A p p l i c a t i o n N o t e , R e v . 1 . 2 , A ug us t 2 00 7 A p p li c a t i o n N o t e N o . 1 1 1 L o w - c o s t, H i g h - p e r f or m a nc e s o l u t i on o f B FP 5 40 E SD + SAW Fi l t e r f o r T PM S & R KE‘ s R x Front End R F & P r o t e c ti o n D e v i c e s Edition 2007-08-30 Published by Infineon Technologies AG 81726 München, Germany © Infineon Technologies AG 2009. All Rights Reserved. LEGAL DISCLAIMER THE INFORMATION GIVEN IN THIS APPLICATION NOTE IS GIVEN AS A HINT FOR THE IMPLEMENTATION OF THE INFINEON TECHNOLOGIES COMPONENT ONLY AND SHALL NOT BE REGARDED AS ANY DESCRIPTION OR WARRANTY OF A CERTAIN FUNCTIONALITY, CONDITION OR QUALITY OF THE INFINEON TECHNOLOGIES COMPONENT. THE RECIPIENT OF THIS APPLICATION NOTE MUST VERIFY ANY FUNCTION DESCRIBED HEREIN IN THE REAL APPLICATION. INFINEON TECHNOLOGIES HEREBY DISCLAIMS ANY AND ALL WARRANTIES AND LIABILITIES OF ANY KIND (INCLUDING WITHOUT LIMITATION WARRANTIES OF NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY) WITH RESPECT TO ANY AND ALL INFORMATION GIVEN IN THIS APPLICATION NOTE. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. Application Note No. 111 Application Note No. 111 Revision History: 2007-08-30, Rev. 1.2 Previous Version: 2006-12-14, Rev. 1.1 Page Subjects (major changes since last revision) All Small changes in figure descriptions Trademarks SIEGET® is a registered trademark of Infineon Technologies AG. Application Note 3 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & 1 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & RKE‘s Rx Front End Overview • • • • The BFP540ESD of Infineon Technologies is an ESD-hardened SIEGET silicon transistor. The combination of high gain, low noise figure, excellent ESD performance makes the BFP540ESD ideal as a wide band feedback LNA to boost the sensitivity of Remote Keyless Entry (RKE) and Tire Pressure Monitoring Systems (TPMS). Infineon BFP540ESD can stand 1000 V Electro-Static Discharge Pulses (Human Body Model) between any pair of terminals. BCR400W is designed for stabilizing bias current from less than 0.2 mA to 200 mA even at low battery, which is applied to the evaluation board to improve DC reliability as RF performance is sensitive to current. Alternatives of the SAW filters B3710 B3711 made by EPCOS will be used after BFP540ESD LNA stage in the test board according to operation frequency. Measurement results of every stage and the whole board will be tested and shown. Board overview The Demo board as shown in Figure2 is built on low cost 1mm thickness FR4 PC-Board material of three layers, the cross-section of which is shown in Figure1. Schematic and bill of materials are shown in Figure 3 and Table1 respectively. $1B&URVVB6HFWLRQYVG Figure 1 PCB Cross Section Application Note 4 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Figure 2 Photo of evaluation board Application Note 5 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & SRZHUVXSSO\ 9 *3 %&5: 5 2KP & HS) 5 2KP & HS) 5 2KP 5 2KP & S) & S) 6 % 3257 3 = 2KP & *3 & & S) %% 3257 3 = 2KP ( $1B6FKHPDWLFB73065.