th7122 Melexis Company, th7122 Datasheet
th7122
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th7122 Summary of contents
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... Home and building automation General Description The TH7122 is a single chip FSK/FM/ASK transceiver IC designed to operate in low-power multi- channel programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used for applications in automotive, industrial-scientific-medical (ISM), short range devices (SRD) or similar appli- cations operating in the frequency range of 300 MHz to 930 MHz. In programmable user mode, the trans- ceiver can operate down to 27 MHz by employing an external VCO varactor diode ...
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... Stand-alone User Mode Operation ................................................................................. 18 4.1.1 Frequency Selection .................................................................................................................. 18 4.1.2 Operation Mode ......................................................................................................................... 18 4.1.3 Modulation Type ........................................................................................................................ 19 4.1.4 LNA Gain Mode ......................................................................................................................... 19 4.2 Programmable User Mode Operation............................................................................. 19 4.2.1 Serial Control Interface Description ........................................................................................... 19 5 Register Description ................................................................................................20 5.1 Register Overview .......................................................................................................... 21 39010 07122 Rev. 008 FSK/FM/ASK Transceiver Page TH7122 27 to 930MHz Data Sheet June/07 ...
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... Board Component List (Fig. 19) ..................................................................................... 39 9.2 Typical LNA S-Parameters in Receive Mode ................................................................. 39 9.3 LNA Input Impedances in Transmit Mode ...................................................................... 40 10 Package Description ................................................................................................41 10.1 Soldering Information ..................................................................................................... 41 11 Reliability Information..............................................................................................42 12 ESD Precautions ......................................................................................................42 13 Disclaimer .................................................................................................................44 39010 07122 Rev. 008 FSK/FM/ASK Transceiver Page TH7122 27 to 930MHz Data Sheet June/07 ...
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... The receiver is based on the principle of a single conversion superhet. Therefore the VCO frequency has to be changed between transmit and receive mode. In receive mode, the default LO injection type is low-side injection. The TH7122 transceiver IC consists of the following building blocks: " Low-noise amplifier (LNA) for high-sensitivity RF signal reception with switchable gain " ...
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... Rev. 008 FSK 1.5pF IFA R counter RO RO VCC_PLL LF VEE_PLL Fig. 1: TH7122 block diagram Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver IN_DEM OUT_DEM 3 6 PKDET SW1 bias OA2 INT2/PDO Demodulator MIX SW2 OA1 OUT_DTA 200k Control Logic ...
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... VEE VCC VCC 5µA RSSI 120 7 5µA VEE VEE Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Description IF amplifier input, approx. 2 kΩ single-ended positive supply of LNA, MIX, IFA, FSK Demodulator, PA, OA1 and OA2 IF amplifier output and de- modulator input, connection ...
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... VEE VCC TE/SDTA 120 16 120k VEE Page TH7122 27 to 930MHz Description OA1 output, high impedance in transmit and idle mode ground input, base of bipolar transistor FSK pulling pin, switch to ground or OPEN The switch is open in re- ceive and idle mode ...
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... VEE VEE VCC OUT_PA 1k 25 20p VEE VEE Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Description frequency select input / se- rial data enable input ground of serial port and control logic frequency select input / lock detector output VCO open-collector output, connection to VCC or exter- ...
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... IN_MIX 30 LO bias VEE VEE VCC OUT_MIX 100 32 VEE Page TH7122 27 to 930MHz Description ground of LNA and PA LNA open-collector output, connection to external LC tank at RF LNA input, single-ended LNA gain control input mixer input, approx. 200Ω single-ended ground of IFA, Demodulator, OA1 and OA2 mixer output, approx. 330Ω ...
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... Functional Description 3.1 PLL Frequency Synthesizer The TH7122 contains an integer-N PLL frequency synthesizer. A PLL circuit performs the frequency synthe- sis via a feedback mechanism. The output frequency f detector comparison frequency crystal oscillator. The phase detector utilizes this signal as a reference to tune the VCO and in the RO locked state it must be equal to the desired output frequency, divided by the feedback divider ratio N ...
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... According to that, the following counter 4-16 0-12 ≤ ≤ ≤ 8191 ; ≤ ≤ N 131071 . , the maximum operating frequency of the VCO is R Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver VCC I RO 36pF 36pF RO XTAL CX2 VEE FSKSW CX1 Fig. 3: Reference oscillator circuit (3) ( and the ...
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... K PD where I is the charge pump current which is set via register CPCUR. In the TH7122 design the VCO CP frequency control characteristic is with negative polarity. This means the VCO frequency increases if the loop filter output voltage decreases and vice versa. When an external varactor diode is added to the VCO tank, the tuning characteristic can be changed between positive and negative depending on the particular varactor diode circuitry ...
