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TDA7421N 数据表(PDF) 11 Page - STMicroelectronics

部件名 TDA7421N
功能描述  AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS
Download  38 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TDA7421N 数据表(HTML) 11 Page - STMicroelectronics

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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)


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