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PDF MC12148D Data sheet ( Hoja de datos )
| Número de pieza | MC12148D | |
| Descripción | LOW POWER VOLTAGE CONTROLLED OSCILLATOR | |
| Fabricantes | Motorola Semiconductors | |
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Low Power
Voltage Controlled Oscillator
The MC12148 requires an external parallel tank circuit consisting of the
inductor (L) and capacitor (C). A varactor diode may be incorporated into the
tank circuit to provide a voltage variable input for the oscillator (VCO). This
device may also be used in many other applications requiring a fixed
frequency clock.
The MC12148 is ideal in applications requiring a local oscillator. Systems
include electronic test equipment and digital high–speed
telecommunications.
The MC12148 is based on the VCO circuit topology of the MC1648. The
MC12148 has been realized utilizing Motorola’s MOSAIC III advanced
bipolar process technology which results in a design which can operate at a
much higher frequency than the MC1648 while utilizing half the current.
Please consult with the MC1648 data sheet for additional background
information.
The ECL output circuitry of the MC12148 is not a traditional open emitter
output structure and instead has an on–chip termination resistor with a
nominal value of 500 ohms. This facilitates direct ac–coupling of the output
signal into a transmission line. Because of this output configuration, an
external pull–down resistor is not required to provide the output with a dc
current path. This output is intended to drive one ECL load. If the user
needs to fanout the signal, an ECL buffer such as the MC10EL16 Line
Receiver/Driver should be used.
NOTE: The MC12148 is NOT useable as a crystal oscillator.
• Typical Operating Frequency Up to 1100 MHz
• Low–Power 20 mA at 5.0 Vdc Power Supply
• 8–Pin SOIC Package
• Phase Noise –90 dBc/Hz at 25 kHz Typical
Order this document by MC12148/D
MC12148
LOW POWER
VOLTAGE CONTROLLED
OSCILLATOR
SEMICONDUCTOR
TECHNICAL DATA
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
SD SUFFIX
PLASTIC PACKAGE
CASE 940
(SSOP–8)
VCCO
0.01µF
0.1µF
BLOCK DIAGRAM
(Typical Test Circuit)
100µF
1200Ω*
Fout
VCC = 4.5 to 5.5 V
0.01µF 0.1µF
87 6 5
GND VCCO Out GND
* The 1200 Ω resistor
and the scope
termination impedance
constitute a 25:1
attenuator probe.
VCC AGC TANK Vref
12 3 4
100 0.1
µF µF
Vin
51KΩ
0.1µF
PIN CONNECTIONS
GND VCCO Out GND
8765
1234
VCC AGC TANK Vref
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC12148D
TA = – 40° to +85°C
MC12148SD
SO–8
SSOP–8
© Motorola, Inc. 1997
Rev 5
1 page  
MC12148
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
How to reach us:
USA / EUROPE / Locations Not Listed: Motorola Literature Distribution;
P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447
Mfax is a trademark of Motorola, Inc.
JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 141,
4–32–1 Nishi–Gotanda, Shagawa–ku, Tokyo, Japan. 03–5487–8488
Customer Focus Center: 1–800–521–6274
Motorola Fax Back System
– US & Canada ONLY 1–800–774–1848
– http://sps.motorola.com/mfax/
HOME PAGE: http://motorola.com/sps/
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
MOTOROLA RF/IF DEVICE DATA◊
MC121458/D
5 Page | ||
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| PDF Descargar | [ Datasheet MC12148D.PDF ] | |
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