Hyperabrupt Tuning Varactors
Features
■High Capacitance Ratio,
C1 V/C3 V = 1.8, C1 V/C6 V = 3.1
■Low Series Resistance for Low
Phase Noise
■Multiple Packages SOT-23, SOD-323,
SC-70 and SC-79
■Designed for High Volume Commercial
Applications
■Full Characterization with SPICE Models
Description
The SMV1232–SMV1237 series of silicon hyperabrupt junction varactor diodes are designed for use in VCOs with low tuning voltage operation. The low resistance of these varactors makes them appropriate for high Q resonators in wireless system VCOs to frequencies beyond 2.5 GHz. The SMV1232–SMV1237 series is fully characterized for capacitance and resistance over temperature. SPICE model is provided.
SMV1232–SMV1237
Absolute Maximum Ratings
Characteristic |
Value |
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Reverse Voltage (VR) |
15 V |
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 |
ESD Human Body Model |
Class 1B |
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Single |
Single |
Single |
Common Anode |
Common Cathode |
Common Anode |
Common Cathode |
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SC-79 |
SOD-323 |
SOT-23 |
SOT-23 |
SOT-23 |
SC-70 |
SC-70 |
♦ SMV1232-079 |
♦ SMV1232-011 |
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♦ SMV1232-074 |
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♦ SMV1233-079 |
♦ SMV1233-011 |
♦ SMV1233-001 |
♦ SMV1233-003 |
♦ SMV1233-004 |
♦ SMV1233-073 |
♦ SMV1233-074 |
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♦ SMV1234-079 |
♦ SMV1234-011 |
♦ SMV1234-001 |
♦ SMV1234-003 |
♦ SMV1234-004 |
♦ SMV1234-073 |
♦ SMV1234-074 |
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♦ SMV1235-079 |
♦ SMV1235-011 |
♦ SMV1235-001 |
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♦ SMV1235-004 |
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♦ SMV1235-074 |
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♦ SMV1236-079 |
♦ SMV1236-011 |
♦ SMV1236-001 |
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♦ SMV1236-004 |
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♦ SMV1236-074 |
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♦ SMV1237-001 |
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♦ SMV1237-004 |
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LS = 0.7 nH |
LS = 1.5 nH |
LS = 1.5 nH |
LS = 1.5 nH |
LS = 1.5 nH |
LS = 1.4 nH |
LS = 1.4 nH |
♦ Available through distribution.
For other packages or configurations, please contact the factory.
Alpha Industries, Inc. [781] 935-5150 ∙ Fax [617] 824-4579 ∙ Email sales@alphaind.com ∙ www.alphaind.com |
1 |
Specifications subject to change without notice. 6/99A |
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Hyperabrupt Tuning Varactors SMV1232–SMV1237
Electrical Specifications at 25°C
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CT |
CT |
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CT @ 1 V |
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CT @ 1 V |
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RS @ 3 V |
Q |
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Part |
CT @ 1 V |
@ 3 V |
@ 6 V |
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CT @ 3 V |
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CT @ 6 V |
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500 MHz |
@ 3 V |
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Number |
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(pF) |
(pF) |
(pF) |
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(Ratio) |
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(Ratio) |
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(Ω) |
50 MHz |
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Min. |
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Max. |
Typ. |
Typ. |
Min. |
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Max. |
Min. |
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Max. |
Max. |
Typ. |
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SMV1232 |
2.34 |
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2.86 |
1.5 |
0.94 |
1.5 |
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1.9 |
2.6 |
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3.3 |
1.50 |
1400 |
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SMV1233 |
3.00 |
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3.60 |
1.8 |
1.10 |
1.5 |
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1.9 |
2.6 |
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3.3 |
1.20 |
1200 |
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SMV1234 |
5.85 |
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7.15 |
3.6 |
2.00 |
1.6 |
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2.0 |
2.8 |
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3.4 |
0.80 |
1000 |
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SMV1235 |
10.35 |
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12.65 |
6.4 |
3.60 |
1.6 |
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2.0 |
2.9 |
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3.4 |
0.60 |
750 |
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SMV1236 |
15.50 |
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18.50 |
9.2 |
5.30 |
1.6 |
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2.0 |
3.0 |
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3.5 |
0.50 |
700 |
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SMV1237 |
45.00 |
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54.00 |
26.9 |
14.40 |
1.6 |
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2.0 |
3.0 |
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3.5 |
0.25 |
500 |
Reverse Voltage VR (IR = 10 μA): 15 V
Reverse Current IR (VR = 12 V): 20 nA
Typical Performance Data
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100.0 |
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SMV1237 |
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SMV1236 |
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(pF) |
10.0 |
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Capacitance |
1.0 |
SMV1235 |
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SMV1234 |
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SMV1232 |
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SMV1233 |
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0.1 |
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0 |
2.0 |
4.0 |
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6.0 |
8.0 |
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
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5 |
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(%) |
4 |
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3 |
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Change |
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2 |
VR = 1 V |
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1 |
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Percentage |
0 |
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-1 |
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-2 |
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-3 |
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VR = 3 V |
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-4 |
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-40 |
-20 |
0 |
20 |
40 |
60 |
80 |
Temperature (˚C)
Relative Capacitance Change
vs. Temperature
2 |
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SMV1232 |
SMV1233 |
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SMV1234 |
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SMV1235 |
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(Ω) |
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1 |
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S |
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R |
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SMV1236 |
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0 |
SMV1237 |
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0 |
1 |
2 |
3 |
4 |
5 |
Reverse Voltage (V)
Series Resistance vs. Reverse Voltage @ 500 MHz
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10 |
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(%) |
8 |
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6 |
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Change |
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4 |
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2 |
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Percentage |
0 |
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-2 |
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-4 |
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-6 |
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-8 |
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-40 |
-20 |
0 |
20 |
40 |
60 |
80 |
Temperature (˚C)
Relative Series Resistance Change
vs. Temperature @ 500 MHz
2 |
Alpha Industries, Inc. [781] 935-5150 ∙ Fax [617] 824-4579 ∙ Email sales@alphaind.com ∙ www.alphaind.com |
Specifications subject to change without notice. 6/99A