E-TDA7421N 查看數據表（PDF） - STMicroelectronics
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E-TDA7421N Datasheet PDF : 47 Pages
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Electrical specifications
TDA7421N
Table 7. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
IF1 VCC IF1 supply voltage
IF1 ICC IF1 supply current
AM mode
FM mode
IF2 VCC IF2 supply voltage
IF2 ICC IF2 supply current
AM mode
FM mode
OSC VCC Oscillator supply voltage
OSC ICC Oscillator supply current
AM mode
FM mode
Voltage controlled oscillator (VCO)
Ref: FM test circuit, measure Vosc with high impedance FET probe
fVCOmin Minimum VCO frequency
Vtun = 0
Europe/USA
Japan
fVCOmax Maximum VCO frequency
Vtun = VCC
Europe/USA
Japan
VOSC
C/N
Oscillator Amplitude
Carrier to Noise
fOSC = 108.8MHz, Europe/USA
fOSC = 72.3MHz
Japan
1 kHz offset
Reference Oscillator
Ref: AM test circuit, measure VXTAL with high impedance FET probe
fXTAL Reference frequency
VXTAL Oscillator amplitude
FM front-end electrical adjustments
Ref: FM test circuit, measure VANTADJ and VRFADJ referred to VPLLOUT
ANTADJ Maximum FM antenna filter
MAX OFF adjustment voltage offset
VPLLOUT = 2.5 V,
ANA3-0 set to 1111
ANTADJ FM antenna filter adjustment
STEP OFF voltage offset step
VPLLOUT = 2.5 V,
ANA3-0 set to 1001
RFADJ Maximum FM RF filter
MAX OFF adjustment voltage offset
VPLLOUT = 2.5 V,
RFA3-0 set to 1111
RFADJ FM RF filter adjustment voltage VPLLOUT = 2.5 V,
STEP OFF offset step
RFA3-0 set to 1001
FM mixer
Ref: FM test circuit, measure input at VMIXFMIN, output at VMIXOUT
RIN,MIX
Single-ended input resistance
(pin 3, pin4)
GMIX
IP3MIX
Conversion gain
3rd order intermodulation
distortion intercept point
fIN = 98.1 MHz
fd = 98.1 MHz; fu1 = 98.2 MHz;
fu2 = 98.3 MHz;
7.5
7.5
7.5
123.2
79.2
21
2.8
21
2.8
Typ.
4.0
22.0
10.0
28.0
17.0
81.0
80.9
55
128
90
110
85
10.25
108
25
3.6
25
3.6
12
21.8
108
Max. Unit
10
V
mA
mA
10
V
mA
mA
10
V
mA
mA
98.2
65.4
MHz
MHz
dBμV
dBc/Hz
MHz
dBμV
27
%
4.4
%
27
%
4.4
%
Ω
dB
dBμV
12/47
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