Wideband RF-to-Digital Complex Feedback Receiver: Dual 12-Bit 800MSPS ADC, DVGA and Clock Solution
The TSW1266EVM is a wideband complex receiver reference design and evaluation platform that is ideally suited for use as a feedback receiver for transmitter digital predistortion. The EVM signal chain contains a complex demodulator, TI’s LMH6521 dual-channel DVGA and ADS5402 12-bit 800-MSPS dual-channel ADC. The signal chain can be configured for a variety of frequency plans by modifying the onboard filter components. The TSW1266EVM also includes TI’s LMK04808 8 dual-PLL clock jitter cleaner and generator to provide an onboard low-noise clocking solution. The gain of the LMH6521 DVGA can be controlled through the GUI or alternatively through the high speed connector with an FPGA. The EVM is designed to mate with the TSW1400EVM pattern capture and generation board to capture data from the ADC. Signal analysis can then be performed with the High Speed Data Converter Pro software tool.