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 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
TH72035
868/915MHz
FSK/ASK Transmitter
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)
Ordering Information
Part Number Temperature Code Package Code Delivery Form
TH72035 K (-40 °C to 125 °C) LD (10L QFN 3x3 Dual)
121 pc/tube
5000 pc/T&R
Application Examples Pin Description
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
ASKDTA
FSKDTA
FSKSW
ROI
ENTX
top
TH72035
VCC
VEE
OUT
VEE
PSEL
bottom
10
9
8
7
6
1
2
3
4
5
General Description
The TH72035 FSK/ASK transmitter IC is designed for applications in the European 868 MHz industrialscientific-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
is determined by the frequency of the reference crystal f
c
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
= fc/N, where N = 32 is the PLL
ref
feedback divider ratio.
39010 72035 Page 1 of 20 Data Sheet
Rev. 009 March/08
. The inte-
ref
Page 2
TH72035
868/915MHz
FSK/ASK Transmitter
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 Output Power Selection.................................................................................................... 5
2.6 Lock Detection.................................................................................................................. 5
2.7 Low Voltage Detection...................................................................................................... 5
2.8 Mode Control Logic .......................................................................................................... 6
2.9 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 Description................................................................................................18
7.1 Soldering Information ..................................................................................................... 18
7.2 Recommended PCB Footprints...................................................................................... 18
8 Reliability Information..............................................................................................19
9 ESD Precautions ............................................................Error! Bookmark not defined.
10 Disclaimer.................................................................................................................20
39010 72035 Page 2 of 20 Data Sheet
Rev. 009 March/08
Page 3
TH72035
868/915MHz
FSK/ASK Transmitter
1 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 internal loop filter determines the dynamic behavior of the PLL and suppresses reference spurious signals. A
Colpitts crystal oscillator (XOSC) is used as the reference oscillator of a phase-locked loop (PLL) synthesizer. The VCO’s output signal feeds the power amplifier (PA). The RF signal power P
four steps from P
voltage V
at pin PSEL. The open-collector output (OUT) can be used either to directly drive a loop antenna
PS
= –11 dBm to +9.5 dBm, either by changing the value of resistor RPS or by varying the
out
or to be matched to a 50Ohm load. Bandgap biasing ensures stable operation of the IC at a power supply
range of 1.95 V to 5.5 V.
1.2 Block Diagram
can be adjusted in
out
RPS
XTAL
CX1
ENTX
FSKSW
CX2
ROI
5
4
3
mode
control
XOSC
FSKDTA
XBUF
7
VEE
PLL
32
PFD
CP
VCC
VCO
PSEL
10
ASKDTA
6
PA
low
voltage
detector
92
VEE
1
8
OUT
antenna
matching
network
Fig. 1: Block diagram with external components
2 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. 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.
39010 72035 Page 3 of 20 Data Sheet
Rev. 009 March/08
Page 4
O
O
2.2 FSK Modulation
FSK modulation can be achieved by pulling the
crystal oscillator frequency. A CMOScompatible 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 Δf and the center frequency f
justed independently. At FSKDTA = 0, CX2 is
connected in parallel to CX1 leading to the lowfrequency component of the FSK spectrum
); while at FSKDTA = 1, CX2 is deactivated
(f
min
and the XOSC is set to its high frequency f
An external reference signal can be directly ACcoupled 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.
to be ad-
c
max
.
TH72035
FSK/ASK Transmitter
Fig. 2: Crystal pulling circuitry
FSKDTA Description
0
1
XTAL
CX2
CX1
= fc - Δf (FSK switch is closed)
f
min
= fc + Δf (FSK switch is open)
f
max
868/915MHz
VCC
ROI
FSKSW
VEE
2.3 Crystal Pulling
A crystal is tuned by the manufacturer to the
required oscillation frequency f
at a given load
0
capacitance CL and within the specified calibration tolerance. The only way to pull the oscillation frequency is to vary the effective load capacitance CL
seen by the crystal.
eff
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.
For ASK applications CX2 can be omitted. Then CX1 has to be adjusted for center frequency.
f
f
max
f
c
XTAL
L1
C1
R1
f
min
CX1+CR
CLCX1 CRO
(CX1+CX2) CRO
CX1+CX2+CR
Fig. 3: Crystal pulling characteristic
C0
CL
CL
eff
eff
39010 72035 Page 4 of 20 Data Sheet
Rev. 009 March/08
Page 5
TH72035
868/915MHz
FSK/ASK Transmitter
2.4 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 the output.
