GPIO

TX Chain 1

Common Dig

TX DIG

TX DIG

DAC

DAC

TX Chain 4

DAC

DAC

MCU

TX Chain 2

DAC

DAC

TX Chain 3

DAC

DAC

Config

From SPI

From

SPI

From

SPI

GPIOs

4TX+/-

VDD1p8TX

VSSTX

VDD1p8T

X

VSSTX

VDD1p8PLL

VSSPLL

3TX+/-

REFCLK_+/-

SYSREF

2TX+/-

1TX+/-

4STX

3STX

2STX

1STX

1SRX

2SRX

3SRX

4SRX

8STX

7STX

6STX

5STX

5SRX

6SRX

7SRX

8SRX

Syncbin/out

VDD1p2TX

VSSTX

VDD1p2TX

VSSTX

TX DIG

TX DIG

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

AFE7799

SBAS998 – JUNE 2019

AFE7799 Quad-Channel RF Transceiver With Feedback Path

1

1 Features

1

•

Quad transmitters based on direct up-conversion

architecture:

–

Up to 600 MHz of RF transmitted bandwidth

per chain

•

Quad receivers based on 0-IF down-conversion

architecture:

–

Up to 200 MHz of RF received bandwidth per

chain

•

Feedback chain based on RF sampling ADC:

–

Up to 600 MHz of RF received bandwidth

•

RF frequency range: 600 MHz to 6 GHz

•

Wideband fractional-N PLL, VCO for TX and RX

LO

•

Dedicated integer-N PLL, VCO for data converters

clock generation

•

JESD204B and JESD204C SerDes interface

support:

–

8 SerDes transceivers up to 29.5 Gbps

–

8b/10b and 64b/66b encoding

–

16-bit, 12-bit, 24-bit and 32-bit formatting

–

Subclass 1 multi-device synchronization

•

Package: 17-mm x 17-mm BGA, 0.8-mm pitch

2 Applications

•

Telecom 2G, 3G, 4G, 5G macro, micro base

stations

•

Telecom 4G, 5G massive MIMO base stations

•

Telecom 2G, 3G, 4G, 5G small cell

•

Microwave backhaul

3 Description

The AFE7799 is a high-performance, multichannel

transceiver, integrating

four

direct

up-conversion

transmitter

chains,

four

direct

down-conversion

receiver chains, and two wideband RF sampling

digitizing auxiliary chains (feedback paths). The high

dynamic range of the transmitter and receiver chains

allows generating and receiving 2G, 3G, 4G, and 5G

signals for wireless base stations. The low power

dissipation and large channels integration makes the

AFE7799 suitable to address the power and size

constrained 4G and 5G massive MIMO base stations.

The wideband and high dynamic range feedback path

can assist the digital pre-distortion (DPD) of the

power amplifiers in the transmitter chain. The fast

SerDes speed can help reducing the number of lanes

required to transfer the data in and out.

Each receiver chain of the AFE7799 includes a 28-dB

range digital step attenuator (DSA), followed by a

wideband passive IQ demodulator, and a baseband

amplifier with integrated programmable antialiasing

low pass filters, driving a continuous-time sigma-delta

ADC. The RX chain can receive an instantaneous

bandwidth (IBW) up to 200 MHz. Each receiver

channel has two analog peak power detectors and

various digital power detectors to assist an external

or internal autonomous AGC control for receiver

channels, and a RF overload detector for device

reliability protection. The integrated QMC (quadrature

mismatch compensation) algorithm is capable to

continuously monitor and correct for the rx chain I

and Q imbalance mismatch without the need to inject

any specific signals or perform offline calibration.

Each transmitter chain includes two 14-bit, 3-Gsps IQ

DACs, followed by a programmable reconstruction

and DAC image rejection filter, an IQ modulator

driving a wideband RF amplifier with 39-dB range

gain control. The TX chain integrated QMC and LO

leakage cancellation algorithms, leveraging the FB

path can constantly track and correct for the TX chain

IQ mismatch and LO leakage.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AFE7799

FCBGA (400)

17.00 mm x

17.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

AFE7799 Block Diagram