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MC12147D Folha de dados(PDF) 1 Page - Motorola, Inc |
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MC12147D Folha de dados(HTML) 1 Page - Motorola, Inc |
1 / 12 page 8 1 NC VCC 7 2 Q CNTL 6 3 GND TANK 5 4 QB VREF Device Operating Temperature Range Package MC12147 SEMICONDUCTOR TECHNICAL DATA LOW POWER VOLTAGE CONTROLLED OSCILLATOR BUFFER ORDERING INFORMATION MC12147D TA = –40 to 85°C SO–8 D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) 8 1 (Top View) PIN CONNECTIONS Order this document by MC12147/D 1 MOTOROLA RF/IF DEVICE DATA Low Power Voltage Controlled Oscillator Buffer The MC12147 is intended for applications requiring high frequency signal generation up to 1300 MHz. An external tank circuit is used to determine the desired frequency of operation. The VCO is realized using an emitter–coupled pair topology. The MC12147 can be used with an integrated PLL IC such as the MC12202 1.1 GHz Frequency Synthesizer to realize a complete PLL sub–system. The device is specified to operate over a voltage supply range of 2.7 to 5.5 V. It has a typical current consumption of 13 mA at 3.0 V which makes it attractive for battery operated handheld systems. DEVICE TO BE PHASED OUT. NOTE: The MC12147 is NOT suitable as a crystal oscillator. • Operates Up to 1.3 GHz • Space–Efficient 8–Pin SOIC or SSOP Package • Low Power 13 mA Typical @ 3.0 V Operation • Supply Voltage of 2.7 to 5.5 V • Typical 900MHz Performance – Phase Noise –105 dBc/Hz @ 100 kHz Offset – Tuning Voltage Sensitivity of 20 MHz/V • Output Amplitude Adjustment Capability • Two High Drive Outputs With a Typical Range from –8.0 to –2.0 dBm The device has two high frequency outputs which make it attractive for transceiver applications which require both a transmit and receive local oscillator (LO) signal. The outputs Q and QB are available for servicing the receiver IF and transmitter up–converter single–ended. In receiver applications, the outputs can be used together if it is necessary to generate a differential signal for the receiver IF. Because the Q and QB outputs are open collector, terminations to the VCC supply are required for proper operation. Since the outputs are complementary, BOTH outputs must be terminated even if only one is needed. The Q and QB outputs have a nominal drive level of –8dBm to conserve power. If addition signal amplitude is needed, a level adjustment pin (CNTL) is available, which when tied to ground, boosts the nominal output levels to –2.0 dBm. External components required for the MC12147 are: (1) tank circuit (LC network); (2) Inductor/capacitor to provide the termination for the open collector outputs; and (3) adequate supply voltage bypassing. The tank circuit consists of a high–Q inductor and varactor components. The preferred tank configuration allows the user to tune the VCO across the full supply range. VCO performance such as center frequency, tuning voltage sensitivity, and noise characteristics are dependent on the particular components and configuration of the VCO tank circuit. PIN NAMES Pin Function VCC CNTL TANK VREF QB GND Q Power Supply Amplitude Control for Q, QB Output Pair Tank Circuit Input Bias Voltage Output Open Collector Output Ground Open Collector Output © Motorola, Inc. 1999 Rev 4 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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