Datasheet TH71111 Datasheet (MELEXIS)

TH71111

868/915MHz

FSK/FM/ASK Receiver

Features

! 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 ! Surface mount package LQFP32

Ordering Information

Part No. Temperature Range Package

TH71111 -40 °C to 85°C LQFP32

Application Examples

! 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

! 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 ! Sensitivity: -109 dBm ! Sensitivity: -102 dBm ! Range of IF: 455 kHz to 21.4 MHz ! Maximum input level: –10 dBm at ASK and 0 dBm at FSK ! 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 ! Maximum data rate: 80 kbit/s NRZ ! Maximum analog modulation frequency: 15 kHz

1)

at ± 8 kHz FSK deviation, BER = 3⋅10-3 and phase-coincidence demodulation

2)

at ± 50 kHz FSK deviation, BER = 3⋅10-3 and phase-coincidence demodulation

1)

with 40 kHz IF filter BW (incl. SAW front-end filter loss)

2)

with 150 kHz IF filter BW (incl. SAW front-end filter loss)

TH71111 Data Sheet Page 1 of 20 Nov. 2001 3901071111 Rev. 005

TH71111

868/915MHz

FSK/FM/ASK Receiver

General Description

The TH71111 receiver IC consists of the following building blocks

" 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 T H71111 receiver c hip, various circuit c onfigurations c an be arranged in or der to m eet a num ber of different custom er requirements . For FM/FSK reception the IF tank used in the phase coincidence dem odulator 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 FM / FSK

ASK

A double-conversion variant, called TH71112, is also available. This receiver IC allows a higher degree of image rejection, achieved in conj unction with an RF frontend filter. Both RXICs have the sam e 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 f iltering 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.

narrow-band RX with ceramic demodulation tank wide-band RX with LC demodulation tank RX with RSSI-based demodulation

TH71111 Data Sheet Page 2 of 20 Nov. 2001 3901071111 Rev. 005

Block Diagram

TH71111

868/915MHz

FSK/FM/ASK Receiver

IN_DEM

OUT_IFA

14

RSSI

21

FPC2

13 15 16

FBC1

12

IN_IFA

11

VEE_IF

10

OUT_MIX2

93

VCC_MIX

8

IF1N

7

IF1P

6

24

23

OUTP

OUTN

20

19

OAP

OAN

18

OUT_OA

OA

VCC_BIAS

17

VEE_BIAS

22

MIX3

ENRX

BIAS

28

VCC_PLL

27

VEE_RO

25

IFA

RO

26

PFD

IF

CP

MIX2

IF

DIV_32

LF

29

VEE_MIX

5

IN_MIX1

4

OUT_LNA

GAIN_LNA

2

VEE_LNAC

1

LO

MIX1

LNA

IN_LNA

31

VCO1

VEE_LNA

30

VCC_LNA

32

Fig. 1: TH71111 block diagram

TH71111 Data Sheet Page 3 of 20 Nov. 2001 3901071111 Rev. 005

TH71111

868/915MHz

FSK/FM/ASK Receiver

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 inj ection 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 s purious 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 calc ulate 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

IF RF – LO LO – RF

RF image RF – 2IF RF + 2IF

32•REF 32•REF

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

REF / MHz LO / MHz RF image / MHz

The selection of the reference crystal frequency is based on some as sumptions. As for example: the image frequency should not be in a radio band where strong interfering signals might occur (bec ause they could represent parasitic receiving s ignals), the LO s ignal 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 rejec tion. The columns in bold depict the selected frequency plans to rec eive at

866.3 MHz and 915 MHz, respectively.

Low

26.80000

857.6

846.9

high

27.46875

879.0

889.7

low

28.25938

904.3

893.6

high

28.92813

925.7

936.4

TH71111 Data Sheet Page 4 of 20 Nov. 2001 3901071111 Rev. 005

TH71111

868/915MHz

FSK/FM/ASK Receiver

Pin Definition and Descripti on

Pin No. Name I/O Type Functional Schematic Description

3 OUT_LNA analog

output

31 IN_LNA analog

input

1 VEE_LNAC ground

2 GAIN_LNA analog

input

IN_LNA

31

GAIN_LNA

2

5k

400

Ω

OUT_LNA

3

VEE_LNAC

1

LNA open-collector output, to be connected to external LC tank that resonates at RF

