TH71111 DataSheet DownloadLink 4795

TH71111
868/915MHz
FSK/ASK Receiver
Features
ˆ
ˆ
ˆ
ˆ
ˆ
ˆ
Single-conversion superhet architecture for low external component count
FSK demodulation with phase-coincidence demodulator
Low current consumption in active mode and very low standby current
Switchable LNA gain for improved dynamic range
RSSI allows signal strength indication and ASK detection
32-pin Low profile Quad Flat Package (LQFP)
Ordering Information
Part No.
Temperature Code
Package Code
Part Number
Temperature Code
Package Code
Delivery Form
TH71111
E (-40 °C to 85 °C)
NE (LQFP32)
250 pc/tray
2000 pc/T&R
‰
‰
‰
‰
‰
‰
‰
‰
ˆ
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
Pin Description
OUTP
VEE_BIAS
RSSI
OAP
OAN
OUT_OA
VCC_BIAS
Application Examples
24
VEE_RO
RO
VCC_PLL
ENRX
LF
VEE_LNA
IN_LNA
VCC_LNA
17
25
16
OUT_IFA
VCC_IF
FBC2
FBC1
IN_IFA
VEE_IF
OUT_MIX2
TH71111
32
9
8
VEE_LNAC
GAIN_LNA
OUT_LNA
IN_MIX1
VEE_MIX
IF_1P
IF_1N
VCC_MIX
1
General Description
The TH71111 FSK/ASK single-conversion superheterodyne receiver 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
800 MHz to 930 MHz (e.g. for applications according to FCC part 15).
39010 71111
Rev. 014
Page 1 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
Document Content
1
Theory of Operation ...................................................................................................3
1.1
General ............................................................................................................................. 3
1.2
Technical Data Overview.................................................................................................. 3
1.3
Block Diagram .................................................................................................................. 4
1.4
Mode Configurations ........................................................................................................ 4
1.5
LNA GAIN Control ............................................................................................................ 4
1.6
Frequency Planning.......................................................................................................... 4
1.6.1
1.6.2
Selected Frequency Plans........................................................................................................... 5
Maximum Frequency Coverage................................................................................................... 5
2
Pin Definitions and Descriptions ..............................................................................6
3
Technical Data............................................................................................................9
4
3.1
Absolute Maximum Ratings .............................................................................................. 9
3.2
Normal Operating Conditions ........................................................................................... 9
3.3
Crystal Parameters ........................................................................................................... 9
3.4
DC Characteristics.......................................................................................................... 10
3.5
AC System Characteristics ............................................................................................. 11
Test Circuits .............................................................................................................12
4.1
Standard FSK Reception ................................................................................................ 12
4.1.1
4.1.2
4.2
Standard FSK Application Circuit .............................................................................................. 12
Standard FSK Component List .................................................................................................. 13
Narrow Band FSK Reception.......................................................................................... 14
4.2.1
4.2.2
4.3
Narrow Band FSK Application Circuit ........................................................................................ 14
Narrow Band FSK Component List............................................................................................ 15
ASK Reception ............................................................................................................... 16
4.3.1
4.3.2
5
ASK Application Circuit .............................................................................................................. 16
ASK Component List.................................................................................................................. 17
Package Description ................................................................................................18
5.1
Soldering Information ..................................................................................................... 18
6
Reliability Information .............................................................................................19
7
ESD Precautions ......................................................................................................19
8
Disclaimer .................................................................................................................20
39010 71111
Rev. 014
Page 2 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
1
Theory of Operation
1.1
General
With the TH71111 receiver chip, various circuit configurations can be arranged in order to meet a number of
different customer requirements. For FSK reception the IF tank used in the phase coincidence demodulator
can be constituted by an external ceramic discriminator. In ASK configuration, the RSSI signal is fed to an
ASK detector, which is constituted by the operational amplifier.
A double-conversion variant, called TH71112, is also available. This receiver IC allows a higher degree of
image rejection, achieved in conjunction with an RF front-end filter. Both RXICs have the same die. At the
TH71112, the second mixer (MIX2) is used to down-convert the first IF (IF1) to the second IF (IF2). At the
TH71111, MIX2 operates as an amplifier.
