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AFBR-0544Z Datasheet(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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AFBR-0544Z Datasheet(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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2 / 4 page  2 2. Evaluation Board Description The evaluation board schematic is shown in Figure 2. The differential LVDS or LVPECL electrical inputs signal of the transmitter are AC coupled through 100nF capacitors and connected by 50 Ω transmission lines to SMA connectors. The differential LVPECL electrical outputs from LVPECL ter- mination of the receiver are AC coupled through 100nF capacitors and connected by 50 Ω transmission lines to SMA connecters. The signal detect (SD) pin is LVPECL com- patible. The thick line between SMA connector and the input/output pins of AFBR-5972Z represents a 50 Ω trans- mission in the schematics (Figure 2). The top and bottom- sides of the evalution PCB are shown in Figure 3(a) and 3(b) respectively. The evaluation board is a two-layer PCB designed for 125 Mbit/s. The transceiver differential lines are placed below the ground plane (top side) to ensure a low inductance signal return path and continuous impedance along the trace. The ground plane under/around the transceiver helps the tranceiver dissipate thermal energy. A 1.57 mm PCB thickness is used so that the AFBR-5972Z mounting clip can be fitted properly. For best transceiver perfor- mance, the decoupling capacitor and ferrite bead should be placed as close as possible to the tranceiver supply voltage, as shown in Figure 3(b). Table 1 describes the input/output interface.The input/ output interface is shown on the top side of the evalua- tion board. Figure 2. Schematic of the AFBR-0544Z evaluation board Figure 3(a). Top side of the AFBR-0544Z evaluation board Figure 3(b). Bottom side of the AFBR-0544Z evaluation board Table 1. Input/output description Name Description Signal Level TD+ Differential transmitter inputs LVDS, LVPECL TD- RD+ Differential receiver outputs LVPECL RD- SD Signal detect DP Differential receiver output signal for differential probe measurement 3V3 Transmitter and receiver power supply 3.3 V GND Transmitter and receiver ground GND |
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Similar Description - AFBR-0544Z |
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