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| MOTOROLA Freescale Semiconductor, Inc. Semiconductor Technical Data Order Number: MC33492/D Rev. 3.3, 06/2001 Preliminary PLL Tuned UHF Transmitter for Data Transfer Applications * * * * * * * * * * * Switchable frequency bands 315-434MHz and 868MHz OOK modulation Adjustable output power range Fully integrated VCO Supply voltage range: 1.9-3.6V Very low standby current: 0.1nA @ TA =25C Low supply voltage shutdown Data clock output for microcontroller Extended temperature range: -40C to 125C Low external component count Typical application compliant with ETSI standard TANGO3 MC33492 Freescale Semiconductor, Inc... PIN CONNECTIONS DATACLK DATA BAND GND XTAL1 XTAL0 REXT 1 2 3 4 5 6 7 14 13 12 11 10 9 8 MODE ENABLE VCC GNDRF RFOUT VCC CFSK Ordering Information Device MC33492 DTB Ambiant Temperature Range -40C to 125C Package TSSOP14 Figure 1: Simplified block diagram This document contains information on a new product under development. Motorola reserves the right to change or discontinue this product without notice. (c) Motorola, Inc., 2001. All rights reserved. For More Information On This Product, Go to: www.freescale.com TM Non Disclosure Agreement Required MC33492 Freescale Semiconductor, Inc. PIN FUNCTION DESCRIPTION Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Name DATACLK DATA BAND GND XTAL1 XTAL0 REXT CFSK VCC RFOUT GNDRF VCC ENABLE MODE Description Clock output to the microcontroller Data input Frequency band selection Ground Reference oscillator input Reference oscillator output Power amplifier output current setting input Non connected Power supply Power amplifier output Power amplifier ground Power supply Enable input Modulation type selection input ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Voltage Allowed on Each Pin ESD HBM Voltage Capability on Each Pin (note 1) ESD MM Voltage Capability on Each Pin (note 2) Solder Heat Resistance Test (10 s) Storage Temperature Junction Temperature Notes: 1 Human Body model, AEC-Q100-002 Rev. C. 2 Machine Model, AEC-Q100-003 Rev. D. Symbol VCC Value VGND - 0.3 to 3.7 VGND - 0.3 to VCC + 0.3 2000 150 260 Unit V V V V C C C Ts Tj -65 to +150 +150 For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 2 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. TRANSMITTER FUNCTIONAL DESCRIPTION MC33492 is a PLL tuned low power UHF transmitter. The different modes of operation are controlled by the microcontroller through several digital input pins. The power supply voltage ranges from 1.9V to 3.6V allowing operation with a single lithium cell. PHASE LOCKED LOOP AND LOCAL OSCILLATOR The VCO is a completely integrated relaxation oscillator. The Phase Frequency Detector (PFD) and the loop filter are fully integrated. The exact output frequency is equal to: fRFOUT = fXTAL x PLL divider ratio. The frequency band of operation is selected through the BAND pin. Table 1 provides details for each frequency band selection. Table 1: Frequency band selection and associated divider ratios Frequency PLL divider Crystal oscillator BAND input level band (MHz) ratio frequency (MHz) 315 9.84 High 32 434 13.56 Low 868 64 An out-of-lock function is performed by monitoring the PFD output voltage. When it exceeds its limits, the RF output stage is disabled. RF OUTPUT STAGE The output stage is a single ended square wave switched current source. Harmonics will be present in the output current drive. Their radiated absolute level depends on the antenna characteristics and output power. Typical application demonstrates compliance to ETSI standard. A resistor Rext connected to the REXT pin controls the output power allowing a tradeoff between radiated power and current consumption. The output voltage is internally clamped to Vcc 2Vbe (typ. Vcc 1.5V @ TA=25C). MODULATION A low logic level has to be applied on pin MODE, to select the On Off Keying (OOK) modulation. This modulation is performed by switching on/off the RF output stage. The logic level applied on pin DATA controls the output stage state: DATA=0 -> output stage off DATA=1 -> output stage on MICROCONTROLLER INTERFACE Four digital input pins (ENABLE, DATA, BAND and MODE) enable the circuit to be controlled by a microcontroller. It is recommended to configure the band frequency and the modulation type before enabling the circuit. In a typical application the input pin MODE is hardwired to ground. To reduce total current consumption, it is recommended to connect pin BAND according to the following table 2. Table 2: Digital pins connecting recommendation 434MHz Frequency band BAND = I/O or ENABLE 868MHz Frequency band BAND = GND One digital output (DATACLK) provides