Efficient RF front-end filtering is realized by using a SAW, ceramic or helix filter in front of the LNA and by
adding an LC filter at the LNA output.
The TH71111 receiver IC consists of the following building blocks:
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
1.2
PLL synthesizer (PLL SYNTH) for generation of the local oscillator signal LO, parts of the PLL SYNTH
are: the high-frequency VCO1, the feedback divider DIV_32, a phase-frequency detector (PFD) with
charge pump (CP) and a crystal-based reference oscillator (RO)
Low-noise amplifier (LNA) for high-sensitivity RF signal reception
First mixer (MIX1) for down-conversion of the RF signal to the IF
IF pre amplifier which is a mixer cell (MIX2) that operates as an amplifier
IF amplifier (IFA) to amplify and limit the IF signal and for RSSI generation
Phase coincidence demodulator (DEMOD) with third mixer (MIX3) to demodulate the IF signal
Operational amplifier (OA) for data slicing, filtering and ASK detection
Bias circuitry for bandgap biasing and circuit shutdown
Technical Data Overview
ˆ
ˆ
ˆ
ˆ
ˆ
Input frequency range: 800 MHz to 930 MHz
Power supply range: 2.3 V to 5.5 V @ ASK
Temperature range: -40 °C to +85 °C
Standby current: 50 nA
Operating current: 7.5 mA @ low gain mode
9.2 mA @ high gain mode
ˆ Sensitivity: -112 dBm @ ASK 1)
-106 dBm @ FSK 2)
ˆ Maximum data rate: 260 kbps NRZ @ ASK
180 kbps NRZ @ FSK
ˆ Range of IF: 400 kHz to 22 MHz
ˆ Maximum input level: -10 dBm @ ASK
0 dBm @ FSK
ˆ Image rejection: > 45 dB (e.g. with 868.3 MHz
SAW front-end filter and at 10.7 MHz IF)
ˆ Spurious emission: < -70 dBm
ˆ Input frequency acceptance range: up to ±100 kHz
ˆ RSSI range: 70 dB
ˆ FSK deviation range: ±2.5 kHz to ±80 kHz
1) at 4 kbps NRZ, BER = 3⋅10-3, 180 kHz IF filter BW, without SAW front-end-filter loss
2) at 4 kbps NRZ, BER = 3⋅10-3, ± 20 kHz FSK deviation, 180 kHz IF filter BW, without SAW front-end-filter loss
39010 71111
Rev. 014
Page 3 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
IN_LNA
31
21
14
15
16
MIX1
IF
LNA
MIX2
IN_DEM
13
OUT_IFA
12
RSSI
11
FBC1
10
IN_IFA
9
VEE_IF
8
OUT_MIX2
7
VCC_MIX
6
IF1N
5
IF1P
4
VEE_MIX
3
IN_MIX1
2
OUT_LNA
1
GAIN_LNA
Block Diagram
VEE_LNAC
1.3
OUTP
MIX3
IF
23
IFA
OUTN
24
LO
OAP
OA
20
OAN
19
PFD
OUT_OA
RO
27
28
22
17
VCC_BIAS
25
ENRX
26 RO
VCC_PLL
29 LF
VEE_RO
30
18
CP
VEE_LNA
32
VCC_LNA
VCO1
BIAS
VEE_BIAS
DIV_32
Fig. 1: TH71111 block diagram
1.4
Mode Configurations
ENRX
Mode
Description
0
RX standby
RX disabled
1
RX active
RX enable
Note: ENRX are pulled down internally
1.5
LNA GAIN Control
VGAIN_LNA
Mode
Description
< 0.8 V
HIGH GAIN
LNA set to high gain
> 1.4 V
LOW GAIN
LNA set to low gain
Note: hysteresis between gain modes to ensure stability
1.6
Frequency Planning
Frequency planning is straightforward for single-conversion applications because there is only one IF that
can be chosen, and then the only possible choice is low-side or high-side injection of the LO signal (which is
now the one and only LO signal in the receiver).
