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ADM1070EB Scheda tecnica(PDF) 6 Page - Analog Devices |
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ADM1070EB Scheda tecnica(HTML) 6 Page - Analog Devices |
6 / 12 page REV. 0 –6– EVAL-ADM1070EB EXAMPLE The user wants to simulate a live insertion event with the ADM1070 Evaluation Board. The user’s application operates with a –48 V supply voltage. The plug-in board load can be represented by a capacitive load of 100 µF. The ADM1070 will be mounted on the backplane. Set Up: 1. Resistor values of R1 = 39 k Ω and R2 = 1 kΩ should be used for a –48 V supply (see Table IV, page 11, ADM1070 data sheet). Default resistor ratio used. 2. User’s maximum load current = 1.4 A. An RSENSE of 47 m Ω gives maximum load current = 1.3 A (see Table I, ADM1070 data sheet). Default value used. 3. Default timing values can be used. Switch 2 placed in Position A. The Evaluation Board should be set up as described in the Residing On a Backplane section. A 100 µF load should set up (Default Capacitor C4 = 100 µF load). To generate the wave forms below on an oscilloscope, the following test points should be monitored. GATE Waveform: Connect an oscilloscope probe between T7 (GATE) and T5 (–48 V). SENSE Waveform: Connect an oscilloscope probe between T8 (SENSE) and T10 (–48 V). VOUT Waveform: Connect an oscilloscope between T11 (0 V) and T12 (–48 V OUT). The oscilloscope should be set to trigger on the rising edge of the GATE voltage. A live insertion event can be modeled by inserting the load board into the Evaluation Board Connector J9. Great care should be taken when handling and connecting live boards. CH2 100mV 5.00V CH1 10.0V CH3 M 500 s CH1 2.8V T T GATE SENSE VOUT Figure 10. Live Insertion Waveforms |
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