Datasheet

9.3 Higher Amplifier Voltage Supplies
Optional Configurations www.ti.com
Figure 18. DAC5682Z Resistor Jumper Configuration
The blue denotes the default configuration (operational amplifier output), whereas the yellow denotes the
transformer output option.
Table 6. Optional Output Signal Path.
R109 R134 R15 R6
Bypass OPA695 Install Install Remove Remove
Use OPA695 (default) Remove Remove Install Install
R135 R136 R20 R27
Bypass THS3091/5 Install Install Remove Remove
Use THS3095 (default) Remove Remove Install Install
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 ( ± 6.5V) and the THS3095 (33V
between +Vs and –Vs).
FB7 FB13 FB11 FB10
Internal Supply, Connect VAMP to +/-5V (default) Install Install
Connect OPA695 to VAMP (default) Install Install
External Supply, disconnect VAMP from+/-5V Remove Remove
Disconnect OPA695 from VAMP Remove Remove
TSW3070EVM: Amplifier Interface to Current Sink DAC - Arbitrary Waveform Generator Demonstration26 SLWU055 – May 2008
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