Datasheet > LT5571

LT5571

更新时间： 2023-12-20 18:45:53

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	319K
描述
620MHz - 1100MHz 高线性度直接正交调制器

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中文翻译

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LT5571 数据手册

LT5571

620MHz – 1100MHz High

Linearity Direct Quadrature

Modulator

FEATURES

DESCRIPTION

The LT^®5571 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

RFID,GSM,EDGE,CDMA,CDMA2000,andothersystems.

It may also be conﬁgured as an image reject upconvert-

ing mixer by applying 90° phase-shifted signals to the I

and Q inputs. The high impedance 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-modevoltageatabout0.5V.TheLOpathconsists

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.

■

Direct Conversion from Baseband to RF

■

High Output: –4.2dB Conversion Gain

■

High OIP3: 21.7dBm at 900MHz

■

Low Output Noise Floor at 20MHz Offset:

No RF: –159dBm/Hz

OUT

= 4dBm: –153.3dBm/Hz

■

Low Carrier Leakage: –42dBm at 900MHz

High Image Rejection: –53dBc at 900MHz

3-Ch CDMA2000 ACPR: –70.4dBc at 900MHz

Integrated LO Buffer and LO Quadrature Phase

Generator

■

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

High Impedance DC Interface to Baseband Inputs

with 0.5V Common Mode Voltage

■

16-Lead QFN 4mm × 4mm Package

APPLICATIONS

■

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

All other trademarks are the property of their respective owners.

RFID Interrogators

■

GSM, CDMA, CDMA2000 Transmitters

■

Point-to-Point Wireless Infrastructure Tx

■

Image Reject Up-Converters for Cellular Bands

■

Low-Noise Variable Phase-Shifter for 620MHz to

1100MHz Local Oscillator Signals

TYPICAL APPLICATION

CDMA2000 ACPR, AltCPR and Noise vs RF

Output Power at 900MHz for 1 and 3 Carriers

Direct Conversion Transmitter Application

–40

–50

–60

–70

–80

–90

–110

–120

–130

–140

–150

–160

DOWNLINK TEST

MODEL 64 DPCH

100nF

LT5571

×2

RF = 620MHz

TO 1100MHz

I-DAC

3-CH ACPR

V-I

I-CH

1-CH

3-CH AltCPR

ACPR

0°

90°

BALUN

Q-CH

V-I

1-CH NOISE

Q-DAC

1-CH AltCPR

3-CH NOISE

BASEBAND

GENERATOR

5571 TA01a

–30

–25

–20

–15

–10

–5

VCO/SYNTHESIZER

RF OUTPUT POWER PER CARRIER (dBm)

5571 TA01b

5571f

12 3 4 5 6 7...16

中文翻译

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与LT5571相关器件

型号	品牌	获取价格	描述	数据表
LT5571EUF	Linear	获取价格	620MHz - 1100MHz High Linearity Direct Quadrature Modulator
LT5571EUF#PBF	Linear	获取价格	暂无描述
LT5571EUF#TR	Linear	获取价格	IC TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16, 4 X 4 MM, PLASTIC, MO-220WGGC, QFN-
LT5571EUF#TRPBF	Linear	获取价格	LT5571 - 620MHz - 1100MHz High Linearity Direct Quadrature Modulator; Package: QFN; Pins:
LT5572	Linear	获取价格	1.5GHz to 2.5GHz High Linearity Direct Quadrature Modulator
LT5572	ADI	获取价格	1.5GHz 至 2.5GHz 高线性度直接正交调制器
LT5572EUF	Linear	获取价格	1.5GHz to 2.5GHz High Linearity Direct Quadrature Modulator
LT5572EUF#TRPBF	Linear	获取价格	LT5572 - 1.5GHz to 2.5GHz High Linearity Direct Quadrature Modulator; Package: QFN; Pins:
LT5575	Linear	获取价格	800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator
LT5575	ADI	获取价格	800MHz 至 2.7GHz 高线性度直接转换正交解调器

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