LNA input, approx. 26Ω single-ended

ground of LNA core (cascode)

LNA gain control (CMOS input with hysteresis)

4 IN_MIX1 analog

input

IN_MIX1

4

Ω

13

Ω

13

500µA

MIX1 input, approx. 33Ω single-ended

5 VEE_MIX ground LNA biasing ground 6 IF1P analog I/O open-collector output, to be

IF1P

6

7 IF1N analog I/O

VEE

VCC

20p

2x500µA

20p

VEE

IF1N

connected to external LC tank that resonates at first IF

7

open-collector output, to be connected to external LC tank that resonates at first IF

8 VCC_MIX supply MIX1 and MIX2 positive

supply

9 OUT_MIX2 analog

output

OUT_MIX2

9

130

6.8k

Ω

230µA

MIX2 output, approx. 330Ω output impedance

10 VEE_IF ground ground for MIX2, IFA and

DEMOD

TH71111 Data Sheet Page 5 of 20 Nov. 2001 3901071111 Rev. 005

TH71111

868/915MHz

FSK/FM/ASK Receiver

Pin No. Name I/O Type Functional Schematic Description

11 IN_IFA analog

input

VCC

IN_IFA

VCC

IFA input, approx. 2.2kΩ input impedance

FBC1

12

IFA feedback capacitor

VEE

to be connected to external IFA feedback capacitor

positive supply for IFA,

11

VEE

FBC2

13

VCC

VEE

2.2k

200µA

VEE

12 FBC1 analog I/O to be connected to external

13 FBC2 analog I/O

14 VCC_IF supply

DEMOD

15 OUT_IFA analog I/O

IFA output and MIX3 input (of DEMOD)

OUT_IFA

15

40µA

16 IN_DEM analog

input

IN_DEM

16

47k

DEMOD input, to MIX3 core

17 VCC_BIAS supply

positive supply of general bias system and OA

18 OUT_OA analog

output

OUT_OA

Ω

50

OA output, 40uA current drive capability

18

19 OAN analog

input

20 OAP analog

input

OAN

19

20µA

Ω

50

Ω

50

negative OA input, input voltage limited to approx.

between pins OAP

pp

OAP

0.7 V and OAN

negative OA input, input

20

voltage limited to approx.

0.7 V

between pins OAP

pp

and OAN

TH71111 Data Sheet Page 6 of 20 Nov. 2001 3901071111 Rev. 005

TH71111

868/915MHz

FSK/FM/ASK Receiver

Pin No. Name I/O Type Functional Schematic Description

21 RSSI analog

output

RSSI

21

50

I (Pi)

Ω

36k

RSSI output, for RSSI and ASK detection, approx. 36kΩ output impedance

22 VEE_BIAS ground

ground for general bias system and OA

23 OUTP analog

output

24 OUTN analog

OUTP OUTN

23 24

Ω

50

20µA

FSK/FM positive output, output impedance of 100kΩ to 300kΩ

FSK/FM negative output, output impedance of 100kΩ to 300kΩ

25 VEE_RO ground ground of dividers, PFD and

RO

26 RO analog

input

RO 26

50k

30p

RO input, Colpitts type oscillator with internal feedback capacitors

27 VCC_PLL supply positive supply of RO, DIV,

PFD and charge pump

28 ENRX digital

input

ENRX

1.5k

mode control input (CMOS Input)

28

29 LF analog

output

LF 29

200

400

Ω

4p

charge pump output and VCO1 control input

30 VEE_LNA ground LNA biasing ground

32 VCC_LNA supply positive supply of LNA

biasing

TH71111 Data Sheet Page 7 of 20 Nov. 2001 3901071111 Rev. 005

Technical Data

Mode Configurations

ENRX Mode Description

0 SBY standby mode 1 ON entire chip active

Note: ENRX are pulled down internally

LNA Gain Control

TH71111

868/915MHz

FSK/FM/ASK Receiver

V

GAIN_LNA

Mode Description

< 0.8 V HIGH GAIN LNA set to high gain by voltage at GAIN_LNA > 1.4 V LOW GAIN LNA set to low gain by voltage at GAIN_LNA

