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2000 California Micro Devices Corp. All rights reserved.
10/25/2000
1
PRN100/110
CALIFORNIA MICRO DEVICES
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
Isolated Resistor Termination Network
Features
Stable resistor network
High speed termination network
8 or 12 terminating lines/package
Saves board space and reduces assembly cost
Product Description
CAMD's PRN100/110 Isolated Resistor Termination
Networks offer high integration and performance in a
miniature QSOP or SOIC package, which saves critical
board area and provides manufacturing cost and
reliability efficiencies.
Why thin film resistor networks? A terminating resistor is
used to reduce or eliminate unwanted reflections on a
transmission line or in some cases provide DC pull-up/
pull-down. It can perform this function only when its
Applications
Series termination
Parallel termination
Pull up/pull down
Digital pulse squaring
Coding and decoding
Telemetry
Refer to AP-201 Termination Application Note for further
information.
C0970500
SCHEMATIC CONFIGURATION
resistance value is closely matched to the characteristic
impedance of the transmission line. The resistors used
for terminating transmission lines must be noiseless,
stable, and functional at high frequencies. Unlike thin
film-based resistor networks, conventional thick film
resistors used for this purpose are not stable over
temperature and time, and may have functional limita-
tions when used in high frequency applications.
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1
2000 California Micro Devices Corp. All rights reserved.
10/25/2000
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
2
PRN100/110
CALIFORNIA MICRO DEVICES
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California Micro Devices can develop a fully customized solution which embodies the configuration shown in this data sheet or modified to
suit specific application requirements. Very precise TCR, TCR tracking and resistor tolerances, and resistor-to-resistor ratio matching can
also be provided. A Non-Recurring Engineering (NRE) charge will apply for all fully customized requirements and a minimum order/lot will be
required.
Please direct your detailed circuit configuration and specification requirements to your local CMD representative or to the factory for a
quotation.
2000 California Micro Devices Corp. All rights reserved.
10/25/2000
3
PRN100/110
CALIFORNIA MICRO DEVICES
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
Resistance vs. Frequency
Resistance vs. Frequency
Impedance vs. Frequency
Impedance vs. Frequency
S21 Measurement vs. Frequency
S21 Measurement vs. Frequency
Impedance is measured using an HP4291A
S-Parameters are measured using an HP8753C
TYPICAL FREQUENCY RESPONSE CHARACTERISTICS
33 Ohms
SOIC Package
1K Ohms
SOIC Package
2000 California Micro Devices Corp. All rights reserved.
10/25/2000
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
4
PRN100/110
CALIFORNIA MICRO DEVICES
Impedance is measured using an HP4291A
Resistance vs. Frequency
Resistance vs. Frequency
Impedance vs. Frequency
Impedance vs. Frequency
33 Ohms
QSOP Package
1K Ohms
QSOP Package
TYPICAL FREQUENCY RESPONSE CHARACTERISTICS