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| TH71101 315/433MHz 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. TH71101 Temperature Range -40 C to 85C Package LQFP32 Application Examples ! ! ! ! ! General digital and analog 315 MHz or 433 MHz ISM band usage Low-power telemetry Alarm and security systems Keyless car and central locking Pagers Technical Data Overview ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Input frequency range: 300 MHz to 450 MHz Power supply range: 2.5 V to 5.5 V at 315 MHz and 2.7 V to 5.5 V at 433 MHz Temperature range: -40 C to +85 C Operating current: 6.5 mA at low gain and 8.2 mA at high gain mode Standby current: < 100 nA 1) with 40 kHz IF filter BW (incl. SAW front-end filter loss) Sensitivity: -111 dBm 2) Sensitivity: -104 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 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) 2) at 8 kHz FSK deviation, BER = 310 and phase-coincidence demodulation -3 at 50 kHz FSK deviation, BER = 310 and phase-coincidence demodulation -3 TH71101 Data Sheet 3901071101 Page 1 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver General Description The TH71101 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_16, 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 TH71101 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 FM / FSK FM / FSK ASK Type of receiver narrow-band RX with ceramic demodulation tank wide-band RX with LC demodulation tank RX with RSSI-based demodulation A double-conversion variant, called TH71102, 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 TH71102, the second mixer (MIX2) is used to down-convert the first IF (IF1) to the second IF (IF2). At the TH71101, 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. TH71101 Data Sheet 3901071101 Page 2 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Block Diagram OUTP OUTN OAN OAP 23 24 20 OA OUT_OA 19 18 VCC_BIAS VEE_BIAS MIX3 IN_DEM 16 22 17 BIAS ENRX 28 OUT_IFA 15 VCC_PLL 14 21 IFA 13 FBC1 12 VEE_IF 10 CP OUT_MIX2 9 IF PFD IN_IFA 11 DIV_16 IF1N 7 IF1P 6 IF MIX2 VCC_MIX 8 IN_MIX1 4 OUT_LNA 3 MIX1 VEE_MIX 5 LO VCO1 VEE_LNA LNA GAIN_LNA 2 VCC_LNA 32 IN_LNA VEE_LNAC 1 Fig. 1: TH71101 block diagram TH71101 Data Sheet 3901071101 31 Page 3 of 20 30 29 LF 26 RO FPC2 RO 25 RSSI VEE_RO 27 Nov. 2001 Rev. 005 TH71101 315/433MHz 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 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 TH71101 with the fixed feedback divider ratio of N = 16 (DIV_16), 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 REF LO IF RF image low (RF - IF)/16 16*REF RF - LO RF - 2IF high (RF + IF)/16 16*REF LO - RF RF + 2IF The following table depicts crystal, LO and image signals considering the examples of 315 MHz and 433.6 MHz RF reception at IF = 10.7 MHz. Signal type Injection type REF / MHz LO / MHz RF image / MHz RF = 315 MHz low 19.01875 304.3 293.6 RF = 315 MHz high 20.35625 325.7 336.4 RF = 433.6 MHz low 26.43125 422.9 412.2 RF = 433.6 MHz high 27.76875 444.3 455.0 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 300 MHz to 430 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 315 MHz and 433.6 MHz, respectively. TH71101 Data Sheet 3901071101 Page 4 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Pin Definition and Description Pin No. 3 Name OUT_LNA I/O Type analog output analog input ground 5k Functional Schematic OUT_LNA 3 Description LNA open-collector output, to be connected to external LC tank that resonates at RF LNA input, approx. 