ALPHA SMV1233-003, SMV1233-004, SMV1233-011, SMV1233-073, SMV1233-074 Datasheet

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
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

Single	Single	Single	Common Anode	Common Cathode	Common Anode	Common Cathode
SC-79	SOD-323	SOT-23	SOT-23	SOT-23	SC-70	SC-70
♦ SMV1232-079	♦ SMV1232-011					♦ SMV1232-074
♦ SMV1233-079	♦ SMV1233-011	♦ SMV1233-001	♦ SMV1233-003	♦ SMV1233-004	♦ SMV1233-073	♦ SMV1233-074
♦ SMV1234-079	♦ SMV1234-011	♦ SMV1234-001	♦ SMV1234-003	♦ SMV1234-004	♦ SMV1234-073	♦ SMV1234-074
♦ SMV1235-079	♦ SMV1235-011	♦ SMV1235-001		♦ SMV1235-004		♦ SMV1235-074
♦ SMV1236-079	♦ SMV1236-011	♦ SMV1236-001		♦ SMV1236-004		♦ SMV1236-074
		♦ SMV1237-001		♦ SMV1237-004
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 [e-mail] ∙ www.alphaind.com	1
Specifications subject to change without notice. 6/99A

Hyperabrupt Tuning Varactors SMV1232–SMV1237

Electrical Specifications at 25°C

				CT	CT		CT @ 1 V					CT @ 1 V				RS @ 3 V	Q
Part	CT @ 1 V			@ 3 V	@ 6 V		CT @ 3 V					CT @ 6 V				500 MHz	@ 3 V
Number		(pF)		(pF)	(pF)		(Ratio)					(Ratio)				(Ω)	50 MHz
	Min.		Max.	Typ.	Typ.	Min.			Max.		Min.			Max.		Max.	Typ.
SMV1232	2.34		2.86	1.5	0.94	1.5			1.9		2.6			3.3		1.50	1400
SMV1233	3.00		3.60	1.8	1.10	1.5			1.9		2.6			3.3		1.20	1200
SMV1234	5.85		7.15	3.6	2.00	1.6			2.0		2.8			3.4		0.80	1000
SMV1235	10.35		12.65	6.4	3.60	1.6			2.0		2.9			3.4		0.60	750
SMV1236	15.50		18.50	9.2	5.30	1.6			2.0		3.0			3.5		0.50	700
SMV1237	45.00		54.00	26.9	14.40	1.6			2.0		3.0			3.5		0.25	500

Reverse Voltage VR (IR = 10 μA): 15 V

Reverse Current IR (VR = 12 V): 20 nA

Typical Performance Data

	100.0		SMV1237
				SMV1236
(pF)	10.0
Capacitance	1.0	SMV1235
		SMV1234			SMV1232
			SMV1233
	0.1
	0	2.0	4.0		6.0	8.0

Reverse Voltage (V)

Capacitance vs. Reverse Voltage

	5
(%)	4
	3
Change
	2	VR = 1 V
	1
Percentage	0
	-1
	-2
	-3			VR = 3 V
	-4
	-40	-20	0	20	40	60	80

Temperature (˚C)

Relative Capacitance Change

vs. Temperature

2
	SMV1232	SMV1233
			SMV1234
				SMV1235
(Ω)
1
S
R
	SMV1236
0	SMV1237
0	1	2	3	4	5

Reverse Voltage (V)

Series Resistance vs. Reverse Voltage @ 500 MHz

	10
(%)	8
	6
Change
	4
	2
Percentage	0
	-2
	-4
	-6
	-8
	-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 [e-mail] ∙ www.alphaind.com

Specifications subject to change without notice. 6/99A