M A COM MA45448, MA45446, MA45445, MA45440, MA45439 Datasheet

Surface Mount
Abrupt Tuning Varactors

Features

●

Surface Mount Package

●

Low Cost

●

High Quality Factor

●

Tape and Reel Packaging Available

●

SPC Controlled Process for Superior C-V Repeatability

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Available as Singles and Common Cathode Pairs

Description

The MA45430 series are abrupt junction silicon tuning
varactors in the SOT-23 surface mount package. These
thermal oxide passivated diodes feature high capacitance
ratio and quality factor. They are well suited for tuning in
the HF to UHF frequency bands. The standard capaci­tance tolerance is ±10%, with tighter tolerances available.
Capacitance matching at one or more bias voltages is
also available.

Applications

MA45430 Series

V3.00

SOT-23

Configurations

TOP VIEW

The MA45430 series tuning varactor is useful for tuning
applications in the HF through UHF ranges. Applications
include VCOs and voltage tuned filters in radios, cable
TV tuners and test instruments where low cost and excel­lent lot-to-lot repeatability are critical.

Ordering Information

The part numbers shown are for single diodes. When
ordering diodes in common cathode pairs add suffix
“CK.” For example, MA45436CK specifies model number
MA45436 as a common cathode pair. To order parts on
tape and reel add suffix T/R to the end of the part num­ber. i.e. MA45436CK - T/R.

Mounting Information

The diagram below indicates the recommended mount­ing pad configuration for the SOT-23 package. Solder
paste containing flux should be screened onto the pads
to a thickness of 0.005 inches. The SOT-23 device is
placed in position, firmly adhering to the solder paste.

Permanent attachment is performed by a reflow soldering
procedure. The tab temperature must not exceed 275°C

Absolute Maximum Ratings at 25°C

Parameter Absolute Maximum

Reverse Voltage 30 V
Forward Current 50 mA
Total Power Dissipation
Junction Operating Temperature -55°C to +150°C
Storage Temperature -55°C to +150°C

Note:

1. At 25°C case temperature. Derate linearly to 0 mW at 150°C.

and the body temperature must not exceed 250°C.

M/A-COM, Inc.

Specifications Subject to Change Without Notice.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

Fax [phone] Fax [phone] Fax [phone]

(SINGLE)

(COMMON CATHODE PAIR)

1

250 mW

1

Surface Mount Abrupt Tuning Varactors MA45430 Series

V3.00

Electrical Specifications @ 25°C

Minimum Breakdown Voltage (VB) = 30 Volts at 10µA
Maximum Reverse Current (I

) = 100 nA at 24 Volts

R

Lower capacitance values available upon request

Total

Capacitance Minimum
Model CT4 ± 10% Capacitance Ratio Minimum
Number (pF) CT0/CT30 Q

MA45436 4.7 4.5 1800
MA45437 5.6 4.5 1700
MA45438 6.8 4.5 1600
MA45439 8.2 4.5 1500
MA45440 10.0 4.5 1300
MA45441 12.0 4.6 1200
MA45444* 22.0 4.6 1000
MA45445* 27.0 4.7 900
MA45446* 33.0 4.7 750
MA45448* 47.0 4.7 400
Test VR= 4 V VR = 0/30 V VR= 4 V

Conditions f = 1 MHz f = 1 MHz f = 50 MHz

* Available as single diodes only.

Case Style
SOT-23 (High Profile)

Typical Performance Curve

CAPACITANCE vs REVERSE VOLTAGE

MA46H070–MA46H073

100

MA45448
MA45446

10

Total Capacitance (pF)

1

0.1 1 10 100
Reverse Voltage (Volts)

Capacitance vs. Reverse Voltage

INCHES MILLIMETERS

DIM. MIN. MAX. MIN. MAX.

A — 0.048 — 1.22
B — 0.008 — 0.20
C — 0.040 — 1.00
D 0.013 0.020 0.35 0.50
E 0.003 0.006 0.08 0.15
F 0.110 0.119 2.80 3.00
G 0.047 0.056 1.20 1.40
H 0.037 typical 0.95 typical

J 0.075 typical 1.90 typical
K 0.103 2.60
L 0.024 0.60

MA45444

MA45440
MA45438

MA45436

DIM. GRADIENT

DIMENSIONS MILLIMETERS (INCHES)

Specifications Subject to Change Without Notice.

M 10° max.
N2°

Note:

1. Applicable on all sides

2

…30

1

º

M/A-COM, Inc.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

Fax [phone] Fax [phone] Fax [phone]