Note: hysteresis between gain modes to ensure stability

Absolute Maximum Ratings

Parameter Symbol Condition / Note Min Max

Supply voltage V Input voltage V Input RF level P Storage temperature T

cc IN imax STG

Electrostatic discharge ESD

0 7.0 V

- 0.3 VCC+0.3 V no damage 10 dBm

-40 +125 °C human body model, MIL STD 833D method 3015.7, all pins except OUT_IFA pin OUT_IFA -500 +250 V

-500

+500

Unit

V

Normal Operating Conditions

Parameter Symbol Condition Min Max Unit

Supply voltage at 868 MHz V Supply voltage at 915 MHz V Operating temperature T

Input frequency f Frequency deviation FSK data rate R FM bandwidth f ASK data rate R

i

∆f

m

cc, 868 cc, 915 a

FSK

ASK

fi ≤ 900 MHz fi > 900 MHz 3.3 5.5 V

-40 +85 ºC 800 930 MHz at FM or FSK NRZ 40 kbit/s

NRZ 80 kbit/s

2.5 5.5 V

±5 ±120

kHz

15 kHz

TH71111 Data Sheet Page 8 of 20 Nov. 2001 3901071111 Rev. 005

DC Characteristics

all parameters under normal operating conditions, unless otherwise stated; typical values at T

= 23 °C and V

a

cc

= 3 V

Parameter Symbol Condition Min Typ Max Unit

Standby current I Total supply current at low gain I

SBY cc, low

ENRX=0 100 nA ENRX=1, LNA at LOW GAIN

Total supply current at high gain I

cc, high

ENRX=1,

LNA at HIGH GAIN Opamp input offset voltage V Opamp input offset current I Opamp input bias current I RSSI voltage at low input level V

offs offs bias

RSSI, low

I

– I

OAP

OAN

0.5 * (I

OAP

+ I

Pi = -65 dBm,

) -100 100 nA

OAN

LNA at LOW GAIN

RSSI voltage at high input level V

RSSI, high

Pi = -35 dBm, LNA at LOW GAIN

TH71111

868/915MHz

FSK/FM/ASK Receiver

6.0 7.5 9.0 mA

7.5 9.2 11.0 mA

-20 20 mV

-50 50 nA

0.5 1.0 1.5 V

1.25 1.9 2.45 V

AC System Characteristics

all parameters under normal operating conditions, unless otherwise stated; all parameters based on test circuits for FSK (Fig. 2), FM (Fig. 4) and ASK (Fig. 5), respectively; typical values at T

= 23 °C and V

a

= 3 V, RF at 866.3 MHz, second IF at 10.7 MHz

cc

Parameter Symbol Condition Min Typ Max Unit

start-up time – FSK/FM T

FSK

ENRX from 0 to 1,

0.9 ms

valid data at output

start-up time – ASK T

ASK

depends on ASK

R3•C12

detector time constant,

input sensitivity – FSK (narrow band)

input sensitivity – FSK (wide band)

input sensitivity – ASK (narrow band)

input sensitivity – ASK (wide band)

