ETC EVB71111

EVB71111
868/915MHz Receiver
Evaluation Board Description
Features
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Single superhet architecture for low external component count
FSK for digital data and FM reception for analog signal transmission
FM/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
Ordering Information
Part No.
EVB71111-868-FSK
EVB71111-868-FM
EVB71111-868-ASK
EVB71111-915-FSK
EVB71111-915-FM
EVB71111-915-ASK
Applications
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General digital and analog 868 MHz or 915 MHz ISM band usage
Low-power telemetry
Alarm and security systems
Keyless car and central locking
Pagers
Technical Data Overview
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Input frequency range: 800 MHz to 930 MHz
Power supply range: 2.5 V to 5.5 V at 868 MHz and 3.3 V to 5.5 V at 915 MHz
Temperature range: -40 °C to +85 °C
Operating current: 7.5 mA at low gain and 9.2 mA at high gain mode
Standby current: < 100 nA
1)
with 40 kHz IF filter BW (incl. SAW front-end filter loss)
Sensitivity: -109 dBm
2)
Sensitivity: -102 dBm with 150 kHz IF filter BW (incl. SAW front-end filter loss)
Range of IF: 455 kHz to 21.4 MHz
Maximum input level: –10 dBm at ASK and 0 dBm at FSK
Input impedance: 50 Ω
Image rejection: > 55 dB (e.g. with SAW front-end filter and at 10.7 MHz IF)
Spurious emission: < -70 dBm
Input frequency acceptance: ±50 kHz (with AFC option)
RSSI range: 70 dB
Frequency deviation range: ±5 kHz to ±120 kHz
Max. data rate: 80 kbit/s NRZ
Max. analog modulation frequency: 15 kHz
1)
2)
at ± 8 kHz FSK deviation, BER = 3⋅10 and phase-coincidence demodulation
-3
at ± 50 kHz FSK deviation, BER = 3⋅10 and phase-coincidence demodulation
390127111101
Rev. 004
-3
1 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
General Description
The TH71111 receiver IC consists of the following building blocks
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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
With the TH71111 receiver chip, various circuit configurations can be arranged in order to meet a number of
different customer requirements. For FM/FSK reception the IF tank used in the phase coincidence demodulator can be constituted either by a ceramic resonator or an LC tank (optionally with a varactor diode to create
an AFC circuit). In ASK configuration, the RSSI signal is feed to an ASK detector, which is constituted by the
operational amplifier.
Demodulation
Type of receiver
FM / FSK
narrow-band RX with ceramic demodulation tank
FM / FSK
wide-band RX with LC demodulation tank
ASK
RX with RSSI-based demodulation
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 frontend 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 frontend 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.
390127111101
Rev. 004
2 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
18
OUT_OA
19
20
OA
OAN
OAP
24
23
OUTN
OUTP
Block Diagram
17
VCC_BIAS
BIAS
ENRX
28
16
MIX3
IN_DEM
22
VEE_BIAS
15
OUT_IFA
27
14
VCC_PLL
VEE_RO
26
13
FPC2
RO
RO
IFA
21
25
RSSI
12
FBC1
11
PFD
IN_IFA
8
MIX2
29
VCC_MIX
DIV_32
9
CP
IF
OUT_MIX2
LF
10
VEE_IF
IF
7
IF1N
VCO1
MIX1
5
VEE_MIX
LO
6
IF1P
4
IN_MIX1
VEE_LNA
GAIN_LNA
VCC_LNA
32
LNA
31
1
VEE_LNAC
IN_LNA
2
30
3
OUT_LNA
Fig. 1: TH71111 block diagram
390127111101
Rev. 004
3 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Frequency Planning
Frequency planning is straightforward for single-conversion applications because there is only one IF that
might 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.
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),
the IF and the LO frequency respectively, for a given RF.