2.5 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 its high accuracy and stability. The number of steps and the step sizes as well as the
corresponding power levels are selected to cover a wide spectrum of different applications.
The implementation of the output power control
logic is shown in figure 4. There are two
matched current sources with an amount of
about 8 µA. One current source is directly applied to the PSEL pin. The other current source
is used for the generation of reference voltages
with a resistor ladder. These reference voltages
are defining the thresholds between the power
steps. The four comparators deliver thermometer-coded control signals depending on the
voltage level at the pin PSEL. In order to have a
certain amount of ripple tolerance in a noisy
environment the comparators are provided with
a little hysteresis of about 20 mV. With these
control signals, weighted current sources of the
power amplifier are switched on or off to set the
desired output power level (Digitally Controlled
Current Source). The LOCK, ASK signal and
the output of the low voltage detector are gating
this current source.
There are two ways to select the desired output power step. First by applying a DC voltage at the pin PSEL,
then this voltage directly selects the desired output power step. This kind of power selection can be used if
the transmission power must be changed during operation. For a fixed-power application a resistor can be
used which is connected from the PSEL pin to ground. The voltage drop across this resistor selects the desired output power level. For fixed-power applications at the highest power step this resistor can be omitted.
The pin PSEL is in a high impedance state during the “TX standby” mode.
ASKDTA Description
0 Power amplifier is turned off
1
RPS
PSEL
ASKDTA
Fig. 4: Block diagram of output power control circuitry
Power amplifier is turned on (according
to the selected output power step)
&
&
&
&
&
OUT
2.6 Lock Detection
The lock detection circuitry turns on the power amplifier only after PLL lock. This prevents from unwanted
emission of the transmitter if the PLL is unlocked.
2.7 Low Voltage Detection
The supply voltage is sensed by a low voltage detect circuitry. The power amplifier is turned off if the supply
voltage drops below a value of about 1.85 V. This is done in order to prevent unwanted emission of the
transmitter if the supply voltage is too low.
39010 72035 Page 5 of 20 Data Sheet
Rev. 009 March/08
Page 6
TH72035
A
868/915MHz
FSK/ASK Transmitter
2.8 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 pulleddown internally. This guarantees that the whole
circuit is shut down if this pin is left floating.
2.9 Timing Diagrams
After enabling the transmitter by the ENTX signal, the power amplifier remains inactive for the time ton, the
transmitter start-up time. The crystal oscillator starts oscillation and the PLL locks to the desired output frequency within the time duration t
and then the RF carrier can be FSK or ASK modulated.
. After successful PLL lock, the LOCK signal turns on the power amplifier,
on
ENTX Mode Description
0 TX standby TX disabled
