Datasheet > LT5568

LT5568

更新时间： 2023-12-20 18:44:26

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	328K
描述
700MHz 至 1050MHz 高线性度直接正交调制器

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中文翻译

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LT5568 数据手册

LT5568

700MHz – 1050MHz High

Linearity Direct Quadrature

Modulator

DESCRIPTIO

FEATURES

The LT^®5568 is a direct I/Q modulator designed for high

performance wireless applications, including wireless

infrastructure. It allows direct modulation of an RF signal

using differential baseband I and Q signals. It supports

PHS, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, W-

CDMA, and other systems. It may also be conﬁgured

as an image reject upconverting mixer, by applying

90° phase-shifted signals to the I and Q inputs. The I/Q

baseband inputs consist of voltage-to-current converters

that in turn drive double-balanced mixers. The outputs of

these mixers are summed and applied to an on-chip RF

transformer, which converts the differential mixer signals

to a 50Ω single-ended output. The four balanced I and Q

baseband input ports are intended for DC coupling from a

source with a common mode voltage level of about 0.5V.

The LO path consists of an LO buffer with single-ended

input, and precision quadrature generators that produce

the LO drive for the mixers. The supply voltage range is

4.5V to 5.25V.

■

Frequency Range: 700MHz to 1050MHz

■

High OIP3: +22.9dBm at 850MHz

■

Low Output Noise Floor at 5MHz Offset:

No RF: –160.3dBm/Hz

OUT

= 4dBm: –154dBm/Hz

■

3-Ch CDMA2000 ACPR: –71.4dBc at 850MHz

Integrated LO Buffer and LO Quadrature Phase

Generator

■

50Ω AC-Coupled Single-Ended LO and RF Ports

50Ω DC Interface to Baseband Inputs

Low Carrier Leakage: –43dBm at 850MHz

High Image Rejection: –46dBc at 850MHz

16-Lead 4mm × 4mm QFN Package

APPLICATIO S

■

Infrastructure Tx for Cellular Bands

■

Image Reject Up-Converters for Cellular Bands

■

Low-Noise Variable Phase-Shifter for 700MHz to

1050MHz Local Oscillator Signals

RFID Reader

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

TYPICAL APPLICATIO

CDMA2000 ACPR, AltCPR and Noise vs RF

Output Power at 850MHz for 1 and 3 Carriers

700MHz to 1050MHz Direct Conversion Transmitter Application

–50

–60

–70

–80

–90

–125

–135

–145

–155

100nF

DOWNLINK TEST MODEL 64 DPCH

1-CH.

ACPR

LT5568

RF = 700MHz

TO 1050MHz

I-DAC

V-I

I-CHANNEL

3-CH. ACPR

0°

90°

3-CH. AltCPR

1-CH. AltCPR

1-CH. NOISE

BALUN

Q-CHANNEL

V-I

Q-DAC

3-CH. NOISE

5568 TA01

BASEBAND

GENERATOR

–165

VCO/SYNTHESIZER

–30

–25

–20

–15

–10

–5

RF OUTPUT POWER PER CARRIER (dBm)

5568 TA02

5568f

12 3 4 5 6 7...16

中文翻译

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与LT5568相关器件

型号	品牌	获取价格	描述	数据表
LT5568-2	Linear	获取价格	GSM/EDGE Optimized, High Linearity Direct Quadrature Modulator
LT5568-2	ADI	获取价格	GSM/EDGE 优化型高线性度直接正交调制器
LT5568-2EUF#PBF	Linear	获取价格	LT5568-2 - GSM/EDGE Optimized, High Linearity Direct Quadrature Modulator; Package: QFN; P
LT5568-2EUF#TRPBF	Linear	获取价格	LT5568-2 - GSM/EDGE Optimized, High Linearity Direct Quadrature Modulator; Package: QFN; P
LT5568-2EUF-PBF	Linear	获取价格	GSM/EDGE Optimized, High Linearity Direct Quadrature Modulator
LT5568-2EUF-TRPBF	Linear	获取价格	GSM/EDGE Optimized, High Linearity Direct Quadrature Modulator
LT5568EUF	Linear	获取价格	RF/Microwave Modulator/Demodulator, 700 MHz - 1050 MHz RF/MICROWAVE I/Q MODULATOR, 4 X 4 M
LT5568EUF#PBF	Linear	获取价格	LT5568 - 700MHz to 1050MHz High Linearity Direct Quadrature Modulator; Package: QFN; Pins:
LT5568EUF#TR	Linear	获取价格	RF/Microwave Modulator/Demodulator, 700 MHz - 1050 MHz RF/MICROWAVE I/Q MODULATOR, 4 X 4 M
LT5568EUF#TRPBF	Linear	获取价格	LT5568 - 700MHz to 1050MHz High Linearity Direct Quadrature Modulator; Package: QFN; Pins:

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