MC12148中文资料

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MC12148

SEMICONDUCTORTECHNICAL DATALOW POWER

VOLTAGE CONTROLLED

OSCILLATOROrder this document by MC12148/D

8

1GND

VCC7

2VCCO

AGC6

3Out

TANK5

4GND

Vref

DeviceOperatingTemperature RangePackageORDERING INFORMATION

MC12148DMC12148SDTA = –40° to +85°CSO–8SSOP–8D SUFFIXPLASTIC PACKAGECASE 751(SO–8)81

(Top View)PIN CONNECTIONSSD SUFFIXPLASTIC PACKAGECASE 940(SSOP–8)81Low Power

Voltage Controlled Oscillator

The MC12148 requires an external parallel tank circuit consisting of theinductor (L) and capacitor (C). A varactor diode may be incorporated into thetank circuit to provide a voltage variable input for the oscillator (VCO). Thisdevice may also be used in many other applications requiring a fixedfrequency clock.The MC12148 is ideal in applications requiring a local oscillator. Systemsinclude electronic test equipment and digital high–speedtelecommunications.The MC12148 is based on the VCO circuit topology of the MC1648. TheMC12148 has been realized utilizing Motorola’s MOSAIC III advancedbipolar process technology which results in a design which can operate at amuch higher frequency than the MC1648 while utilizing half the current.Please consult with the MC1648 data sheet for additional backgroundinformation.The ECL output circuitry of the MC12148 is not a traditional open emitteroutput structure and instead has an on–chip termination resistor with anominal value of 500 ohms. This facilitates direct ac–coupling of the outputsignal into a transmission line. Because of this output configuration, anexternal pull–down resistor is not required to provide the output with a dccurrent path. This output is intended to drive one ECL load. If the userneeds to fanout the signal, an ECL buffer such as the MC10EL16 LineReceiver/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. 1997Rev 5BLOCK DIAGRAM(Typical Test Circuit)

7865

2134GNDVCCOOutGND

VCCAGCTANKVref1200Ω*Fout

Vin51KΩ0.1µF* The 1200 Ω resistorand the scopetermination impedanceconstitute a 25:1attenuator probe.0.1µF0.01µF100µF

0.1µF100µF0.01µF0.1µFVCCO

VCC = 4.5 to 5.5 V元器件交易网www.cecb2b.comMC12148

2MOTOROLA RF/IF DEVICE DATAMAXIMUM RATINGS

ParameterSymbolValueUnit

Power Supply Voltage, Pins 1, 7VCC–0.5 to 7.0Vdc

Operating Temperature RangeTA–40 to 85°C

Storage Temperature RangeTstg–65 to 150°C

NOTE:ESD data available upon request.

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

CharacteristicSymbolMinTypMaxUnit

Supply CurrentICC–1925mA

Output Level HIGH (1.0 MΩ Impedance)VOH3.954.174.61V

Output Level LOW (1.0 MΩ Impedance)VOL3.043.413.60V

CSR @ 25 kHz Offset, 1.0 Hz BWL(f)––90–dBc/Hz

CSR @ 1.0 MHz Offset, 1.0 Hz BWL(f)––120–dBc/Hz

SNR (Signal to Noise Ratio from Carrier)SNR–40–dB

Frequency StabilitySupply DriftFsts–3.6–KHz/mV

Thermal DriftFstt–0.1–KHz/°C

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

Figure 1. Circuit Schematic

2AGC5GND3TANK4Vref8GNDVCC1VCCO7

Q4Q3Q2Q1

Q5D1

Q8Q7Q6Q9

Q10Q11

D26OUT

510Ω元器件交易网www.cecb2b.comMC12148

3MOTOROLA RF/IF DEVICE DATAL (f) [dBc/Hz] versus f [Hz]Figure 2. Typical Evaluation Results(CSR MC12148 5.0 Vdc; VCC @ 25°C; 930 MHz CW)

1K–140dBc/Hz

10K100K1M10M100M–120–100–80–60–40–200

Tank Component SuppliersBelow 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 manufacturesimilar products.

Coilcraft Inductors A01T thru A05TCoilcraft–Coilcraft, Inc.1102 Silver Lake Rd.Gary, Illinois 60013708–639–6400Loral Tuning Varactors GC1500 SeriesLoral16 Maple RoadChelmsford, Massachusetts 01824508–256–8101 or 508–256–4113Alpha Tuning Diodes DVH6730 SeriesAlpha Semiconductor Devices Division20 Sylvan RoadWoburn, MA 01801617–935–5150

* 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.元器件交易网www.cecb2b.comMC12148

4MOTOROLA RF/IF DEVICE DATASD SUFFIXPLASTIC PACKAGECASE 940-03(SSOP–8)ISSUE B

DIMAMINMAXMINMAXINCHES2.873.130.1130.123MILLIMETERS

B5.205.380.2050.212C1.731.990.0680.078D0.050.210.0020.008F0.630.950.0240.037G0.65 BSC0.026 BSCH0.440.600.0170.023J0.090.200.0030.008J10.090.160.0030.006K0.250.380.0100.015K10.250.330.0100.013____NOTES:1DIMENSIONING AND TOLERANCING PER ANSIY14.5M, 1982.2CONTROLLING DIMENSION: MILLIMETER.3DIMENSION A DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS. MOLD FLASHOR GATE BURRS SHALL NOT EXCEED 0.15(0.006) PER SIDE.4DIMENSION B DOES NOT INCLUDE INTERLEADFLASH OR PROTRUSION. INTERLEAD FLASH ORPROTRUSION SHALL NOT EXCEED 0.15 (0.006)PER SIDE.5DIMENSION K DOES NOT INCLUDE DAMBARPROTRUSION/INTRUSION. ALLOWABLE DAMBARPROTRUSION SHALL BE 0.13 (0.005) TOTAL INEXCESS OF K DIMENSION AT MAXIMUMMATERIAL CONDITION. DAMBAR INTRUSIONSHALL NOT REDUCE DIMENSION K BY MORETHAN 0.07 (0.002) AT LEAST MATERIALCONDITION.6TERMINAL NUMBERS ARE SHOWN FORREFERENCE ONLY.7DIMENSION A AND B ARE TO BE DETERMINEDAT DATUM PLANE –W–.