Motorola MC12148D, MC12148SD Datasheet



SEMICONDUCTOR

TECHNICAL DATA

LOW POWER

VOLTAGE CONTROLLED

OSCILLATOR

Order this document by MC12148/D

8

1

GND

V

CC

7

2

VCCO

AGC

6

3

Out

TANK

5

4

GND

V

ref

Device

Operating

Temperature Range

Package

ORDERING INFORMATION

MC12148D
MC12148SD

TA = – 40° to +85°C

SO–8

SSOP–8

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

8

1

(Top View)

PIN CONNECTIONS

SD SUFFIX

PLASTIC PACKAGE

CASE 940
(SSOP–8)

8

1

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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

 Motorola, Inc. 1997 Rev 5

BLOCK DIAGRAM

(Typical Test Circuit)

7865

2134

GND VCCO Out GND

VCCAGC TANK V

ref

1200Ω*

F

out

V

in

51K

Ω

0.1µF

* The 1200

Ω

resistor
and the scope
termination impedance
constitute a 25:1
attenuator probe.

0.1µF0.01µF 100µF

0.1

µ

F

100

µ

F

0.01µF

0.1µF

VCCO

VCC = 4.5 to 5.5 V

MC12148

2

MOTOROLA RF/IF DEVICE DATA

MAXIMUM RATINGS

Parameter

Symbol Value Unit

Power Supply Voltage, Pins 1, 7 V

CC

–0.5 to 7.0 Vdc

Operating Temperature Range T

A

–40 to 85 °C

Storage Temperature Range T

stg

–65 to 150 °C

NOTE: ESD data available upon request.

ELECTRICAL CHARACTERISTICS (V

CC

= 5.0 V; TA = –40 to 85°C, unless otherwise noted.)

Characteristic

Symbol Min Typ Max Unit

Supply Current I

CC

– 19 25 mA

Output Level HIGH (1.0 MΩ Impedance) V

OH

3.95 4.17 4.61 V

Output Level LOW (1.0 MΩ Impedance) V

OL

3.04 3.41 3.60 V

CSR @ 25 kHz Offset, 1.0 Hz BW

L

(f)

– –90 – dBc/Hz

CSR @ 1.0 MHz Offset, 1.0 Hz BW

L

(f)

– –120 – dBc/Hz
SNR (Signal to Noise Ratio from Carrier) SNR – 40 – dB
Frequency Stability Supply Drift Fsts – 3.6 – KHz/mV

Thermal Drift Fstt – 0.1 – KHz/°C

Second Harmonic (from Carrier) H2 – –25 – dBc

Figure 1. Circuit Schematic

2

AGC

5

GND

3

TANK

4

V

ref

8

GND

V

CC
1

V

CCO

7

Q4

Q3 Q2

Q1

Q5

D1

Q8

Q7 Q6

Q9

Q10Q11

D2

6

OUT

510

Ω

MC12148

3

MOTOROLA RF/IF DEVICE DATA

L

(f) [dBc/Hz] versus f [Hz]

Figure 2. Typical Evaluation Results

(CSR MC12148 5.0 Vdc; VCC @ 25°C; 930 MHz CW)

1K

–140

dBc/Hz

10K 100K 1M 10M 100M

–120

–100

–80

–60

–40

–20

0

Tank Component Suppliers

Below are suppliers who manufacture tuning varactors and inductors which can be used to build an external tank circuit.
Motorola has used these varactors and inductors for evaluation purposes, however, there are other vendors who manufacture
similar products.

Coilcraft Inductors A01T thru A05T

Coilcraft–Coilcraft, Inc.
1102 Silver Lake Rd.
Gary, Illinois 60013
708–639–6400

Loral Tuning Varactors GC1500 Series

Loral
16 Maple Road
Chelmsford, Massachusetts 01824
508–256–8101 or 508–256–4113

Alpha Tuning Diodes DVH6730 Series

Alpha Semiconductor Devices Division
20 Sylvan Road
Woburn, MA 01801
617–935–5150

* At 1.1 GHz, use a Coilcraft A0IT Springair coil at 2.5 nH and a Loral Varactor 3.0 to 8.0 pF at VIN = 1.0 to 5.0 V.

MC12148

4

MOTOROLA RF/IF DEVICE DATA

SD SUFFIX

PLASTIC PACKAGE

CASE 940-03

(SSOP–8)

ISSUE B

DIMAMIN MAX MIN MAX

INCHES

2.87 3.13 0.113 0.123

MILLIMETERS

B 5.20 5.38 0.205 0.212
C 1.73 1.99 0.068 0.078
D 0.05 0.21 0.002 0.008
F 0.63 0.95 0.024 0.037
G 0.65 BSC 0.026 BSC
H 0.44 0.60 0.017 0.023
J 0.09 0.20 0.003 0.008

J1 0.09 0.16 0.003 0.006

K 0.25 0.38 0.010 0.015

K1 0.25 0.33 0.010 0.013

____

NOTES:

1 DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.
2 CONTROLLING DIMENSION: MILLIMETER.
3 DIMENSION A DOES NOT INCLUDE MOLD FLASH,

PROTRUSIONS OR GATE BURRS. MOLD FLASH

OR GATE BURRS SHALL NOT EXCEED 0.15

(0.006) PER SIDE.
4 DIMENSION B DOES NOT INCLUDE INTERLEAD

FLASH OR PROTRUSION. INTERLEAD FLASH OR

PROTRUSION SHALL NOT EXCEED 0.15 (0.006)

PER SIDE.
5 DIMENSION K DOES NOT INCLUDE DAMBAR

PROTRUSION/INTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN

EXCESS OF K DIMENSION AT MAXIMUM

MATERIAL CONDITION. DAMBAR INTRUSION

SHALL NOT REDUCE DIMENSION K BY MORE

THAN 0.07 (0.002) AT LEAST MATERIAL

CONDITION.
6 TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.
7 DIMENSION A AND B ARE TO BE DETERMINED

AT DATUM PLANE –W–.

H

A

B

85

41

F

M

K8X REF

S

U

M

0.12 (0.005) V

S

T

L

L/2

PIN 1
IDENT

S

U

M

0.20 (0.008) T

–V–

–U–

D

C

0.076 (0.003)

G

–T–

SEATING
PLANE

DETAIL E

DETAIL E

–W–

N

N

0.25 (0.010)

K

J

J1

K1

SECTION N–N

L 7.65 7.90 0.301 0.311
M 0 8 0 8

D SUFFIX

PLASTIC PACKAGE

CASE 751–06

(SO–8)

ISSUE T

SEATING
PLANE

1

4

58

A0.25MCB

SS

0.25MB

M

h

q

C

X 45

_

L

DIM MIN MAX

MILLIMETERS

A 1.35 1.75
A1 0.10 0.25
B 0.35 0.49
C 0.19 0.25
D 4.80 5.00

E

1.27 BSCe

3.80 4.00

H 5.80 6.20

h

0 7

L 0.40 1.25

q

0.25 0.50

__

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETER.

3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.

5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

D

E

H

A

B

e

B

A1

C

A

0.10

OUTLINE DIMENSIONS

MC12148

5

MOTOROLA RF/IF DEVICE DATA

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. “T ypical” 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
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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
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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.

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MC12148/D

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