Low-Voltage / High Q Si Hyperabrupt Varactors

MA4ST200 Series

M/A-COM Division of AMP Incorporated

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

Q 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.

1.00E+02

1.00E+03

1.00E-01

1.00E+00

1.00E+01

REVERSE VOLTAGE (V )

MA4ST240

MA4ST250

MA4ST230

200

300

400

500

600

700

02

468

REVERSE VOLTAGE (V)

Absolute Maximum Rating

Parameter

Absolute Maximum

Reverse Voltage

12 Volts

Forward Current

50 mA

Total Power Dissipation

250 mW

Junction Operating Temp.

-55°C to +125°C

Storage Temperature

-55°C to +125°C

Typical Performance Curves

TOTAL CAPACITANCE vs REVERSE VOLTAGE at 1 MHz

NOMINAL Q at 50 MHz vs REVERSE VOLTAGE

NOMINAL CHANGE in CAPACITANCE with

TEMPERATURE

Electrical Specifications @ T

Breakdown Voltage @ I

Reverse Leakage Current @ V

0.1

1

10

100

0.1

1

10

REVERSE VOLTAGE (V)

MA4ST230

MA4ST250

MA4ST240

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,

MA4ST230-1141 specifies the MA4ST230 varactor in the

SOD-323 package. The model number indicated is for a single

varactor.

Common cathode pairs are available in SOT-23

package, and are specified by adding “CK” to the end of the

model number. For example MA4ST230CK-287 specifies the

MA4ST230 varactor in common cathode pairs.

C

T

C

T

Capacitance Ratio

Q Factor

(pF)

(pF)

Part

f = 1 MHz, V

f = 1 MHz, V

C

f = 50 MHz, V

Number

Min.

Nom.

Max.

Max.

Typ.

Min.

MA4ST230

4.5

5.0

6.0

3.1

3.5

400

MA4ST240

3.0

3.5

4.2

2.3

3.5

450

MA4ST250

2.3

2.7

3.5

1.8

3.5

450