M A COM MA4ST350-287, MA4ST350-1141, MA4ST340CK-287, MA4ST340-287, MA4ST340-1146 Datasheet

MA4ST300 Series

Low - Voltage / Wide Band

Si Hyperabrupt Varactors

Features

•Surface Mount Packages

•(SOT-23, SOT-323, SOD-323)

•High Capacitance Ratio at Low Voltages

•High Q at Low Voltages

•SPC Process for Superior C-V Repeatability

•Available as Single and Common Cathode Pairs

•Tape and Reel Packaging

•Designed for Commercial Wireless Applications

Description

The MA4ST300 series are ion-implanted, hyperabrupt junction, silicon tuning varactors in SOT-23, SOT-323, and SOD-323 surface mount packages. This series of varactors is designed for high capacitance ratio and low voltage operation. Each varactor type has a better than 3:1 capacitance ratio between 0.5V and 3.0V.

Applications

The MA4ST300 series tuning varactors are useful for wide band tuning and low phase noise applications where the supply voltage is limited to 5 volts or less. These varactors have been specifically designed to cover wireless application bands up to the 2.4 GHz WLAN band. Applications include VCOs and voltage tuned filters.

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Configurations

TOP VIEW (SOT-23, SOT-323)

Single

Pair

TOP VIEW (SOD-323)

Spice Model

Cp

Package

Parasitics

Rs

Cj

Ls

Intrinsic Diode

Model:

N = 1.1

CJ0=(see table below) VJ = (see table below) FC = 0.5

BV = 12.0 V

M= (see table below)

Parasitics: Cp= 0.15 pF Ls= 1.4 nH

													Part No.	CJ0 (pF)		VJ (V)	M
0.25		0.5		0.75		1.0		2.0		3.0			MA4ST320	77.4		11.71	6.51
				FREQUENCY (GHz)									MA4ST330	33.9		8.91	5.15
		Fig. 1 Typical Device Selection by Frequency											MA4ST340	25.3		14.25	7.41
													MA4ST350	15.7		14.55	7.26
																	V4.00
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Q Europe: Tel. [phone], Fax[phone]
www.macom.com				AMP and Connecting at a Higher Level are trademarks.
				Specifications subject to change without notice.

Low - Voltage / Wide Band Si Hyperabrupt Varactors	MA4ST300

Electrical Specifications @ TA = +25°C

Breakdown Voltage @ IR = 10 A, Vb = 12 V Minimum

Reverse Leakage Current @ VR = 10, IR = 100 nA Maximum

Part No.		CT		CT	Capacitance Ratio	Q Factor
		(pF)		(pF)
		f=1 MHz, VR=0.5V		f=1 MHz, VR=3.0V	CT0.5/CT3.0	f=50 MHz, VR= 2.0V
	Min.	Nom.	Max.	Max.	Typ.	Min.
MA4ST320	48.0	58.0	63.0	19.0	3.2	300
MA4ST330	22.0	26.0	30.0	9.0	3.2	350
MA4ST340	15.0	18.5	21.0	6.5	3.2	350
MA4ST350	9.5	11.8	13.5	4.5	3.2	400

Absolute Maximum Rating1

Parameter		Ratings
Device Current		100 Ma
Power Dissipation2, 3		650 mW
RF Input Power		+13 dBm
Junction Temperature		200°C
Storage Temperature		-65°C to +200°C
Thermal Resistance: θjc=140°C/W

Ordering Information

These varactors are available in the three case styles shown. When ordering, specify the desired case style by adding the case designation (287 for SOT-23, 1146 for SOT-323, 1141 for SOD-323) as a suffix to the model number. For example, MA4ST330-1141 specifies the MA4ST330 varactor in the SOD-323 package. The MA4ST320 is available in the SOT-23 and SOD-323 packages only. The model number indicated is for a single varactor. The MA4ST330, 340 and 350 are available in common cathode pairs in the SOT-23 package, and are specified by adding “CK” to the end of the model number. For example MA4ST330CK-287 specifies the MA4ST330 varactor in common cathode pairs.

Typical Performance Curves

Total Capacitance vs Reverse Voltage at 1 MHz

	1 0 0
		M A 4 S T 3 2 0
(pF)		M A 4 S T 3 3 0
Capacitance			M A 4 S T 3 4 0
	1 0
		M A 4 S T 3 5 0
Total
	1
	0 . 1	1	1 0
		R e v e r s e V o l t a g e ( V )

Nominal Change in Capacitance with Temperature

	9 0 0
TCC(PPM/°C)	7 0 0
	5 0 0
	3 0 0
	1 0 0
	0	1	2	3	4	5	6
				R e v e r s e V o l t a g e ( V )

Nominal Q at 50 MHz vs Reverse Voltage

1 0 0 0
	M A 4 S T 3 4 0
Q
Nominal	M A 4 S T 3 5 0
	M A 4 S T 3 3 0
	M A 4 S T 3 2 0
1 0 0
0 . 1	1	1 0
	R e v e r s e V o lt a g e ( V )

V4.00

M/A-COM Division of AMP Incorporated Q North America: Tel. [phone], Fax [phone] Q Asia/Pacific: Tel.[phone], Fax [phone] Q Europe: Tel. [phone], Fax[phone]

www.macom.com	AMP and Connecting at a Higher Level are trademarks.
	Specifications subject to change without notice.