User Guide AFBR-0553Z Evaluation Kit DC-to-50 MBd 650-nm Link with RSSI Versatile Link Fiber Optic Evaluation Kit Introduction Evaluation Board The Broadcom AFBR-2529SIZ fiber optic receiver The evaluation kit incorporates all of the components features a Receiver Signal Strength Indicator (RSSI). required to run the optical link after connecting it to supply RSSI is a monitoring output that delivers an output current voltages and data lines. proportional to the average incoming optical power. The fully assembled evaluation board with separable PCB The AFBR-0553Z evaluation kit is designed to evaluate the sections for Rx (AFBR-2529SIZ) and Tx (AFBR-1629Z) is AFBR-2529SIZ with optical transmitter AFBR-1629Z. The equipped with 4-pin (angled) headers to enable fast and evaluation kit is equipped with the documents and easy connection to pin sockets of peripheries like a single- accessories necessary for easy use and verification. board computer. Evaluation Kit Applications The AFBR-0553Z contains: Optical receiver AFBR-2529SIZ for 50 MBd systems and below: Evaluation board with installed AFBR-2529SIZ and AFBR-1629Z devices Industrial control and factory automation HFBR-RNS001Z (Plastic Fiber Cable Standard Extension of RS-232 and RS-485 Attenuation POF, Simplex VL Connectors, 1 Meter) High-voltage isolation AFBR-0553Z User Guide (this document) Elimination of ground loops AFBR-1629Z Data Sheet Reduces voltage transient susceptibility AFBR-2529SIZ Data Sheet Advanced maintenance management of optical links by monitoring the incoming optical receiver power Broadcom AFBR-0553Z-UG100 March 22, 2018AFBR-0553Z Evaluation Kit User Guide DC-to-50 MBd 650-nm Link with RSSI Versatile Link Fiber Optic Evaluation Kit Transmitter AFBR-1629Z and receiver AFBR-2529SIZ have inverted logic, which results in positive link logic when combined. This means providing LOW electrical TTL input to the transmitter results in LOW electrical TTL output level at the receiver. Figure 1: AFBR-0553Z Evaluation Board Schematics AFBR-1629Z GND R2 0 TTL Input 4 Data In 3 VEE TX 2 NC VCC L1 GND 1 VCC 1 + R1 C3 C2 C1 4.7 k 100 nF 10 F 10 F GND GND GND GND AFBR-2529SIZ RSSI C7 R4 100 nF 2 k GND GND GND VCC L2 4 RSSI 1 + 3 VCC C6 C5 C4 RX 2 VEE 100 nF 10 F 10 F 1 Data Out GND GND GND GND R3 0 TTL Output GND NOTE: By changing the position of resistors R2 and R3, the PCB can be modified for 4-pin socket or SMA signal interface operation. NOTE: In case a low impedance load is connected to Data Out (for example, an oscilloscope with 50), exchanging the installed R3 (0) with a higher resistor value (for example, 4.7 k) is strongly recommended. Table 1: 4-Pin Header Interfaces Pin TX Section RX Section 1 Supply Voltage (Vcc) Data Output (D out) 2 Not connected (NC) Ground (GND) 3 Ground (GND) Supply Voltage (Vcc) 4 Data Input (D in) Analog Monitoring Signal (RSSI) This evaluation kit is equipped with 4-pin header interfaces to allow versatile connectivity, like fast and easy connection to a common single-board computer. Broadcom AFBR-0553Z-UG100 2 8 5 8 5 Gnd Gnd Gnd Gnd