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
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 MHz
RF = 868 MHz
RF = 915 MHz
RF = 915 MHz
Injection type
Low
high
low
high
26.80000
27.46875
28.25938
28.92813
LO / MHz
857.6
879.0
904.3
925.7
RF image/MHz
879.0
857.6
925.7
904.3
RF image/MHz
846.9
889.7
893.6
936.4
REF / MHz
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 915 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
866.3 MHz and 915 MHz, respectively.
For more detailed information, please refer to the latest TH71111 data sheet revision.
390127111101
Rev. 004
4 of 16
EVB Description
Aug/02
L1
VCC
ENRX
C4
IN_LNA
GND
RO
SAWFIL
VCC
VCC
C5
L2
C2
R1
CB2
C3
C1
C_RO
XTAL
25 VEE
CB8
CB1
32 VCC
31 IN_LNA
30 VEE
29 LF
28 ENRX
27 VCC
26 RO
1
OUTP 23
2
GAIN_LNA
C14
C15
C16
1 2
4
C7
C6
3
L3
5
7
16
VEE 10
IN_IFA 11
FBC1 12
FBC2 13
VCC 14
OUT_IFA 15
8
CB7
CB6
CB5
C13
VCC
CB3
OUT_MIX2 9
1 2
6
TH71111
VEE 22
OUT_LNA
1 2
OUTN
GND
IN_MIX1
1 2
1 2
IF1P
24
1 2
OAP 20
VEE
RL1
VEE
OAN 19
OUTP
GND
RSSI 21
RSSI
GND
OUT_OA
GND
OUT_OA 18
IF1N
VCC 17
VCC
5 of 16
RL2
390127111101
Rev. 004
R2
C9
CB4
CP
GND
VCC
CERFIL
C10
C11
VCC
CERRES
R_Q
L_OPT
C_OPT
C12
1 2
FSK output
EVB71111
868/915MHz Receiver
Evaluation Board Description
Circuit Diagram for FSK Reception
Fig. 2: Circuit diagram for FSK reception
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
PCB Top View for FSK Reception
VCC
Evaluation Board
CB6
C_OPT
CERFIL
R2
CP
C9
L3
32
1
24
25
C7
0
C6
0
CB1
L2
OUTP
C3
C2
C14
OUTN
6
7
R1
C_RO
L1
IN_LNA
ENRX
C4
RF_input
VCC
RO
1
SAWFIL
5
XTAL
2
TH711xx_ev03_EB_11/00_B
CB2
C5
3
C1
Board size is 44mm x 54mm
390127111101
Rev. 004
RL2
RL1
0
C15
CB5
9
8
17
16
TH71111
RSSI
C16
0
CB7
CB4
OUT_OA
CB3
C12
R_Q
CB8
CERRES
C10
C11
L_OPT
C13
TH7111xx
Melexis
Board layout data in Gerber format is available
6 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Board Component Values for FSK
Part
Size
Value
Value
@ 868 MHz
@ 915 MHz
Tolerance
Description
C1
0805
15 pF
15 pF
±10%
crystal series capacitor
C2
0805
NIP
NIP
±10%
optional loop filter capacitor
C3
0805
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
1 nF
NIP
±5%
capacitor to match to SAW filter input
C5
0603
2.7 pF
NIP
±5%
capacitor to match to SAW filter output
C6
0603
NIP
NIP
±5%
LNA output tank capacitor
C7
0603
1.2 pF
0.47 pF
±5%
MIX1 input matching capacitor
C8
0603
NIP
NIP
±5%
IF1 tank capacitor
C9
0805
33 nF
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C12
0603
1.5 pF
1.5 pF
±5%
DEMOD phase-shift capacitor
C13
0603
680 pF
680 pF
±10%
DEMOD coupling capacitor
CP
0805
10 – 12 pF
10 – 12 pF
±5%
CERRES tuning capacitor
C14
0805
10 – 47 pF
10 – 47 pF
±5%
C15
0805
10 – 47 pF
10 – 47 pF
±5%
C16
0603
330 pF