The receiver’s single-conversion architecture requires careful frequency planning. Besides the desired RF
input signal, there are a number of spurious signals that may cause an undesired response at the output.
Among them is the image of the RF signal that must be suppressed by the RF front-end filter.
39010 71111
Rev. 014
Page 4 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
By using the internal PLL synthesizer of the TH71111 with the fixed feedback divider ratio of N = 32
(DIV_32), two types of down-conversion are possible: low-side injection of LO and high-side injection of LO.
The following table summarizes some equations that are useful to calculate the crystal reference frequency
(REF) and the LO frequency, for a given RF and IF.
1.6.1
Injection type
low
high
REF
(RF – IF)/32
(RF + IF)/32
LO
32 • REF
32 • REF
IF
RF – LO
LO – RF
RF image
RF – 2IF
RF + 2IF
Selected Frequency Plans
The following table depicts crystal, LO and image signals considering the examples of 868.3 MHz and
915 MHz RF reception at IF = 10.7 MHz.
Signal type
RF = 868.3 MHz
RF = 868.3 MHz
RF = 915 MHz
RF = 915 MHz
Injection type
low
high
low
high
REF / MHz
26.80000
27.46875
28.25938
28.92813
LO / MHz
857.6
879.0
904.3
925.7
RF image / MHz
846.9
889.7
893.6
936.4
The selection of the reference crystal frequency is based on some assumptions. As for example: the image
frequency should not be in a radio band where strong interfering signals might occur (because they could
represent parasitic receiving signals), the LO signal should be in the range of 800 MHz to 930 MHz (because
this is the optimum frequency range of the VCO1). Furthermore the IF should be as high as possible to
achieve highest RF image rejection. The columns in bold depict the selected frequency plans to receive at
868.3 MHz and 915 MHz, respectively.
1.6.2
Maximum Frequency Coverage
Parameter
fmin
fmax
Injection type
high
low
RF / MHz
789.3
940.7
REF / MHz
25.0
29.0625
LO / MHz
800
930
IF/ MHz
10.7
10.7
39010 71111
Rev. 014
Page 5 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
2
Pin Definitions and Descriptions
Pin No.
3
Name
OUT_LNA
I/O Type
Functional Schematic
analog
output
Description
LNA open-collector output,
to be connected to external
LC tank that resonates at
RF
OUT_LNA
3
31
IN_LNA
analog
input
1
VEE_LNAC
ground
2
GAIN_LNA
analog
input
5k
IN_LNA
VEE_LNAC
31
ground of LNA core (cascode)
1
LNA gain control
(input with hysteresis)
GAIN_LNA
400Ω
RX standby: no pull-up
RX active: pull-up
2
4
IN_MIX1
LNA input, approx.
26Ω single-ended
analog
input
MIX1 input, approx. 33Ω
single-ended
13Ω
IN_MIX1
4
13Ω
500µA
5
VEE_MIX
ground
6
IF1P
analog I/O
ground of MIX1 and MIX2
VCC
20p
IF1P
IF1N
20p
7
6
7
IF1N
analog I/O
open-collector output, to be
connected to external LC
tank that resonates at first IF
2x500µA
VEE
VEE
8
VCC_MIX
supply
9
OUT_MIX2
analog
output
open-collector output, to be
connected to external LC
tank that resonates at first IF
positive supply of
MIX1 and MIX2
6.8k
OUT_MIX2
MIX2 output, approx. 330Ω
output impedance
130Ω
9
230µA
10
VEE_IF
39010 71111
Rev. 014
ground
ground of IFA and DEMOD
Page 6 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
Pin No.
