A good PCB layout for the LMK04803BISQ/NOPB involves keeping the clock input traces as short as possible, using a solid ground plane, and minimizing the distance between the device and the clock source. Additionally, it's recommended to use a 4-layer PCB with a dedicated ground plane and to avoid routing signals under the device.
To ensure proper power and decoupling, use a low-ESR capacitor (e.g., 100nF) between VCC and GND, and a larger capacitor (e.g., 10uF) between VCC and GND for bulk decoupling. Also, ensure that the power supply is clean and well-regulated, and that the device is operated within its recommended operating conditions.
The recommended clock input signal for the LMK04803BISQ/NOPB is a differential clock signal with a frequency range of 10 MHz to 100 MHz, and an amplitude of 1.0 V to 1.4 V peak-to-peak. The clock signal should be clean and free of noise, and should be terminated with a 100-ohm differential termination resistor.
To configure the LMK04803BISQ/NOPB for a specific output frequency, use the device's internal PLL and divider circuits to generate the desired output frequency. The device's output frequency can be calculated using the formula: f_OUT = (f_IN x PLL_MULTIPLIER) / (DIVIDER x 2). The PLL_MULTIPLIER and DIVIDER values can be programmed using the device's control registers.
The maximum operating temperature range for the LMK04803BISQ/NOPB is -40°C to 85°C. However, the device's performance and accuracy may degrade at temperatures above 70°C, so it's recommended to operate the device within a temperature range of 0°C to 70°C for optimal performance.
LMK04803BISQ/NOPB datasheet
by Texas Instruments