to the microcontroller a reference frequency for data clocking. This frequency is equal to the crystal oscillator frequency divided by 64 (see table 3). Table 3: DATACLK frequency versus crystal oscillator frequency Crystal oscillator frequency (MHz) DATACLK frequency (kHz) 9.84 154 13.56 212 For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 3 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. STATE MACHINE Figure 2 details the main state machine. Figure 2: Main state machine Power ON AND ENABLE=0 State 1 Standby mode State 2 PLL enabled but out of lock in range PLL in lock in range State 6 Shutdown mode VBattery < VShutdown State 4 Transmission mode PLL out of lock in range PLL in lock in range State 5 PLL out of lock in range No RF output State 1: The circuit is in standby mode and draws only a leakage current from the power supply. State 2: In this state, the PLL is enabled but out of the lock in range. Therefore the RF output stage is switched off preventing any data transmission. Data clock is available on pin DATACLK. In normal operation, this state is transitional. State 4: In this state, the PLL is within the lock in range. If t 4 Non Disclosure Agreement Required ENABLE=0 ENABLE=1 ENABLE=0 Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. Figure 3 shows the waveforms of the main signals for a typical application cycle Figure 3: Signals waveforms and timings definition ENABLE DATACLK tDATACLK_settling tPLL_lock_in DATA fcarrier State 1 State 2 State 4 fcarrier State 1 RFOUT : PLL locked POWER MANAGEMENT When the battery voltage falls below the shutdown voltage threshold (VSDWN) the whole circuit is switched off. It has to be noted that after this shutdown, the circuit is latched until a low level is applied on pin ENABLE (see state 6 of the state machine). DATA CLOCK At start-up data clock timing is valid after the data clock settling time. As clock is switched off asynchronously the last period length cannot be guaranteed. For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 5 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. ELECTRICAL CHARACTERISTICS Unless otherwise specified: Vcc=3V, Rext=12k, operating temperature range TA=-40C to +125C, RF output frequency fcarrier=433.92MHz, reference frequency freference=13.56MHz, output load = 50 resistor (see figure 7). Values refer to the circuit shown in the recommended application schematic (see figure 10). Typical values reflect average measurement at VCC=3V and TA=25C. Limits Parameter 1 1.1 1.2 1.3 1.4 1.7 1.5 1.6 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 Shutdown Voltage Threshold Supply Voltage TA=-40C TA=-20C TA=25C TA=60C TA=85C TA=125C Supply Current in Transmission Mode Supply Current in Standby Mode Test Conditions, Comments Min. General Parameters Typ. Max. Unit TA=60C TA=85C TA=125C 315 & 434 bands, continuous wave, TA=25C 315 & 434 bands, DATA=0, -40CTA125C 868MHz band, DATA=0, -40CTA125C 315 & 434 bands, continuous wave, -40CTA125C 868MHz band, continuous wave, -40CTA125C - 7 40 800 11.6 4.4 4.6 11.6 11.8 3 2.04 1.99 1.86 1.76 1.68 1.56 30 100 1700 13.5 6.0 6.2 14.9 15.1 3.6 2.11 2.06 1.95 1.84 1.78 1.67 nA nA nA mA mA mA mA mA V V V V V V V For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 6 Non Disclosure Agreement Required TA25C - 0.1 5 nA Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. ELECTRICAL CHARACTERISTICS Unless otherwise specified: Vcc=3V, Rext=12k, operating temperature range TA=-40C to +125C, RF output frequency fcarrier=433.92MHz, reference frequency freference=13.56MHz, output load = 50 resistor (see figure 7). Values refer to the circuit shown in the recommended application schematic (see figure 10). Typical values reflect average measurement at VCC=3V and TA=25C. Limits Parameter 2 2.1 2.2 2.3 Output Power 2.4 2.8 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.41 2.26 2.27 2.30 Phase Noise 2.31 2.32 PLL Lock in Time, tPLL_lock_in Spurious Level @ fcarrier f DATACLK Spurious Level @ fcarrier f reference Spurious Level @ fcarrier/2 Harmonic 3 Level Harmonic 2 Level Current & Output Power Variation vs Rext value Rext value 315 & 434MHz bands, with 50 matching network 868MHz band, with 50 matching network 315 & 434MHz bands, -40CTA125C 868MHz band, -40CTA125C 315 & 434MHz bands, with 50 matching network 315 & 434MHz bands, with 50 matching network 868MHz band, with 50 matching network 315 & 434MHz bands 868MHz band 315 & 434MHz bands, with 50 matching network 868MHz band, with 50 matching network 315 & 434MHz bands 868MHz band 315 & 434MHz bands 868MHz band 315 MHz band 434MHz band 868MHz band 315MHz band 434MHz band 868MHz band 315 & 434MHz bands, 175kHz from f carrier 