11
12
Name
IN_IFA
FBC1
I/O Type
Functional Schematic
analog
input
analog I/O
IN_IFA
FBC1
11
12
2.2k
analog I/O
FBC2
to be connected to external
IFA feedback capacitor
2.2k
200µA
FBC2
IFA input, approx. 2.2kΩ
input impedance
VCC
VCC
VEE
VCC
13
Description
VEE
VEE
to be connected to external
IFA feedback capacitor
13
VEE
14
VCC_IF
supply
positive supply of
IFA and DEMOD
15
OUT_IFA
analog I/O
IFA output and MIX3 input
(of DEMOD)
OUT_IFA
15
40µA
16
IN_DEM
analog
input
DEMOD input, to MIX3 core
47k
IN_DEM
16
17
VCC_BIAS
supply
positive supply of general
bias system and OA
18
OUT_OA
analog
output
OA output, 40uA current
drive capability
OUT_OA
50Ω
18
19
OAN
analog
input
negative OA input
20µA
OAN
20
OAP
39010 71111
Rev. 014
analog
input
50Ω
50Ω
OAP
positive OA input
20
19
Page 7 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
Pin No.
21
Name
RSSI
I/O Type
Functional Schematic
analog
output
50Ω
RSSI
Description
RSSI output, for RSSI and
ASK detection, approx.
36kΩ output impedance
I (Pi)
21
36k
22
VEE_BIAS
ground
ground of general
bias system and OA
23
OUTP
analog
output
FSK positive output, output
impedance of 100kΩ to
300kΩ
24
OUTN
analog
output
OUTP
OUTN
50Ω
23
24
20µA
20µA
FSK negative output, output
impedance of 100kΩ to
300kΩ
25
VEE_RO
ground
ground of DIV, PFD, RO
and charge pump
26
RO
analog
input
RO input, Colpitts type
oscillator with internal feedback capacitors
50k
RO
26
30p
30p
27
VCC_PLL
supply
positive supply of DIV, PFD,
RO and charge pump
28
ENRX
digital
input
mode control input,
CMOS-compatible with
internal pull-down circuit
ENRX
1.5k
28
29
LF
analog I/O
charge pump output and
VCO1 control input
LF
200Ω
29
400Ω
4p
30
VEE_LNA
ground
ground of LNA biasing
32
VCC_LNA
supply
positive supply of
LNA biasing
39010 71111
Rev. 014
Page 8 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
3
Technical Data
3.1
Absolute Maximum Ratings
Parameter
Supply voltage
Input voltage
Input RF level
Storage temperature
Junction temperature
Thermal Resistance
Power dissipation
Electrostatic discharge
Symbol
VCC
VIN
PiRF
TSTG
TJ
RthJA
Pdiss
VESD1
VESD2
Condition / Note
Min
Max
Unit
0
- 0.3
V
V
dBm
°C
°C
K/W
W
-1.0
-0.75
7.0
Vcc+0.3
10
+125
+150
60
0.1
+1.0
+0.75
Min
Max
Unit
2.5
2.6
2.7
2.3
-40
5.5
5.5
5.5
5.5
+85
0.3*VCC
@ LNA input
-40
human body model, 3)
human body model, 4)
kV
3) all pins except OUT_LNA, IF1P and IF1N
4) pin OUT_LNA, IF1P and IF1N
3.2
Normal Operating Conditions
Parameter
Symbol
VCC, FSK
Supply voltage
Operating temperature
Input low voltage (CMOS)
Input high voltage (CMOS)
Input frequency range
IF range
XOSC frequency
VCO frequency
Frequency deviation
FSK data rate
ASK data rate
VCC, ASK
TA
VIL
VIH
fi
fIF
fref
fLO
Δf
RFSK
RASK
Condition
0 °C to 85 °C
-20 °C to 85 °C
-40 °C to 85 °C
-40 °C to 85 °C
ENRX pin
ENRX pin
set by the crystal
fLO = 16 • fref
0.7*VCC
789.3
0.4
25
800
±2.5
940.7
22
29.063
930
V
ºC
V
V
MHz
MHz
MHz
MHz
±80
180
260
kbps
kbps
Min
Max
Unit
25
10
29.063
15
7
50
MHz
pF
pF
NRZ, C15 = NIP, 5)
NRZ, C16 = NIP, 5)
kHz
5) BIF = 400 kHz, PIN = -90 dBm
