Low - Voltage / Wide Band Si Hyperabrupt Varactors

MA4ST300

M/A-COM Division of AMP Incorporated

3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087

3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

www.macom.com

AMP and Connecting at a Higher Level are trademarks.

Specifications subject to change without notice.

V4.00

Features

• Surface Mount Packages

• (SOT-23, SOT-323, SOD-323)

• High Capacitance Ratio at Low Voltages

• High Q at Low Voltages

• SPC Process for Superior C-V Repeatability

• Available as Single and Common Cathode Pairs

• Tape and Reel Packaging

• Designed for Commercial Wireless Applications

Description

The MA4ST300 series are ion-implanted, hyperabrupt junction,

silicon tuning varactors in SOT-23, SOT-323, and SOD-323

surface mount packages. This series of varactors is designed for

high capacitance ratio and low voltage operation. Each varactor

type has a better than 3:1 capacitance ratio between 0.5V and

3.0V.

Applications

The MA4ST300 series tuning varactors are useful for wide band

tuning and low phase noise applications where the supply voltage

is limited to 5 volts or less. These varactors have been specifi-

cally designed to cover wireless application bands up to the 2.4

GHz WLAN band. Applications include VCOs and voltage tuned

filters.

Low - Voltage / Wide Band

Si Hyperabrupt Varactors

MA4ST300 Series

0.25

0.5

0.75

1.0

2.0

3.0

350

FREQUENCY (GHz)

-&7

107

$036

7$&6

107

,6

*60

3'&

&7

$FWLYH3DJHUV

'(&7

3+3

'&6

:/$1

*36

3&6

605

340

330

320

Fig. 1 Typical Device Selection by Frequency

Part No.

CJ0 (pF)

VJ (V)

M

MA4ST320

77.4

11.71

6.51

MA4ST330

33.9

8.91

5.15

MA4ST340

25.3

14.25

7.41

MA4ST350

15.7

14.55

7.26

Configurations

TOP VIEW (SOT-23, SOT-323)

Pair

Single

TOP VIEW (SOD-323)

Ls

Cp

Cj

Rs

Package

Parasitics

Parasitics:

Cp= 0.15 pF

Ls= 1.4 nH

Intrinsic Diode

Model:

N = 1.1

CJ0=(see table below)

VJ = (see table below)

FC = 0.5

BV = 12.0 V

M = (see table below)

Spice Model