1 TX active TX enable
high
ENTX
low
high
LOCK
low
high
FSKDTA
low
RF carr ie r
high
ENTX
low
high
LOCK
low
high
SKDTA
low
t
t
on
t
on
Fig. 5: Timing diagrams for FSK and ASK modulation
t
39010 72035 Page 6 of 20 Data Sheet
Rev. 009 March/08
Page 7
TH72035
868/915MHz
FSK/ASK Transmitter
3 Pin Definition and Description
Pin No. Name I/O Type Functional Schematic Description
1 ASKDTA input
2 FSKDTA input
3 FSKSW analog I/O
ASKDTA
1
FSKDTA
2
1.5k
FSKSW
3
1.5k
0: ENTX=1
1: ENTX=0
Ω
0: ENTX=1
1: ENTX=0
Ω
ASK data input,
CMOS compatible with operation mode dependent
pull-up circuit
TX standby: no pull-up
TX active: pull up
FSK data input,
CMOS compatible with operation mode dependent
pull-up circuit
TX standby: no pull-up
TX active: pull up
XOSC FSK pulling pin,
MOS switch
4 ROI analog I/O
5 ENTX input
6 PSEL analog I/O
7 VEE ground
8 OUT output
ENTX
5
ROI
PSEL
6
OUT
XOSC connection to XTAL,
25k
Colpitts type crystal oscillator
4
36p
36p
mode control input,
CMOS-compatible with in-
1.5k
Ω
ternal pull-down circuit
power select input, high
impedance comparator logic
TX standby: I
TX active: I
PSEL
PSEL
= 0
= 8µA
1.5k
8µA
Ω
negative power supply
VCC
8
power amplifier output,
open collector
VEEVEE
negative power supply
positive power supply
9 VEE ground
10 VCC supply
39010 72035 Page 7 of 20 Data Sheet
Rev. 009 March/08
Page 8
TH72035
868/915MHz
FSK/ASK Transmitter
4 Electrical Characteristics
4.1 Absolute Maximum Ratings
Parameter Symbol Condition Min Max Unit
V
Supply voltage
CC
Input voltage VIN -0.3 VCC+0.3 V
Storage temperature T
-65 150 °C
STG
Junction temperature TJ 150 °C
Thermal Resistance R
Power dissipation P
Electrostatic discharge V
49 K/W
thJA
0.12 W
diss
human body model (HBM)
ESD
according to CDF-AECQ100-002
0 7.0 V
±2.0
kV
4.2 Normal Operating Conditions
Parameter Symbol Condition Min Max Unit
Supply voltage VCC 1.95 5.5 V
Operating temperature TA -40 125 °C
Input low voltage CMOS V
Input high voltage CMOS V
XOSC frequency f
VCO frequency fc
FSK deviation
Δf
ENTX, DTA pins 0.3*V
IL
ENTX, DTA pins 0.7*V
IH
set by the crystal 26.6 29 MHz
ref
= 32 • f
f
c
ref
depending on CX1, CX2
CC
850 930 MHz
±2.5 ±60
CC
V
V
kHz
and crystal parameters
FSK Data rate R NRZ 40 kbit/s
ASK Data rate R NRZ 40 kbit/s
4.3 Crystal Parameters
Parameter Symbol Condition Min Max Unit
Crystal frequency f0 fundamental mode, AT 26.6 29 MHz
Load capacitance CL 10 15 pF
Static capacitance C0 7 pF
Series resistance R1
Spurious response a
only required for FSK -10 dB
spur
50
Ω
39010 72035 Page 8 of 20 Data Sheet
Rev. 009 March/08
Page 9
4.4 DC Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at T
Parameter Symbol Condition Min Typ Max Unit
Operating Currents
= 23 °C and VCC = 3 V
A
TH72035
868/915MHz
FSK/ASK Transmitter
Standby current I
Supply current in power step 0 I
Supply current in power step 1 I
Supply current in power step 2 I
Supply current in power step 3 I
Supply current in power step 4 I
SBY
CC0
CC1
CC2
CC3
CC4
ENTX=0, TA=85°C 0.2 200 nA
ENTX=0, T
=125°C 4 µA
A
ENTX=1 2.5 3.9 5.7 mA
ENTX=1 3.5 5.1 7.3 mA
ENTX=1 4.5 6.4 8.8 mA
ENTX=1 6.2 8.6 11.4 mA
ENTX=1 9.4 13.4 17.3 mA
Digital Pin Characteristics
