Texas Instruments Using the DAC3482 or Configuring DAC3484 in DAC3482 mode

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(baseband = 30MHz, NCO disabled, QMC Gain = 1024)

Figure 13. DAC3484 Transformer Coupled Output at 30MHz IF

4.2Using the DAC3482 or Configuring DAC3484 in DAC3482 mode

The DAC3484 EVM can also be used to evaluate the performance of DAC3482, or configure the DAC3484 in Dual-DAC mode instead of the Quad-DAC mode. For DAC3482 or DAC3484 in Dual-DAC mode, only the Inner Channels (B and C) are functional and the other two channels (A and D) are disabled. The software can be configured as DAC3482 interface by selecting DAC3482 EVM Software Control from the upper left-hand corner of the pull-down menu.

The DAC3484 EVM needs to be configured differently for the DAC3482 mode with the TRF3703-15 modulator. The inner DACs need to be routed to the third TRF3703-15 modulator in the middle.

To enable the DAC3482 Dual DAC with the TRF3703-15 interface, do the following board modifications:

1.Remove R136, R278, R277, and R279 zero ohm jumpers

2.Install R137, R138, R246, R261

Refer to Figure 14 for locations of these zero ohm jumpers.

SLAU336 –March 2011	DAC3484/DAC3482 EVM	15
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