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PDF MLX72013 Data sheet ( Hoja de datos )
| Número de pieza | MLX72013 | |
| Descripción | FSK/ASK Transmitter | |
| Fabricantes | Melexis | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MLX72013 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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1. Features
Drop-in replacement of TH72011 with reduced
phase noise
Frequency range from 425 MHz to 445 MHz
Fully integrated PLL-stabilized VCO
Single-ended RF output
FSK via crystal pulling
Wideband FSK deviation possible
ASK/OOK via power amplifier modulation
Wide power supply range from 1.95 V to 5.5 V
Very low standby current
Low voltage detector
MLX72013
433MHz
FSK/ASK Transmitter
High over-all frequency accuracy
FSK deviation and center frequency
independently adjustable
Data rates from DC to 40 kbps
Adjustable output power range from
-10 dBm to +12 dBm
Adjustable current consumption from
2.9 mA to 16.8 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
2. Ordering Code
Product Code Temperature Code
MLX72013
K
MLX72013
K
Package Code
DC
DC
Option Code
AAA-000
AAA-000
Packing Form Code
RE
TU
Legend:
Temperature Code:
Package Code:
Packing Form:
K for Temperature Range -40°C to 125°C
DC for SOIC150Mil
RE for Reel, TU for Tube
Ordering example: MLX72013KDC-AAA-000-RE
3. Application Examples
RF remote controls
Automatic meter reading (AMR)
Tire pressure monitoring systems (TPMS)
Remote keyless entry (RKE)
Alarm and security systems
Garage door openers
Home automation
4. Pin Description
FSK DTA 1
FSK SW 2
ROI 3
ENTX 4
MLX72013
8 VEE
7 OUT
6 VCC
5 PSEL
3901072013
Rev. 007
Page 1 of 21
Data Sheet
Oct/14
1 page  
MLX72013
433MHz
FSK/ASK Transmitter
7. Functional Description
7.1 Crystal Oscillator
A Colpitts crystal oscillator with integrated functional capacitors is used as the reference oscillator for the PLL
synthesizer. The equivalent input capacitance CRO offered by the crystal oscillator input pin ROI is about
18pF. The crystal oscillator is provided with an amplitude control loop in order to have a very stable
frequency over the specified supply voltage and temperature range in combination with a short start-up time.
7.2 FSK Modulation
FSK modulation can be achieved by pulling the
crystal oscillator frequency. A CMOS-
compatible data stream applied at the pin
FSKDTA digitally modulates the XOSC via an
integrated NMOS switch. Two external pulling
capacitors CX1 and CX2 allow the FSK
deviation ∆f and the center frequency fc to be
adjusted independently. At FSKDTA = 0, CX2 is
connected in parallel to CX1 leading to the low-
frequency component of the FSK spectrum
(fmin); while at FSKDTA = 1, CX2 is deactivated
and the XOSC is set to its high frequency fmax.
An external reference signal can be directly AC-
coupled to the reference oscillator input pin
ROI. Then the transmitter is used without a
crystal. Now the reference signal sets the
carrier frequency and may also contain the FSK
(or FM) modulation.
Fig. 2: Crystal pulling circuitry
VCC
ROI
XTAL
FSKSW
CX2
CX1
VEE
FSKDTA
0
1
Description
fmin= fc - ∆f (FSK switch is closed)
fmax= fc + ∆f (FSK switch is open)
7.3 Crystal Pulling
A crystal is tuned by the manufacturer to the
required oscillation frequency f0 at a given load
capacitance CL and within the specified
calibration tolerance. The only way to pull the
oscillation frequency is to vary the effective load
capacitance CLeff seen by the crystal.
Figure 3 shows the oscillation frequency of a
crystal as a function of the effective load
capacitance. This capacitance changes in
accordance with the logic level of FSKDTA
around the specified load capacitance. The
figure illustrates the relationship between the
external pulling capacitors and the frequency
deviation.
It can also be seen that the pulling sensitivity
increases with the reduction of CL. Therefore,
applications with a high frequency deviation
require a low load capacitance. For narrow
band FSK applications, a higher load
capacitance could be chosen in order to reduce
the frequency drift caused by the tolerances of
the chip and the external pulling capacitors.
f
f max
fc
f min
XTAL
L1
C1
R1
CX1 CRO CL
CX1+CRO
(CX1+CX2) CRO
CX1+CX2+CRO
Fig. 3: Crystal pulling characteristic
C0
CL eff
CL eff
3901072013
Rev. 007
Page 5 of 21
Data Sheet
Oct/14
5 Page 
MLX72013
433MHz
FSK/ASK Transmitter
8.5 AC Characteristics
All parameters under normal operating conditions, unless otherwise stated;
typical values at TA = 23 °C and VCC = 3.3 V; test circuit shown in Fig. 12, fc = 433.92 MHz
Parameter
Symbol
Condition
Min Typ Max
CW Spectrum Characteristics
Output power in step 0
(Isolation in off-state)
Output power in step 1
Output power in step 2
Output power in step 3
Output power in step 4
Phase noise at 5kHz offset
Phase noise at 200kHz offset
Spurious emissions according
to EN 300 220-1 (2000.09)
table 13
Start-up Parameters
Poff
P1
P2
P3
P4
L(fm)5
L(fm)200
Pspur
ENTX=1
ENTX=1
ENTX=1
ENTX=1
ENTX=1
@ 5kHz offset
@ 200kHz offset
47MHz< f <74MHz
87.5MHz< f <118MHz
174MHz< f <230MHz
470MHz< f <862MHz
B=100kHz
f < 1GHz, B=100kHz
f > 1GHz, B=1MHz
-70
-10 -9
-8
2.5 3
4
678
10 11 12
-98
-97
-54
-36
-30
Start-up time
Frequency Stability
ton
from standby to
transmit mode
0.6 1.0
Frequency stability vs. supply
voltage
Frequency stability vs. temperature
Frequency stability vs. variation
range of CRO
dfVCC
dfTA
dfCRO
crystal at constant
temperature
±3
±10
±20
Unit
dBm
dBm
dBm
dBm
dBm
dBc/Hz
dBc/Hz
dBm
dBm
dBm
ms
ppm
ppm
ppm
8.6 Output Power Steps – FSK Mode
typical values at Ta = 23 °C
Power step
0
RPS / kΩ
<3
1
22
2
56
34
120 not connected
3901072013
Rev. 007
Page 11 of 21
Data Sheet
Oct/14
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MLX72013.PDF ] | |
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