RF-sampling analog front end features DAC and ADC

The Texas Instruments AFE76xx is a family of high performance, quad/dual channel, 14-bit, integrated RF sampling AFEs with nine GSPS DACs and three GSPS ADCs, capable of synthesising and digitising wideband signals. The high dynamic range allows the device to generate and digitise 3G/4G signals for wireless base stations. In TDD mode, the receiver channel can be configured to dynamically switching between traffic receiver (TDD RX) status and wideband feedback receiver (TDD FB) status to assist DPD (Digital Pre-Distortion) of the Power Amplifier (PA) on the transmitter path. The device family has integrated DSA on the receiver channels and also supports DSA equivalent functionality on the transmitter channels. Each receiver channel has one analog RF peak power detector and various digital power detectors to assist AGC control for receiver channels, and two RF overload detectors for device reliability protection. The family has eight of JESD204B compatible SerDes transceivers running up to 15Gbps. The devices have up to two DUCs per TX channel and two DDCs per RX channel, with multiple interpolation/decimation rates and digital quadrature modulators/demodulators with independent, frequency flexible NCOs. The devices support more than 1000MHz (800MHz as 4T4R) RF signal bandwidth in single-band mode and up to 800MHz (300MHz as 4T4R) RF signal bandwidth per band in dual-band mode. A low jitter PLL/VCO simplifies the sampling clock generation by enabling the use of a lower frequency reference clock.