Datasheet > AFE7921

AFE7921

更新时间： 2024-09-20 11:14:27

品牌	Logo	应用领域
德州仪器 - TI		射频
页数	文件大小	规格书
13页	346K
描述
具有单频带 DUC/DDC 和两个反馈路径的 4TX/4RX 多频带射频采样收发器

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AFE7920, AFE7921, AFE7988, AFE7989

SBAS971C –DECEMBER 2019–REVISED JUNE 2020

AFE79xx Quad-Channel RF Transceiver With Feedback Path

1 Features

between TX and RX

•

Internal PLL/VCO to generate DAC/ADC clocks

•

Quad RF sampling 12-GSPS transmit DACs

Quad RF sampling 3-GSPS receive ADCs

Optional external CLK at DAC or ADC rate

SerDes data interface:

Dual RF sampling 3-GSPS feedback ADCs

(AFE792x only)

–

JESD204B and JESD204C compliant

8 SerDes transceivers up to 29.5 Gbps

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

•

Maximum RF signal bandwidth:

–

TX/FB: 1200 MHz (AFE7920/88) or 400 MHz

(AFE7989) or 800MHz (AFE7921)

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

Subclass 1 multi-device synchronization

–

RX: 600 MHz (AFE7920/88) or 400 MHz

(AFE7921/AFE7989)

•

Package: 17-mm × 17-mm FCBGA, 0.8-mm pitch

Digital Step Attenuators (DSA):

–

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

digital steps

2 Applications

•

Macro remote radio unit (RRU)

Active antenna system mMIMO (AAS)

Small cell base station

–

RX: 25 dB range, 0.5-dB steps

FB: 25 dB range, 0.5-dB steps

•

Single or dual-band DUC/DDCs (AFE7920/88

only) for TX and RX

Repeater

Distributed Antenna Systems (DAS)

•

Dual NCOs for fast frequency switching

Supports TDD operation with fast switching

3 Description

The AFE79xx is a family of high performance, wide bandwidth multi-channel transceivers, integrating four RF

sampling transmitter chains, four RF sampling receiver chains, and up to 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 AFE79xx devices 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 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 re-using the same analog

input for both purposes.

Each transmitter chain includes a single or dual digital up converters (DUCs) supporting up to 1200-MHz

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.

Device Information⁽¹⁾

PART NUMBER

PACKAGE

FC-BGA

BODY SIZE

AFE7989

AFE7920

AFE7988

AFE7921

17.00 mm × 17.00 mm

(1) For more information, see Mechanical, Packaging, and Orderable Information.

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.

12 3 4 5 6 7...13

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与AFE7921相关器件

型号	品牌	获取价格	描述	数据表
AFE7921IABJ	TI	获取价格	具有单频带 DUC/DDC 和两个反馈路径的 4TX/4RX 多频带射频采样收发器 \| A
AFE7950	TI	获取价格	AFE7950 4T6R RF Sampling AFE with 12 GSPS DACs and 3 GSPS ADCs
AFE7950_V01	TI	获取价格	AFE7950 4T6R RF Sampling AFE with 12 GSPS DACs and 3 GSPS ADCs
AFE7950_V02	TI	获取价格	AFE7950 4T6R RF Sampling AFE with 12 GSPS DACs and 3 GSPS ADCs
AFE7950ALKSHP	TI	获取价格	Radiation-hardness-assured (RHA), 4-transmit, 6-receive RF-sampling transceiver up to 10.6
AFE7950IABJ	TI	获取价格	AFE7950 4T6R RF Sampling AFE with 12 GSPS DACs and 3 GSPS ADCs
AFE7950IALK	TI	获取价格	AFE7950 4T6R RF Sampling AFE with 12 GSPS DACs and 3 GSPS ADCs
AFE7950-SP	TI	获取价格	Radiation-hardness-assured (RHA), 4-transmit, 6-receive RF-sampling transceiver up to 10.6
AFE7951	TI	获取价格	4 发送、4 接收、600MHz 至 12GHz、支持高达 400MHz IBW 的射频采
AFE7951IABJ	TI	获取价格	4-transmit, 4-receive RF-sampling transceiver, 600-MHz to 12-GHz, max 400-MHz IBW \| ABJ \|

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