maximum input signal – FSK/FM P maximum input signal – ASK P

P

min, n

P

min, w

P

minA, n

P

minA, w

max, FM

max, ASK

valid data at output B

= 40kHz

IF2

∆f = ±15kHz (FSK/FM) BER ≤ 3⋅10 B

= 150kHz

IF2

∆f = ±50kHz (FSK/FM) BER ≤ 3⋅10 B

= 40kHz

IF2

BER ≤ 3⋅10 B

= 150kHz

IF2

BER ≤ 3⋅10 BER ≤ 3⋅10

LNA at LOW GAIN BER ≤ 3⋅10

-3

-109 dBm

-102 dBm

-108 dBm

-104 dBm 0dBm

-10 dBm

T

LNA at LOW GAIN spurious emission P image rejection blocking immunity

VCO gain K Charge pump current I

∆P ∆P

CP

spur

imag block

VCO

∆f

> ±2MHz, note 1

block

55 dB 57 dB

250 MHz/V

60 µA

-70 dBm

Notes: 1. desired signal with FSK/FM or ASK modulation, CW blocking signal

ms

+

FSK

TH71111 Data Sheet Page 9 of 20 Nov. 2001 3901071111 Rev. 005

Test Circuits

FSK Reception

TH71111

868/915MHz

FSK/FM/ASK Receiver

L2

XT AL

R1

C5

VCC

C1

C3

VCC

VEE

VCC

C14

OUTN

RO

VCC

ENRX

LF

VEE

IN_LNA

VEE

OUTP

GAIN_LNA

C16C15

VEE

RSSI

LQFP32

IN_MIX1

OUT_LNA

OAP

VEE

OAN

IF1P

VCC

IN_DEM

OUT_OA

OUT_IFA

VCC

FBC2

FBC1

IN_IFA

VEE

VCC

IF1N

VCC

OUT_MIX2

C13

C12

CP

CERRES

VCC

C11

C9

C10

CERFIL

C7

C6

RL2

CB*

VCC

L1

SAWFIL

C4

L3

Fig. 2: Test circuit for FSK reception

TH71111 Data Sheet Page 10 of 20 Nov. 2001 3901071111 Rev. 005

FSK/FM/ASK Receiver

FSK test circuit component list to Fig. 2

Part Size Value / Type Tolerance Description

C1 0805 15 pF C3 0805 1 nF C4 0603 4.7 pF C5 0603 2.7 pF C6 0603 NIP C7 0603 1.2 pF

C9 0805 33 nF C10 0603 1 nF C11 0603 1 nF C12 0603 1.5 pF C13 0603 680 pF

CP 0805 10 -12 pF C14 0805 10 – 47 pF

C15 0805 10 – 47 pF

C16 0603 330 pF

R1 0805 RL1 RL2

L1 0603 12 nH L2 0603 12 nH L3 0603 6.8 nH

XTAL HC49

SAWFIL QCC8C

CERFIL

CERRES SMD type CDACV10.7MG18-A

0805 0805

SMD

leaded

type

SMD type SFECV10.7MJS-A

10 kΩ±10% 470 Ω 470 Ω

26.8000 MHz

@ RF = 868.3 MHz

B3570

@ RF = 868.3 MHz

SFE10.7MFP @

= 40 kHz

B

IF2

= 150 kHz

@ B

IF2

NIP – not in place, may be used optionally

±10% ±10%

±5% ±5% ±5%

±5% ±10% ±10% ±10%

±5% ±10%

±5%

±10%

±5%

±25ppm calibra-

tion

±30ppm temp.

B

= 1.7 MHz

3dB

TBD

±40 kHz

crystal series capacitor loop filter capacitor capacitor to match to SAW filter input capacitor to match to SAW filter output LNA output tank capacitor MIX1 input matching capacitor IFA feedback capacitor IFA feedback capacitor IFA feedback capacitor DEMOD phase-shift capacitor DEMOD coupling capacitor CERRES parallel capacitor demodulator output low-pass capacitor, depending on

data rate demodulator output low-pass capacitor, depending on

data rate RSSI output low-pass capacitor loop filter resistor MIX1 bias resistor MIX1 bias resistor inductor to match SAW filter inductor to match SAW filter LNA output tank inductor fundamental-mode crystal, C

