MC100EL1648DT

Manufacturer Part NumberMC100EL1648DT
ManufacturerON Semiconductor
MC100EL1648DT datasheet
 


Specifications of MC100EL1648DT

Operating Temperature (max)85COperating Temperature (min)-40C
Package TypeTSSOPPin Count8
MountingSurface MountLead Free Status / RoHS StatusNot Compliant
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MC100EL1648
5 V ECL Voltage Controlled
Oscillator Amplifier
Description
The MC100EL1648 is a voltage controlled oscillator amplifier that
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 MC100EL1648 is ideal in applications requiring a local
oscillator, systems that include electronic test equipment, and digital
high−speed telecommunications.
The MC100EL1648 is based on the VCO circuit topology of the
MC1648. The MC100EL1648 uses advanced bipolar process
technology which results in a design which can operate at an extended
frequency range.
The ECL output circuitry of the MC100EL1648 is not a traditional
open emitter output structure and instead has an on−chip termination
emitter resistor, R
, with a nominal value of 510 W. This facilitates
E
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 (3.0 pF). If the user needs to fanout the
signal, an ECL buffer such as the EL16 (EL11, EL14) type Line
Receiver/Driver should be used.
Features
Typical Operating Frequency Up to 1100 MHz
Low−Power 19 mA at 5.0 Vdc Power Supply
PECL Mode Operating Range: V
CC
NECL Mode Operating Range: V
CC
to −5.5 V
Input Capacitance = 6.0 pF (TYP)
Pb−Free Packages are Available
NOTE:
The MC100EL1648 is NOT useable as a crystal oscillator.
BIAS POINT
EXTERNAL
TANK
TANK
CIRCUIT
V
EE
Figure 1. Logic Diagram
© Semiconductor Components Industries, LLC, 2008
August, 2008 − Rev. 8
= 4.2 V to 5.5 V with V
= 0 V
EE
= 0 V with V
= −4.2 V
EE
V
V
CC
CC
OUTPUT
V
AGC
EE
1
http://onsemi.com
MARKING
DIAGRAMS*
8
SOIC−8
K1648
8
D SUFFIX
ALYW
CASE 751
1
1
8
TSSOP−8
1648
8
DT SUFFIX
ALYWG
1
CASE 948R
1
14
SOEIAJ−14
KEL1648
M SUFFIX
ALYWG
14
CASE 965
1
1
DFN8
MN SUFFIX
CASE 506AA
1
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
M
= Date Code
G or G = Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
Publication Order Number:
MC100EL1648/D
G
G
4

MC100EL1648DT Summary of contents

  • Page 1

    MC100EL1648 5 V ECL Voltage Controlled Oscillator Amplifier Description The MC100EL1648 is a voltage controlled oscillator amplifier that requires an external parallel tank circuit consisting of the inductor (L) and capacitor (C). A varactor diode may be incorporated into the tank ...

  • Page 2

    BIAS V V AGC TANK V V OUT Lead Table 1. PIN DESCRIPTION Pin No. 8 Lead 14 Lead Á Á Á Á Á Á Á Á ...

  • Page 3

    Table 3. MAXIMUM RATINGS Symbol Parameter V Power Supply PECL Mode CC V Power Supply NECL Mode EE V PECL Mode Input Voltage I NECL Mode Input Voltage I Output Current out T Operating Temperature Range A T Storage Temperature ...

  • Page 4

    Table 4. PECL DC CHARACTERISTICS Symbol Characteristic I Power Supply Current EE V Output HIGH Voltage (Note Output LOW Voltage (Note 3) OL AGC Automatic Gain Control Input V Bias Voltage (Note 4) BIAS ...

  • Page 5

    GENERIC TEST CIRCUITS: Bypass to Supply Opposite GND 0 (1) 8 (10 (12) Tank #1 6 ( 100 mF 0. (1) 8 ...

  • Page 6

    Figure 5 illustrates the simplified circuit schematic for the MC100EL1648. The oscillator incorporates positive feedback by coupling the base of transistor Q6 to the collector of Q7. An automatic gain control (AGC) is incorporated to limit the current through the ...

  • Page 7

    Measured Frequency (MHz) 25 Calculated Frequency (MHz 300 500 1000 CAPACITANCE (pF) 100 Measured Frequency (MHz) Calculated Frequency (MHz 0.2 0.3 CAPACITANCE (pF Micro Metal ...

  • Page 8

    The MC100EL1648 external tank circuit components are used to determine the desired frequency of operation as shown in Figure 8, tank option #2. The tank circuit components have direct impact on the tuning sensitivity, I and phase noise performance. Fixed ...

  • Page 9

    The tank circuit configuration presented in Figure 11, Voltage Controlled Varactor Mode, allows the VCO to be tuned across the full operating voltage of the power supply. Deriving from Figure 6, the tank capacitor replaced with a varactor ...

  • Page 10

    WAVE−FORM CONDITIONING − SINE OR SQUARE WAVE The peak−to−peak swing of the tank circuit is set internally by the AGC pin. Since the voltage swing of the tank circuit provides the drive for the output buffer, the AGC potential directly ...

  • Page 11

    L 0 (12) Tank #3 6 ( 100 mF 0.01 mF Figure 16. Spectral Purity of Signal Output for 200 MHz Testing Q Driver Device Q Figure 17. Typical ...

  • Page 12

    ... ORDERING INFORMATION Device MC100EL1648D MC100EL1648DG MC100EL1648DR2 MC100EL1648DR2G MC100EL1648DT MC100EL1648DTG MC100EL1648DTR2 MC100EL1648DTR2G MC100EL1648M MC100EL1648MG MC100EL1648MEL MC100EL1648MELG MC100EL1648MNR4 MC100EL1648MNR4G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Resource Reference of Application Notes ...

  • Page 13

    ... G C SEATING PLANE −Z− 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...

  • Page 14

    K 8x REF 0.10 (0.004) 0.15 (0.006 L −U− PIN 1 IDENT 0.15 (0.006 −V− C 0.10 (0.004) D −T− G SEATING PLANE PACKAGE DIMENSIONS TSSOP−8 ...

  • Page 15

    VIEW 0.13 (0.005) M 0.10 (0.004) PACKAGE DIMENSIONS SOEIAJ−14 CASE 965−01 ISSUE DETAIL P c http://onsemi.com 15 ...

  • Page 16

    ... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...