National Semiconductor TSW3070EVM, Руководство пользователя

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Optional Configurations
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26 SLWU055A – May 2008 – Revised May 2016
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TSW3070EVM: Amplifier Interface to Current Sink DAC - Arbitrary Waveform
Generator Demonstration
9.3 Higher Amplifier Voltage Supplies
When changing the amplifier power supplies from the onboard ±5 V to some external supply, it is
important to ensure that the voltages to the OPA695 do not exceed ±6.5 V as this could damage the
device. When the situation merits, remove the ferrite beads that connect the OPA695 to the ±VAMP
supplies (FB10, FB11).
To connect external supplies, the ±VAMP amplifier net must be disconnected from the onboard ±5V net.
This involves removing ferrite beads FB7 and FB13. The external supply can then be connected to TP3
and TP9. Keep in mind that the maximum supply voltages for the OPA695 (±6.5 V) and the THS3095 (33
V bVs and –Vs).
FB7 FB13 FB11 FB10
Internal Supply, Connect VAMP to ±5 V (default) Install Install
Connect OPA695 to VAMP (default) Install Install
External Supply, disconnect VAMP from ±5 V Remove Remove
Disconnect OPA695 from VAMP Remove Remove
Figure 18. Position of Ferrite Beads for Power Options