330 pF
±10%
demodulator output low-pass capacitor,
depending on data rate
demodulator output low-pass capacitor,
depending on data rate
RSSI output low-pass capacitor
CB1 to CB5
CB7 to CB8
CB6
0603
330 pF
330 pF
±10%
blocking capacitor for VCC
0805
33 nF
33 nF
±10%
blocking capacitor for VCC
R1
0805
10 kΩ
10 kΩ
±10%
loop filter resistor
R2
0805
390 Ω
390 Ω
±5%
CERFIL output matching resistor
RL1
0805
470 Ω
470 Ω
±5%
MIX1 bias resistor
RL2
0805
MIX1 bias resistor
0603
470 Ω
18 nH
±5%
L1
470 Ω
12 nH
±5%
Inductor, to match SAW filter
L2
0603
12 nH
C=220 pF
±5%
Inductor (capacitor), to match SAW filter
L3
0603
6.8 nH
±5%
LNA output tank inductor
L_OPT
1006
6.8 nH
NIP
NIP
±5%
demodulator phase shift inductor, only
required at FSK/FM with LC resonator
C_OPT
3mm
NIP
NIP
±5%
demodulator phase shift capacitor, only
required at FSK/FM with LC resonator
R_Q
0805
NIP
NIP
±5%
C_RO
0805
330 pF
330 pF
±5%
XTAL
HC49
SMD
26.80000 MHz
@ RF = 868.3 MHz
28.25938 MHz
@ RF = 915 MHz
±25ppm calibr.
±30ppm temp.
optional lower-Q resistor, only
required at FSK/FM with LC resonator
optional capacitor
to couple external RO signal
fundamental-mode crystal, Cload = 10 pF
to 15pF, C0, max = 7 pF, Rm, max = 50 Ω
SAWFIL
QCC8C
B3570
(f0 = 868.30 MHz)
low-loss SAW filter from EPCOS
B3dB = 1.7 MHz
B3569
(f0 = 914.50 MHz)
CERFIL
CERRES
B3dB = 25 MHz
Leaded
type
SFE10.7MFP
@ BIF2 = 40 kHz
SFE10.7MFP
@ BIF2 = 40 kHz
TBD
SMD
type
SFECV10.7MJS-A
@ BIF2 = 150 kHz
SFECV10.7MJS-A
@ BIF2 = 150 kHz
±40 kHz
SMD type CDACV10.7MG18-A CDACV10.7MG18-A
Murata
Murata
ceramic filter from Murata
ceramic demodulator tank, not required
at FSK/FM with LC resonator
NIP – not in place, may be used optionally
390127111101
Rev. 004
7 of 16
EVB Description
Aug/02
L1
VCC
ENRX
C4
IN_LNA
GND
RO
SAWFIL
VCC
VCC
C5
L2
C2
R1
CB2
C3
C1
C_RO
XTAL
25 VEE
CB8
CB1
32 VCC
31 IN_LNA
30 VEE
29 LF
28 ENRX
27 VCC
26 RO
1
OUTP 23
2
C14
1 2
4
C7
C6
3
L3
5
7
16
VEE 10
IN_IFA 11
FBC1 12
FBC2 13
VCC 14
OUT_IFA 15
8
CB7
CB6
CB5
C13
VCC
CB3
C16
OUT_MIX2 9
1 2
6
TH71111
VEE 22
OUT_LNA
1 2
1 2
IN_MIX1
1 2
OUTN
GND
R6
C15
1 2
IF1P
24
VEE
R5
OAP 20
VEE
RL1
GAIN_LNA
R4
R3
OAN 19
OUTP
GND
RSSI 21
RSSI
GND
OUT_OA
GND
OUT_OA 18
IF1N
VCC 17
VCC
8 of 16
RL2
390127111101
Rev. 004
R2
C9
CB4
CP
GND
VCC
CERFIL
C10
C11
VCC
CERRES
R_Q
L_OPT
C_OPT
C12
1 2
FM output
EVB71111
868/915MHz Receiver
Evaluation Board Description
Circuit Diagram for FM Reception
Fig. 3: Circuit diagram for FM reception
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
PCB Top View for FM Reception
VCC
Evaluation Board
CB6
C_OPT
CERFIL
CP
C9
CB5
9
8
32
1
24
25
C15
C6
L3
C5
OUTP
C3
C2
OUTN
6
7
R1
C_RO
L1
IN_LNA
ENRX
C4
RF_input
VCC
RO
XTAL
1
SAWFIL
5
C1
2
TH711xx_ev03_EB_11/00_B
CB2
R6
0