C

0, max

= 7 pF, R

m, max

= 50 Ω

low-loss SAW filter from EPCOS

ceramic filter from Murata

ceramic demodulator tank from Murata

TH71111

868/915MHz

= 10 pF to 15pF,

load

TH71111 Data Sheet Page 11 of 20 Nov. 2001 3901071111 Rev. 005

FSK Circuit with AFC and Ceramic Resonator Tolerance Compensation

TH71111

868/915MHz

FSK/FM/ASK Receiver

L2

XTAL

R1

C5

VCC

C1

C3

VCC

VEE

VCC

C14

OUTN

RO

VCC

ENRX

LF

VEE

IN_LNA

VEE

R4

OUTP

GAIN_LNA

C16C15

R5

VEE

RSSI

LQFP32

IN_MIX1

OUT_LNA

C17

OAP

VEE

C18

OAN

IF1P

VCC

IN_DEM

OUT_OA

OUT_IFA

VCC

FBC2

FBC1

IN_IFA

VEE

VCC

IF1N

R3

VCC

OUT_MIX2

C13

C12

CP VD

CERRES

VCC

C11

C9

C10

CERFIL

SAWFIL

L1

C4

L3

C7

C6

RL1

RL2

CB*

VCC

Fig. 3: Test circuit for FSK with AFC and resonator compensation

Circuit Feature

! Improves input frequency acceptance range up to RF

±50 kHz

nom

! Eliminates calibration tolerances of ceramic resonator ! Eliminates temperature tolerances of ceramic resonator ! Non-inverted and inverted CMOS-compatible outputs

TH71111 Data Sheet Page 12 of 20 Nov. 2001 3901071111 Rev. 005

FSK/FM/ASK Receiver

FSK test circuit with AFC component list to Fig. 3

Part Size Value / Type Tolerance Description

C1 0805 15 pF C3 0805 1 nF C4 0603 4.7 pF C5 0603 2.7 pF C6 0603 4.7 pF C7 0603 2.2 pF

C9 0805 33 nF C10 0603 1 nF C11 0603 1 nF C12 0603 1.5 pF C13 0603 680 pF

CP 0805 27 pF C14 0805 10 – 47 pF

C15 0805 10 – 47 pF

C16 0603 330 pF C17 33 nF C18 0805

R1 0805

R3

R4

R5 RL1 RL2

L1 0603 33 nH L2 0603 33 nH L3 0603 15 nH

VD SOD-323 BB535

XTAL HC49

SAWFIL QCC8C

CERFIL

CERRES SMD type CDACV10.7MG18-A

0805 0805 0805 0805 0805

SMD

leaded

type

SMD type SFECV10.7MJS-A

33 nF 10 nF

1 nF

10 kΩ±10% 100 kΩ 680 kΩ±10% 680 kΩ±10%

470 Ω

26.8000 MHz

@ RF = 868.3 MHz

B3570

@ RF = 868.3 MHz

SFE10.7MFP @

= 40 kHz

B

IF2

= 150 kHz

@ B

IF2

NIP – not in place, may be used optionally

±10% ±10%

±5% ±5% ±5%

±5% ±10% ±10% ±10%

±5% ±10%

±5%

±10% ±10% ±10%

±10%

±5%

±25ppm calibra-

tion

±30ppm temp.

B

= 1.7 MHz

3dB

TBD

±40 kHz

crystal series capacitor loop filter capacitor capacitor to match to SAW filter input capacitor to match to SAW filter output LNA output tank capacitor MIX1 input matching capacitor IFA feedback capacitor IFA feedback capacitor IFA feedback capacitor DEMOD phase-shift capacitor DEMOD coupling capacitor ceramic resonator loading capacitor demodulator output low-pass capacitor, depending on

data rate demodulator output low-pass capacitor, depending on

data rate RSSI output low-pass capacitor integrator capacitor, fixed integrator capacitor, @ 0.5 to 2 kbit/s NRZ integrator capacitor, @ 2 to 20 kbit/s NRZ integrator capacitor, @ 20 to 40 kbit/s NRZ loop filter resistor varactor diode biasing resistor integrator resistor integrator resistor MIX1 bias resistor MIX1 bias resistor inductor to match SAW filter inductor to match SAW filter LNA output tank inductor varactor diode from Infineon fundamental-mode crystal, C

