Data Sheet

3/8/2018 Digital Discovery Reference Manual [Reference.Digilentinc]
https://reference.digilentinc.com/reference/instrumentation/digital-discovery/reference-manual 15/25
(https://reference.digilentinc.com/_detail/digital_discovery/dd_8dinuserconnector.png?
id=reference%3Ainstrumentation%3Adigital-discovery%3Areference-manual)
Figure 8. DIN user connector. []
(https://reference.digilentinc.com/_detail/digital_discovery/dd_9inputdivider.png?
id=reference%3Ainstrumentation%3Adigital-discovery%3Areference-manual)
Figure 9. Input Divider. []
(https://reference.digilentinc.com/_detail/digital_discovery/dd_10vrefioreference.png?
id=reference%3Ainstrumentation%3Adigital-discovery%3Areference-manual)
Figure 10 VREFIO reference. []
In Figure 11, IC16 limits the in-rush current when the device is connected to the USB port. INA214 is a current shunt amplifier, with a gain
of 100. With Vref = 0.75V and R163 = 15mΩ, the output voltage is:
The VBUS voltage is halved to VSNS_VBUS, for being also monitored. IC12 in Figure 11 is a triple power supply, generating the rails of
1.2V for the FPGA core, 1.5V for Bank 3 and DDR3 memory and 3.3V, for various circuits.
4. Power supplies and control
4.1 Internal power supplies