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TDA7421 Folha de dados(PDF) 7 Page - STMicroelectronics

Nome de Peças TDA7421
Descrição Electrónicos  AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS
PDF  38 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7421 Folha de dados(HTML) 7 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (continued)
FM IF Amplifier 1
Ref: FM Test Circuit, measure input at VFMAMP1IN, output at VFMAMP1OUT
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RIN,AMP1
Input Resistance
f = 10.7MHz
330
Ω
ROUT,AMP1
Output Resistance
f = 10.7MHz
330
Ω
GTYP,AMP1
Typical Gain
fIN = 10.7MHz, FBH3-0 set to
0100
16.5
17.5
18.5
dB
GMIN,AMP1
Minimum Gain
fIN = 10.7MHz, FBH3-0 set to
0001
14.5
15.5
16.5
dB
GMAX,AMP1
Maximum Gain
fIN = 10.7MHz, FBH3-0 set to
0000
18.5
19.5
20.5
dB
IP3AMP1
3rd Order Intermodulation
Distortion Intercept Point
fd = 10.7MHz; fu1= 10.8MHz; fu2=
10.9MHz, FBH3-0 set to 0100
109
dBu
CP1AMP1
1dB Compression Point
fIN = 10.7MHz; FBH3-0 set to
0100
96
dBu
FM IF Amplifier 2
Ref: FM Test Circuit, measure input at VFMAMP2IN, output at VFMAMP2OUT
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RIN,AMP2
Input Resistance
f = 10.7MHz
330
Ω
ROUT,AMP2
Output Resistance
f = 10.7MHz
330
Ω
GTYP,AMP2
Typical Gain
fIN = 10.7MHz, FBL3-0 set to 0100
5
6
7
dB
GMIN,AMP2
Minimum Gain
fIN = 10.7MHz, FBL3-0 set to 0001
3
4
5
dB
GMAX,AMP2
Maximum Gain
fIN = 10.7MHz, FBL3-0 set to 0000
7
8
9
dB
IP3AMP2
3rd Order Intermodulation
Distortion Intercept Point
fd = 10.7MHz; fu1= 10.8MHz; fu2=
10.9MHz, FBL3-0 set to 0100
122
dBu
CP1AMP2
1dB Compression Point
fIN = 10.7MHz; FBL3-0 set to 0100
110
dBu
FM Limiter, Field Strengh Meter and Demodulator
Ref: FM Test circuit, measure:
- Input at VFMLIMIN, fIN = 10.7MHz
- filtered FS Meter output at VSM,FILT
- shifted FS Meter output at VSM,SHIFT (FMADJ set to 0)
- demodulator adjustment output at VSM,SHIFT (FMADJ set to 1)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RIN,LIM
Limiter Input Resistance
330
Ω
GLIM
Limiter Gain
90
dB
LS
Limiting Sensitivity
23
dBu
SM1
Smeter 1 at VSM,FILT
VFMLIMIN = 42dBu
0.1
(1)
0.25
0.5
(1)
V
SM2
Smeter 2 at VSM,FILT
VFMLIMIN = 77dBu
2.4
(1)
2.75
3.1
(1)
V
SM3
Smeter 3 at VSM,FILT
VFMLIMIN = 102dBu
4.0
(1)
4.35
4.7
(1)
V
SMMINSHIFT
Smeter Minimum Shift Voltage at
VSM,SHIFT referred to VSM,FILT
VFMLIMIN = 70dBu, FSL4-0 set to
00000
0.25
0.3
0.35
V
SMMAXSHIFT
Smeter Maximum Shift Voltage
at VSM,SHIFT referred to VSM,FILT
VFMLIMIN = 70dBu, FSL4-0 set to
11111
1.55
1.8
2.05
V
GDEM
Demodulator Conversion Gain
VFMLIMIN > LS
2
mVRMS/
KHz
GDEMADJ
Demodulator Adjustment
Conversion Gain
VFMLIMIN > LS, measured at
VSMSHIFT, FMADJ set to 1
14
mVRMS/
KHz
NOTE1: Refer to Global application circuit; input at first Ceramic Filter in, FBH3-0 set to 0001, FBL3-0 set to 0001
TDA7421
7/38



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