868MHz band, 175kHz from f carrier fcarrier within 30kHz from the final value, crystal series resistor=150 Test Conditions, Comments Min. RF Parameters 12 -3 -7 5 1 0 -3 -0.35 -34 -49 -23 -38 -32 -57 -21 -48 -36 -29 -37 -44 -37 -62 -80 -45 -75 -73 350 21 3 0 -17 -27 -15 -39 -24 -17 -30 -34 -27 -53 -60 -39 -68 -66 1500 k Typ. Max. Unit Freescale Semiconductor, Inc... dBm dBm dBm dB/k mA/k dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc dBc/Hz dBc/Hz s For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 7 Non Disclosure Agreement Required dBm MC33492 Freescale Semiconductor, Inc. ELECTRICAL CHARACTERISTICS Unless otherwise specified: Vcc=3V, Rext=12k, operating temperature range TA=-40C to +125C, RF output frequency fcarrier=433.92MHz, reference frequency freference=13.56MHz, output load = 50 resistor (see figure 7). Values refer to the circuit shown in the recommended application schematic (see figure 10). Typical values reflect average measurement at VCC=3V and TA=25C. Limits Parameter 2.33 2.34 2.35 2.40 2.41 XTAL1 Input Capacitance Crystal Resistance Modulation Depth Data Rate Data to RF delay difference between falling and rising edges Manchester coded From 50% of data edge to corresponding RF signal enveloppe edge (see note 1) Test Conditions, Comments Min. 75 - Unit Typ. 1 20 90 5 Max. 200 10 8 pF dBc Freescale Semiconductor, Inc... 3 s Note 1: This parameter can have a slight impact on data duty cycle. 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 Input Low Voltage Input High Voltage Input Hysteresis Voltage Input Current ENABLE Pull Down Resistor DATACLK Output Low Voltage Cload = 2pF DATACLK Output High Voltage DATACLK Rising Time DATACLK Falling Time DATACLK Settling Time, tDATACLK_settling Cload = 2pF, measured from 20% to 80% of the voltage swing 45% < Duty Cycle fDATACLK < 55% Pins BAND, MODE, DATA = 1 Pins BAND, MODE, ENABLE, DATA Microcontroller Interfaces 0 0.7 x VCC 0 0.75 x VCC - 180 250 150 800 0.3 x VCC VCC 150 100 0.25 x VCC VCC 500 400 1800 V V mV nA k V V ns ns s For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 8 Non Disclosure Agreement Required kBd MC33492 Freescale Semiconductor, Inc. RF OUTPUT SPECTRUM Following are spectrums of transmitter carrier, measured in conduction. Three different spans have been used. The 5MHz span spectrum (figure 4) shows phase noise response close to the RF carrier, and the noise suppression within the PLL loop bandwidth. The 50MHz span spectrum (figure 5) shows both phase noise and reference spurious. Finally figure 6 shows second and third harmonics of carrier. All these spectrums are measured in OOK modulation, at DATA=1. Figure 4: RF spectrum at 434MHz frequency band displayed with a 5MHz span Resolution bandwidth: 100kHz Resolution bandwidth: 30kHz For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 9 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. Figure 5: RF spectrum at 434MHz frequency band displayed with a 50MHz span Figure 6: RF spectrum at 434MHz frequency band displayed with a 1.5GHz span For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 10 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. OUTPUT POWER MEASUREMENT The RF output levels given in the electrical characteristics section are measured whith a 50 load directly connected to the pin RFOUT as shown below in figure 7. This wideband coupling method gives results independant of the application. Figure 7: Output power measurement configurations VCC Impeder: TDK MMZ1608Y102CTA00 RFOUT 100pF RF output The configuration shown in figure 8-a provides a better efficiency in terms of output power and harmonics rejection. Schematic on figure 8-b gives the equivalent circuit of the pin RFOUT and impeder as well as the matching network components for 434MHz frequency band. Note that the impeder is moved to the load side to decrease its influence (similar to DC bias through the antenna). Figure 8: Ouput characteristic and matching network for 434MHz frequency band VCC Impeder: TDK MMZ1608Y102CTA00 RFOUT (a) Matching Network RF Output 50 Matching network 330pF C3 3k (b) L1 39nH 50 C0 1.5pF R0 250 Ri Impeder RL Load RFOUT pin Figure 9 gives the output power versus the Rext resistor value with 50 load and with matching network. For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 11 Non Disclosure Agreement Required 50 Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. Figure 9: Output power at 434MHz frequency band versus Rext value Output power measurement in typical conditions (434MHz - Vcc=3V - 25C) REXT SPECIFIED RANGE 8 6 Output power when matched (dBm) -0.35db/k # -0.35mA/k 4 2 RFOUT Level (dBm) Freescale Semiconductor, Inc... -2 -4 Output