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... LC-based filter (e.g. helix type). 39010 07122 Rev. 008 ). The register ERTM decides on the maximum number of clocks RO Fig. 5: VCO schematic nd Fig order Loop filter Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver VCC External Loop Filter TNK_LO LF VD 6.3pF VCOCUR Charge Pump ...
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... The output of the RSSI signal is available at pin RSSI. The voltage at this pin is proportional to the input power of the receiver in dBm. Using this RSSI output signal the signal strength of different transmitters can be distinguished. 3.2.4 ASK Demodulator The receive part of the TH7122 allows for two ASK demodulation configurations: • standard ASK demodulation or • ASK demodulation with peak detector. ...
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... R L The output capacitance is typically 3 pF. 39010 07122 Rev. 008 , the CC Fig. 7: − VCE ) = CC SAT . ⋅ Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver VCC VCC 3pF OUT_PA VEE OUT_PA schematic (9) Data Sheet June/07 ...
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... Rev. 008 20.00 10.00 0.00 -10.00 -20.00 -30.00 -40.00 1 Description Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver P4 315MHz 433MHz 868MHz 915MHz 10 RPS / kOhm The transceiver is ASK-modulated by turning on and off the power amplifier. Please also refer to para. 1.3 for ASK modulation limits. ...
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... NRZ. An external VCO tuning varactor should be added for narrow-band applications, for example at channel spacings of 25 kHz. For details please refer to the application notes “TH7122 and TH71221 High Speed Data Communication” and “TH7122 and TH71221 Used In Narrow Band FSK Applications” as well as to the “ ...
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... MHz 868.30 MHz 433.92 MHz 868.30 MHz 10.7 MHz 10.7 MHz Standby Receive Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver 315 MHz 915 MHz 7.1505 MHz 18 32 397.25 kHz 223.45 kHz 766 4047 304 ...
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... Fig. 12: SCI Block Diagram Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver FSK 1 low LATCH A-word 22 B-word B - LATCH LATCH C-word 22 D-word D - LATCH Data Sheet June/07 ...
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... FS0 and FS1 before entering the PUM. Table 5.1.1 shows the default register settings of different frequency selections. It should be noted that the channel frequency listed below will be achieved with a crystal frequency of 7.1505 MHz. The following table depicts an overview of the register configuration of the TH7122. 39010 07122 Rev. 008 ...
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... Depends on FS0/FS1 voltage level after power Depends on FS0/FS1 voltage level after power up BAND VCOCUR 16d 0 01 32d 1 11 32d 0 00 18d Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver LSB ...
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... FSK, ‘1’ for mark at ASK or f min inverse ‘1’ for space at ASK FSK, ‘0’ for mark at ASK or f min Active blocks in IDLE mode only RO active whole PLL active Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver #default #default #default #default #default #default #default ...
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... RSSI Peak Detector disabled The RSSI output signal directly feeds the data slicer setup by means of OA1. enabled In ASK receive mode the RSSI Peak Detector output is multiplexed to pin INT2/PDO. Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver #default #default #default #default ...
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... LNA gain control LNA gain will be set via pin GAIN_LNA. internal LNA gain control LNA gain will be set via bit LNAGAIN (bit 12 in A-word). Nevertheless pin GAIN_LNA must be connected to either VCC or VEE. Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver pos neg #default ...
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... Modulation will be set via pin ASK/FSK. internal modulation control Modulation will be set via bit MODSEL (bit 19 in A-word). Nevertheless pin ASK/FSK must be connected to either VCC or VEE. Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver #default Data Sheet June/07 ...
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... IF_FSK f Set by crystal RO Set by crystal and f R R-counter Δ FSK w/ crystal pulling, NRZ R FSK w/ direct VCO mod., NRZ R NRZ ASK VCO Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Min Max Unit -0.3 6.0 V -0 dBm -40 +125 °C +150 °C 0.25 ...
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... Reg. TXPOWER =10 0.3V, PS_PA CW mode Transmit mode, Reg. TXPOWER =11 0.3V, PS_PA CW mode V only IL_FS1/LD in Stand-alone user V IL mode V only IH_FS1/LD in Stand-alone user V IH mode Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Min Typ Max Unit 50 200 nA 0.2 0.3 0.6 mA 2.3 3.5 4.8 mA 3.9 6.3 7.8 2.9 6.1 8.0 mA 5.3 8.9 11.9 3.1 7.4 ...
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... V Reg. LNACTRL = 0, GAIN_LH Reg. LNAHYST = 1 Receive mode 100μV L_RSSI IN_IFA (CW, 10.7MHz) Receive mode 100mV H_RSSI IN_IFA (CW, 10.7MHz) Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Min Typ Max Unit 70 120 220 kΩ μA -2 μ MΩ 1 MΩ ...
