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Melexis
Melexis

TH72001 Datasheet Preview

TH72001 Datasheet

315MHz FSK Transmitter

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TH72001 pdf
Features
Fully integrated PLL-stabilized LC VCO
Frequency range of 290MHz to 350MHz
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 2.1 V to 5.5 V
Very low standby current
On-chip low voltage detector
TH72001
315MHz
FSK Transmitter
High over-all frequency accuracy
FSK deviation and center frequency
independently adjustable
Adjustable output power range from
-12 dBm to +11 dBm
Adjustable current consumption from
3.2 mA to 10.3 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
Ordering Code
Product Code Temperature Code
TH72001
K
TH72001
K
Package Code
DC
DC
Option Code
BAA-000
BAA-000
Packing Form Code
RE
TU
Legend:
Temperature Code:
Package Code:
Packing Form:
K for Temperature Range -40°C to 125°C
DC for SOIC
RE for Reel, TU for Tube
Ordering example:
TH72001KDC-BAA-000-RE
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
FSKDTA 1
FSKSW 2
ROI 3
ENTX 4
TH72001
8 VEE
7 OUT
6 VCC
5 PSEL
General Description
The TH72001 FSK transmitter IC is designed for applications in the 315 MHz industrial-scientific-medical
(ISM) band. It can also be used for any other system with carrier frequencies at
290 to 350MHz.
The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The
integrated PLL synthesizer ensures that the radio frequency (RF) 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.
3901072001
Rev. 010
Page 1 of 20
Data Sheet
Jun/12



Melexis
Melexis

TH72001 Datasheet Preview

TH72001 Datasheet

315MHz FSK Transmitter

No Preview Available !

TH72001 pdf
TH72001
315MHz
FSK Transmitter
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
2.5 Lock Detection ................................................................................................................... 5
2.6 Low Voltage Detection ....................................................................................................... 5
2.7 Mode Control Logic ............................................................................................................ 6
2.8 Timing Diagrams ................................................................................................................ 6
3 Pin Definition and Description ..................................................................................7
4 Electrical Characteristics ..........................................................................................8
4.1 Absolute Maximum Ratings................................................................................................ 8
4.2 Normal Operating Conditions ............................................................................................. 8
4.3 Crystal Parameters ............................................................................................................ 8
4.4 DC Characteristics ............................................................................................................. 9
4.5 AC Characteristics ........................................................................................................... 10
4.6 Output Power Steps ......................................................................................................... 10
5 Typical Operating Characteristics ..........................................................................11
5.1 DC Characteristics ........................................................................................................... 11
5.2 AC Characteristics ........................................................................................................... 14
6 Test Circuit ...............................................................................................................17
6.1 Test circuit component list to Fig. 18 ................................................................................ 17
7 Package Information ................................................................................................18
8 Reliability Information.................................................... Error! Bookmark not defined.
9 ESD Precautions ......................................................................................................19
10 Disclaimer .................................................................................................................20
3901072001
Rev. 010
Page 2 of 20
Data Sheet
Jun/12


Part Number TH72001
Description 315MHz FSK Transmitter
Maker Melexis
Total Page 20 Pages
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