Macro remote radio unit (RRU)

Products and reference designs

Macro remote radio unit (RRU)

Block diagram

Overview

Integrated circuits and reference designs help you create macro remote radio units (RRUs) that connect people and devices with higher bandwidth. Our modern radio frequency (RF) sampling radio or intermediate frequency (IF) sampling architectures enable direct, high-speed data conversion while our companion power and clocking products meet the latest 5G requirements.

Design requirements

Modern macro RRUs require:

  • Highly integrated analog front end with wider bandwidth and multi-frequency operation.
  • High-density power management operating at high ambient temperature.
  • Network synchronization over packet-based fronthaul interface.

Explore applications similar in function and design

Block diagram

Find products and reference designs for your system.

RRU IF Sampling

Isolated -48V DC/DC power supply Isolated -48V DC/DC power supply PWM controller PWM controller High/low side driver High/low side driver FET FET FET FET SyncFET driver SyncFET driver Isolateddriver Isolateddriver Aux bias supply Aux bias supply Digital isolator Digital isolator Voltage Reference Voltage Reference Current sense Current sense eCPRI (from BBU) eCPRI(from BBU) COM Port COM Port Fan / AC Fan / AC T1/E1 T1/E1 TXa RXa TXaRXa TXn RXn TXnRXn GPS Clock GPS Clock . . . ... eCPRI RX clock eCPRI RX clock Analog front end (AFE) power Analog front end (AFE) power DC/DC converter DC/DC converter Load switch Load switch LDO LDO Multi-channel converter Multi-channel converter Multi-channel LDO Multi-channel LDO Point of load (POL) power Point of load (POL) power DC/DC controller DC/DC controller FET FET DC/DC converter DC/DC converter LDO LDO Sequencer Sequencer Power amplifier (PA) power Power amplifier (PA) power DC/DC controller DC/DC controller FET FET DC/DC converter DC/DC converter LDO LDO Clocking conditioner/synchronizer Clocking conditioner/synchronizer TCXO OCXO TCXOOCXO Network synchronizer/ jitter cleaner Network synchronizer/ jitter cleaner Clock buffer Clock buffer Communication Communication RS-485 RS-485 RS-232 RS-232 Ethernet PHY Ethernet PHY Digital front end (DFE) Digital front end (DFE) ARM ARM ASIC / FPGA ASIC / FPGA Glue logic Glue logic Voltage translation Voltage translation I/O expander I/O expander Logic gates Logic gates Supervisor & reset control Supervisor & reset control AISG interface AISG interface Digital potentiometer Digital potentiometer On/off keying (OOK) On/off keying (OOK) RS-485 RS-485 Protection Protection Hot swap controller Hot swap controller Driver Driver FET FET FET FET Optical Optical Optical module Optical module Current limit switch Current limit switch Retimer Retimer RF front end and power amplifier RF front end and power amplifier PA Module PA Module Filter Filter Filter Filter Filter Filter LNA LNA Duplexer Duplexer OPA OPA eFuse eFuse Current sense Current sense Analog monitor & control Analog monitor & control Temp sense Temp sense Switch Switch Filter Filter Switch Switch RF synthesizer (LO) RF synthesizer (LO) RF power detector RF power detector “nTX/nRX” antenna configuration “nTX/nRX” antenna configuration DVGA DVGA DVGA DVGA DVGA DVGA IF sampling analog front end IF sampling analog front end AFE AFE Memory Memory DDR DDR Flash Flash

Technical documentation

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Type Title Date
Application note Base Station Closed-Loop RF Pwr Cntrl w/LMV232 Crest-Factor Invariant Detector (Rev. A) 30 Apr 2013
Application note AN-1434 Crest Factor Invariant RF Power Detector (Rev. A) 30 Apr 2013
Technical article Are you ready for BAW? PDF | HTML 29 Jun 2023
Application note Dither Improves ACPR in RF Sampling DAC 24 Oct 2018
Application note Protecting Radio, Baseband and Active Antenna Systems with TPS2352x Hot Swaps 24 Aug 2018
White paper 準備好迎接 5G 世界: 使用技術與硬體需求概論 22 Feb 2019
Application note LMK0461x Phase Noise Performance With DC-DC Converters (Rev. B) 20 Jul 2017
Technical article Is it science fiction or 5G? PDF | HTML 19 Sep 2023
White paper Preparing for a 5G world: An overview of the enabling technologies and hardware 17 Dec 2018
Application note AFE768x Power Dissipation Comparison across Modes 17 Aug 2018
Application note Optimizing Layout of the TPS54824 HotRod™ Package for Thermal Performance 16 Nov 2018
Application note JESD204B Multi-Device Synchronization Using LMK0461x 16 Aug 2017
Analog Design Journal JESD204B multi-device synchronization: Breaking down the requirements 12 May 2015
White paper Analog advancements make waves in 5G communications 12 Aug 2016
Application note TI Network Synchronizer Clock Value Adds in Communications and Industrial Applic 12 Apr 2018
Application note Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) PDF | HTML 11 May 2022
Application note Powering the AFE7920 with the TPS62913 Low-Ripple and Low-Noise Buck Converter (Rev. A) PDF | HTML 11 May 2022
Application note MIMO Transceiver with AFE76xx for LTE and 5G Wireless Radio (Rev. A) 10 May 2022
Application note Clocking Optimization for RF Sampling Analog-to-Digital Converters (Rev. A) PDF | HTML 10 May 2022
Application note An Efficient LDO-less Power Supply Solution for AFE76xx 10 Aug 2018
Application note Spurs Analysis in the RF Sampling ADC 09 Feb 2018
Application note RF Sampling ADC with 800MHz of IBW LTE 08 Sep 2016
White paper Internally compensated advanced current mode (ACM) (Rev. A) 07 Dec 2018
White paper Direct RF conversion: From vision to reality 05 May 2015
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 05 Feb 2019
Application note AFE76xx as a Single-Chip Wideband Repeater Using Loopback Mode 01 Nov 2018

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