CB1
L2
3
Board size is 44mm x 54mm
390127111101
Rev. 004
RL2
RL1
C7
RSSI
C16
R5
CB7
CB4
TH71111
R3
C14
R4
OUT_OA
CB3
C12
R2
C13
R_Q
CB8
CERRES
C10
C11
L_OPT
17
16
TH7111xx
Melexis
Board layout data in Gerber format is available
9 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Board Component Values for FM
Part
Size
Value
Value
@ 868 MHz
@ 915 MHz
Tolerance
Description
C1
0805
15 pF
15 pF
±10%
crystal series capacitor
C2
0805
NIP
NIP
±10%
optional loop filter capacitor
C3
0805
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
1 nF
NIP
±5%
capacitor to match to SAW filter input
C5
0603
2.7 pF
NIP
±5%
capacitor to match to SAW filter output
C6
0603
NIP
NIP
±5%
LNA output tank capacitor
C7
0603
1.2 pF
0.47 pF
±5%
MIX1 input matching capacitor
C8
0603
NIP
NIP
±5%
IF1 tank capacitor
C9
0805
33 nF
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C12
0603
1.5 pF
1.5 pF
±5%
DEMOD phase-shift capacitor
C13
0603
680 pF
680 pF
±10%
DEMOD coupling capacitor
CP
0805
10 – 12 pF
10 – 12 pF
±5%
CERRES tuning capacitor
C14
0805
100 pF
100 pF
±5%
C15
0805
100 pF
100 pF
±5%
C16
0603
330 pF
330 pF
±10%
sallen-key low-pass filter capacitor, to set
cut-off frequency
sallen-key low-pass filter capacitor, to set
cut-off frequency
RSSI output low-pass capacitor
CB1 to CB5
CB7 to CB8
CB6
0603
330 pF
330 pF
±10%
blocking capacitor for VCC
0805
33 nF
33 nF
±10%
blocking capacitor for VCC
R1
0805
10 kΩ
10 kΩ
±10%
loop filter resistor
R2
330 Ω
330 Ω
12 kΩ
12 kΩ
±5%
±5%
CERFIL output matching resistor
R3
0805
0805
R4
0805
6.8 kΩ
6.8 kΩ
±5%
R5
0805
33 kΩ
33 kΩ
±5%
R6
0805
33 kΩ
33 kΩ
±5%
RL1
0805
470 Ω
470 Ω
±5%
RL2
0805
MIX1 bias resistor
0603
470 Ω
18 nH
±5%
L1
470 Ω
12 nH
±5%
Inductor, to match SAW filter
L2
0603
12 nH
C=220 pF
±5%
Inductor (capacitor), to match SAW filter
L3
0603
6.8 nH
±5%
LNA output tank inductor
NIP
±5%
demodulator phase shift inductor, only
required at FSK/FM with LC resonator
sallen-key filter resistor, to set desired
filter characteristic
sallen-key filter resistor, to set desired
filter characteristic
sallen-key filter resistor, to set cut-off
frequency
sallen-key filter resistor, to set cut-off
frequency
MIX1 bias resistor
L_OPT
1006
6.8 nH
NIP
C_OPT
3mm
NIP
NIP
±5%
demodulator phase shift capacitor, only
required at FSK/FM with LC resonator
R_Q
0805
NIP
NIP
±5%
C_RO
0805
330 pF
330 pF
±5%
optional lower-Q resistor, only
required at FSK/FM with LC resonator
optional capacitor
to couple external RO signal
390127111101
Rev. 004
10 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Value
Value
@ 868 MHz
@ 915 MHz
HC49
SMD
26.80000 MHz
@ RF = 868.3 MHz
28.25938 MHz
@ RF = 915 MHz
QCC8C
B3570
(f0 = 868.30 MHz)
Part
Size
XTAL
SAWFIL
Tolerance
±25ppm calibr.
