BH4126FV Communication ICs Wide band IF detector for RF remote control units BH4126FV The BH4126FV is an IC equipped with internal mixer, IF amplifier, and FM detector circuits, developed for use with RF remote control units. !Applications Keyless entry !Features 1) Equipped with internal mixer, IF, RSSI, and FM detection circuits. 2) Can be operated at mixer input frequencies ranging from 20MHz to 300MHz. 3) Equipped with a battery power saving function. 4) Fast RSSI response. 5) High FM detection sensitivity. (21.2mV / kHz) BH4126FV Communication ICs !Block diagram VCC IF input 16 RSSI FM detector output IF output 14 15 13 12 11 10 9 VCC Quadrature DET. RSSI IF Local OSC. VCC 1 2 3 4 5 6 7 8 Local Battery save VCC !Absolute maximum ratings (Ta=25C, for measurement circuit) Parameter Power supply voltage Power dissipation Storage temperature Symbol Limits Unit VCC 7.0 V *1 PD 350 Tstg -55~+125 mW C *1 Reduced by 3.5 mW for each increase in Ta of 1C over 25C. !Operating range Parameter Symbol Limits Unit Operating power supply voltage VCC 2.3~5.5 V Operating temperature Topr -40~+85 C BH4126FV Communication ICs !Pin descriptions Function Pin No. Internal peripheral circuit DC voltage(V) Local oscillator pin (base) VCC VCC - 0.6 5k 1 Connect crystal resonator and capacitor 1 Local oscillator pin (emitter) 2 2 To MIXER Connect capacitor or input local signal from external oscillator VCC Battery save pin "Pin 3 voltage" 0.2 : Battery save 30k 3 3 2 V "Pin 3 voltage" VCC : Active - Mixer output pin Connect ceramic filter Output impedance: 330 VCC 270 4 4 GND pin 5 VCC - 1.5 GND for IF stages and FM detection stages GND BH4126FV Communication ICs Pin No. Function Internal peripheral circuit DC voltage (V) IF amplifier bypass pin Connect capacitor VCC 6 3k VCC 170 6 IF amplifier input pin Connect ceramic filter Input impedance: 330 170 7 7 VCC VCC pin 1 Vcc for MIX stages and IF front stage 8 VCC VCC pin 2 Vcc for IF rear stage and FM detection stage 9 VCC RSSI output pin VCC Connect capacitor 10 0.1 15k 10 IF amplifier output pin Pins 11 and 12 are opposite-phase output VCC 11 100 11 12 VCC - 1 BH4126FV Communication ICs Pin No. Function DC voltage(V) Internal peripheral circuit Discriminator pin VCC Connect phase shift coil or ceramic discriminator 500 13 13 VCC FM demodulation signal output pin VCC Output impedance is 360 330 14 0.9 14 GND pin GND for MIX stage 15 GND Mixer pin VCC Connect first IF signal from DC cutoff 16 2.4k 16 2.4k 1.0 BH4126FV Communication ICs !Electrical characteristics (unless otherwise noted, Ta=25C, VCC=3.0V) _ Signal source : fIN (MIX) = 248.45MHz, fIN (LO) = 237.75MHz, 100dBV _ AC level to be indicated by termination Parameter Symbol Min. Typ. Max. Unit IQ 4.4 5.5 6.6 mA IQ (BS) - 0 5 A VTH-H 2 - VCC V Active VTH-L GND - 0.2 V Battery save fMIX 20 - 300 MHz Mixer conversion gain GVC 16 20 24 dB -1dB compression output level VOM - 103 - dBV 3rd order intercept point IP3 - 110 - dBV Quiescent current