3.3
Crystal Parameters
Parameter
Crystal frequency
Load capacitance
Static capacitance
Series resistance
39010 71111
Rev. 014
Symbol
f0
CL
C0
R1
Condition
fundamental mode, AT
Page 9 of 22
Ω
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
3.4
DC Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at TA= 23 °C and VCC = 3 V
Parameter
Symbol
Condition
Min
Typ
Max
Unit
4.5
50
7.5
100
12.0
nA
mA
5.0
9.2
14.0
mA
2
0.3*Vcc
VCC+0.3
10
V
V
µA
Operating Currents
Standby current
Supply current at low gain
ISBY
ICC, low
Supply current at high gain
ICC, high
ENRX=0
ENRX=1
GAIN_LNA=1
ENRX=1
GAIN_LNA=0
Digital Pin Characteristics
Input low voltage CMOS
Input high voltage CMOS
Pull down current
ENRX pin
Low level input current
ENRX pin
VIL
VIH
IPDEN
ENRX pin
ENRX pin
ENRX=1
-0.3
0.7*VCC
0.1
IINLEN
ENRX=0
0.05
µA
IINHGAIN
GAIN_LNA=1
0.05
µA
IPUGAINa
GAIN_LNA=0
ENRX=1
GAIN_LNA=0
ENRX=0
ENRX=1
ENRX=1
0.3
µA
0.05
µA
0.7
V
V
35
50
150
mV
nA
nA
Analog Pin Characteristics
High level input current
GAIN_LNA pin
Pull up current
GAIN_LNA pin active
Pull up current
GAIN_LNA pin standby
IPUGAINs
High gain input voltage
Low gain input voltage
VIHGAIN
VILGAIN
0.08
0.15
1.5
Opamp Characteristics
Opamp input offset voltage
Opamp input offset current
Opamp input bias current
Voffs
Ioffs
Ibias
IOAP – IOAN
0.5 * (IOAP + IOAN)
-35
-50
-150
RSSI Characteristics
RSSI voltage at low input level
VRSSI, low
RSSI voltage at high input level
VRSSI, high
39010 71111
Rev. 014
Pi = -65 dBm,
GAIN_LNA=1
Pi = -35 dBm,
GAIN_LNA=1
Page 10 of 22
0.5
1.0
1.5
V
1.2
1.9
2.5
V
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
3.5
AC System Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at TA = 23 °C and VCC = 3 V,
RF at 868.3 MHz; SAW frond-end filter loss and IF at 10.7 MHz;
all parameters based on test circuits as shown in Fig. 2, Fig.3 and Fig. 5
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Receive Characteristics
BIF = 180kHz,
Δf = ±20kHz,
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
BIF = 30kHz,
Δf = ±5kHz,
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
BIF = 180kHz,
4kbps NRZ,
BER ≤ 3⋅10-3, 6)
-103
dBm
-105
dBm
-109
dBm
BER ≤ 3⋅10-3
GAIN_LNA = 1
0
dBm
-10
dBm
Input sensitivity – FSK
(standard)
Pmin, ST
Input sensitivity – FSK
(narrow band)
Pmin, NB
Input sensitivity – ASK
Pmin, ASK
Maximum input signal – FSK
Pmax, FSK
Maximum input signal – ASK
Pmax, ASK BER ≤ 3⋅10-3
GAIN_LNA = 1
Pspur
Spurious emission
Image rejection
ΔPimag
-70
dBm
dB
0.9
ms
45
Start-up Parameters
Crystal start-up time
Receiver start-up time
TXTL
TRX
ENRX from 0 to 1
ENRX from 0 to 1,
depends on data slicer
time constant,
valid data at output
TXTL
+
R4 · C17
PLL Parameters
VCO gain
Charge pump current
KVCO
ICP
350
60
MHz/V
µA
6) incl. 3 dB loss of front-end SAW filter
39010 71111
Rev. 014
Page 11 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4
Test Circuits
4.1
Standard FSK Reception
4.1.1
Standard FSK Application Circuit
OUTP
RSSI
C15
C16
R5
R4
FSK output
C17
VCC
C3
R2
C10
VCC 17
OAN 19
VEE
