TH72031KDC Melexis Inc, TH72031KDC Datasheet

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TH72031KDC

Manufacturer Part Number
TH72031KDC
Description
868/915 MHZ, FSK TRANSMITTER
Manufacturer
Melexis Inc
Datasheets

Specifications of TH72031KDC

Frequency
868MHz, 915MHz
Applications
Alarm and Security Systems, RKE
Modulation Or Protocol
FSK
Data Rate - Maximum
40 kbps
Power - Output
-11dBm ~ 9dBm
Current - Transmitting
5.1mA ~ 13.4mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
1.9 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
Memory Size
-
Other names
Q3477881B

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TH72031KDC
Manufacturer:
MELEXIS
Quantity:
70
Features
Ordering Information
Application Examples
General Description
The TH72031 FSK transmitter IC is designed for applications in the European 868 MHz industrial-scientific-
medical (ISM) band, according to the EN 300 220 telecommunications standard. It can also be used for any
other system with carrier frequencies ranging from 850 MHz to 930 MHz (e.g. for applications in the US 902
to 928 MHz ISM band).
The transmitter's carrier frequency f
grated PLL synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved.
This is done by using a crystal with a reference frequency according to: f
feedback divider ratio.
3901072031
Rev. 010
Part Number
TH72031
Fully integrated PLL-stabilized VCO
Frequency range from 850 MHz to 930 MHz
Single-ended RF output
FSK through crystal pulling allows modulation
from DC to 40 kbit/s
High FSK deviation possible for wideband data
transmission
Wide power supply range from 1.95 V to 5.5 V
Very low standby current
On-chip low voltage detector
General digital data transmission
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Wireless access control
Alarm and security systems
Garage door openers
Remote Controls
Home and building automation
Low-power telemetry systems
Temperature Code
K (-40°C to 125°C)
C (-10°C to 70°C)
c
is determined by the frequency of the reference crystal f
Page 1 of 20
Package Code
DC (SOIC8)
High over-all frequency accuracy
FSK deviation and center frequency independ-
ently adjustable
Adjustable output power range from
-12 dBm to +9.5 dBm
Adjustable current consumption from
5.1 mA to 13.4 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
FSKDTA
FSKSW
ENTX
ref
ROI
= f
Pin Description
c
1
2
3
4
/N, where N = 32 is the PLL
FSK Transmitter
TH72031
TH72031
Delivery Form
98 pc/tube
2500 pc/T&R
868/915MHz
ref
8
7
6
5
Data Sheet
. The inte-
VEE
OUT
VCC
PSEL
Jan/09

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TH72031KDC Summary of contents

Page 1

Features Fully integrated PLL-stabilized VCO Frequency range from 850 MHz to 930 MHz Single-ended RF output FSK through crystal pulling allows modulation from kbit/s High FSK deviation possible for wideband data transmission Wide power supply range from ...

Page 2

Document Content 1 Theory of Operation ...................................................................................................3 1.1 General ............................................................................................................................. 3 1.2 Block Diagram .................................................................................................................. 3 2 Functional Description ..............................................................................................4 2.1 Crystal Oscillator .............................................................................................................. 4 2.2 FSK Modulation ................................................................................................................ 4 2.3 Crystal Pulling................................................................................................................... 4 2.4 Output Power Selection .................................................................................................... 5 ...

Page 3

Theory of Operation 1.1 General As depicted in Fig.1, the TH72031 transmitter consists of a fully integrated voltage-controlled oscillator (VCO), a divide-by-32 divider (div32), a phase-frequency detector (PFD) and a charge pump (CP). An inter- nal loop filter determines ...

Page 4

Functional Description 2.1 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. ...

Page 5

Output Power Selection The transmitter is provided with an output power selection feature. There are four predefined output power steps and one off-step accessible via the power selection pin PSEL. A digital power step adjustment was chosen because of ...

Page 6

Mode Control Logic The mode control logic allows two different modes of operation as listed in the following table. The mode control pin ENTX is pulled- down internally. This guarantees that the whole circuit is shut down if this ...

Page 7

Pin Definition and Description Pin No. Name I/O Type 1 FSKDTA input 2 FSKSW analog I/O 3 ROI analog I/O 4 ENTX input 5 PSEL analog I/O 6 VCC supply 7 OUT output 8 VEE ground 3901072031 Rev. 010 ...

Page 8

Electrical Characteristics 4.1 Absolute Maximum Ratings Parameter Supply voltage Input voltage Storage temperature Junction temperature Thermal Resistance Power dissipation Electrostatic discharge 4.2 Normal Operating Conditions Parameter Supply voltage Operating temperature Input low voltage CMOS Input high voltage CMOS XOSC ...

Page 9

DC Characteristics all parameters under normal operating conditions, unless otherwise stated; typical values °C and V A Parameter Operating Currents Standby current Supply current in power step 0 Supply current in power step 1 Supply ...

Page 10

AC Characteristics all parameters under normal operating conditions, unless otherwise stated; typical values °C and V A Parameter CW Spectrum Characteristics Output power in step 0 (Isolation in off-state) Output power in step 1 Output ...

Page 11

Typical Operating Characteristics 5.1 DC Characteristics I SBY 5µA 4µA 3µA 2µA 1µA 200nA 150nA 100nA 50nA 0 2.0 2.5 4.9 4.5 4.1 3.7 3.3 2.9 2.2 2.6 1.8 3901072031 Rev. 010 Standby current 3.0 3.5 4.0 Vcc [V] ...

Page 12

Rev. 010 power step 1 3.4 3.0 3.8 4.2 Vcc [V] Fig. 8: Supply current in power step ...

Page 13

Rev. 010 power step 3 3.4 3.0 3.8 4.2 Vcc [V] Fig. 10: Supply current in power step 3 power ...

Page 14

AC Characteristics • Data according to test circuit in Fig. 18 (868.3MHz) -10.5 -11.0 -11.5 -12.0 -12.5 -13.0 2.2 2.6 1.8 -2.0 -3.0 -4.0 -5.0 2.2 2.6 1.8 3901072031 Rev. 010 power step 1 3.4 3.8 4.2 3.0 Vcc ...

Page 15

Rev. 010 power step 3 3.0 3.4 3.8 4.2 Vcc Vcc [V] [V] Fig. 14: Output power in step 3 power step ...

Page 16

Fig.16: 3901072031 Rev. 010 RF output signal with PLL reference spurs Fig.17: Single sideband phase noise Page TH72031 868/915MHz FSK Transmitter Data Sheet Jan/09 ...

Page 17

Test Circuit Fig.18: 6.1 Test circuit component list to Fig. 18 Part Size Value @ 868.3 MHz CM1 0805 1.8 pF CM2 0805 5.6 pF CM3 0805 0805 0805 15 nH CX1 0805 ...

Page 18

Package Description The device TH72031 is RoHS compliant .10 (.004) all Dimension in mm, coplanarity < 0.1mm min 4.80 3.81 5.80 max 4.98 3.99 6.20 all Dimension in inch, coplanarity < 0.004” ...

Page 19

Reliability Information This Melexis device is classified and qualified regarding soldering technology, solderability and moisture sensitivity level, as defined in this specification, according to following test methods: Reflow Soldering SMD’s (Surface Mount Devices) • IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification ...

Page 20

Disclaimer 1) The information included in this documentation is subject to Melexis intellectual and other property rights. Reproduction of information is permissible only if the information will not be altered and is accompanied by all associated conditions, limitations and ...

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