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... LNA @ low gain maxL_FSK P LNA @ high gain maxH_FSK from standby to receive t on_ASK mode from standby to receive t on_FSK mode referred to receiver P spur_RX input Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Min Typ Max Unit 200 500 1 ms Min Typ Max Unit -96 dBm -96 ...
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... CWH Symbol Condition f fundamental mode, AT crystal C load only required for FSK spur Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Unit Min Typ Max -7 dBm -10 1 dBm -2 6 dBm 3 10 dBm 9 ±2.5 ±25 ±80 kHz ±6 ...
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... VEE_LNA 28 OUT_LNA TH7122 29 GAIN_LNA 30 IN_MIX 31 VEE_IF OUT_MIX CB5 C4 RP CB4 Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Lock detect SDEN SDTA 3wire bus 16 SCLK RE/SCLK 15 CB7 VCC_DIG 14 13 ASK/FSK FSK 12 IN_DTA input CX2 FSK_SW XTAL CX1 ...
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... IN_LNA 27 VEE_LNA OUT_LNA 28 TH7122 29 GAIN_LNA 30 IN_MIX 31 VEE_IF OUT_MIX CB5 RP CB4 Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver TX 16 enable RX RE/SCLK 15 enable CB7 VCC_DIG 14 13 ASK/FSK FSK 12 IN_DTA input CX2 11 FSK_SW 10 RO XTAL CX1 9 VEE_RO 8 FSK ...
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... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB CDSCB10M7GA136 Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Tol. Description ±5% VCO tank capacitor ±5% LNA output tank capacitor ±5% MIX input matching capacitor ±10% data slicer capacitor ± ...
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... C3 CB5 f = 8.0000MHz 3043 8 315 4233 8 434 9043 8 915 Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Lock detect SDEN SDTA 3wire bus 16 SCLK RE/SCLK 15 CB7 VCC_DIG 14 13 ASK/FSK ASK IN_DTA 12 input FSK_SW XTAL CX1 ...
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... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Description VCO tank capacitor LNA output tank capacitor MIX input matching capacitor data slicer capacitor RSSI output low pass capacitor de-coupling capacitor ...
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... R1 R2 CB5 8.0000MHz 3043 8 315 4233 8 434 9043 8 915 Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Lock detect SDEN SDTA 3wire bus 16 SCLK RE/SCLK 15 CB7 VCC_DIG 14 13 ASK/FSK ASK IN_DTA 12 input 11 FSK_SW 10 RO XTAL CX1 ...
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... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver Description VCO tank capacitor LNA output tank capacitor MIX input matching capacitor RSSI output low pass capacitor PKDET capacitor de-coupling capacitor ...
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... Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver VCC C01 RB0 R01 CB6 VD1 C0 Lock detect L0 SDEN SDTA 3wire bus 16 SCLK RE/SCLK ...
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... Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver CB2 VCC CTX4 LTX0 LTX1 OUT_PA 25 CTX0 LRX2 CTX2 CTX1 IN_LNA 26 CRX0 ] Im[S ] Re[S ] ...
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... Rev. 008 LNA off, Pin LNA is shorted L Frequency R S 32.7 Ω 1.9 nH 315 MHz 33.6 Ω 2.1 nH 433 MHz 35.7 Ω 2.4 nH 868 MHz 36.6 Ω 2.2 nH 915 MHz Page TH7122 27 to 930MHz FSK/FM/ASK Transceiver IN_LNA 2.2 nH 2.3 nH 2.7 nH 2.8 nH Data Sheet June/07 ...
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... E1 min 7.00 9.00 max All Dimension in inch, coplanaríty < 0.004” min 0.276 0.354 max 10.1 Soldering Information • The device TH7122 is qualified for MSL3 with soldering peak temperature 260 deg C according to JEDEC J-STD-20 39010 07122 Rev. 008 12° ...
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... Use of Certain Hazardous Substances) please visit the quality page on our website: http://www.melexis.com/quality_leadfree.aspx 12 ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 39010 07122 Rev. 008 FSK/FM/ASK Transceiver Page TH7122 27 to 930MHz Data Sheet June/07 ...
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... Your Notes 39010 07122 Rev. 008 FSK/FM/ASK Transceiver Page TH7122 27 to 930MHz Data Sheet June/07 ...
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... Europe, Africa: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com 39010 07122 Rev. 008 FSK/FM/ASK Transceiver www.melexis.com Americas: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified Page TH7122 27 to 930MHz Asia: Phone: +32 1367 0495 E-mail: sales_asia@melexis.com Data Sheet June/07 ...