GAIN_LNA
OUT_LNA
IN_MIX1
VEE
IF1P
IF1N
VCC
VEE 10
2
3
4
5
6
7
8
OUT_MIX2 9
CERFIL
C7
SAWFIL
L1
C4
RL2
4
3
FBC1 12
1
32 VCC
C11
C9
IN_IFA 11
RL1
6
OUT_OA 18
TH71111
29 LF
VCC
FBC2 13
30 VEE
VCC
C12
VCC 14
31 IN_LNA
1
OAP 20
OUT_IFA 15
26 RO
28 ENRX
R1
CERDIS
16
27 VCC
ENRX
C5
RSSI 21
25 VEE
C1
L2
VEE 22
24
XTAL
OUTP 23
VCC
L3
CB*
VCC
50
RF input
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 2: Test circuit for FSK reception
Circuit Features
• Tolerates input frequency variations
• Well-suited for NRZ, Manchester and similar codes
39010 71111
Rev. 014
Page 12 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4.1.2
Standard FSK Component List
Part
Size
Value
@ 868.3 MHz
C1
0805
22 pF
±5%
C3
0603
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
±5%
capacitor to match SAW filter input
C5
0603
2.7 pF
±5%
capacitor to match SAW filter output
C7
0603
1.0 pF
±5%
MIX1 input matching capacitor
Tolerance
Description
crystal series capacitor
C9
0603
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
±10%
IFA feedback capacitor
C12
0805
10 pF
±5%
DEMOD phase-shift capacitor
C15
0805
100 pF
±5%
demodulator output low-pass capacitor,
this value for data rates < 20 kbps NRZ
C16
0805
1.5 nF
±10%
RSSI output low-pass capacitor
C17
0805
10 nF
±10%
data slicer capacitor, this value for data rates > 0.8 kbps NRZ
R1
0603
10 kΩ
±5%
loop filter resistor
R2
0603
330 Ω
±5%
optional CERFIL output matching resistor
R4
0805
330 kΩ
±5%
data slicer resistor
R5
0805
220 kΩ
±5%
loading resistor
RL1
0805
470 Ω
±5%
MIX1 bias resistor
RL2
0805
470 Ω
±5%
MIX1 bias resistor
L1
0603
22 nH
±5%
L2
0603
22 nH
±5%
SAW filter matching inductor from Würth-Elektronik
(WE-KI series), or equivalent part
L3
0603
10 nH
±5%
XTAL
SMD
6x3.5
26.80000 MHz
@ RF = 868.3 MHz
±25ppm cal.
±30ppm temp.
SAWFIL
SMD
3x3
SAFCC868MSL0X00
(f0 =868.3 MHz)
B3dB = 2 MHz
CERFIL
SMD
3.45x3.1
SFECF10M7HA00
B3dB = 180 kHz
CERDIS
SMD
4.5x2
CDSCB10M7GA135
LNA output tank inductor from Würth-Elektronik (WE-KI series),
or equivalent part
fundamental-mode crystal from
Telcona/Horizon or equivalent par
low-loss SAW filter from Murata, or equivalent part
ceramic filter from Murata, or equivalent part
ceramic discriminator from Murata, or equivalent part
• For component values for other frequencies, please refer to the EVB descriptions
39010 71111
Rev. 014
Page 13 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4.2
4.2.1
Narrow Band FSK Reception
Narrow Band FSK Application Circuit
OUTP
RSSI
C16
C15
FSK output
C17
R4
VCC
VCC
R1
OAN 19
VCC 17
C11
FBC1 12
IN_IFA 11
R2
C10
GAIN_LNA
OUT_LNA
IN_MIX1
VEE
IF1P
IF1N
VCC
VEE 10
VEE
VCC
CERDIS
VCC
C9
30 VEE
1
2
3
4
5
6
7
8
32 VCC
C12
FBC2 13
TH71111
29 LF
OUT_MIX2 9
CERFIL
C7
L1
RL2
SAWFIL
RL1
4
3
OUT_OA 18
VCC 14
31 IN_LNA
6
OAP 20
OUT_IFA 15
26 RO
28 ENRX
C3
1
16
27 VCC
ENRX
C5
RSSI 21
25 VEE
C1
L2
VEE 22
24
XTAL
OUTP 23
CP
L3
C4
CB*
VCC
50
RF input
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 3: Test circuit for FSK reception (narrow band)
Circuit Features
• Applicable for narrow band FSK
