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Melexis

TH72032 Datasheet Preview

TH72032 Datasheet

ASK Transmitter

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TH72032
868/915MHz
ASK Transmitter
Features
Fully integrated PLL-stabilized VCO
Frequency range from 850 MHz to 930 MHz
Single-ended RF output
ASK achieved by on/off keying of internal
power amplifier up to 40 kbit/s
Wide power supply range from 1.95 V to 5.5
V
Very low standby current
On-chip low voltage detector
High over-all frequency accuracy
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)
Application Examples
General digital data transmission
Tire Pressure Monitoring System (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry
Alarm and security systems
Garage door openers
Home automation
Pin Description
Ordering information
Product Code
TH72032
TH72032
Temperature Code
K
K
Package Code
DC
DC
Legend:
Temperature Code:
Package Code:
Packing Form:
Ordering example:
K for Temperature Range -40°C to 125°C
DC for SOIC
RE for Reel, TU for Tube
TH72032KDC-BAA-000-TU
Option Code
BAA-000
BAA-000
Packing Form Code
RE
TU
General Description
The TH72032 ASK 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 915 MHz ISM band).
The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The integrated PLL
synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved by using a crystal with a
reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback divider ratio.
REVISION 012 - JUNE 14, 2017
3901072032
Page 1 of 21




Melexis

TH72032 Datasheet Preview

TH72032 Datasheet

ASK Transmitter

No Preview Available !

TH72032
868/915MHz
ASK Transmitter
Contents
Features ..................................................................................................................................................... 1
Application Examples .................................................................................................................................1
Pin Description...........................................................................................................................................1
Ordering information .................................................................................................................................1
General Description ...................................................................................................................................1
1. Theory of Operation...............................................................................................................................4
1.1. General................................................................................................................................................ 4
1.2. Block Diagram..................................................................................................................................... 4
2. Functional Description ...........................................................................................................................5
2.1. Crystal Oscillator................................................................................................................................. 5
2.2. ASK Modulation .................................................................................................................................. 5
2.3. Crystal Pulling ..................................................................................................................................... 5
2.4. Output Power Selection..................................................................................................................... 6
2.5. Lock Detection.................................................................................................................................... 6
2.6. Low Voltage Detection....................................................................................................................... 6
2.7. Mode Control Logic............................................................................................................................ 7
2.8. Timing Diagrams................................................................................................................................. 7
3. Pin Definition and Description................................................................................................................8
4. Electrical Characteristics ........................................................................................................................9
4.1. Absolute Maximum Ratings ............................................................................................................... 9
4.2. Normal Operating Conditions............................................................................................................ 9
4.3. Crystal Parameters ............................................................................................................................. 9
4.4. DC Characteristics ............................................................................................................................ 10
4.5. AC Characteristics............................................................................................................................. 11
4.6. Output Power Steps ......................................................................................................................... 11
5. Typical Operating Characteristics .........................................................................................................12
5.1. DC Characteristics ............................................................................................................................ 12
5.2. AC Characteristics............................................................................................................................. 15
6. Test Circuit ...........................................................................................................................................18
6.1. Test circuit component list to Fig. 17 .............................................................................................. 18
7. Package Information ............................................................................................................................19
Page 2 of 21
REVISION 012 - JUNE 14, 2017
3901072032


Part Number TH72032
Description ASK Transmitter
Maker Melexis
Total Page 21 Pages
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