AV9155C 查看數據表（PDF） - Integrated Device Technology

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AV9155C

Low Cost 20-Pin Frequency Generator

Integrated Device Technology 

AV9155C Recommended External Circuit

AV9155C

Notes:

1. ICS recommends the use of an isolated ground plane for the AV9155C. All grounds shown on this drawing should be

connected to this ground plane. This ground plane should be connected to the system ground plane at a single point. Please

refer to AV9155C Board Layout Diagram.

2. A single power supply connection for all VDD lines at the 2.2µF decoupling capacitor is recommended to reduce interaction

of analog and digital circuits. The 0.1µF decoupling capacitors should be located as close to each VDD pin as possible.

3. A 33Ω series termination resistor should be used on any clock output which drives more than one load or drives a long trace

(more than about two inches), especially when using high frequencies (>50 MHz). This termination resistor is put in series

with the clock output line close to the clock output. It helps improve jitter performance and reduce EMI by damping standing

waves caused by impedance mismatches in the output clock circuit trace.

4. The ferrite bead does not enhance the performance of the AV9155C, but will reduce EMI radiation from the VDD line.

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