M A COM MA44769, MA44631B, MA44631A, MA44622B, MA44622A Datasheet

Step Recovery	MA43000, MA44600,
Diodes	MA44700 Series
	V3.00
Features

●Low Transition Times

●Tight Capacitance Ranges

●High Voltage and Low Thermal Resistance for Higher Input Power

●Surface Mount Package Available (SOT-23)

Description

The MA44600 series of Step Recovery diodes is designed for use in low and moderate power multipliers with output frequencies of up to 20 GHz. These Step Recovery diodes generate harmonics by storing a charge as the diode is driven to forward conductance by the positive voltage of the input signal. When the signal reverses polarity, this charge is extracted. The Step Recovery diode will appear as a low impedance current source until all the charge is extracted, then it will “snap” to a higher impedance. This causes a voltage pulse to form in the impulse circuit of the multiplier. Step Recovery diodes make excellent high order multipliers such as comb generators. They are also useful as efficient moderate power X2X4 multipliers.

Applications

High Order Narrow Band Moderate Power Multipliers (MA44600 series)

Comb Generators (MA43592, MA43543)

High Power Circuit Tested Multiplier (MA43000 Series)

Surface Mount Low Power Multipliers (MA44700 Series)

Specifications Subject to Change Without Notice.

M/A-COM, Inc.						1
North America: Tel. [phone]		■ Asia/Pacific: Tel.	[phone]	■ Europe: Tel.	[phone]
	Fax [phone]	Fax	[phone]	Fax	[phone]

Step Recovery Diodes				MA43000, MA44600, MA44700 Series
							V3.00
Electrical Specifications @ 25°C
Snap Varactors
	Minimum2		Junction3		Transition Time T 4
			Capacitance	Minimum
			Range (Cj)				S
Model1	Reverse			Lifetime		(ps)
	Voltage V		Min./Max.	10 mA/6 mA
Number	R		(pF)	TI (ns)	Nominal		Max.
	(Volts)
MA44621A	20		0.2 / 0.3	7	50		100
MA44621B	20		0.3 / 0.4	7	50		100
MA44621C	20		0.4 / 0.5	7	50		100
MA44622A	20		0.5 / 0.7	7	50		100
MA44622B	20		0.7 / 0.9	7	50		100
MA44631A	30		0.3 / 0.5	8	70		100
MA44631B	30		0.5 / 0.7	8	70		100
MA44631C	30		0.7 / 0.9	8	70		100
MA44641A	40		0.4 / 0.6	12	90		150
MA44641B	40		0.6 / 0.8	12	90		150
MA44641C	40		0.8 / 1.1	12	90		150
MA44652A	50		0.5 / 0.7	15	150		200
MA44652B	50		0.7 / 0.9	15	150		200
MA44652C	50		0.9 / 1.1	15	150		200
MA44663A	60		0.7 / 0.9	20	250		300
MA44663B	60		0.9 / 1.1	20	250		300
MA44663C	60		1.1 / 1.5	20	250		300
MA44663D	60		1.5 / 2.0	20	250		300

Notes:

1.When ordering, specify the desired case style by adding the case designation as a suffix to the model number. Case styles for the MA44600 series are 30, 91 and 93. To order in chip form, add the suffix “134” to the model number. The nominal chip size for the MA44600 series is 15 mils.

2.Reverse voltage (VR) is measured at a reverse bias current of 10 µA.

3.Junction capacitance is measured at a reverse voltage of 6 volts and a frequency of 1 MHz.

4.Transition time is measured between 20% and 80% points on the voltage recovery trace. Test conditions are +10 mA and -10 volts.

Case Styles (See appendix for complete dimensions)

30

91

93

134

Specifications Subject to Change Without Notice.

2							M/A-COM, Inc.
North America: Tel. (800)		366-2266	■ Asia/Pacific: Tel.	[phone]	■ Europe: Tel.	[phone]
	Fax (800)	618-8883	Fax	[phone]	Fax	[phone]