C

0, max

= 7 pF, R

m, max

= 50 Ω

low-loss SAW filter from EPCOS

ceramic filter from Murata

ceramic demodulator tank from Murata

TH71111

868/915MHz

= 10 pF to 15pF,

load

TH71111 Data Sheet Page 13 of 20 Nov. 2001 3901071111 Rev. 005

FM Reception

TH71111

868/915MHz

FSK/FM/ASK Receiver

L2

XT AL

R1

C5

VCC

C1

C3

VCC

VEE

VCC

OUTN

RO

VCC

ENRX

LF

VEE

IN_LNA

VEE

OUTP

GAIN_LNA

C16

R6

C15

VEE

RSSI

LQFP32

IN_MIX1

OUT_LNA

R5

C14

R4

OAP

VEE

OAN

IF1P

R3

VCC

IN_DEM

OUT_OA

OUT_IFA

VCC

FBC2

FBC1

IN_IFA

VEE

VCC

IF1N

VCC

OUT_MIX2

C13

C12

CP

CERRES

VCC

C11

C9

C10

CERFIL

C7

C6

RL1

RL2

CB*

VCC

L1

SAWFIL

C4

L3

Fig. 4: Test circuit for FM reception

TH71111 Data Sheet Page 14 of 20 Nov. 2001 3901071111 Rev. 005

FSK/FM/ASK Receiver

FM test circuit component list to Fig. 4

Part Size Value / Type Tolerance Description

C1 0805 15 pF C3 0805 1 nF C4 0603 4.7 pF C5 0603 2.7 pF C6 0603 4.7 pF C7 0603 2.2 pF

C9 0805 33 nF C10 0603 1 nF C11 0603 1 nF C12 0603 1.5 pF C13 0603 680 pF

CP 0805 10 -12 pF C14 0805 100 pF

C15 0805 100 pF

C16 0603 330 pF

R1 0805

R3 0805

R4 0805

R5 0805

R6 0805 RL1 RL2

L1 0603 33 nH L2 0603 33 nH L3 0603 15 nH

XTAL HC49

SAWFIL QCC8C

CERFIL

CERRES SMD type CDACV10.7MG18-A

0805 0805

SMD

leaded

type

SMD type SFECV10.7MJS-A

10 kΩ±10% 12 kΩ±5%

6.8 kΩ±5% 33 kΩ±5% 33 kΩ±5% 470 Ω 470 Ω

26.8000 MHz

@ RF = 868.3 MHz

B3570

@ RF = 868.3 MHz

SFE10.7MFP @

= 40 kHz

B

IF2

= 150 kHz

@ B

IF2

NIP – not in place, may be used optionally

±10% ±10%

±5% ±5% ±5%

±5% ±10% ±10% ±10%

±5% ±10%

±5%

±10%

±5%

±25ppm calibra-

tion

±30ppm temp.

B

= 1.7 MHz

3dB

TBD

±40 kHz

crystal series capacitor loop filter capacitor capacitor to match to SAW filter input capacitor to match to SAW filter output LNA output tank capacitor MIX1 input matching capacitor IFA feedback capacitor IFA feedback capacitor IFA feedback capacitor DEMOD phase-shift capacitor DEMOD coupling capacitor CERRES parallel capacitor sallen-Key low-pass filter capacitor, to set cut-off fre-

quency sallen-Key low-pass filter capacitor, to set cut-off fre-

quency RSSI output low-pass capacitor loop filter resistor 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 MIX1 bias resistor inductor to match SAW filter inductor to match SAW filter LNA output tank inductor fundamental-mode crystal, C

C

0, max

= 7 pF, R

m, max

= 50 Ω

low-loss SAW filter from EPCOS

ceramic filter from Murata

ceramic demodulator tank from Murata

TH71111

868/915MHz

= 10 pF to 15pF,

load

TH71111 Data Sheet Page 15 of 20 Nov. 2001 3901071111 Rev. 005

ASK Reception

TH71111

868/915MHz

FSK/FM/ASK Receiver

R3

C13

L2

C12

VEE

XT AL

C1

VCC

C3

R1

VCC

C5

VCC

SAWFIL

OUTN

RO

VCC

ENRX

LF

VEE

IN_LNA

VEE

OUTP

RSSI

OAN

OAP

LQFP32

VEE

OUT_LNA

IN_MIX1

C7

GAIN_LNA

IF1P

VCC

IN_DEM

OUT_OA

OUT_IFA

VCC

FBC2

FBC1

IN_IFA

VEE

VCC

IF1N

VCC

C11

C9

C10

CERFIL

OUT_MIX2

L1

C4

L3

C6

RL1

RL2

CB*

VCC

Fig. 5: Test circuit for ASK reception

TH71111 Data Sheet Page 16 of 20 Nov. 2001 3901071111 Rev. 005

FSK/FM/ASK Receiver

ASK test circuit component list to Fig. 5

Part Size Value / Type Tolerance Description

C1 0805 15 pF C3 0805 1 nF C4 0603 4.7 pF C5 0603 2.7 pF C6 0603 4.7 pF C7 0603 2.2 pF