26 single-ended 31 1 IN_LNA VEE_LNAC IN_LNA 31 VEE_LNAC 1 ground of LNA core (cascode) LNA gain control (CMOS input with hysteresis) 2 GAIN_LNA analog input GAIN_LNA 2 400 4 IN_MIX1 analog input IN_MIX1 4 13 MIX1 input, approx. 33 single-ended 13 500A 5 6 VEE_MIX IF1P ground analog I/O IF1P 20p VCC 20p LNA biasing ground IF1N 7 open-collector output, to be connected to external LC tank that resonates at first IF open-collector output, to be connected to external LC tank that resonates at first IF 7 IF1N analog I/O 6 2x500A VEE VEE 8 9 VCC_MIX OUT_MIX2 supply analog output OUT_MIX2 9 230A 130 MIX1 and MIX2 positive supply 6.8k MIX2 output, approx. 330 output impedance 10 VEE_IF ground ground for MIX2, IFA and DEMOD TH71101 Data Sheet 3901071101 Page 5 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Pin No. 11 Name IN_IFA I/O Type analog input IN_IFA 11 VEE VCC Functional Schematic VCC VCC Description IFA input, approx. 2.2k input impedance FBC1 12 12 FBC1 analog I/O 2.2k 2.2k 200A VEE to be connected to external IFA feedback capacitor 13 FBC2 analog I/O FBC2 13 VEE VEE to be connected to external IFA feedback capacitor 14 15 VCC_IF OUT_IFA supply analog I/O OUT_IFA 15 40A positive supply for IFA, DEMOD IFA output and MIX3 input (of DEMOD) 16 IN_DEM analog input IN_DEM 16 DEMOD input, to MIX3 core 47k 17 18 VCC_BIAS OUT_OA supply analog output OUT_OA 18 50 positive supply of general bias system and OA OA output, 40uA current drive capability 19 OAN analog input OAN 50 20A 50 20 OAP analog input 19 negative OA input, input voltage limited to approx. 0.7 Vpp between pins OAP and OAN OAP negative OA input, input 20 voltage limited to approx. 0.7 Vpp between pins OAP and OAN TH71101 Data Sheet 3901071101 Page 6 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Pin No. 21 Name RSSI I/O Type analog output Functional Schematic Description RSSI output, for RSSI and ASK detection, approx. 36k output impedance RSSI 21 I (Pi) 50 36k 22 23 VEE_BIAS OUTP ground analog output analog ground for general bias system and OA OUTP OUTN 23 24 50 FSK/FM positive output, output impedance of 100k to 300k 20A 20A 24 OUTN FSK/FM negative output, output impedance of 100k to 300k ground of dividers, PFD and RO RO input, Colpitts type oscillator with internal feedback capacitors 25 26 VEE_RO RO ground analog input RO 26 30p 50k 30p 27 28 VCC_PLL ENRX supply digital input ENRX 28 1.5k positive supply of RO, DIV, PFD and charge pump mode control input (CMOS Input) 29 LF analog output LF 29 400 200 charge pump output and VCO1 control input 4p 30 32 VEE_LNA VCC_LNA ground supply LNA biasing ground positive supply of LNA biasing TH71101 Data Sheet 3901071101 Page 7 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Technical Data Mode Configurations ENRX Mode standby mode entire chip active Description 0 SBY 1 ON Note: ENRX are pulled down internally LNA Gain Control VGAIN_LNA < 0.8 V > 1.4 V Mode HIGH GAIN LOW GAIN Description LNA set to high gain by voltage at GAIN_LNA LNA set to low gain by voltage at GAIN_LNA Note: hysteresis between gain modes to ensure stability Absolute Maximum Ratings Parameter Supply voltage Input voltage Input RF level Storage temperature Electrostatic discharge Symbol Vcc VIN Pimax TSTG ESD Condition / Note Min 0 - 0.3 no damage -40 human body