Input low voltage CMOS VIL ENTX, DTA pins -0.3 0.3*Vcc V
Input high voltage CMOS VIH ENTX, DTA pins 0.7*VCC VCC+0.3 V
Pull down current
ENTX=1 0.2 2.0 20 µA
I
PDEN
ENTX pin
Low level input current
ENTX=0 0.02 µA
I
INLEN
ENTX pin
High level input current
DTA pins
Pull up current
DTA pins active
Pull up current
DTA pins standby
I
INHDTA
I
PUDTAa
I
PUDTAs
FSKDTA=1
ASKDTA=1
FSKDTA=0,
ASKDTA=0, ENTX=1
FSKDTA=0,
ASKDTA=0, ENTX=0
0.02 µA
0.1 1.5 12 µA
0.02 µA
FSK Switch Resistance
MOS switch On resistance RON
FSKDTA=0
20 70
Ω
ENTX=1
MOS switch Off resistance R
OFF
FSKDTA=1
1
MΩ
ENTX=1
Power Select Characteristics
Power select current I
Power select voltage step 0 V
Power select voltage step 1 V
Power select voltage step 2 V
Power select voltage step 3 V
Power select voltage step 4 V
ENTX=1 7.0 8.6 9.9 µA
PSEL
ENTX=1 0.035 V
PS0
ENTX=1 0.14 0.24 V
PS1
ENTX=1 0.37 0.60 V
PS2
ENTX=1 0.78 1.29 V
PS3
ENTX=1 1.55 V
PS4
Low Voltage Detection Characteristic
Low voltage detect threshold V
ENTX=1 1.75 1.85 1.95 V
LVD
39010 72035 Page 9 of 20 Data Sheet
Rev. 009 March/08
Page 10
4.5 AC Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at T
Parameter Symbol Condition Min Typ Max Unit
CW Spectrum Characteristics
= 23 °C and VCC = 3 V; test circuit shown in Fig. 18, fc = 868.3MHz
A
TH72035
868/915MHz
FSK/ASK Transmitter
Output power in step 0
ENTX=1 -70 dBm
P
off
(Isolation in off-state)
Output power in step 1 P
Output power in step 2 P
Output power in step 3 P
Output power in step 4 P
ENTX=1 -13 -12 -11
1
ENTX=1 -4 -3 -2
2
ENTX=1 1 2.5 3.5
3
ENTX=1 4 7.5 9.5
4
1)
dBm
1)
dBm
1)
dBm
1)
dBm
Phase noise L(fm) @ 200kHz offset -87 -82 dBc/Hz
Spurious emissions according
to EN 300 220-1 (2000.09)
table 13
P
47MHz< f <74MHz
spur
87.5MHz< f <118MHz
174MHz< f <230MHz
-54 dBm
470MHz< f <862MHz
B=100kHz
f < 1GHz, B=100kHz -36 dBm
f > 1GHz, B=1MHz -30 dBm
Start-up Parameters
Start-up time ton
from standby to
0.6 1 ms
transmit mode
Frequency Stability
Frequency stability vs. supply
df
VCC
±3
ppm
voltage
Frequency stability vs. tem-
perature
Frequency stability vs. varia-
tion range of C
RO
df
df
crystal at constant
TA
temperature
CRO
±10
±20
ppm
ppm
1) output matching network tuned for 5V supply
4.6 Output Power Steps
Power step 0 1 2 3 4
RPS / kΩ
39010 72035 Page 10 of 20 Data Sheet
Rev. 009 March/08
< 3 22 56 120 not connected
Page 11
5 Typical Operating Characteristics
5.1 DC Characteristics
I
SBY
5µA
4µA
3µA
2µA
1µA
200nA
150nA
100nA
50nA
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Fig. 6: Standby current limits
Standby current
Vcc [V]
power step 0
4.9
4.5
4.1
3.7
Icc [mA]
3.3
2.9
1.8
2.2
2.6
3.0
Fig. 7: Supply current in power step 0
3.4
3.8 4.2
Vcc [V]
TH72035
868/915MHz
FSK/ASK Transmitter
125°C
85°C
25°C
125°C
105°C
85°C
25°C
0°C
-20°C
-40°C
4.6
5.0
5.4
5.8
39010 72035 Page 11 of 20 Data Sheet
Rev. 009 March/08
Page 12
TH72035
868/915MHz
FSK/ASK Transmitter
6.8
6.4
6.0
5.6
5.2
Icc [mA]
4.8
4.4
4.0
1.8
8.0
7.5
7.0
6.5
Icc [mA]
6.0
5.5
5.0
1.8
2.2
2.2
2.6
2.6
3.0
Fig. 8: Supply current in power step 1
3.0
Fig. 9: Supply current in power step 2
power step 1
3.4
power step 2
3.4
3.8 4.2
Vcc [V]
3.8 4.2
Vcc [V]
