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DC590A-1 Fiches technique(PDF) 4 Page - Linear Integrated Systems |
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DC590A-1 Fiches technique(HTML) 4 Page - Linear Integrated Systems |
4 / 9 page QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS of the board and the demonstration circuit under evalua- tion to be powered separately. This is recommended when testing precision components such as high resolu- tion ADCs and DACs. Figure 3 shows how to connect an external supply to the isolated side of the controller and the board under evaluation. After disabling the switching supply, apply 7V–9V between the GND and V+ posts. These posts are the in, out, and ground terminals of an LT1761 LDO regulator. The demonstration circuit under evaluation may draw up to 100mA from VCC. 7V REGULATED SUPPLY DEMONSTRATION CIRCUIT UNDER EVALUATION 14-CONDUCTOR RIBBON CABLE USB CABLE TO HOST PC Figure 3. Connecting an external supply to the isolated side of the controller Another option is to supply power to the isolated side of the controller (see Figure 4) back through the board un- der evaluation. The LT1761 regulator is reverse-current protected. This allows any convenient 5V ±10% regu- lated supply to be used. In this case, the isolation cir- cuitry on DC590 is also powered from this source. worst-case current draw by DC590 is 50mA. DEMONSTRATION CIRCUIT UNDER EVALUATION 14-CONDUCTOR RIBBON CABLE 5V REGULATED SUPPLY USB CABLE TO HOST PC Figure 4. Supplying power to the controller through the board under evaluation 4 |
Numéro de pièce similaire - DC590A-1 |
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Description similaire - DC590A-1 |
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