power on 50 load (dBm) -6 6 9 12 15 Rext (k ) 18 21 24 The 50 matching network used for the 868MHz band is similar to the 434MHz, except components values: L1 is changed to 8.2nH and C3 to 470pF The expected gain of this 868MHz matching network is 4dB (typical) compared to unmatched boards. For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 12 Non Disclosure Agreement Required 0 MC33492 Freescale Semiconductor, Inc. APPLICATION SCHEMATIC Figures 10 show application schematic for the 315 & 434MHz frequency bands. For 868MHz band application, the input pin BAND must be wired to ground. See component description on table 4. Figure 10: Application schematic for 315 & 434MHz frequency bands Component Y1 R2 C6 C10 C7 C8 C11 Table 4: External components description Function Value For 315MHz band: 9.84, see table 5 For 434MHz band: 13.56, Crystal see table 5 For 868MHz band: 13.56, see table 5 RF output level setting 12 resistor (Rext) Crystal load capacitor Power supply decoupling capacitor Low pass filter capacitor for spurious reduction at freference 8.2 4.7 22 100 47 Unit MHz MHz MHz k pF F nF pF pF Examples of crystal reference are given below (see characteristics on table 5) for different application bands: - at 315MHz band (freference = 9.84375MHz, -40CTA85C): NDK LN-G102-950, - at 434/868MHz bands (freference = 13.56MHz, -40CTA125C): NDK NX8045GA S1-40125-8050-12 Table 5: Recommended crystal characteristics (SMD ceramic package) Parameter NDK LN-G102-950 (315MHz) NDK S1-40125-8050-12 (434 & 868MHz) Load capacitance 12 12 Motional capacitance 3.33 4.4 Static capacitance 1.05 1.5 Loss resistance 28 18.5 Unit pF fF pF For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 13 Non Disclosure Agreement Required Freescale Semiconductor, Inc... MC33492 Freescale Semiconductor, Inc. COMPLETE APPLICATION SCHEMATIC WITH PCB Figure 11 gives a complete application schematic using a Motorola MC68HC908RK2 microcontroller. fcarrier= 433.92MHz. C2 to C5 capacitors can be removed if switches debounce is done by software. Figure 11: Complete application schematic for 434MHz frequency band Vbat Vbat LED1 1 SW1 SW1a SW2 SW2a B1 R1 750 2 C2 C3 C4 C5 2.2nF 2.2nF 2.2nF 2.2nF Vbat U1 2 3 13 12 11 10 9 8 C8 100pF C9 2.2pF DATA BAND GND XTAL1 XTAL0 REXT MC33492 ENABLE VCC GNDRF RFOUT VCC CFSK U2 1 2 3 4 5 6 7 8 9 10 PTA0 PTB0/MCLK PTB1 PTB2/TCH0 PTB4/TCH1 PTB5 PTB3/TCLK OSC1 OSC2 VSS MC68HC908RK2 PTA1/KBD1 PTA2/KBD2 PTA3/KBD3 PTA4/KBD4 PTA5/KBD5 PTA6/KBD6 PTA7 RST IRQ1 VDD 20 19 18 17 16 15 14 13 12 11 Vbat C8 100nF Freescale Semiconductor, Inc... C6 8.2pF Y1 4 5 6 13.56MHz 7 R2 12K Figure 12 shows a two buttons keyfob board. Real size is 30 x 45 millimeters. Figure 12: Two button keyfob board layout Battery For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 14 Non Disclosure Agreement Required 1 DATACLK MODE 14 C7 22nF MC33492 Freescale Semiconductor, Inc. CASE OUTLINE DIMENSIONS 14X K REF NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DIM A B C D F G H J J1 K K1 L M M 0.10 (0.004) T U S V S 0.15 (0.006)T U S N 2X L/2 14 8 0.25 (0.010) M L PIN 1 IDENT. 1 7 B -U- N F DETAIL E K K1 J J1 SECTION N-N -W- 0.15 (0.006)T U S C 0.10 (0.004) -T- SEATING D PLANE G H DETAIL E CASE 948G-01 ISSUE O For More Information On This Product, Go to: www.freescale.com PLL Tuned UHF Transmitter for Data Transfer Applications 15 Non Disclosure Agreement Required A -V- Freescale Semiconductor, Inc... MILLIMETERS MIN MAX 4.90 5.10 4.30 4.50 --1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.50 0.60 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0 8 INCHES MIN MAX 0.193 0.200 0.169 0.177 --- 0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.020 0.024 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0 8 Freescale Semiconductor, Inc. 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. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typical" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or un authorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the parts. Motorola and an Equal Employment Opportunity/Affirmative Action Employer. are registered trademarks of Motorola, Inc. Motorola, Inc. is How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447 Technical Information Center: 1-800-521-6274 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu, Minato-ku, Tokyo 106-8573 Japan. 81-3-344-3569 ASIA / PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852-26668334 HOME PAGE: http://www.motorola.com/semiconductors MC33492/D For More Information On This Product, Go to: www.freescale.com Non Disclosure Agreement Required Freescale Semiconductor, Inc... |
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