1 Features

• Octal RF sampling 12GSPS transmit DACs

• Octal RF sampling 3GSPS receive ADCs

• Maximum RF signal bandwidth:

– TX/FB: 800MHz

• 1200MHz in 4-channel mode

– RX: 600MHz

• RF frequency range: up to 6GHz

• Digital Step Attenuators (DSA):

– TX: 40dB range, 1dB analog and 0.125dB

digital steps

– RX/FB: 31/25dB range, 1dB step

• Single DUC/DDC per chain

• Dual NCOs per chain 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

– 8 SerDes transceivers up to 32.5Gbps

– 8b/10b and 64b/66b Encoding

– 12-bit, 16-bit, 24-bit and 32-bit resolution

– Subclass one multi-device synchronization

• Package:

– 17mm × 17mm FCBGA, 0.8mm pitch

2 Applications

• Macro remote radio unit (RRU)

• Active antenna system mMIMO (AAS)

• Small cell base station

• Distributed Antenna Systems (DAS)

• Repeater

3 Description

The AFE8092 is a high performance, wide bandwidth

multi-channel transceiver, integrating eight RF

sampling transmitter chains, eight RF sampling

receiver chains and two separate RF front end for the

auxiliary chains (feedback paths). The high dynamic

range of the transmitter and receiver chains allows

generating and receiving 3G, 4G and 5G signals

for wireless base stations, and the AFE8092 wide

bandwidth capability is designed for multi-band 4G

and 5G base stations.

Each receiver chain includes a 31dB range DSA

(Digital Step Attenuator), followed by a 3GSPS ADC

(analog-to-digital converter). Each receiver channel

has analog peak power detectors and digital peak

and power detectors to assist an external or

internal autonomous automatic gain controller, and

RF overload detectors for device reliability protection.

The digital down converters (DDC) provides up to

800MHz of combined signal BW in 8-channel mode

and 800MHz in 4-channel mode. In TDD mode, the

receiver channel can be configured to dynamically

switching between traffic receiver (TDD RX) and

wideband feedback receiver (TDD FB), with the

capability of re-using the same analog input for both

purposes.

Each transmitter chain includes a digital up converter

(DUC) supporting up to 800MHz combined signal

bandwidth (1200MHz in 4-channel mode). The output

of the DUC drives a 12GSPS DAC (digital to analog

converter) with a mixed mode output option to

enhance 2nd Nyquist operation. The DAC output

includes a variable gain amplifier (TX DSA) with 40dB

range and 1dB analog and 0.125dB digital steps.

The feedback path includes a 25dB range DSA

driving a 3GSPS RF sampling ADC, shared with

receiver chain, followed by a DDC with up to 800MHz

bandwidth (1200MHz in 4-channel mode).