model, MIL STD 833D method 3015.7, all pins except OUT_IFA pin OUT_IFA Max 7.0 VCC+0.3 10 +125 Unit V V dBm C -500 -500 +500 +250 V V Normal Operating Conditions Parameter Supply voltage at 315 MHz Supply voltage at 433 MHz Operating temperature Input frequency Frequency deviation FSK data rate FM bandwidth ASK data rate Symbol Vcc, 315 Vcc, 433 Ta fi f RFSK fm RASK Condition fi 400 MHz fi > 400 MHz Min 2.5 2.7 -40 300 5 Max 5.5 5.5 +85 450 120 40 15 80 Unit V V C MHz kHz kbit/s kHz kbit/s at FM or FSK NRZ NRZ TH71101 Data Sheet 3901071101 Page 8 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver DC Characteristics all parameters under normal operating conditions, unless otherwise stated; typical values at Ta = 23 C and Vcc = 3 V Parameter Standby current Total supply current at low gain Total supply current at high gain Opamp input offset voltage Opamp input offset current Opamp input bias current RSSI voltage at low input level RSSI voltage at high input level Symbol ISBY Icc, low Icc, high Voffs Ioffs Ibias VRSSI, low VRSSI, high Condition ENRX=0 ENRX=1, LNA at LOW GAIN ENRX=1, LNA at HIGH GAIN IOAP - IOAN 0.5 * (IOAP + IOAN) Pi = -65 dBm, LNA at LOW GAIN Pi = -35 dBm, LNA at LOW GAIN Min 5.0 6.5 -20 -50 -100 0.5 1.25 Typ 6.5 8.2 Max 100 8.0 10.0 20 50 100 1.5 2.45 Unit nA mA mA mV nA nA V V 1.0 1.9 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 Ta = 23 C and Vcc = 3 V, RF at 433.6 MHz, second IF at 10.7 MHz Parameter start-up time - FSK/FM start-up time - ASK Symbol TFSK TASK Condition ENRX from 0 to 1, valid data at output depends on ASK detector time constant, valid data at output BIF2 = 40kHz f = 15kHz (FSK/FM) -3 BER 310 BIF2 = 150kHz f = 50kHz (FSK/FM) -3 BER 310 BIF2 = 40kHz -3 BER 310 BIF2 = 150kHz -3 BER 310 -3 BER 310 LNA at LOW GAIN -3 BER 310 LNA at LOW GAIN Min Typ Max 0.9 R3*C12 + TFSK -111 Unit ms ms input sensitivity - FSK (narrow band) input sensitivity - FSK (wide band) Pmin, n dBm Pmin, w -104 dBm input sensitivity - ASK PminA, n (narrow band) input sensitivity - ASK PminA, w (wide band) maximum input signal - FSK/FM Pmax, FM maximum input signal - ASK spurious emission image rejection blocking immunity VCO gain Charge pump current Pmax, ASK Pspur Pimag Pblock KVCO ICP -109 -106 0 -10 -70 dBm dBm dBm dBm dBm dB dB MHz/V A fblock > 2MHz, note 1 55 57 250 60 Notes: 1. desired signal with FSK/FM or ASK modulation, CW blocking signal TH71101 Data Sheet 3901071101 Page 9 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Test Circuits FSK Reception C14 C15 C16 VCC VCC CP C13 RSSI OUTN OUTP OAP OAN VEE VEE OUT_OA XTAL IN_DEM C12 VCC C1 RO OUT_IFA VCC FBC2 CERRES VCC VCC ENRX C11 R1 C3 LF VEE GAIN_LNA OUT_LNA IN_LNA FBC1 C9 LQFP32 IN_MIX1 C10 IN_IFA VEE IF1N IF1P L2 SAWFIL VCC VEE VEE VCC C5 VCC CERFIL OUT_MIX2 C7 L3 RL2 CB* VCC L1 C4 C6 Fig. 2: Test circuit for FSK reception TH71101 Data Sheet 3901071101 Page 10 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver FSK test circuit component list to Fig. 2 Part C1 C3 C4 C5 C6 C7 C9 C10 C11 C12 C13 CP C14 C15 C16 R1 RL1 RL2 L1 L2 L3 XTAL Size 0805 0805 0603 0603 0603 0603 0805 0603 0603 0603 0603 0805 0805 0805 0603 0805 0805 0805 0603 0603 0603 HC49 SMD QCC8C Value / Type 15 pF 1 nF 3.3 pF 3.3 pF 4.7 pf 2.2 pf 33 nF 1 nF 1 nF 1.5 pF 680 pF 10 - 12 pF 10 - 47 pF 10 - 47 pF 330 pF 10 k 470 470 33 nH 33 nH 15 nH 26.43125 MHz @ RF = 433.6 MHz B3555 @ RF = 433.6 MHz