±30ppm temp.
CERRES
fundamental-mode crystal, Cload = 10 pF
to 15pF, C0, max = 7 pF, Rm, max = 50 Ω
low-loss SAW filters from EPCOS
B3dB = 1.7 MHz
B3569
(f0 = 914.50 MHz)
CERFIL
Description
low-loss SAW filters from EPCOS
B3dB = 25 MHz
Leaded
type
SFE10.7MFP @
BIF2 = 40 kHz
SFE10.7MFP @
BIF2 = 40 kHz
TBD
ceramic filters from Murata
SMD
type
SFECV10.7MJS-A
@ BIF2 = 150 kHz
SFECV10.7MJS-A
@ BIF2 = 150 kHz
±40 kHz
ceramic filters from Murata
SMD type CDACV10.7MG18-A CDACV10.7MG18-A
Murata
Murata
ceramic demodulator tank, not required
at FSK/FM with LC resonator
NIP – not in place, may be used optionally
Your Notes
390127111101
Rev. 004
11 of 16
EVB Description
Aug/02
L1
VCC
ENRX
C4
IN_LNA
GND
RO
SAWFIL
VCC
VCC
C5
L2
C2
R1
CB2
C3
C1
C_RO
XTAL
25 VEE
CB8
32 VCC
31 IN_LNA
30 VEE
29 LF
28 ENRX
27 VCC
26 RO
1
OUTP 23
2
GAIN_LNA
C13
1 2
R3
4
C7
C6
3
L3
5
C12
1 2
7
6
TH71111
VEE 22
OUT_LNA
1 2
OUTN
GND
IN_MIX1
1 2
1 2
IF1P
24
1 2
VEE
RL1
VEE
OAP 20
OUTP
GND
RSSI 21
RSSI
GND
OAN 19
OUT_OA
GND
OUT_OA 18
IF1N
16
VCC
CB3
8
CB7
CB6
CB5
OUT_MIX2 9
VEE 10
IN_IFA 11
FBC1 12
FBC2 13
VCC 14
OUT_IFA 15
VCC 17
VCC
12 of 16
RL2
390127111101
Rev. 004
R2
C9
1 2
ASK output
CB4
GND
VCC
CERFIL
C10
C11
VCC
EVB71111
868/915MHz Receiver
Evaluation Board Description
Circuit Diagram for ASK Reception
Fig. 4: Circuit diagram for ASK reception
EVB Description
Aug/02
CB1
EVB71111
868/915MHz Receiver
Evaluation Board Description
PCB Top View for ASK Reception
VCC
Evaluation Board
CB6
CERFIL
C10
C11
CB7
CB4
9
17
16
TH71111
RL2
RL1
C6
32
1
L3
CB8
RSSI
24
25
C13
C7
R3
0
8
C12
OUT_OA
CB3
C9
C12
C13
R2
CB5
TH7111xx
Melexis
Board layout data in Gerber format is available
0
CB1
CB2
L2
OUTP
OUTN
5
C1
6
7
L1
C_RO
C4
IN_LNA
ENRX
RF_input
Board size is 44mm x 54mm
390127111101
Rev. 004
1
R1
VCC
RO
XTAL
2
SAWFIL
C3
C2
3
TH711xx_ev03_EB_11/00_B
C5
13 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Board Component Values for ASK
Part
Size
Value
Value
@ 868 MHz
@ 915 MHz
Tolerance
Description
C1
0805
15 pF
15 pF
±10%
crystal series capacitor
C2
0805
NIP
NIP
±10%
optional loop filter capacitor
C3
0805
1 nF
±10%
loop filter capacitor
C4
0603
4.7 pF
1 nF
NIP
±5%
capacitor to match to SAW filter input
C5
0603
2.7 pF
NIP
±5%
capacitor to match to SAW filter output
C6
0603
NIP
NIP
±5%
LNA output tank capacitor
C7
0603
1.2 pF
0.47 pF
±5%
MIX1 input matching capacitor
C8
0603
NIP
NIP
±5%
IF1 tank capacitor
C9
0805
33 nF
33 nF
±10%
IFA feedback capacitor
C10
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C11
0603
1 nF
1 nF
±10%
IFA feedback capacitor
C12
0805
1 nF to 10 nF
1 nF to 10 nF
±10%
C13
0603
330 pF
330 pF
±10%
ASK data slicer capacitor, depending on
data rate
RSSI output low-pass capacitor
CB1 to CB5
CB7 to CB8
CB6
0603
330 pF
