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Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com 1
Specifications subject to change without notice. 8/01A
Silicon Hyperabrupt Varactor Diode Chips
Features
■ High Q for Low Loss Resonators
■ Low Leakage Current
■ High Tuning Ratio for Wideband VCOs
■ SPICE Model Parameters
■ Small Footprint Chip Design
Description
Alpha Industries’ product line of silicon hyperabrupt
junction varactor diode chips are processed using
established ion-implantation technology resulting in low
RSwide tuning ratio devices with high Q values. These
planar chips have a small outline size (12 x 12 mils
SMV2019 to SMV2023
Electrical Specifications at 25°C
Part Number (pF)
1
(pF) (pF) 50 MHz2RS@ 4 V (ΩΩ) (nA)3Diam. (mils)
4
Typ. Min. Max. Min. Max. Min. Typ. Max. Nom.
SMV2019-000 2.3 0.68 0.88 0.13 0.23 500 4.8 50 2.00
SMV2020-000 3.1 1.13 1.43 0.23 0.33 500 4.1 50 2.50
SMV2021-000 4.5 1.58 1.98 0.32 0.44 500 2.8 50 3.00
SMV2022-000 7.1 2.48 3.08 0.48 0.68 400 2.2 50 3.75
SMV2023-000 10.8 4.28 5.28 0.78 1.08 400 1.4 50 5.00
nominal) and are fully passivated resulting in low
leakage current and high reliability. These varactor chips
are intended for assembly in hybrid integrated circuit
resonators used in VCOs and analog tuned filters.
1. All capacitance values specified at 1 MHz.
2. 50 MHz Q calculated from 1 GHz R
S
and 1 MHz CJ.
3. V
B
at 10 µA specified at 22 V Min.
4. Outline drawing 149-801.
Characteristic Value
Reverse Voltage (VR) 22 V
Forward Current (IF) 100 mA
Power Dissipation at 25°C (PD) 250 mW
Operating Temperature (TOP) -55°C to +150°C
Storage Temperature (T
ST
) -65°C to +200°C
Absolute Maximum Ratings
0.010 (0.254 mm) MIN.
0.014 (0.356 mm) MAX. SQ.
ANODE METALIZED GOLD DOT
0.002 (0.051 mm) DIA. MIN.
CATHODE METALIZED BACK
CONTACT - GOLD
SILICON
0.004 (0.127 mm) MIN.
0.006 (0.152 mm) MAX.
Outline Drawing
149-801
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Silicon Hyperabrupt Varactor Diode Chips SMV2109 to SMV2023
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 8/01A
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
RES
R
S
R = R
S
PORT
P_anode
port = 1
PORT
P_Cathode
port = 2
DIODEM
Diode_Model
I
S
= 1.00e-14
R
S
= R
S
N = 1, 2
T
T
= 0
C
JO
= C
JO
M = M
V
J
= V
J
EG = 1.11
X
TI
= 3
K
F
=0
A
F
=1
F
C
= 0.5
B
V
= 22
I
BV
= 1e-5
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
Capacitance (pF)
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
0
1
2
3
4
5
6
7
8
9
10
11
12
0 5 10 15 20
SMV2019-000
SMV2020-000
SMV2021-000
SMV2022-000
SMV2023-000
Series Resistance (Ω)
Reverse Voltage (V)
Series Resistance vs. Voltage @ 1 GHz
0
1
2
3
4
5
6
084 121620
SMV2019-000
SMV2020-000
SMV2021-000
SMV2022-000
SMV2023-000
Typical Performance Data
SPICE Model
Part C
JO
V
J
MR
S
Number (pF) (V) (ΩΩ)
SMV2019 2.3 3.5 1.40 4.8
SMV2020 3.3 3.6 1.30 4.1
SMV2021 4.5 3.9 1.34 2.8
SMV2022 7.1 4.0 1.40 2.2
SMV2023 10.8 4.6 1.45 1.4
Typical Capacitance Values
SMV2019 SMV2020 SMV2021 SMV2022 SMV2023
VR(V) CJ(pF) CJ(pF) CJ(pF) CJ(pF) CJ(pF)
0.0 2.25 3.14 4.48 7.08 10.76
0.5 1.79 2.5 3.57 5.66 8.76
1.0 1.53 2.16 3.09 4.88 7.67
2.0 1.19 1.72 2.45 3.89 6.31
3.0 0.99 1.44 2.09 3.19 5.38
4.0 0.84 1.24 1.83 2.71 4.75
5.0 0.71 1.07 1.60 2.30 4.21
6.0 0.57 0.90 1.37 1.87 3.66
7.0 0.46 0.74 1.17 1.52 3.17
8.0 0.38 0.61 0.97 1.25 2.68
9.0 0.33 0.52 0.81 1.07 2.25
10.0 0.29 0.46 0.69 0.94 1.89
11.0 0.26 0.42 0.61 0.85 1.66
12.0 0.24 0.38 0.56 0.78 1.49
13.0 0.23 0.36 0.51 0.73 1.35
14.0 0.21 0.34 0.48 0.69 1.24
15.0 0.20 0.32 0.45 0.65 1.16
16.0 0.19 0.31 0.43 0.62 1.10
17.0 0.19 0.29 0.41 0.59 1.04
18.0 0.18 0.28 0.39 0.57 0.99
19.0 0.17 0.27 0.38 0.55 0.95
20.0 0.16 0.26 0.36 0.54 0.91
SPICE model parameters extracted from measured characteristics may not
reflect exact physical or electronic properties. See application note APN1004.
CV = + C
P
1+
C
J0
M
V
R
V
J
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