrity.
Use a low-pass filter with a cutoff frequency below the Nyquist frequency (half the sampling rate) to remove high-frequency noise and aliasing. A 4th-order or higher Butterworth filter is recommended. The filter should be designed to minimize group delay and amplitude distortion.
Use a multi-layer decoupling scheme with a combination of ceramic and electrolytic capacitors. Place a 100-nF ceramic capacitor close to the device's power pins, and add a 10-uF electrolytic capacitor in parallel. Ensure that the power supply voltage is within the recommended range (2.7V to 3.6V) and that the supply noise is minimized.
Use a high-quality, low-jitter clock source, such as a crystal oscillator or a phase-locked loop (PLL) clock generator. The clock frequency should be within the recommended range (10 MHz to 40 MHz), and the clock signal should be properly terminated and filtered to minimize noise and jitter.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
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