MC12147D Motorola, MC12147D Datasheet

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MC12147D

Manufacturer Part Number
MC12147D
Description
LOW POWER VOLTAGE CONTROLLED OSCILLATOR BUFFER
Manufacturer
Motorola
Datasheet

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Low Power Voltage
Controlled Oscillator Buffer
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.
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 V CC 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.
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
V CC
CNTL
TANK
V REF
QB
GND
Q
The MC12147 is intended for applications requiring high frequency signal
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
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
External components required for the MC12147 are: (1) tank circuit (LC
Pin
– Phase Noise –105 dBc/Hz @ 100 kHz Offset
– Tuning Voltage Sensitivity of 20 MHz/V
Power Supply
Amplitude Control for Q, QB Output Pair
Tank Circuit Input
Bias Voltage Output
Open Collector Output
Ground
Open Collector Output
Function
MC12147D
MC12147SD
Motorola, Inc. 1997
Device
VOLTAGE CONTROLLED
OSCILLATOR BUFFER
ORDERING INFORMATION
MC12147
PLASTIC PACKAGE
PLASTIC PACKAGE
PIN CONNECTIONS
V CC
SEMICONDUCTOR
Temperature Range
NC
T A = – 40 to +85 C
TECHNICAL DATA
Order this document by MC12147/D
LOW POWER
8
1
SD SUFFIX
D SUFFIX
CASE 751
8
CASE 940
(SSOP–8)
Operating
8
CNTL
(SO–8)
(Top View)
Q
7
2
1
1
TANK
GND
6
3
V REF
QB
5
4
Package
SSOP–8
SO–8
Rev 2

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MC12147D Summary of contents

Page 1

... SD SUFFIX PLASTIC PACKAGE CASE 940 (SSOP–8) PIN CONNECTIONS NC Q GND CNTL TANK V REF (Top View) ORDERING INFORMATION Operating Temperature Range Device Package MC12147D SO– – +85 C SSOP–8 MC12147SD Motorola, Inc. 1997 Rev 2 ...

Page 2

... 4.8 T stg – 100 L – (f) L (f) – F sts – f stt – Typ Max Unit 22.5 V 2.7 – 2.3 2.4 V 5.5 – 5.0 5.1 20 – MHz/V – 1300 MHz –85 – dBc/Hz –105 – dBc/Hz 0.8 – MHz/V 50 – KHz/ C MOTOROLA RF/IF DEVICE DATA ...

Page 3

... An additional benefit to this configuration is that additional regulation/ filtering can TANK V REF MOTOROLA RF/IF DEVICE DATA MC12147 OPERATIONAL CHARACTERISTICS be incorporated into the V CC line without compromising the tuning range of the VCO. With the AC–coupled tank configuration, the V tune voltage can be greater than the V CC voltage supplied to the device ...

Page 4

... Note: There are many suppliers of high performance Equation 4 varactors and inductors an Motorola can not recommend one vendor over another. The Q (quality factor) of the components in the tank circuit has a direct impact on the resulting phase noise of the oscillator ...

Page 5

... Adjust, as necessary, component values – L,C1, and Cb to compensate for parasitic board effects. 9. Evaluate over temperature and voltage limits. MOTOROLA RF/IF DEVICE DATA MC12147 10. Perform worst case analysis of tank component variation to insure proper VCO operation over full temperature and voltage range and make any adjustments as needed ...

Page 6

... VCO Output 1 L2a C3b Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç L2b C2b VCO Output 2 C6b = Via to/or Ground Plane Ç Ç Ç = Via to/or Power Plane Ç Ç Ç Ç Ç Ç MOTOROLA RF/IF DEVICE DATA ...

Page 7

... Figure 5. Typical Supply Pushing, 750MHz Tank 750 748 746 744 742 740 738 736 734 732 730 2.7 3.0 3.3 MOTOROLA RF/IF DEVICE DATA MC12147 1.5 2.0 2.5 3.0 3.5 Tuning Voltage (V) 3.6 3.9 4.2 4 Supply Voltage (V) –40 C +25 C +85 C 4.0 4.5 5.0 –40 C +25 C +85 C 4.8 5.1 5.4 7 ...

Page 8

... CNTL–N/C –10 2.7 3.0 3.3 Figure 7. Typical Current Drain versus Supply, 750 MHz Tank CNTL–N/C 5 2.7 3.0 3.3 8 MC12147 3.6 3.9 4 Supply Voltage (V) CNTL to GND 3.6 3.9 4.2 4 Supply Voltage (V) –40 C +25 C +85 C +25 C (LP) 4.5 4.8 5.0 –40 C +25 C +85 C +25 C (LP) 4.8 5.1 5.4 MOTOROLA RF/IF DEVICE DATA ...

Page 9

... Figure 9. Typical Supply Pushing, 1200 MHz Tank 1210 1208 1206 1204 1202 1200 1198 1196 1194 1192 1190 2.7 3.0 3.3 MOTOROLA RF/IF DEVICE DATA MC12147 ( 5.0 V) 1.8 2.4 3.0 3.6 Tuning Voltage (V) 3.6 3.9 4.2 4.5 4 Supply Voltage (V) –40 C +25 C +85 C 4.2 4.8 –40 C +25 C +85 C 5.1 5.4 9 ...

Page 10

... Figure 11. Typical VCO Output Spectrum ATTEN 10 RL 0dBm 10dB/ 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 START 1.0MHz RBW 1.0MHz VBW 1.0MHz 10 MC12147 3.6 3.9 4.2 4 Supply Voltage (V) MOTOROLA RF/IF DEVICE DATA –40 C +25 C +85 C 4.8 5.0 MARKER 909MHz –7.1dBm STOP 10.0GHz SWP 200ms ...

Page 11

... Figure 13. Typical Phase Noise Plot, 1200 MHz Tank HP 3048A CARRIER 0 –25 –50 –75 –100 –125 –150 –170 100 1K MOTOROLA RF/IF DEVICE DATA MC12147 784.2MHz 10K 100K 1M L (f) [dBc/Hz] vs f[Hz] 1220MHz 10K 100K 1M L (f) [dBc/Hz] vs f[Hz] 10M 40M 10M 40M 11 ...

Page 12

... AT DATUM PLANE –W–. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 2.87 3.13 0.113 0.123 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 L 7.65 7.90 0.301 0.311 MOTOROLA RF/IF DEVICE DATA ...

Page 13

... 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. “ ...

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