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Freescale Semiconductor Electronic Components Datasheet

MC33493A Datasheet

PLL Tuned UHF Transmitter

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MC33493A pdf
Freescale Semiconductor
Data Sheet: Product Preview
PLL Tuned UHF Transmitter
for Data Transfer
Applications
• Selectable frequency bands:
315—434 MHz and 868—928 MHz
• On Off Keying (OOK) and Frequency Shift Keying
(FSK) modulation
• Adjustable output power range
• Fully integrated voltage control regulator (VCO)
• Supply voltage range: 1.9—3.6 V
• Very low standby current: 0.1 nA @ TA= 25 °C
• Low-supply voltage shutdown
• Data clock output for microcontroller
• Extended temperature range: –20 to 85 °C
• Low external component count
• Typical application compliant with European
Telecommunications Standards Institute (ETSI)
standard
Document Number: MC33493A
Rev. 2, 07/2007
MC33493A
PIN CONNECTIONS
DATACLK
DATA
BAND
GND
XTAL1
XTAL0
REXT
1
2
3
4
5
6
7
14 MODE
13 ENABLE
12 VCC
11 GNDRF
10 RFOUT
9 VCC
8 CFSK
Ordering Information
Device
Ambient
Temperature
Range
Package
MC33493ADTB –20°C to 85°C TSSOP14
MC3493ADTBE –20°C to 85°C TSSOP14
(ROHS)
This document contains information on a product under development. Freescale reserves the
right to change or discontinue this product without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.


Freescale Semiconductor Electronic Components Datasheet

MC33493A Datasheet

PLL Tuned UHF Transmitter

No Preview Available !

MC33493A pdf
Table of Contents
1 Transmitter Functional Description . . . . . . . . . . . . . . . . . . . . . .4
2 Phase Locked Loop and Local Oscillator . . . . . . . . . . . . . . . . .4
3 RF Output Stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5 Microcontroller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
6 State Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
7 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
8 Data Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
9 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
10 Radio Frequency (RF) Output Spectrum . . . . . . . . . . . . . . . .11
11 Output Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . .14
12 Complete Application Schematic and
PCB for OOK Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
13 Complete Application Schematic and
PCB for FSK Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
14 Recommendations for FSK Modulation . . . . . . . . . . . . . . . . .19
15 Case Outline Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
List of Figures
Figure 1. Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2. Crystal Pulling Configurations. . . . . . . . . . . . . . . . . . . . 5
Figure 3. State machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Signals Waveform and Timing Definition . . . . . . . . . . . 7
Figure 5. RF Spectrum at 434 MHz Frequency Band
Displayed with a 5 MHz Span . . . . . . . . . . . . . . . . . . . 11
Figure 6. RF Spectrum at 434 MHz Frequency Band
Displayed with a 50 MHz Span . . . . . . . . . . . . . . . . . . 11
Figure 7. RF Spectrum at 434 MHz Frequency Band
Displayed with a 1.5 GHz Span . . . . . . . . . . . . . . . . . 12
Figure 8. RF Spectrum at 434 MHz Band
for a 70 kHz FSK Deviation at 4.8 kbit/s . . . . . . . . . . . 12
Figure 9. Output Power Measurement Configurations . . . . . . . . 13
Figure 10.Output Model and Matching Network
for 434 MHz Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 11.Output Power at 434 MHz Band vs Rext Value . . . . . 14
Figure 12.Application Schematic for OOK Modulation,
434 MHz Frequency Band . . . . . . . . . . . . . . . . . . . . . . 15
Figure 13.Two-Button Keyfob Board Layout . . . . . . . . . . . . . . . . 16
Figure 14.Application Schematic for FSK Modulation,
Serial Configuration, 434 MHz Frequency Band . . . . . 17
Figure 15.Application PCB Layout for FSK Modulation,
Serial Configuration, 434 MHz Frequency Band . . . . . 18
Figure 16.Crystal Load Capacitance Contributors Schematic . . 19
Figure 17.Case Outline Dimensions . . . . . . . . . . . . . . . . . . . . . 20
List of Tables
Table 1. Pin Function Description . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . 3
Table 3. Band Selection and Associated Divider Ratios . . . . . . . 4
Table 4. DATACLK Frequency vs Crystal Oscillator Frequency. . 5
Table 5. Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. External Components Description for OOK. . . . . . . . . 15
Table 7. Typical Crystal Characteristics (SMD Package) . . . . . 16
Table 8. External Components Description for FSK . . . . . . . . . 17
Table 9. Crystal Pulling Capacitor Values vs
Carrier Frequency Total Deviation -1- . . . . . . . . . . . . . 18
Table 10.Crystal Pulling Capacitor Values vs
Carrier Frequency Total Deviation -2- . . . . . . . . . . . . . 18
Table 11.Pads and Tracks Parasitic Values . . . . . . . . . . . . . . . . 19
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 2
2 Freescale Semiconductor


Part Number MC33493A
Description PLL Tuned UHF Transmitter
Maker Freescale Semiconductor
Total Page 22 Pages
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