Silicon Laboratories Si827 Series, Руководство пользователя

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2.5 Repeat for Second Channel
1. Disable the function generator output.
2. Turn OFF the 15 V supply.
3. Disconnect 15 V supply from VDDA/VSSA.
4. Connect the 15 V supply to VDDB and VSSB (J3 pins 3 and 1 or TP17 and TP18).
5. Move the channel 2 scope probe to VOB/VSSB (J3 pin 2/1 or TP19/TP18).
6. Move the function generator to VIB (JP2 pin 2 or TP6). NOTE: If this board is populated with the Si8274 device, leave the function
generator connected to VIA/PWM. Otherwise, move the shunt from JP2 to JP1.
7. Turn ON the dc supply.
8. Ensure that the current draw is less than 100 mA. If it is larger, this indicates that either the board or Si827x has been damaged or
the supply is connected backwards.
9. Enable the function generator output.
10. The scope display should show both the input and output waveforms as before. NOTE: If this board is populated with the Si8274
device, the output waveform will be inverted with respect to the input.
2.6 Test the Si8271
1. Disable the function generator output.
2. Turn OFF the 15 V supply.
3. Turn OFF the 5 V supply.
4. Disconnect 15 V supply from VDDA/VSSA.
5. Connect the 15 V supply to VDD and VSS (J5 pins 2 and 1 or TP22 and TP28).
6. Connect the 5 V supply to VDDI2 and GNDI2 (J4 pins 1 and 2 or TP20 and TP21).
7. Short the and VOUTPUT- pins together (J6 pins 1 and 2) and connect them to the channel 2 scope probe.
8. Ground the probe at VSS (J5 pin 1 or TP28).
9. Move the function generator to VI (JP4 pin 2 or TP23).
10. Move the channel 1 scope probe to be connected to the same points as the function generator.
11. Make sure jumper JP5 has a shunt between pins 1 and 2 to enable the device.
12. Turn ON the dc supplies.
13. Ensure that the current draw is less than 100 mA on the 15 V supply and 25 mA on the 5 V supply. If either is larger, this indicates
that either the board or Si827x has been damaged or the supply is connected backwards.
14. Enable the function generator output.
15. The scope display should show both the input and output waveforms as before.
UG186: Si827x-EVB User's Guide
Si827x ISOdriver Board Setup and Demo Test
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