Datasheet > LT5521

LT5521

更新时间： 2024-11-12 14:58:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	279K
描述
线性度非常高的有源混频器

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中文翻译

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数据手册

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LT5521 数据手册

LT5521

Very High Linearity

Active Mixer

FEATURES

DESCRIPTIO

The LT^®5521 is a very high linearity mixer optimized for

low distortion and low LO leakage applications. The chip

includes a high speed LO buffer with single-ended input

and a double-balanced active mixer. The LT5521 requires

only –5dBm LO input power to achieve excellent distor-

tion and noise performance, while reducing external drive

circuit requirements. The LO buffer is internally 50Ω

matched for wideband operation.

■

Wideband Output Frequency Range to 3.7GHz

■

+24.2dBm IIP3 at 1.95GHz RF Output

■

Low LO Leakage: –42dBm

■

Integrated LO Buffer: Low LO Drive Level

■

Single-Ended LO Drive

■

Wide Single Supply Range: 3.15V to 5.25V

■

Double-Balanced Active Mixer

Shutdown Function

■

16-Lead (4mm × 4mm) QFN Package

With a 250MHz input, a 1.7GHz LO and a 1.95GHz output

frequency, the mixer has a typical IIP3 of +24.2dBm,

–0.5dB conversion gain and a 12.5dB noise figure.

APPLICATIO S

The LT5521 offers exceptional LO-RF isolation, greatly

reducing the need for output filtering to meet LO suppres-

sion requirements.

■

Cellular, W-CDMA, PHS and UMTS Infrastructure

■

Cable Downlink Infrastructure

■

Wireless Infrastructure

■

Fixed Wireless Access Equipment

Thedeviceisdesignedtoworkoverasupplyvoltagerange

from 3.15V to 5.25V.

■

High Linearity Mixer Applications

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

TYPICAL APPLICATIO

Fundamental, 3rd Order

Intermodulation Distortion

vs Input Power

LO INPUT

–5dBm

6.8pF

GND

110Ω

4:1

82pF

FUND

BPF

1nF

2.7nH

–

OUT

INPUT

–20

–40

1:1

6.8pF

BPF

10pF

1nF

OUTPUT

IM3

110Ω

–60

–80

BIAS

= 250MHz

1nF

5V DC

= 1.7GHz

CC CC CC

= 1.95GHz

= –5dBm

= 25°C

1µF

–100

–14 –12 –10 –8 –6 –4 –2

(dBm)

5521 TA01

5521 TA02

5521f

12 3 4 5 6 7...16

中文翻译

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