4.6
4.6
5.0
5.0
5.4
5.4
125°C
105°C
85°C
25°C
0°C
-20°C
-40°C
5.8
125°C
105°C
85°C
25°C
0°C
-20°C
-40°C
5.8
39010 72035 Page 12 of 20 Data Sheet
Rev. 009 March/08
Page 13
TH72035
868/915MHz
FSK/ASK Transmitter
10.5
10.0
Icc [mA]
Icc [mA]
9.5
9.0
8.5
8.0
7.5
7.0
16
15
14
13
12
11
1.8
2.2
2.2 2.6
2.6
3.0
Fig. 10: Supply current in power step 3
3.0
Fig. 11: Supply current in power step 4
power step 3
3.4
power step 4
3.4
3.8 4.2
Vcc [V]
3.8 4.2
Vcc [V]
4.6
4.6
5.0
5.0
5.4
5.4
125°C
105°C
85°C
25°C
0°C
-20°C
-40°C
5.8
125°C
105°C
85°C
25°C
0°C
-20°C
-40°C
5.8
39010 72035 Page 13 of 20 Data Sheet
Rev. 009 March/08
Page 14
5.2 AC Characteristics
• Data according to test circuit in Fig. 18 (868.3MHz)
power step 1
-10.5
-11.0
TH72035
868/915MHz
FSK/ASK Transmitter
5.4
25°C
85°C
125°C
-40°C
5.8
25°C
85°C
125°C
-40°C
-11.5
-12.0
Pout [dBm]
-12.5
-13.0
1.8
-2.0
-3.0
2.2 2.6
3.0
Fig. 12: Output power in step 1
3.4
power step 2
3.8 4.2
Vcc [V]
4.6
5.0
Pout [dBm]
-4.0
-5.0
1.8
39010 72035 Page 14 of 20 Data Sheet
Rev. 009 March/08
2.2 2.6
3.0
Fig. 13: Output power in step 2
3.4
3.8 4.2
Vcc [V]
4.6
5.0
5.4
5.8
Page 15
TH72035
868/915MHz
FSK/ASK Transmitter
power step 3
4.0
3.0
25°C
125°C
-40°C
5.4
25°C
85°C
85°C
5.8
2.0
Pout [dBm]
1.0
0
1.8
11.0
9.0
7.0
2.2 2.6
3.0
Fig. 14: Output power in step 3
3.4
power step 4
3.8 4.2
Vcc [V]
Vcc [V]
4.6
5.0
5.0
Pout [dBm]
3.0
1.0
1.8
39010 72035 Page 15 of 20 Data Sheet
Rev. 009 March/08
2.2 2.6
3.0
Fig. 15: Output power in step 4
3.4
3.8 4.2
Vcc [V]
4.6
5.0
125°C
-40°C
5.4
5.8
Page 16
TH72035
868/915MHz
FSK/ASK Transmitter
Fig.16: RF output signal with PLL reference spurs
Fig.17: Single sideband phase noise
39010 72035 Page 16 of 20 Data Sheet
Rev. 009 March/08
Page 17
6 Test Circuit
TH72035
868/915MHz
FSK/ASK Transmitter
OUT
21
GND
CM2
LM
CB1
CB0
VCC
CM3
12
2341
GND
ASK_DTA
CM1
7
4
VEE
ROI
RPS
6
PSEL
ENTX
5
XTAL
LT
8910
VEE
VCC
ASKDTA
FSKDTA
CX2
3
CX1
OUT
FSKSW
231
GND
FSK_DTA
GND
VCC
ENTX
Fig. 18: Test circuit for FSK and ASK with 50 Ω matching network
6.1 Test circuit component list to Fig. 18
Part Size
Value @
868.3 MHz
CM1 0805 1.8 pF 2.2 pF
CM2 0805 5.6 pF 5.6 pF
CM3 0805 68 pF 68 pF
LM 0805 12 nH 10 nH
LT 0805 15 nH 10 nH
CX1
CX1
0805 18 pF 18 pF
_FSK
0805 27 pF 27 pF
_ASK
CX2 0805 10 pF 10 pF
RPS 0805 see section 4.6
CB0 0805 220 nF
CB1 0805 330 pF
XTAL HC49/S 27.13 438 MHz 28.59375 MHz
Note 1: value depending on crystal parameters
Note 2: for high-power applications high-Q wire-wound inductors should be used
Value @
915 MHz
Tolerance Description
±5%
±5%
±5%
±5%
±5%
±5% XOSC FSK capacitor (Δf = ±20 kHz), note 1
±5%
±5% XOSC capacitor (Δf = ±20 kHz), note 1
±5%
±20%
±10%
±30ppm calibr.
±30ppm temp.
impedance matching capacitor
impedance matching capacitor
impedance matching capacitor
impedance matching inductor, note 2
output tank inductor, note 2
XOSC ASK capacitor, trimmed to fC, note 1
only needed for FSK
power-select resistor
de-coupling capacitor
de-coupling capacitor
fundamental wave crystal,
= 12 pF, C
C
L
0, max
= 7 pF, R1 = 40 Ω
39010 72035 Page 17 of 20 Data Sheet
Rev. 009 March/08
Page 18
7 Package Description
The device TH72035 is RoHS compliant.
