Texas Instruments AFE7950 4T6R RF Sampling AFE

The TI AFE7950 4T6R RF Sampling AFE offers an operating range up to 12GHz, allowing direct RF sampling in the L, S, C, and X-band frequency ranges without the need for additional frequency conversions stages. The high-channel-count and multi-mission systems are possible via improved density and flexibility.

The TX signal paths support interpolation and digital upconversion options that deliver up to 1200MHz of signal bandwidth for four TX or 2400MHz for two TX. The output of the DUCs drives a 12GSPS DAC (digital to analog converter) with a mixed-mode output option to enhance the 2nd Nyquist operation. The DAC output includes a variable gain amplifier (TX DSA) with a 40dB range and 1dB analog and 0.125dB digital steps.

Each receiver chain contains a 25dB range DSA (Digital Step Attenuator), followed by a 3GSPS ADC (analog-to-digital converter). Each receiver channel has an analog peak power detector and various digital power detectors to aid an external or internal autonomous automatic gain controller and RF overload detectors for device reliability protection. Flexible decimation options optimize data bandwidth up to 1200MHz for four RX without FB paths or 600MHz with two FB paths (1200MHz BW each).