39010 71111
Rev. 014
Page 14 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4.2.2
Narrow Band FSK Component List
Part
Size
Value
@ 868.3 MHz
C1
0805
22 pF
±5%
C3
0603
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
±5%
capacitor to match SAW filter input
C5
0603
2.7 pF
±5%
capacitor to match SAW filter output
C7
0603
1.0 pF
±5%
MIX1 input matching capacitor
Tolerance
Description
crystal series capacitor
C9
0603
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
±10%
IFA feedback capacitor
C12
0805
1.5 pF
±5%
DEMOD phase-shift capacitor
C15
0805
220 pF
±5%
demodulator output low-pass capacitor,
this value for data rates < 10 kbps NRZ
C16
0805
1.5 nF
±10%
RSSI output low-pass capacitor
C17
0805
10 nF
±10%
data slicer capacitor, this value for data rates > 0.8 kbps NRZ
CP
0603
6.8 - 8.2 pF
±5%
ceramic resonator loading capacitor
R1
0603
10 kΩ
±5%
loop filter resistor
R2
0603
330 Ω
±5%
optional CERFIL output matching resistor
R4
0805
330 kΩ
±5%
data slicer resistor, this value for 0.4 to 10 kbps NRZ
RL1
0805
470 Ω
±5%
MIX1 bias resistor
RL2
0805
470 Ω
±5%
MIX1 bias resistor
L1
0603
22 nH
±5%
L2
0603
22 nH
±5%
SAW filter matching inductor from Würth-Elektronik
(WE-KI series), or equivalent part
L3
0603
10 nH
±5%
XTAL
SMD
6x3.5
26.80000 MHz
@ RF = 868.3 MHz
±25ppm cal.
±30ppm temp.
SAWFIL
SMD
3x3
SAFCC868MSL0X00
(f0 =868.3 MHz)
B3dB = 2 MHz
low-loss SAW filter from Murata, or equivalent part
Leaded
type
SFKLA10M7NL00
B3dB = 30 kHz
ceramic filter from Murata, or equivalent part
SFVLA10M7LF00
B3dB = 80 kHz
optional, ceramic filter from Murata, or equivalent part
SMD
4.5x2
CDSCB10M7GA135
CERFIL
CERDIS
LNA output tank inductor from Würth-Elektronik (WE-KI series),
or equivalent part
fundamental-mode crystal from
Telcona/Horizon or equivalent par
ceramic discriminator from Murata, or equivalent part
• For component values for other frequencies, please refer to the EVB descriptions
39010 71111
Rev. 014
Page 15 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4.3
4.3.1
ASK Reception
ASK Application Circuit
RSSI
C16
ASK output
C17
VCC
VCC
C3
VCC 17
OAN 19
OUT_OA 18
FBC1 12
IN_IFA 11
R2
C10
VEE
GAIN_LNA
OUT_LNA
IN_MIX1
VEE
IF1P
IF1N
VCC
VEE 10
1
2
3
4
5
6
7
8
OUT_MIX2 9
CERFIL
C7
L1
C4
RL2
SAWFIL
RL1
4
3
VCC
C11
C9
30 VEE
32 VCC
VCC
FBC2 13
TH71111
29 LF
31 IN_LNA
6
OAP 20
VCC 14
28 ENRX
R1
1
16
OUT_IFA 15
26 RO
27 VCC
ENRX
C5
RSSI 21
25 VEE
C1
L2
VEE 22
24
XTAL
OUTP 23
R4
L3
CB*
VCC
50
RF input
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 5: Test circuit for ASK reception
39010 71111
Rev. 014
Page 16 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
4.3.2
ASK Component List
Part
Size
Value
@ 868.3 MHz
C1
0805
22 pF
±5%
C3
0603
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
±5%
capacitor to match SAW filter input
C5
0603
2.7 pF
±5%
capacitor to match SAW filter output
C7
0603
1.0 pF
±5%
MIX1 input matching capacitor
Tolerance
Description
crystal series capacitor
C9
0603
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
±10%
