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=25°C, 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 1˚C over 25˚C. !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: 330Ω 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: 330Ω 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 360Ω 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=25°C, VCC=3.0V) _ Signal source : fIN (MIX) = 248.45MHz, fIN (LO) = 237.75MHz, 100dBµV _ 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 µA 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 - dBµV 3rd order intercept point IP3 - 110 - dBµV Quiescent current Battery save quiescent current Battery save function input voltage Conditions With local oscillation OFF 〈 MIX - Oscillator section 〉 Mixer operating frequency VIN (MIX) = 60dBµV 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 - Ω fLO 20 - 120 MHz Local input level VIN (LO) 95 100 105 dBµV 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,100dBµV, 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 - Ω IF output level VOIF 0.4 0.5 0.6 VP-P IF duty ratio DR 40 50 60 % VIN (IF) = 80dBµV, CL = 10pF IF amplifier gain IF input resistance VIN (IF) = 80dBµV 〈 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) = 70dBµV Output voltage 3 VRSSI3 1.8 2.0 2.2 V VIN (IF) = 100dBµV DR - 70 - dB RO (RSSI) 12 15 18 kΩ TON - 20 - µs CL = 100pF, VIN (MIX) = 60dBµV 5 - µs CL = 100pF, VIN (MIX) = 60dBµV Dynamic range Output resistance Rise time at power on TOFF - RSSI rise time TR - 9 - µs CL = 100pF, VIN (MIX) = 60dBµV RSSI fall time TF - 11 - µs CL = 100pF, VIN (MIX) = 60dBµV 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) = 80dBµV Detection frequency fDET - 100 - kHz VIN (IF) = 80dBµV 〈 Detector unit 〉 Detection sensitivity mV / kHz VIN (IF) = 80dBµV S (12dB) 12 16 20 dBµV S / N ratio S/N 40 48 - dB VIN (IF) = 80dBµV AM rejection ratio AMR - 40 - dB VIN (IF) = 80dBµV, 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=60dBµV V5 V ~ 100p V ~ CL RIN=100kΩ 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=100dBµV 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 : Ω Capacitance : µV 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=100dBµV Units Resistance : Ω Capacitance : µF Fig. 2 BH4126FV Communication ICs !External dimensions (Units: mm) 1 8 4.4±0.2 9 0.65 0.15±0.1 1.15±0.1 0.1 6.4±0.3 5.0±0.2 16 0.22±0.1 0.3Min. 0.1 SSOP - B16