M A COM MA4ST350-287, MA4ST350-1141, MA4ST340CK-287, MA4ST340-287, MA4ST340-1146 Datasheet

Low - Voltage / Wide Band Si Hyperabrupt Varactors MA4ST300

M/A-COM Division of AMP Incorporated Q North America: Tel. [phone], Fax [phone] Q Asia/Pacific: Tel.[phone], Fax [phone]

Q

Europe: Tel. [phone], Fax[phone]

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 var actors is des igned 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 s pecifi­cally 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 H

yp

erabrupt Varactors

MA4ST300 Series

0.25 0.5 0.75 1.0 2.0 3.0

350

FREQUENCY (GHz)

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340330320

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 = 1 2 .0 V
M = (see table below)

Spice Model

Low - Voltage / Wide Band Si Hyperabrupt Varactors MA4ST300

M/A-COM Division of AMP Incorporated Q North America: Tel. [phone], Fax [phone] Q Asia/Pacific: Tel.[phone], Fax [phone]

Q

Europe: Tel. [phone], Fax[phone]

www.macom.com

AMP and Connecting at a Higher Level are trademarks.

Specifications subject to change without notice.

V4.00

100

300

500

700

900

0123456

Reverse Voltage (V)

TCC(PPM/°C)

100

1000

0.1 1 10
Reverse Voltage (V)

Nominal Q

MA4S T320

MA4S T340

MA4S T350

MA4S T330

1

10

100

0.1 1 10
Reverse Voltage (V)

Total Capacitance (pF)

MA 4ST320

MA 4ST330

MA 4ST350

MA 4ST340

Absolute Maximum Ratin

g

1

Parameter Ratings

Device Current 100 Ma
Power Dissipation

2, 3

650 mW
RF Input Power +13 dBm
Junction Temperature 200°C
Storage Temperature -65°C to +200°C
Thermal Resistance:

θ

jc

=140°C/W

Typical Performance Curves

Total Capacitance vs Reverse Voltage at 1 MHz Nominal Change in Capacitance with Temper ature

Nominal Q at 50 MHz vs Reverse Voltage

Electrical Specifications @ TA = +25°C

Breakdown Voltage @ IR = 10 µA, Vb = 12 V Minimum
Reverse Leakage Current @ V

R

= 10, IR = 100 nA Maximum

Part No. C

T

C

T

Capacitance Ratio Q Factor

(pF)

(pF)

f=1 MHz, V

R

=0.5V

f=1 MHz, V

R

=3.0V C

T0.5/CT3.0

f=50 MHz, VR= 2.0V

Min.

Nom. Max. Max. Typ. Min.
MA4ST320 48.0 58.0 63.0 19.0 3.2 300
MA4ST330 22.0 26.0 30.0 9.0 3.2 350
MA4ST340 15.0 18.5 21.0 6.5 3.2 350
MA4ST350 9.5 11.8 13.5 4. 5 3.2 400

Ordering Information

These varactors are available in the three case styles shown.
When ordering, specify the desired case style by adding the case
designation (287 for SOT-23, 1146 for SOT-323, 1141 for
SOD-323) as a suffix to the model number. For example,
MA4ST330-1141 specifies the MA4ST330 varactor in the
SOD-323 package. The MA4ST320 is available in the SOT-23
and SOD-323 packages only. The model number indicated is
for a single varactor. The MA4ST330, 340 and 350 are avail­able in common cathode pairs in the SOT-23 package, an d are
specified by adding “CK” to the end of the model number. For
example MA4ST330CK-287 specifies the MA4ST330 var actor
in common cathode pairs.