SFE10.7MFP @ BIF2 = 40 kHz SFECV10.7MJS-A @ BIF2 = 150 kHz CDACV10.7MG18-A Tolerance 10% 10% 5% 5% 5% 5% 10% 10% 10% 5% 10% 5% 5% 5% 10% 10% 5% 5% 5% 5% 5% Description 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, Cload = 10 pF to 15pF, C0, max = 7 pF, Rm, max = 50 SAWFIL CERFIL Leaded type SMD type 25ppm calibration 30ppm temp. B3dB = 860 kHz low-loss SAW filter from EPCOS 100 kHz (f0 = 433.92 MHz) TBD ceramic filter from Murata 40 kHz CERRES SMD type ceramic demodulator tank from Murata NIP - not in place, may be used optionally TH71101 Data Sheet 3901071101 Page 11 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver FSK Circuit with AFC and Ceramic Resonator Tolerance Compensation C14 C15 R4 R5 C16 C17 C18 VCC R3 VCC CP C13 VD RSSI OUTN OUTP OAP OAN VEE VEE XTAL C1 RO VCC OUT_OA IN_DEM C12 VCC OUT_IFA VCC FBC2 CERRES VCC ENRX C11 R1 C3 LF VEE GAIN_LNA OUT_LNA IN_LNA L2 SAWFIL VEE C5 VCC C9 FBC1 LQFP32 IN_MIX1 C10 IN_IFA VEE IF1N IF1P VCC VEE VCC CERFIL OUT_MIX2 C7 RL1 RL2 CB* VCC L1 C4 L3 C6 Fig. 3: Test circuit for FSK with AFC and resonator compensation Circuit Feature ! ! ! ! Improves input frequency acceptance range up to RFnom 50 kHz Eliminates calibration tolerances of ceramic resonator Eliminates temperature tolerances of ceramic resonator Non-inverted and inverted CMOS-compatible outputs TH71101 Data Sheet 3901071101 Page 12 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver FSK test circuit with AFC component list to Fig. 3 Part C1 C3 C4 C5 C6 C7 C9 C10 C11 C12 C13 CP C14 C15 C16 C17 C18 0805 Size 0805 0805 0603 0603 0603 0603 0805 0603 0603 0603 0603 0805 0805 0805 0603 Value / Type 15 pF 1 nF 3.3 pF 3.3 pF 4.7 pF 2.2 pF 33 nF 1 nF 1 nF 1.5 pF 680 pF 27 pF 10 - 47 pF 10 - 47 pF 330 pF 33 nF 33 nF 10 nF 1 nF 10 k 100 k 680 k 680 k 470 470 33 nH 33 nH 15 nH BB535 26.43125 MHz @ RF = 433.6 MHz B3555 @ RF = 433.6 MHz SFE10.7MFP @ BIF2 = 40 kHz SFECV10.7MJS-A @ BIF2 = 150 kHz CDACV10.7MG18-A Tolerance 10% 10% 5% 5% 5% 5% 10% 10% 10% 5% 10% 5% 5% 5% 10% 10% 10% Description 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, Cload = 10 pF to 15pF, C0, max = 7 pF, Rm, max = 50 R1 R3 R4 R5 RL1 RL2 L1 L2 L3 VD XTAL 0805 0805 0805 0805 0805 0805 0603 0603 0603 SOD-323 HC49 SMD QCC8C 10% 10% 10% 10% 5% 5% 5% 5% 5% SAWFIL CERFIL Leaded type SMD type 25ppm calibration 30ppm temp. B3dB = 860 kHz low-loss SAW filter from EPCOS 100 kHz (f0 = 433.92 MHz) TBD ceramic filter from Murata 40 kHz CERRES SMD type ceramic demodulator tank from Murata NIP - not in place, may be used optionally TH71101 Data Sheet 3901071101 Page 13 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver FM Reception R6 C14 R5 C16 C15 R4 R3 VCC VCC CP C13 OUTN RSSI VEE OUTP OAP OAN VEE OUT_OA XTAL IN_DEM C12 VCC C1 RO OUT_IFA VCC FBC2 CERRES VCC VCC ENRX C11 R1 C3 LF VEE GAIN_LNA OUT_LNA IN_LNA VEE FBC1 C9 LQFP32 IN_MIX1 C10 IN_IFA VEE IF1N IF1P L2 SAWFIL VCC VEE VCC C5 VCC CERFIL OUT_MIX2 C7 RL1 RL2 CB* VCC L1 C4 L3 C6 Fig. 4: Test circuit for FM reception TH71101 Data Sheet 3901071101 Page 14 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver FM test circuit component list to Fig. 4 Part C1 C3 C4 C5 C6 C7 C9 C10 C11 C12 C13 CP C14 C15 C16 R1 R3 R4 R5 R6 RL1 RL2 L1 L2 L3 XTAL Size 0805 0805 0603 0603 0603 0603 0805 0603 0603 0603 0603 0805 0805 0805 0603 0805 0805 0805 0805 0805 0805 0805 0603 0603 0603 HC49 SMD QCC8C Value / Type 15 pF 1 nF 3.3 pF 3.3 pF 