Texas Instruments AFE7222EVM User Manual

The AFE722x EVM includes a great level of flexibility to enable the user to test it in a more system like
environment. The individual power rails can be generated through LDOs or DC/DC converters from a 6 V
power source and the EVM clock architecture allows for external clock input as well as clock generation
using a low jitter PLL in combination with a VCXO. On the transmit side the EVM provides the option of
connecting directly to the DAC outputs or perform up-conversion via on board IQ modulator.
On the digital side the EVM provides a seamless interface to the TSW1200 capture card in order to
evaluate received data directly on a PC. The TSW3100 pattern generation card can be used to provide
data to the dual DAC of the AFE722x and the on board CDCE72010 generates the appropriate clock for
the TSW3100 for synchronous operation. Both AFE722x and CDCE72010 can be programmed via SPI
conveniently through the USB connection.
IQ Modulator
Output
DAC Outputs
for ChA and ChB
TSW3100
AUX ADC and
DAC
SLOU330 – December 2011
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LO Input
Clock
Inputs
TSW1200
Copyright © 2011, Texas Instruments Incorporated
User's Guide
SLOU330 – December 2011
EVM Description
6V Power
Input
Power Supply Jumpers
for LDO/DCDC, iQ Mod
and CDCE72010
ADC Input for
ChA and ChB
USB
EVM Description
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