TH72035
868/915MHz
FSK/ASK Transmitter
D
610
E
1
A
A1
5
A3
E2
b
The “exposed pad” is not connected
it should not be connected to the PCB.
D2
exposed pad
e
to internal ground,
L
0.23
0.36
0.225x45°
Fig. 7: 10L QFN 3x3 Dual
all Dimensions in mm
D E D2 E2 A A1 A3 L e b
min 2.85 2.85 2.23 1.49 0.80 0 0.3 0.18
max 3.15 3.15 2.48 1.74 1.00
0.05 0.5 0.30
0.20 0.50
all Dimensions in inch
min 0.112 0.112 0.0878 0.051 0.0315 0 0.0118 0.0071
max 0.124 0.124 0.0976 0.055 0.0393
0.002 0.0197 0.0118
0.0079 0.0197
7.1 Soldering Information
• The device TH72035 is qualified for MSL1 with soldering peak temperature 260 deg C
according to JEDEC J-STD-20.
7.2 Recommended PCB Footprints
X
Y
10
Z
G
15
D2
th
39010 72035 Page 18 of 20 Data Sheet
Rev. 009 March/08
e
C
PL
6
E2
th
solder st opsolder pad
all Dimensions in mm
Z
min 3.55 1.9 3.2 1.3 0.25 0.7 0.3
max 3.90 2.3 3.6 1.7 0.30 1.0
G
D2
E2
th
X Y C
th
PL
0.5
all Dimensions in inch
min 0.1398 0.0748 0.1260 0.0512 0.0098 0.0276 0.0591
max 0.1535 0.0906 0.1417 0.0669 0.0118 0.0394
0.0197
Fig. 8: PCB land pattern style
e
0.5
0.0197
Page 19
TH72035
868/915MHz
FSK/ASK Transmitter
8 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 (S
• IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices (classification reflow profiles according to table 5-2)”
Wave Soldering SMD’s (S
• EN60749-20
“Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat”
Solderability SMD’s (S
• EIA/JEDEC JESD22-B102
“Solderability”
For all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature profile etc) additional classification and qualification tests have to be
agreed upon with Melexis.
The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance of
adhesive strength between device and board.
urface Mount Devices)
urface Mount Devices)
urface Mount Devices)
9 ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
39010 72035 Page 19 of 20 Data Sheet
Rev. 009 March/08
Page 20
TH72035
868/915MHz
FSK/ASK Transmitter
10 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 notices.
2) Any use of the documentation without the prior written consent of Melexis other than the one set forth in
clause 1 is an unfair and deceptive business practice. Melexis is not responsible or liable for such altered
documentation.
3) The information furnished by Melexis in this documentation is provided ’as is’. Except as expressly warranted in any other applicable license agreement, Melexis disclaims all warranties either express, implied, statutory or otherwise including but not limited to the merchantability, fitness for a particular purpose, title and non-infringement with regard to the content of this documentation.
4) Notwithstanding the fact that Melexis endeavors to take care of the concept and content of this documentation, it may include technical or factual inaccuracies or typographical errors. Melexis disclaims any
responsibility in connection herewith.
5) Melexis reserves the right to change the documentation, the specifications and prices at any time and
without notice. Therefore, prior to designing this product into a system, it is necessary to check with
Melexis for current information.
6) Melexis shall not be liable to recipient or any third party for any damages, including but not limited to
personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the information in this documentation.
7) The product described in this documentation is intended for use in normal commercial applications. Applications requiring operation beyond ranges specified in this documentation, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application.
8) Any supply of products by Melexis will be governed by the Melexis Terms of Sale, published on
www.melexis.com
© Melexis NV. All rights reserved.
Europe, Africa: Americas: Asia:
Phone: +32 1367 0495 Phone: +1 603 223 2362 Phone: +32 1367 0495
E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com E-mail: sales_asia@melexis.com
.
For the latest version of this document, go to our website at:
www.melexis.com
Or for additional information contact Melexis Direct:
ISO/TS 16949 and ISO14001 Certified
39010 72035 Page 20 of 20 Data Sheet
Rev. 009 March/08
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