5
511
Alpha Industries
[617] 935 5150
Fax
[617] 824 4579
E-mail
sales@alphaind.com
Visit our web site:
www.alphaind.com
Features
High Reliability Silicon OxideNitride Dielectric
Low Loss, Typically 0.04 dB in a 50 Ohm
System
Operation Through 26 GHz
Wide Temperature Operation: 55
C to +200
C
Description
Four capacitors are provided on a single chip, binary
weighted, to give 15 different values of capacitance
by selective interconnection. This chip is designed for
low inductance microwave applications and have the
following features:
Each individual capacitor is accessible from chip
edge.
Connection to two or more capacitors can always
be made via a short ribbon at a central point.
The trimming capacitor is a MIS thin film device which
has a dielectric composed of thermally grown silicon
dioxide over which a layer of silicon nitride is deposited.
This dielectric possesses a low temperature coefficient
of capacitance, very high insulation resistance (typically
greater than 10
12
ohms), and low dissipation factor.
The device also exhibits excellent long term stability
making it suitable for high reliability applications. The
capacitor has a high dielectric breakdown which
permits the use of thin dielectrics resulting in large
capacitance in a small area.
The plated gold metalization on the top face of the
chip extends over most of the top surface. Gold wire
can be readily thermocompression bonded to this
metallization. The back side of the chip is also gold
metallized and is readily solderable. Custom parts
can be made having special values of capacitance or
working voltage. Special metallization geometries or
chip sizes can also be made available upon request.
Outline Description
428801
Maximum Ratings
Operating Temperature (T
OP
):
Storage Temperature (T
STG
):
Dielectric Withstanding
Voltage:
55 to +200
C
55 to +200
C
100 Volts
Electrical Specifications
Capacitance Tolerance
20%
. . . . . . . . . . . . . . . . . . . . . . . .
Temperature Coefficient
50 ppm/
C
. . . . . . . . . . . . . . . . . .
Insulation Resistance
10
5
Megohms Typical
. . . . . . . . . . .
Part
Number
Capacitance
(pF)
Maximum
Available
Capacitance
(pF)
Outline
Drawing
Number
SC9020006
0.25, 0.50,
1.0, 2.0
3.75
428801
SC9020018
1.0, 2.0,
4.0, 8.0
15
428801
Binary Trimming Capacitors (MIS)
SC9020006, SC9020018
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