SLOU330 Datasheet, PDF (13/18 Pages) Texas Instruments – EVM Description

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TX Setup
The other portion of the RX setup is located on the ‘Receive Control’ tab which includes register access
for the mixing stage, power meter and power options for the digital RX section. Also the auxiliary ADC
registers are configured on this tab.
RX controls are
located on this tab
Mixing section controls gain, offset,
mixing mode and NCO
This section controls
power down options
on digital RX chain
The power meter
indicates the input
power level to the two
ADCs
This section controls
auxiliary ADC and its
mux input
8 TX Setup
For the transmit output, the AFE722x EVM provides an option to directly route the DACs to SMA
connectors as well as an option to connect the dual DAC to an IQ modulator (TRF3703) for direct
up-conversion. The schematic below shows the two options and the relevant 0Ω resistors to switch
between them.
When using the IQ modulator, there is a separate SMA connector on the EVM for the LO input. Also there
is a low pass filter between DAC and IQ modulator for image suppression with a default cut off frequency
of 125 MHz.
SLOU330 – December 2011
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EVM Description
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