BH4138FV

Communication ICs 2nd mixer and IF amplifier IC for digital cellular BH4138FV The BH4138FV is an IC developed for use with digital cellular phones. This IC contains a 2nd mixer and IF amplifier. FApplications Digital cellular phones FFeatures 1) Mixer circuit, IF amplifier, and RSSI circuit are builtin. 2) Mixer input frequency response 10MHz to 200MHz. 3) The recommended IF amplifier frequencies are 450kHz and 455kHz. FAbsolute maximum ratings (Ta = 25_C) 4) 5) 6) 7) High gain IF amplifier (100dB). Battery saving function. Buffer amplifier for RSSI. Low voltage operation (2.3V to 5.5V). FRecommended operating conditions (Ta = 25_C) 664 Communication ICs FBlock diagram BH4138FV 665 Communication ICs FPin descriptions BH4138FV 666 Communication ICs BH4138FV 667 Communication ICs BH4138FV 668 Communication ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.0V, SG1 fIN(MIX) = 130MHz, SG2 fIN(LO) = 129.55MHz, 100dBµV, SG3 fIN(IF) = 450kHz) FAlternating level to be indicated by termination. F∗Items marked with an asterisk are reference values BH4138FV 669 Communication ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.0V, SG1 fIN(MIX) = 130MHz, SG2 fIN(LO) = 129.55MHz, 100dBµV, SG3 fIN(IF) = 450kHz) FAlternating level to be indicated by termination. F∗Items marked with an asterisk are reference values BH4138FV 670 Communication ICs FMeasurement circuit BH4138FV 671 Communication ICs FApplication example ...