(B/1$YVG Figure 3 Schematic of TPMS&RKE LNA application Application Note 6 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 1 Part Number Bill Of Material Value Package Manufacturer Comment C1 120 pF 0402 Various DC Block, Input C2 330 pF 0402 Various DC Block for feedback network C3 47 pF 0402 Various DC Block C4* 0.22 µF 0402 Various Decoupling, Low Frequency C5* 10000 pF 0402 Various Decoupling R1 750 Ω 0402 Various Feedback Resistor for LNA R2 300 Ω 0402 Various Bias for Collector, Block AC Signal R3 100 Ω 0402 Various Bias for Collector, BCR400W Control Current by R3 R4 62 kΩ 0402 Various Bias for Base GP1 - SOT343 Infineon Technologies BFP540ESD ESD-Hardened to 1 kV HBM GP2 - SOT343 Infineon Technologies BCR400W for stabilizing current GP3 B3711/B3710 DCC6C EPCOS Band Pass SAW Filter * In order to avoid loop oscillation (hunting), time constants must be chosen adequately, i.e. C1 >= 10 x C2 Table 2 Summary of BFP540ESD LNA Data Parameter Results Frequency Range 0.3 MHz ~ 600 MHz DC Current 5 mA VCE of BFP540ESD 3V Gain 17.9 dB @ 315 MHz 17.5 dB @ 434 MHz NF 1.47 dB @ 315 MHz 1.4 dB @ 434 MHz Input Return Loss 11.4 dB @ 315 MHz 11.1 dB @ 434 MHz Output Return Loss 12.6 dB @ 315 MHz 12.2 dB @ 434 MHz Reverse Isolation -24 dB @ 315 MHz -24 dB @ 434 MHz Application Note Comments 7 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 3 Summary of SAW Filter data B3711 Parameter Results Comments Centre Frequency 315 MHz Insertion Loss 1.34 dB @ 315 MHz Input Return Loss 23.6 dB @ 315 MHz Output Return Loss 23.35 dB @ 315 MHz Attenuation 28.6 dB @ 310 MHz 29.7 dB @ 320 MHz 55.8 dB @ 440 MHz 70.8 dB @ 260 MHz B3710 Parameter Results Centre Frequency 433.92 MHz Insertion Loss 2.0 dB @ 434 MHz Input Return Loss 24.8 dB @ 315 MHz Output Return Loss 20.5 dB @ 315 MHz Attenuation 22.6 dB @ 428 MHz 20.7 dB @ 440 MHz 68.5 dB @ 380 MHz 68.5 dB @ 470 MHz Application Note Comments 8 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 4 Summary of the front end data (BFP540ESD LNA + Bandpass filter) BFP540 + B3711 Parameter Results Comments Frequency Range 314.7 MHz ~ 315.3 MHz DC Current 5 mA VCE of BFP540ESD 3V Gain 16.5 dB @ 315 MHz NF 1.48 dB @ 315 MHz Input Return Loss 11.4 dB @ 315 MHz Output Return Loss 13.9 dB @ 315 MHz Reserve Isolation 25.1 dB @ 315 MHz Input 1dB compression -21.17 dB @ 315 MHz Input IIP3 -11.28 dBm Two tones Tone1, -33 dB @ 314.5 MHz Tone2, -22 dB @ 315.5 MHz Parameter Results Comments Frequency Range 433 MHz ~ 434.71 MHz DC Current 5 mA VCE of BFP540ESD 3V Gain 15.93 dB @ 434 MHz NF 1.42 dB @ 434 MHz Input Return Loss 11.37 dB @ 434 MHz Output Return Loss 13.52 dB @ 434 MHz Reserve Isolation -25.7 dB @ 434 MHz Input 1dB compression -15.06 dB @ 434 MHz Input IIP3 -10.96 dBm BFP540 + B3710 Application Note Two tones Tone1, -33 dB @ 433.5 MHz Tone2, -22 dB @ 434.5 MHz 9 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & K and B1 of BFP540ESD LNA % . )UHTXHQF\*+] $1BGLDB.BDQGB%YVG Figure 4 