Datasheet > SW-438

SW-438

更新时间： 2024-11-14 22:42:35

品牌	Logo	应用领域
泰科 - TE		开关光电二极管
页数	文件大小	规格书
4页	87K
描述
GaAs SPDT Switch DC. 3.0 GHz

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中文翻译

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数据手册

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SW-438 数据手册

GaAs SPDT Switch

DC– 3.0 GHz

V 1.00

Features

Functional Schematic

Low Insertion Loss, 0.7 dB @ 2.4 GHz¹

High Isolation, 25 dB @ 2.4 GHz¹

C=8pF

C 39pF

C=100pF

Low Power Consumption, < 10 µA @ +3 V

Low Cost Plastic SOT-363 Package

RFC

1. For best results at 2.4 GHz, use 8 pF 0402 profile SMT capaci-

tors on RF ports and 100 pF bypassing on pins 4 and 6.

Description

The SW-438 is a GaAs MMIC SPDT switch in a low cost

SOT-363 surface mount plastic package. Typical applica-

tions include transmit/receive switching for Bluetooth and

WLAN equipment. The SW-438 can also be used in applica-

tions up to 500 mW in systems such as cellular, PCS,

DCS1800, GSM, CDMA and other analog and digital wire-

less communications systems.

RF1

GND

RF2

RF1

GND

RF2

PIN 1

Broad Band Applications

39pF

2.4 GHz Application

C=8pF

C 39pF

M/A-COM fabricates the SW-438 using a 0.5 micron gate

length GaAs p-HEMT process. The process features full pas-

sivation for increased performance and reliability.

Pin Configuration

Pin No.

Function

Description

RF1

GND

RF2

RF Input/Output

RF Ground

External Component Requirements

RF Input/Output

Control 2 Input

RF Common Port

Please note the values of the external capacitors. The ca-

pacitors at each of the RF ports are used as for achieving

optimum insertion loss. They also provide DC blocking for

positive control. The 8 pF (0402) capacitor is recom-

mended for 2 - 3 GHz operation. If this value is changed or

the capacitor placed too far from the switch, the perform-

ance will be affected. We also recommend 100 pF bypass

capacitors on pins 4 and 6.

RFC

Control 1 Input

Ordering Information

For broadband applications with positive control voltages,

use DC blocking capacitors with value of 39 pF or more.

Part Number

SW-438TR-3000

SW-438SMB

Package

SW-438 on 13 Inch, 3000 piece Reel

SW-438 sample test board

Truth Table

Mode

RFC-RF1

RFC-RF2

(Control)

Positive¹

0 + 0.2V

+2.3 to +5V

0 + 0.2V

Off

Negative ²

0 + 0.2V

-2.3 to +5V

0 + 0.2V

Off

1. External DC blocking capacitors are required on all RF ports.

2. If negative control is used, DC blocking capacitors are not required on RF ports.

12 3 4

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