Battery save quiescent current Battery save function input voltage Conditions With local oscillation OFF MIX - Oscillator section Mixer operating frequency VIN (MIX) = 60dBV f1=248.75MHz,f2=249.05MHz NF - 9.7 - dB LC matching input Mixer input admittance YIN (MIX) - 1.25+j7.47 - ms f=248.45MHz Mixer output resistance RO (MIX) - 330 - fLO 20 - 120 MHz Local input level VIN (LO) 95 100 105 dBV Local input admittance YIN (LO) - 1.36+j9.72 - ms Noise figure Local oscillator operating frequency f=237.75MHz BH4126FV Communication ICs Signal source : fIN (MIX) = 248.45MHz, fIN (LO) = 237.75MHz,100dBV, fIN (IF) = 10.7MHz; AC level to be indicated by termination Parameter Symbol Min. Typ. Max. Unit fIF 4 - 15 MHz Conditions IF section IF operating frequency GV - 75 - dB RIN (IF) - 330 - IF output level VOIF 0.4 0.5 0.6 VP-P IF duty ratio DR 40 50 60 % VIN (IF) = 80dBV, CL = 10pF IF amplifier gain IF input resistance VIN (IF) = 80dBV RSSI section Output voltage 1 VRSSI1 - 0.15 0.4 V No input Output voltage 2 VRSSI2 1.0 1.2 1.4 V VIN (IF) = 70dBV Output voltage 3 VRSSI3 1.8 2.0 2.2 V VIN (IF) = 100dBV DR - 70 - dB RO (RSSI) 12 15 18 k TON - 20 - s CL = 100pF, VIN (MIX) = 60dBV 5 - s CL = 100pF, VIN (MIX) = 60dBV Dynamic range Output resistance Rise time at power on TOFF - RSSI rise time TR - 9 - s CL = 100pF, VIN (MIX) = 60dBV RSSI fall time TF - 11 - s CL = 100pF, VIN (MIX) = 60dBV Unit Fall time at power off Signal source : fIN (IF) =10.7MHz, f=10kHz dev, fm=1kHz; AC level to be indicated by termination Parameter Symbol Min. Typ. Max. Conditions SDET - 21.2 - Detection output level VO 110 150 195 mVrms VIN (IF) = 80dBV Detection frequency fDET - 100 - kHz VIN (IF) = 80dBV Detector unit Detection sensitivity mV / kHz VIN (IF) = 80dBV S (12dB) 12 16 20 dBV S / N ratio S/N 40 48 - dB VIN (IF) = 80dBV AM rejection ratio AMR - 40 - dB VIN (IF) = 80dBV, AM = 30% 12 dB SINAD sensitivity BH4126FV Communication ICs !Measurement circuit CL=10pF (Includes the capacity of the measurement system.) T1: 4162-JPS-024 (SUMIDA) T1 V6 4.7k V ~ SG1 fIN=248.45MHz VIN=60dBV V5 V ~ 100p V ~ CL RIN=100k CL 30kHz LPF V6 3p V V4 51 1000p 16 15 14 13 12 11 10 9 VCC Quadrature DET. RSSI IF Local OSC. VCC 3 4 SW1 V 6 SW2 2 7 8 0.01 1 SW3 2 1 1 2 1.9V 0.3V V3 62 SG2 fIN=237.75MHz VIN=100dBV A I1 SW4 V ~ 0.01 V 1000p V2 3k 10 1 2 VCC SG3 fIN=10.7MHz 51 V1 5 0.1 2 1000p 1 Units Resistance : Capacitance : V Fig. 1 BH4126FV Communication ICs !Application example Without FM detector. VCC IF OUT Open 14 13 12 T1: 4162-JPS-024 (SUMIDA) VCC T1 RSSI 10 FM Detector Out IF OUT 3p 0.1 100p fIN=248.45MHz 1000p 16 15 14 13 12 11 10 9 VCC Quadrature DET. RSSI IF Local OSC. VCC 3 2 4 5 6 7 8 2 BS 1000p 1 0.1 0.01 1 fLO=237.75MHz VIN=100dBV Units Resistance : Capacitance : F Fig. 2 BH4126FV Communication ICs !External dimensions (Units: mm) 1 8 4.40.2 9 0.65 0.150.1 1.150.1 0.1 6.40.3 5.00.2 16 0.220.1 0.3Min. 0.1 SSOP - B16 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0