A good PCB layout for the LTM2882CY-5 involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the traces between the IC and the input/output connectors. A 4-layer PCB with a dedicated power plane and a dedicated ground plane is recommended.
To ensure proper powering and decoupling of the LTM2882CY-5, use a high-quality, low-ESR capacitor (e.g., 10uF ceramic) between the VIN pin and GND, and a 0.1uF ceramic capacitor between the VCC pin and GND. Additionally, use a 1uF capacitor between the VCC pin and the analog ground (AGND) for analog power supply decoupling.
The LTM2882CY-5 supports cable lengths up to 10 meters (33 feet) for USB 2.0 and up to 3 meters (10 feet) for USB 3.0, assuming a good quality cable with proper shielding and termination.
To configure the LTM2882CY-5 for USB 3.0 operation, connect the USB 3.0 signal pins (D+/D-) to the corresponding pins on the IC, and ensure the VBUS pin is connected to a 5V power source. Additionally, set the MODE pin to a logic high to enable USB 3.0 mode.
The LTM2882CY-5 supports data rates up to 5 Gbps for USB 3.0 and up to 480 Mbps for USB 2.0.
LTM2882CY-5#PBF datasheet
by Linear Technology
