MC33493 Motorola, MC33493 Datasheet - Page 10

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MC33493

Manufacturer Part Number
MC33493
Description
PLL tuned UHF Transmitter for Data Transfer Applications
Manufacturer
Motorola
Datasheet

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RF OUTPUT SPECTRUM
10
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, voltage range V
R
load R
figure 12 (14) for OOK (FSK) modulation. Typical values reflect average measurement at V
RF OUTPUT SPECTRUM
Following are spectrums of transmitter carrier, measured in conduction mode. Three different spans have been
used. The 5MHz span spectrum (figure ) shows phase noise response close to the RF carrier, and the noise
suppression within the PLL loop bandwidth. The 50MHz span spectrum (figure 6) shows both phase noise and
reference spurious. Finally figure 7 shows second and third harmonics of carrier. All these spectrums are
measured in OOK modulation, at DATA=1.
Figure 8 shows spectrum in case of FSK modulation, with 45kHz deviation, at 4kbit/s data rate.
3.10
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
ext
3
=12kΩ+/-5%, RF output frequency f
L
DATACLK Output High Voltage
=50Ω+/-1% (figure 9). Values refer to the circuit shown in the recommended application schematics:
DATACLK Output Low Voltage
ENABLE Pull Down Resistor
DATACLK Settling Time,
Input Hysteresis Voltage
DATACLK Falling Time
DATACLK Rising Time
Input High Voltage
Input Low Voltage
t
DATACLK_settling
Input Current
Parameter
Freescale Semiconductor, Inc.
For More Information On This Product,
MC33493 Technical Data
Go to: www.freescale.com
carrier
Pins BAND, MODE, ENABLE, DATA
C
45% < Duty Cycle f
load
Microcontroller Interfaces
Pins BAND, MODE, DATA = 1
Test Conditions, Comments
=433.92MHz, reference frequency f
80% of the voltage swing
= 2pF, measured from 20% to
cc
=[V
shutdown
C
load
= 2pF
;3.6V], temperature range T
DATACLK
< 55%
0.75 x
MOTOROLA
0.7 x
Min.
V
V
reference
0
0
CC
CC
-
-
-
-
-
-
Limits
CC
Typ.
180
250
150
800
=13.560MHz, output
-
-
-
-
-
-
=3V, T
A
=[-40°C;+125°C],
0.25 x
Max.
0.3 x
2000
V
V
V
V
120
100
500
400
A
CC
CC
CC
CC
-
=25°C.
Unit
mV
kΩ
nA
ns
ns
µs
V
V
V
V

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