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ADN4696E Datasheet(PDF) 3 Page - Analog Devices |
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ADN4696E Datasheet(HTML) 3 Page - Analog Devices |
3 / 8 page Evaluation Board User Guide UG-361 Rev. 0 | Page 3 of 8 EVALUATION BOARD CONFIGURATION SETTING UP THE EVALUATION BOARD The EVAL-ADN469xEFDEBZ allows the full-duplex parts in the ADN469xE family to be quickly and easily evaluated. The evaluation board allows all of the input and output functions to be exercised without the need for external components. Jumper configurations are shown in Table 2. The board is powered by connecting a 3.3 V power supply to the screw terminals for VCC and GND. Supply current is typically 16 mA with both driver and receiver enabled or 1 mA with both disabled. A 10 μF decoupling capacitor, C1, is fitted at the connector between VCC and GND. The VCC pin of the ADN469xE is fitted with a decoupling capacitor of 100 nF. An example evaluation of the ADN4692E/ADN4693E/ ADN4695E/ADN4697E driver is shown in Figure 2. A signal generator is connected to DI with an input signal of 50 MHz (ADN4692E/ADN4695E) or 100 MHz (ADN4693E/ADN4697E), with a 50% duty cycle and swing of between 0 V and 3.3 V. Jumpers LK1 and LK2 are connected in Position A to disable the receiver and enable the driver. Oscilloscope probes are connected to DI, Y, and Z. Similarly, an evaluation of the ADN4692E/ADN4693E/ ADN4695E/ADN4697E receiver is shown in Figure 3. A signal generator capable of applying a differential input signal is connected to J5 and J6, with the input swing between 1 V and 1.2 V (J6 input is the inverse of J5). Jumpers LK1 and LK2 are connected in Position B to enable the receiver and disable the driver. Oscilloscope probes are attached to RO, A, and B. EVALUATION WITH APPLICATIONS Two EVAL-ADN469xEFDEBZ boards can connect together in a point-to-point configuration, as shown in Figure 4. To allow part evaluation with a load equivalent to a parallel-terminated bus, the boards have been fitted with 50 Ω termination resistors. For the point-to-point configuration in Figure 4, replace these resistors with 100 Ω resistors. A signal generator is connected onto the DI input of one board. The Y and Z outputs of this board are connected to the A and B inputs of the second board, respectively. Connecting probes to DI on the first board, and A, B, and RO on the second, the propagation of the input signal across the bus and to the receiver output of the second board can be observed and evaluated. Alternatively, the EVAL-ADN469xEFDEBZ can connect to an existing bus and a control board, as shown in Figure 5, to test the performance in the application. In this case, remove both termination resistors, as well as the jumpers on LK1 and LK2. Connect control signals to RO, RE, DE, and DI. RE J2 LK1 LK2 DE J3 DI J4 A B J6 AB J5 J7 Z Y J8 RO J1 RO DE DI EVAL-ADN469xEFDEBZ GND GND GND GND GND GND J9 VCC SIGNAL GENERATOR OSCILLOSCOPE RE 3.3V POWER SUPPLY Figure 2. ADN4692E/ADN4693E/ADN4695E/ADN4697E Driver Evaluation with EVAL-ADN469xEFDEBZ RE J2 LK1 LK2 DE J3 DI J4 A B J6 AB J5 J7 Z Y J8 RO J1 RO DE DI EVAL-ADN469xEFDEBZ GND GND GND GND GND GND J9 VCC OSCILLOSCOPE RE 3.3V POWER SUPPLY SIGNAL GENERATOR Figure 3. ADN4692E/ADN4693E/ADN4695E/ADN4697E Receiver Evaluation with EVAL-ADN469xEFDEBZ |
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