K(f) and B1(f) Application Note 10 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 5 Noise Figure of BFP540ESD LNA Alone! (429 MHz ~ 439 MHz) Frequency Noise Figure Gain 429.00000 MHz 1.4535 dB 16.8217 dB 430.00000 MHz 1.4239 dB 16.8102 dB 431.00000 MHz 1.3928 dB 16.8081 dB 432.00000 MHz 1.4028 dB 16.7978 dB 433.00000 MHz 1.3976 dB 16.7917 dB 434.00000 MHz 1.3975 dB 16.7948 dB 435.00000 MHz 1.4072 dB 16.7872 dB 436.00000 MHz 1.3978 dB 16.8054 dB 437.00000 MHz 1.3953 dB 16.8091 dB 438.00000 MHz 1.3975 dB 16.8161 dB 439.00000 MHz 1.4203 dB 16.8087 dB $1BGLDBQIB/1$BYVG Figure 5 Noise Figure of BFP540ESD LNA Alone! (429 MHz ~ 439 MHz) Application Note 11 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 6 Noise Figure of BFP540ESD LNA Alone! (310 MHz ~ 320 MHz) Frequency Noise Figure Gain 310.00000 MHz 1.4276 dB 17.5669 dB 311.00000 MHz 1.4417 dB 17.5742 dB 312.00000 MHz 1.4781 dB 17.5883 dB 313.00000 MHz 1.4844 dB 17.6047 dB 314.00000 MHz 1.4832 dB 17.6190 dB 315.00000 MHz 1.4701 dB 17.6160 dB 316.00000 MHz 1.4714 dB 17.6143 dB 317.00000 MHz 1.4423 dB 17.6207 dB 318.00000 MHz 1.4510 dB 17.6100 dB 319.00000 MHz 1.4497 dB 17.6053 dB 320.00000 MHz 1.4667 dB 17.6062 dB $1BGLDBQIB/1$BYVG Figure 6 Noise Figure of BFP540ESD LNA Alone! (310 MHZ ~ 320 MHz) Application Note 12 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 7 Noise Figure of Front End (BFP540ESD LNA Plus SAW Filter B3710) Frequency Noise Figure Gain 429.00000 MHz 1.9124 dB 09.3424 dB 430.00000 MHz 1.4987 dB 12.5603 dB 431.00000 MHz 1.4629 dB 14.3943 dB 432.00000 MHz 1.4232 dB 15.3753 dB 433.00000 MHz 1.4064 dB 15.8708 dB 434.00000 MHz 1.4205 dB 15.9757 dB 435.00000 MHz 1.4197 dB 15.8990 dB 436.00000 MHz 1.4267 dB 15.5684 dB 437.00000 MHz 1.4484 dB 14.7000 dB 438.00000 MHz 1.5412 dB 12.8730 dB 439.00000 MHz 1.6300 dB 09.9760 dB $1BGLDBQIBIURQWHQGBYVG Figure 7 Noise Figure of Front End (BFP540ESD LNA Plus SAW Filter B3710) Application Note 13 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Table 8 Noise Figure of Front End (BFP540ESD LNA Plus SAW Filter B3711) Frequency Noise Figure Gain 310.00000 MHz 2.2143 dB 00.3415 dB 311.00000 MHz 1.6532 dB 06.7412 dB 312.00000 MHz 1.5981 dB 11.4291 dB 313.00000 MHz 1.5628 dB 14.2293 dB 314.00000 MHz 1.5060 dB 15.6274 dB 315.00000 MHz 1.4844 dB 16.0749 dB 316.00000 MHz 1.4775 dB 15.8385 dB 317.00000 MHz 1.5128 dB 14.7086 dB 318.00000 MHz 1.5952 dB 12.3993 dB 319.00000 MHz 1.7307 dB 08.9415 dB 320.00000 MHz 1.9356 dB 04.6864 dB $1BGLDBQIBIURQWHQGBYVG Figure 8 Noise Figure of Front End (BFP540ESD LNA Plus SAW Filter B3711) Application Note 14 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Return Loss of BFP540ESD LNA Alone! '%_6_ 0+] G% 0+] G% )UHTXHQF\0+] $1BGLDBUOB/1$B6YVG Figure 9 S11(f) '%_6_ 0+] G% 0+] G% )UHTXHQF\0+] $1BGLDBUOB/1$B6YVG Figure 10 S22(f) Application Note 15 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Forward Gain and Isolation of BFP540 LNA Alone! '%_6_ 0+] G% 0+] G% $1BGLDBIZBJDLQBLVRB/1$B6YVG Figure 11 S21(f) '%_6_ 0+] G% 