ALPHA SMV1281-011 Datasheet

Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com 1

Specifications subject to change without notice. 1/01A

Hyperabrupt Junction Tuning Varactor

Features

■ High Tuning Ratio

■ SOD-323 Package

■ Designed for High Volume, Low Cost

Applications

■ Available in Tape and Reel Packaging

SMV1281-011

Description

The SMV1281-011 is a surface mount varactor diode in the
SOD-323 plastic package. It is designed for very high
capacitance tuning ratio while having low series resistance,
which makes this device especially attractiv e for wideband
VCO applications.

Characteristic Value

Forward Current (IF) 20 mA
Power Dissipation (PD) 250 mW
Storage Temperature (TST) -55°C to +150°C
Operating Temperature (TOP) -55°C to +125°C

Absolute Maximum Ratings

Parameter Condition Min. Typ. Max. Unit

Reverse Current (IR)V

R

= 20 V 20.0 nA
Capacitance (CT) 1 V 7.8 8.6 9.5 pF
Capacitance (CT) 20 V 0.6 0.7 0.8 pF
Capacitance Ratio (CTR) 1 V/20 V 12.0
Series Resistance (RS)V

R

= 1 V, F = 500 MHz 1.7 Ω
Breakdown V oltage (VBR)I

R

= 10 µA24.0 V

Electrical Specifications at 25°C

Hyperabrupt Junction Tuning Varactor SMV1281-011

2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 1/01A

0

2

4

6

8

10

12

14

0 2 4 6 8101214161820

Reverse Voltage (V)

Capacitance vs. Reverse Voltage

Capacitance (pF)

Typical Performance Data

DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear

RES
R

S

R = R

S

IND
L

S

L = L

S

CAP
C

P

C = C

P

PORT
P_anode
port = 1

PORT
P_Cathode
port = 2

DIODEM
Diode_Model
I

S

= 1.00e-14

R

S

= 0
N = 1
T

T

= 0

C

JO

= C

JO

M = M
V

J

EG = 1.11
X

TI

= 3

K

F

=0

A

F

=1

F

C

= 0.5

B

V

= 0
I

BV

= 1e-3
I

SR

= 0
N

R

= 2
I

KF

= 0
N

BV

= 1

I

BVL

= 0

N

BVL

= 1

T

BV1

= 0

T

NOM

= 27

F

FE

= 1

SPICE Model

0.090 (2.30 mm) MIN.

0.108 (2.74 mm) MAX.

0.045 (1.15 mm) MIN.

0.053 (1.35 mm) MAX.

0.050

(1.25 mm) MAX.

0.006

(0.15 mm) TYP.

0.008 (0.20 mm) NOM.

0.004 (0.10 mm) MAX.

0.010 (0.25 mm) MIN.

0.010

(0.25 mm) MIN.

0.016

(0.40 mm) MAX.

0.063 (1.60 mm) MIN.

0.071 (1.80 mm) MAX.

CATHODE

INDICATOR

21

SOD-323

VR(V) CT(pF)

0 13.30
1 8.60
2 6.30
3 4.80
4 3.60
5 2.70
6 2.00
7 1.60
8 1.40

9 1.20
10 1.10
11 1.00
12 0.94
13 0.89
14 0.85
15 0.81
16 0.78
17 0.75
18 0.73
19 0.71
20 0.69

Part C

J0

V

J

MCPR

S

L

S

Number (pF) (V) (pF) (

ΩΩ))

(nH)

SMV1281-011 13 14 6 0.62 1.7 1.2

Capacitance vs. Reverse Voltage