IFA feedback capacitor
C16
0805
1.5 nF
±10%
RSSI output low-pass capacitor,
this value for data rates < 10 kbps NRZ,
for higher data rates decrease the value
C17
0805
10 nF
±10%
data slicer capacitor,
this value for data rates > 0.8 kbps NRZ,
for lower data rates increase the value
R1
0603
10 kΩ
±5%
loop filter resistor
R2
0603
330 Ω
±5%
optional CERFIL output matching resistor
R4
0805
330 kΩ
±5%
data slicer resistor
RL1
0805
470 Ω
±5%
MIX1 bias resistor
RL2
0805
470 Ω
±5%
MIX1 bias resistor
L1
0603
22 nH
±5%
L2
0603
22 nH
±5%
SAW filter matching inductor from Würth-Elektronik
(WE-KI series), or equivalent part
L3
0603
10 nH
±5%
XTAL
SMD
6x3.5
26.80000 MHz
@ RF = 868.3 MHz
±25ppm cal.
±30ppm temp.
SAWFIL
SMD
3x3
SAFCC868MSL0X00
(f0 =868.3 MHz)
B3dB = 2 MHz
SMD
3.45x3.1
SFECF10M7HA00
B3dB = 180 kHz
ceramic filter from Murata, or equivalent part
Leaded
type
SFVLA10M7LF00
B3dB = 80 kHz
optional, ceramic filter from Murata, or equivalent part
CERFIL
LNA output tank inductor from Würth-Elektronik (WE-KI series),
or equivalent part
fundamental-mode crystal from
Telcona/Horizon or equivalent par
low-loss SAW filter from Murata, or equivalent part
• For component values for other frequencies, please refer to the EVB descriptions
39010 71111
Rev. 014
Page 17 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
5
Package Description
The device TH71111 is RoHS compliant.
D
D1
A
24
17
16
25
b
E
e
E1
32
9
1
8
A2
A1
12° +1°
0.25
(0.0098)
c
12° +1°
L
.10 (.004)
Fig. 6: LQFP32 (Low profile Quad Flat Package)
All Dimension in mm, coplanaríty < 0.1mm
min
max
E1, D1
E, D
A
A1
A2
e
b
c
L
α
7.00
9.00
1.40
1.60
0.05
0.15
1.35
1.45
0.8
0.30
0.45
0.09
0.20
0.45
0.75
0°
7°
0.053
0.057
0.031
0.012
0.018
0.0035
0.0079
0.018
0.030
0°
7°
All Dimension in inch, coplanaríty < 0.004”
min
max
5.1
0.276
0.354
0.055
0.063
0.002
0.006
Soldering Information
•
39010 71111
Rev. 014
The device TH71111 is qualified for MSL3 with soldering peak temperature 260 deg C
according to JEDEC J-STD-20
Page 18 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
6 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 for Nonhermetic Solid State Surface Mount Devices (classification reflow profiles according to table 5-2)”
Wave Soldering SMD’s (Surface Mount Devices)
•
EN60749-20
“Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat”
Solderability SMD’s (Surface Mount Devices)
•
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.
7 ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
39010 71111
Rev. 014
Page 19 of 22
Data Sheet
April/08
TH71111
868/915MHz
FSK/ASK Receiver
8
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.
For the latest version of this document, go to our website at:
www.melexis.com
Or for additional information contact Melexis Direct:
Europe, Africa:
Americas:
Asia:
Phone: +32 1367 0495
E-mail: [email protected]
Phone: +1 603 223 2362
E-mail: [email protected]
Phone: +32 1367 0495
E-mail: [email protected]
ISO/TS 16949 and ISO14001 Certified
39010 71111
Rev. 014
Page 20 of 22
Data Sheet
April/08