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

M/A-COM, Inc.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

Fax [phone] Fax [phone] Fax [phone]

1

Specifications Subject to Change Without Notice.

V3.00

Step Recovery
Diodes

MA43000, MA44600,

MA44700 Series

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 X2- X4
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)

M/A-COM, Inc.

North America: Tel. [phone] ■ Asia/Pacific: Tel. [phone] ■ Europe: Tel. [phone]

Fax [phone] Fax [phone] Fax [phone]

2

Specifications Subject to Change Without Notice.

V3.00

Step Recovery Diodes MA43000, MA44600, MA44700 Series

Electrical Specifications

@ 25°C

Snap V aractors

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.

Junction

3

Minimum

2

Capacitance Minimum Transition Time T

S

4

Reverse Range (Cj) Lifetime (ps)

Model

1

V oltage V

R

Min./Max. 10 mA/6 mA

Number (Volts) (pF) TI (ns) Nominal Max.

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

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