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–.