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TDA7421N 数据表(PDF) 11 Page - STMicroelectronics |
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TDA7421N 数据表(HTML) 11 Page - STMicroelectronics |
11 / 38 page 11/38 TDA7421N Symbol Parameter Test Condition Min. Typ. Max. Unit FSDMAX Field Strength Detector Maximum Threshold VFMLIMIN level at which VMUTE,DRIVE = VMUTE, FSM3-0 set to 1111 67.5 dB µV Detuning Detector Ref: FM Test Circuit; HDDIS and SMDIS set to 1, measure: - Input at VFMLIMIN, CW - output at VMUTE,DRIVE DDSTART Detuning Detector Starting Point frequency shift from 10.7MHz at which VMUTE,DRIVE = VPLAY ±23 KHz DDSLOPE,MIN Detuning Detector Minimum Muting Slope frequency shift from 10.7MHz + DDSTART at which VMUTE,DRIVE = VMUTE, BWM2-0 set to 100, SEEK set to 0 30 KHz DDSLOPE,MAX Detuning Detector Maximum Muting Slope frequency shift from 10.7MHz + DDSTART at which VMUTE,DRIVE = VMUTE, BWM2-0 set to 001, SEEK set to 0 10 KHz DDTRC Detuning Detector Time Constant Ratio ratio of "reception" mode integration time constant inside the Detuning Detector with respect to "seek" mode 34/6 s/s Adjacent Channel Detector Ref: FM Test Circuit; BWDIS and SMDIS set to 1, measure: - Input at VFMLIMIN: desired 10.7MHz, 95dBµV CW; undesired 10.8MHz CW - output at VMUTE,DRIVE ACDMAX Adjacent Channel Quality Detector Maximum Sensitivity Threshold amplitude of undesired signal at which VMUTE,DRIVE = VMUTE, HDM4-0 set to 11111 91 dBu ACDMIN Adjacent Channel Quality Detector Minimum Sensitivity Threshold amplitude of undesired signal at which VMUTE,DRIVE = VPLAY, HDM4-0 set to 00000 94.8 dBu Field Strength Station Detector Ref: FM Test Circuit; SEEK set to 1, HDDIS and BWDIS set to 1, measure: - Input at VFMLIMIN: desired 10.7MHz, CW - output at VFMSD FSSDMIN Field Strength Station Detector Minimum Threshold VFMLIMIN level at which VFMSD = 2.5V; FSS4-0 set to 00000 dB µV FSSDMAX Field Strength Station Detector Maximum Threshold VFMLIMIN level at which VFMSD = 2.5V; FSS4-0 set to 11111 dB µV ELECTRICAL CHARACTERISTICS (Continued) |
类似零件编号 - TDA7421N |
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类似说明 - TDA7421N |
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