C9 0805 33 nF C10 0603 1 nF C11 0603 1 nF C12 0805 1 nF to 10 nF C13 0603 330 pF

R1 0805

R3 0603 RL1 RL2

L1 0603 33 nH L2 0603 33 nH L3 0603 15 nH L4 0603 100 nH L5 0603 100 nH

XTAL HC49

SAWFIL QCC8C

CERFIL

0805 0805

SMD

leaded

type

SMD type SFECV10.7MJS-A

10 kΩ±10%

100 kΩ±5%

470 Ω 470 Ω

26.8000 MHz

@ RF = 868.3 MHz

B3570

@ RF = 868.3 MHz

SFE10.7MFP @

= 40 kHz

B

IF2

= 150 kHz

@ B

IF2

NIP – not in place, may be used optionally

±10% ±10%

±5% ±5% ±5%

±5% ±10% ±10% ±10% ±10% ±10%

±5%

±25ppm calibra-

tion

±30ppm temp.

B

= 1.7 MHz

3dB

TBD

±40 kHz

crystal series capacitor loop filter capacitor capacitor to match to SAW filter input capacitor to match to SAW filter output LNA output tank capacitor MIX1 input matching capacitor IFA feedback capacitor IFA feedback capacitor IFA feedback capacitor ASK data slicer capacitor, depending on data rate RSSI output low-pass capacitor loop filter resistor ASK data slicer resistor, depending on data rate MIX1 bias resistor MIX1 bias resistor inductor to match SAW filter inductor to match SAW filter LNA output tank inductor IF1 tank inductor IF1 tank inductor fundamental-mode crystal, C

C

0, max

= 7 pF, R

m, max

= 50 Ω

low-loss SAW filter from EPCOS

ceramic filter from Murata

TH71111

868/915MHz

= 10 pF to 15pF,

load

TH71111 Data Sheet Page 17 of 20 Nov. 2001 3901071111 Rev. 005

Package Dimensions

TH71111

868/915MHz

FSK/FM/ASK Receiver

D

D1

1724

b

25

16

E

E1

32

1

A1A2A

8

L

e

9

Fig. 6: LQFP32 (Low Quad Flat Package)

All Dimension in mm, coplanaríty < 0.1mm

E1, D1 A A1 A2 e b L E, D

min 0.05 1.35 0.30 0.45 0°

7.00 0.8 9.00

max 1.60 0.15 1.45 0.45 0.75 7°

All Dimension in inch, coplanaríty < 0.004”

min 0.002 0.053 0.012 0.018 0°

0.276 0.031 0.354

max 0.630 0.006 0.057 0.018 0.030 7°

αααα

TH71111 Data Sheet Page 18 of 20 Nov. 2001 3901071111 Rev. 005

Your Notes

TH71111

868/915MHz

FSK/FM/ASK Receiver

TH71111 Data Sheet Page 19 of 20 Nov. 2001 3901071111 Rev. 005

Your Notes

TH71111

868/915MHz

FSK/FM/ASK Receiver

Important Notice

Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sal e. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devi ces 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 com mercial applications. Applications requi ring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life- support or life-sustaining equi pment 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. © 2000 Melexis GmbH. All rights reserved.

For the latest version of thi s document. Go to our website at

www.melexis.com

Or for additional informat i on contact Melexis Direct:

Europe and Japan: All other locations:

E-mail: [email protected] E-mail: [email protected]

Phone: +32 1361 1631 Phone: +1 603 223 2362

QS9000, VDA6.1 and ISO14001 Certified

TH71111 Data Sheet Page 20 of 20 Nov. 2001 3901071111 Rev. 005