TH72035KLD

Manufacturer Part NumberTH72035KLD
DescriptionTRANSMITTER, FSK/ASK, 433MHZ, 10QFN
ManufacturerMelexis Inc
TH72035KLD datasheet
 

Specifications of TH72035KLD

Transmitting Current17.3mAData Rate40Kbps
Frequency Range850MHz To 930MHzModulation TypeASK, FSK
Rf Ic Case StyleQFNNo. Of Pins10
Supply Voltage Range1.95V To 5.5VOperatingRoHS Compliant
Output Power9.5dBmRohs CompliantYes
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
Page 1/20

Download datasheet (599Kb)Embed
Next
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 DC to 40 kbit/s
High FSK deviation possible for wideband data
transmission
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
Ordering Information
Part Number
Temperature Code
TH72035
K (-40 °C to 125 °C)
Application Examples
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
General Description
The TH72035 FSK/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 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.
39010 72035
Rev. 009
On-chip low voltage detector
High over-all frequency accuracy
FSK deviation and center frequency
independently adjustable
Adjustable output power range from
-11 dBm to +9.5 dBm
Adjustable current consumption from
5.1 mA to 13.4 mA
Conforms to EN 300 220 and similar standards
10-pin Quad Flat No-Lead Package (QFN)
Package Code
LD (10L QFN 3x3 Dual)
ASKDTA
FSKDTA
FSKSW
ROI
ENTX
is determined by the frequency of the reference crystal f
c
Page 1 of 20
TH72035
868/915MHz
FSK/ASK Transmitter
Delivery Form
121 pc/tube
5000 pc/T&R
Pin Description
bottom
top
1
VCC
10
VEE
9
2
TH72035
3
OUT
8
VEE
7
4
6
5
PSEL
. The inte-
ref
= f
/N, where N = 32 is the PLL
ref
c
Data Sheet
March/08

TH72035KLD 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 ASK achieved by on/off keying ...

  • Page 2

    Document Content 1 Theory of Operation ...................................................................................................3 1.1 General ............................................................................................................................. 3 1.2 Block Diagram .................................................................................................................. 3 2 Functional Description ..............................................................................................3 2.1 Crystal Oscillator .............................................................................................................. 3 2.2 FSK Modulation ................................................................................................................ 4 2.3 Crystal Pulling................................................................................................................... 4 2.4 ASK Modulation ................................................................................................................ 5 2.5 ...

  • Page 3

    Theory of Operation 1.1 General As depicted in Fig.1, the TH72035 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

    FSK Modulation FSK modulation can be achieved by pulling the crystal oscillator frequency. 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 ...

  • Page 5

    ASK Modulation The PLL transmitter can be ASK-modulated by applying a data stream directly at the pin ASKDTA. This turns the internal current sources of the power amplifier on and off and therefore leads to an ASK signal at ...

  • 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 ASKDTA input 2 FSKDTA input 3 FSKSW analog I/O 4 ROI analog I/O 5 ENTX input 6 PSEL analog I/O 7 VEE ground 8 OUT output 9 VEE ground ...

  • 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 39010 72035 Rev. 009 Standby current 3.0 3.5 4.0 Vcc ...

  • Page 12

    Rev. 009 power step 1 3.4 3.0 3.8 4.2 Vcc [V] Fig. 8: Supply current in power ...

  • Page 13

    Rev. 009 power step 3 3.4 3.0 3.8 4.2 Vcc [V] Fig. 10: Supply current in power step 3 ...

  • 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 39010 72035 Rev. 009 power step 1 3.4 3.8 4.2 3.0 ...

  • Page 15

    Rev. 009 power step 3 3.0 3.4 3.8 4.2 Vcc Vcc [V] [V] Fig. 14: Output power in step 3 power ...

  • Page 16

    Fig.16: 39010 72035 Rev. 009 RF output signal with PLL reference spurs Fig.17: Single sideband phase noise Page TH72035 868/915MHz FSK/ASK Transmitter Data Sheet March/08 ...

  • Page 17

    Test Circuit Fig. 18: Test circuit for FSK and ASK with 50 Ω matching network 6.1 Test circuit component list to Fig. 18 Value @ Part Size 868.3 MHz CM1 0805 1.8 pF CM2 0805 5.6 pF CM3 0805 ...

  • Page 18

    Package Description The device TH72035 is RoHS compliant all Dimensions min 2.85 2.85 max 3.15 3.15 all Dimensions in inch min 0.112 0.112 0.0878 0.051 0.0315 max 0.124 0.124 0.0976 0.055 ...

  • 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 ...