4.7 pF 2.2 pF 33 nF 1 nF 1 nF 1.5 pF 680 pF 10 - 12 pF 100 pF 100 pF 330 pF 10 k 12 k 6.8 k 33 k 33 k 470 470 33 nH 33 nH 15 nH 26.43125 MHz @ RF = 433.6 MHz B3555 @ RF = 433.6 MHz SFE10.7MFP @ BIF2 = 40 kHz SFECV10.7MJS-A @ BIF2 = 150 kHz CDACV10.7MG18-A Tolerance 10% 10% 5% 5% 5% 5% 10% 10% 10% 5% 10% 5% 5% 5% 10% 10% 5% 5% 5% 5% 5% 5% 5% 5% 5% Description 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 frequency sallen-Key low-pass filter capacitor, to set cut-off frequency 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, Cload = 10 pF to 15pF, C0, max = 7 pF, Rm, max = 50 SAWFIL CERFIL leaded type SMD type 25ppm calibration 30ppm temp. B3dB = 860 kHz low-loss SAW filter from EPCOS 100 kHz (f0 = 433.92 MHz) TBD ceramic filter from Murata 40 kHz CERRES SMD type ceramic demodulator tank from Murata NIP - not in place, may be used optionally TH71101 Data Sheet 3901071101 Page 15 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver ASK Reception R3 C13 VCC OUTN RSSI OUTP OAP OAN VEE VEE OUT_OA XTAL RO IN_DEM OUT_IFA VCC FBC2 VCC C1 VCC VCC ENRX VCC C12 C11 R1 C3 LF VEE GAIN_LNA OUT_LNA IN_LNA FBC1 C9 LQFP32 IN_MIX1 C10 IN_IFA VEE IF1N IF1P L2 SAWFIL VCC VEE VEE VCC C5 VCC CERFIL OUT_MIX2 C7 L3 C6 RL1 RL2 CB* VCC L1 C4 Fig. 5: Test circuit for ASK reception TH71101 Data Sheet 3901071101 Page 16 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver ASK test circuit component list to Fig. 5 Part C1 C3 C4 C5 C6 C7 C9 C10 C11 C12 C13 R1 R3 RL1 RL2 L1 L2 L3 XTAL Size 0805 0805 0603 0603 0603 0603 0805 0603 0603 0805 0603 0805 0603 0805 0805 0603 0603 0603 HC49 SMD QCC8C Value / Type 15 pF 1 nF 3.3 pF 3.3 pF 4.7 pF 2.2 pF 33 nF 1 nF 1 nF 1 nF to 10 nF 330 pF 10 k 100 k 470 470 33 nH 33 nH 15 nH 26.43125 MHz @ RF = 433.6 MHz B3555 @ RF = 433.6 MHz SFE10.7MFP @ BIF2 = 40 kHz SFECV10.7MJS-A @ BIF2 = 150 kHz Tolerance 10% 10% 5% 5% 5% 5% 10% 10% 10% 10% 10% 10% 5% 5% 5% 5% 5% 5% Description 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 fundamental-mode crystal, Cload = 10 pF to 15pF, C0, max = 7 pF, Rm, max = 50 SAWFIL CERFIL leaded type SMD type 25ppm calibration 30ppm temp. B3dB = 860 kHz low-loss SAW filter from EPCOS 100 kHz (f0 = 433.92 MHz) TBD ceramic filter from Murata 40 kHz NIP - not in place, may be used optionally TH71101 Data Sheet 3901071101 Page 17 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Package Dimensions D D1 24 17 25 16 b e E E1 32 9 1 8 A A2 A1 L Fig. 6: LQFP32 (Low Quad Flat Package) All Dimension in mm, coplanarity < 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, coplanarity < 0.004" min 0.002 0.053 0.012 0.276 0.031 max 0.630 0.006 0.057 0.018 L 0.45 0.75 0.018 E, D 9.00 0 7 0 0.354 0.030 7 TH71101 Data Sheet 3901071101 Page 18 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Your Notes TH71101 Data Sheet 3901071101 Page 19 of 20 Nov. 2001 Rev. 005 TH71101 315/433MHz FSK/FM/ASK Receiver Your Notes Important Notice 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 life-support 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. (c) 2000 Melexis GmbH. 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: Phone: +32 1361 1631 E-mail: sales_europe@melexis.com All other locations: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com QS9000, VDA6.1 and ISO14001 Certified TH71101 Data Sheet 3901071101 Page 20 of 20 Nov. 2001 Rev. 005 |
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