1 Features
• Quad RF sampling 12-GSPS transmit DACs
• Quad RF sampling 3-GSPS receive ADCs
• Dual RF sampling 3-GSPS feedback ADCs
• Maximum RF signal bandwidth:
– TX: 2400 MHz for 2TX or 1200 MHz for 4TX
– FB: 1200 MHz
– RX: 1200 MHz (no FB); 600 MHz (with FB)
• RF frequency range: up to 12 GHz
• Digital Step Attenuators (DSA):
– TX: 40 dB range, 1-dB analog and 0.125-dB
digital steps
– RX: 25 dB range, 0.5-dB steps
• Dual-band DUC/DDCs for TX and RX
• Dual NCOs for fast frequency switching
• Supports TDD operation with fast switching
between TX and RX
• Internal PLL/VCO to generate DAC/ADC clocks
• Optional external CLK at DAC or ADC rate
• SerDes data interface:
– JESD204B and JESD204C compliant
– 8 SerDes transceivers up to 29.5 Gbps
– 8b/10b and 64b/66b encoding
– 12-bit, 16-bit, 24-bit, and 32-bit resolution
– Subclass 1 multi-device synchronization
• Package: 17-mm × 17-mm FCBGA, 0.8-mm pitch

2 Applications
• Macro remote radio unit (RRU)
• Active antenna system mMIMO (AAS)
• Small cell base station
• Repeater
• 5G mmWave radio
• Distributed Antenna Systems (DAS)

3 Description
The high performance, wide bandwidth multi-channel
transceiver, integrating four RF sampling transmitter
chains, four RF sampling receiver chains, and two
RF sampling digitizing auxiliary chains (feedback
paths). The high dynamic range of the transmitter
and receiver chains allows the device to generate and
receive 3G, 4G, and 5G signals from wireless base
stations, while the wide bandwidth capability of the is
designed for multi-band 4G and 5G base stations.
Each receiver chain includes a 25-dB range DSA
(Digital Step Attenuator), followed by a 3-GSPS ADC
(analog-to-digital converter). Each receiver channel
has an analog peak power detector and various
digital power detectors to assist an external or
internal autonomous automatic gain controller, and
RF overload detectors for device reliability protection.
The single or dual digital down converters (DDC)
provide up to 600 MHz of combined signal BW in dual
DDC mode or 1200-MHz BW in single DDC mode. In
TDD mode, the receiver channel can be configured to
dynamically switch between the traffic receiver (TDD
RX) and wideband feedback receiver (TDD FB), with
the capability of reusing the same analog input for
both purposes.
Each transmitter chain includes a single or dual
digital up-converters (DUCs) supporting up to 2400
MHz for 2TX or 1200 MHz BW for 4TX combined
signal bandwidth. The output of the DUCs drives a 12-
GSPS DAC (digital-to-analog converter) with a mixed
mode output option to enhance 2nd or 3rd Nyquist
operation. The DAC output includes a variable gain
amplifier (TX DSA) with 40-dB range and 1-dB analog
and 0.125-dB digital steps.
The feedback path includes an 25-dB range DSA
driving a 3-GSPS RF sampling ADC, followed by a
DDC with up to 1200 MHz bandwidth.