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Texas Instruments AFE7900EVM Evaluation Module (EVM) is an RF-sampling transceiver platform that can simultaneously support up to four transmit, four receive, and two feedback (4T4R+2FB) channels. The module evaluates the AFE7900, which is a quad-channel RF-sampling analog front end (AFE). The AFE7900 includes 14-bit, 12GSPS digital-to-analog converters (DACs), 14-bit, 3GSPS analog-to-digital converters (ADCs), and an on-chip integrated phase-locked loop/voltage-controlled oscillator (PLL/VCO) for high-frequency clock generation for DACs and ADCs.
AFE7900EVM has options to use dual digital upconverters and downconverters in each channel to simultaneously synthesize and digitize multiple wideband signals with a high dynamic range. On-chip integrated digital step attenuator (DSA) for the receiver channels and DSA functionality for the transmitter channels are supported. Eight JESD204B/C-compatible serializer/deserializer (SerDes) transceivers, running up to 29.5Gbps, can be used for providing inputs and outputs to and from the AFE7900 through the onboard field-programmable gate array (FPGA) mezzanine card (FMC) connector.
AFE7900EVM includes the LMK04828 clock generator that provides a reference signal to the AFE on-chip PLL and generates the required SYSREF signals for the JESD204B/C protocol. Also included is the option for delivering an ultra-low-phase noise external clocking solution. The Texas Instruments AFE7900EVM implements an efficient low-dropout (LDO)-less power-management solution using only DC-DC converters for the required power rails. The design interfaces with the TI pattern/capture card solution (TSW14J57EVM) (sold separately) and many FPGA development kits.