330 pF
±10%
blocking capacitor for VCC
0805
33 nF
33 nF
±10%
blocking capacitor for VCC
R1
0805
10 kΩ
10 kΩ
±10%
loop filter resistor
R2
0805
0603
330 Ω
100 kΩ
±5%
±5%
CERFIL output matching resistor
R3
330 Ω
100 kΩ
R4
0805
15 kΩ
TBD
±5%
ASK data slicer resistor, depending on
data rate
AGC time constant resistor
RL1
0805
470 Ω
470 Ω
±5%
MIX1 bias resistor
RL2
0805
MIX1 bias resistor
0603
470 Ω
18 nH
±5%
L1
470 Ω
12 nH
±5%
Inductor, to match SAW filter
L2
0603
12 nH
C=220 pF
±5%
Inductor (capacitor), to match SAW filter
L3
0603
6.8 nH
±5%
LNA output tank inductor
C_RO
0805
6.8 nH
330 pF
330 pF
±5%
XTAL
HC49
SMD
26.80000 MHz @
RF = 868.3 MHz
28.25938 MHz @
RF = 915 MHz
±25ppm calibr.
±30ppm temp.
optional capacitor
to couple external RO signal
fundamental-mode crystal, Cload = 10 pF
to 15pF, C0, max = 7 pF, Rm, max = 50 Ω
SAWFIL
QCC8C
B3570
(f0 = 868.30 MHz)
low-loss SAW filters from EPCOS
B3dB = 1.7 MHz
B3569
(f0 = 914.50 MHz)
CERFIL
low-loss SAW filters from EPCOS
B3dB = 25 MHz
Leaded
type
SFE10.7MFP
@ BIF2 = 40 kHz
SFE10.7MFP
@ BIF2 = 40 kHz
TBD
ceramic filters from Murata
SMD
type
SFECV10.7MJS-A
@ BIF2 = 150 kHz
SFECV10.7MJS-A
@ BIF2 = 150 kHz
±40 kHz
ceramic filters from Murata
NIP – not in place, may be used optionally
390127111101
Rev. 004
14 of 16
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Package Dimensions
D
D1
24
17
16
25
E
e
E1
32
9
1
A
A2
b
8
A1
L
Fig. 5: LQFP32
All Dimension in mm, coplanaríty < 0.1mm
E1, D1
A
A1
A2
e
b
min
0.05
1.35
0.30
7.00
0.8
max
1.60
0.15
1.45
0.45
All Dimension in inch, coplanaríty < 0.004”
min
0.002 0.053
0.012
0.276
0.031
max
0.630 0.006 0.057
0.018
390127111101
Rev. 004
15 of 16
L
0.45
E, D
α
0°
9.00
0.75
7°
0.018
0°
0.354
0.030
7°
EVB Description
Aug/02
EVB71111
868/915MHz Receiver
Evaluation Board Description
Disclaimer
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its
Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the
information set forth herein or regarding the freedom of the described devices from patent infringement.
Melexis reserves the right to change 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. This
product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by
Melexis for each application.
The information furnished by Melexis is believed to be correct and accurate. However, 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 technical
data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering
of technical or other services.
© 2002 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 and Japan:
All other locations:
Phone: +32 1367 0495
E-mail: [email protected]
Phone: +1 603 223 2362
E-mail: [email protected]
QS9000, VDA6.1 and ISO14001 Certified
390127111101
Rev. 004
16 of 16
EVB Description
Aug/02