BH4126

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 FM detector output RSSI IF output 16 15 14 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 VCC PD Tstg Limits 7.0 350 *1 Unit V mW ˚C -55~+125 *1 Reduced by 3.5 mW for each increase in Ta of 1˚C over 25˚C. !Operating range Parameter Operating power supply voltage Operating temperature Symbol VCC Topr Limits 2.3~5.5 -40~+85 Unit V ˚C BH4126FV Communication ICs !Pin descriptions Pin No. Function Local oscillator pin (base) VCC Internal peripheral circuit DC voltage(V) 1 Connect crystal resonator and capacitor 5k VCC - 0.6 1 Local oscillator pin (emitter) 2 To MIXER 2 Connect capacitor or input local signal from external oscillator VCC Battery save pin "Pin 3 voltage" ≤ 0.2 : Battery save 3 30k 3 2 V ≤ "Pin 3 voltage" ≤ VCC : Active - Mixer output pin Connect ceramic filter Output impedance: 330Ω VCC 270 4 4 VCC - 1.5 GND pin 5 GND for IF stages and FM detection stages GND BH4126FV Communication ICs Pin No. Function IF amplifier bypass pin Connect capacitor 6 170 6 VCC Internal peripheral circuit DC voltage (V) VCC 3k IF amplifier input pin Connect ceramic filter Input impedance: 330Ω 7 170 7 VCC VCC pin 1 8 Vcc for MIX stages and IF front stage VCC VCC pin 2 9 Vcc for IF rear stage and FM detection stage VCC RSSI output pin Connect capacitor VCC 10 10 0.1 15k IF amplifier output pin Pins 11 and 12 are opposite-phase output 11 100 11 VCC VCC - 1 12 BH4126FV Communication ICs Pin No. Function Discriminator pin Connect phase shift coil or ceramic discriminator 500 Internal peripheral circuit VCC DC voltage(V) 13 13 VCC FM demodulation signal output pin Output impedance is 360Ω VCC 14 330 14 0.9 GND pin 15 GND for MIX stage 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 Quiescent current Battery save quiescent current Battery save function input voltage 〈 MIX - Oscillator section 〉 Mixer operating frequency Mixer conversion gain -1dB compression output level 3rd order intercept point Noise figure Mixer input admittance Mixer output resistance Local oscillator operating frequency Local input level Local input admittance Symbol IQ IQ (BS) VTH-H VTH-L Min. 4.4 2 GND Typ. 5.5 0 - Max. 6.6 5 VCC 0.2 Unit mA µA V V Active Conditions With local oscillation OFF Battery save fMIX GVC VOM IP3 NF YIN (MIX) RO (MIX) fLO VIN (LO) YIN (LO) 20 16 20 95 - 20 103 110 9.7 1.25+j7.47 330 100 1.36+j9.72 300 24 120 105 - MHz dB dBµV dBµV dB ms Ω MHz dBµV ms f=237.75MHz f1=248.75MHz,f2=249.05MHz LC matching input f=248.45MHz VIN (MIX) = 60dBµV 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 〈 IF section 〉 IF operating frequency IF amplifier gain IF input resistance IF output level IF duty ratio 〈 RSSI section 〉 Output voltage 1 Output voltage 2 Output voltage 3 Dynamic range Output resistance Rise time at power on Fall time at power off RSSI rise time RSSI fall time VRSSI1 VRSSI2 VRSSI3 DR RO (RSSI) TON TOFF TR TF 1.0 1.8 12 0.15 1.2 2.0 70 15 20 5 9 11 0.4 1.4 2.2 18 V V V dB kΩ µs µs µs µs CL = 100pF, VIN (MIX) = 60dBµV CL = 100pF, VIN (MIX) = 60dBµV CL = 100pF, VIN (MIX) = 60dBµV CL = 100pF, VIN (MIX) = 60dBµV No input VIN (IF) = 70dBµV VIN (IF) = 100dBµV fIF GV RIN (IF) VOIF DR 4 0.4 40 75 330 0.5 50 15 0.6 60 MHz dB Ω VP-P % VIN (IF) = 80dBµV VIN (IF) = 80dBµV, CL = 10pF Symbol Min. Typ. Max. Unit Conditions Signal source : fIN (IF) =10.7MHz, ∆f=±10kHz dev, fm=1kHz; AC level to be indicated by termination Parameter 〈 Detector unit 〉 Detection sensitivity Detection output level Detection frequency 12 dB SINAD sensitivity S / N ratio AM rejection ratio SDET VO fDET S (12dB) S/N AMR 110 12 40 21.2 150 100 16 48 40 195 20 mV / kHz VIN (IF) = 80dBµV mVrms kHz dBµV dB dB VIN (IF) = 80dBµV VIN (IF) = 80dBµV, AM = 30% VIN (IF) = 80dBµV VIN (IF) = 80dBµV Symbol Min. Typ. Max. Unit Conditions BH4126FV Communication ICs !Measurement circuit CL=10pF (Includes the capacity of the measurement system.) T1: 4162-JPS-024 (SUMIDA) V6 30kHz LPF T1 V6 V5 4.7k V ~ SG1 fIN=248.45MHz VIN=60dBµV RIN=100kΩ CL CL 100p V ~ 3p V ~ V V4 10 9 VCC 1000p 51 16 15 14 13 12 11 Quadrature DET. RSSI IF Local OSC. VCC 1 2 3 4 5 6 7 8 0.01 V1 V 2 SW1 SW2 2 1 1 2 SW3 1 0.1 1 1000p A 10 I1 3k V2 V 1.9V 0.3V SW4 1000p V ~ V3 0.01 2 VCC SG2 fIN=237.75MHz VIN=100dBµV SG3 fIN=10.7MHz 51 62 Units Resistance : Ω Capacitance : µV Fig. 1 BH4126FV Communication ICs !Application example Without FM detector. VCC Open 14 13 12 IF OUT T1: 4162-JPS-024 (SUMIDA) VCC FM Detector Out T1 10 RSSI IF OUT 100p fIN=248.45MHz 3p 1000p 16 15 14 13 12 11 10 9 VCC Quadrature DET. RSSI IF Local OSC. VCC 1 2 3 4 5 6 7 8 0.01 1 2 1000p BS fLO=237.75MHz VIN=100dBµV Units Resistance : Ω Capacitance : µF Fig. 2 0.1 0.1 BH4126FV Communication ICs !External dimensions (Units: mm) 5.0±0.2 16 9 6.4±0.3 4.4±0.2 1.15±0.1 1 8 0.1 0.65 0.22±0.1 0.3Min. 0.1 SSOP - B16 0.15±0.1