0+] G% )UHTXHQF\0+] $1BGLDBIZBJDLQBLVRB/1$B6YVG Figure 12 S12(f) Application Note 16 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Return Loss of Front End (BFP540ESD LNA Plus SAW Filter B3710) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBUOBIH%B6YVG Figure 13 S11(f) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBUOBIH%B6YVG Figure 14 S22(f) Application Note 17 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Smith Chart of Return Loss (BFP540ESD LNA Plus SAW Filter B3710) 0+] 6 6ZS0D[ 0+] U [ 6ZS0LQ 0+] $1BVPLWKBUOBIH%B6YVG S11(f) 6 6ZS0D[ 0+] Figure 15 0+] U [ 6ZS0LQ 0+] $1BVPLWKBUOBIH%B6YVG Figure 16 S22(f) Application Note 18 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Forward Gain and Isolation of Front End (BFP540ESD LNA Plus SAW Filter B3710) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBIZBJDLQBLVRBIH%B6YVG Figure 17 S21(f) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBIZBJDLQBLVRBIH%B6YVG Figure 18 S12(f) Application Note 19 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Input IIP3 of Front End (BFP540ESD Plus SAW Filter B3710) Two Tones: • • Tone1, -33 dB @ 433.5 MHz Tone2, -33 dB @ 434.5 MHz Input IP3 = -33+(44.08/2) = -10.96 dBm $1BGLDB,,3BIH%YVG Figure 19 Input IIP3 of Front End (BFP540ESD Plus SAW Filter B3710) Application Note 20 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Input 1dB compression of Front End (BFP540ESD Plus SAW Filter B3710’) $1BGLDBG%BIH%YVG Figure 20 Input 1dB compression of Front End (BFP540Esd Plus SAW Filter B3710) Application Note 21 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Return Loss of Front End (BFP540ESD LNA Plus SAW Filter B3711) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBUOBIH%B6YVG Figure 21 S11(f) Application Note 22 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Smith Chart of Return Loss of Front End (BFP540ESD LNA Plus SAW Filter B3711) 6ZS0D[ 0+] 6 0+] U [ 6ZS0LQ 0+] $1BVPLWKBUOBIH%B6YVG S22(f) 6 6ZS0D[ 0+] Figure 22 0+] U [ 6ZS0LQ 0+] $1BVPLWKBUOBIH%B6YVG Figure 23 S11(f) Application Note 23 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Forward Gain and Isolation of Front End (BFP540ESD LNA Plus SAW Filter B3711) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBIZBJDLQBLVRBIH%B6YVG Figure 24 S12(f) '%_6_ 0+] G% )UHTXHQF\0+] $1BGLDBIZBJDLQBLVRBIH%B6YVG Figure 25 S21(f) Application Note 24 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Input IIP3 of Front End (BFP540ESD Plus SAW Filter B3711) Two Tones: • • Tone1, -33 dB @ 314.5 MHz Tone2, -33 dB @ 315.5 MHz Input IP3 = -33+(43.43/2) = -11.28 dBm $1BGLDB,,3BIH%YVG Figure 26 Input IIP3 of Front End (BFP540ESD Plus SAW Filter B3711) Application Note 25 Rev. 1.2, 2007-08-30 Application Note No. 111 Low-cost, High-performance solution of BFP540ESD+SAW Filter for TPMS & Input 1 dB compression of Front End (BFP540ESD Plus SAW Filter B3711’) $1BGLDBG%BIH%YVG Figure 27 Input 1 dB compression of Front End (BFP540Esd Plus SAW Filter B3711) Application Note 26 Rev. 1.2, 2007-08-30