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參數(shù)資料
| 型號(hào)： | TDA7421N |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS |
| 中文描述： | AM / FM調(diào)諧的汽車收音機(jī)及音響應(yīng)用 |
| 文件頁(yè)數(shù)： | 12/38頁(yè) |
| 文件大?。?/td> | 337K |
| 代理商： | TDA7421N |
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TDA7421N
12/38
Detuning Station Detector
Ref: FM Test Circuit; SEEK set to 1, HDDIS and SMDIS set to 1, measure:
- Input at V
FMLIMIN
, CW;
- output at V
FMSD
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DSD
Detuning Station Detector
Threshold
frequency shift from 10.7MHz at
which V
FMSD
= 2.5V
±28
KHz
Adjacent Channel Station Detector
Ref: FM Test Circuit; SEEK set to 1, HDDIS and SMDIS set to 1, measure:
- Input at V
FMLIMIN
: desired 10.7MHz, 95dB
μ
V CW; undesired 10.8MHz CW
- output at V
FMSD
ACSD
MAX
Adjacent Channel Detector
Maximum Sensitivity Threshold
amplitude of undesired signal at
which V
FMSD
= 2.5V, HDM4-0
set to 11111
92.5
dB
μ
V
ACSD
MIN
Adjacent Channel Detector
Minimum Sensitivity Threshold
amplitude of undesired signal at
which V
FMSD
= 2.5V, HDM4-0
set to 00000
94.9
dB
μ
V
AM Mixer 1
Ref: AM Test Circuit, measure input at V
MIX1AMIN
, output at V
MIXOUT
R
IN,MIX1
Input Resistance
1.2
K
G
MIX1
Conversion Gain
f
IN
= 1MHz
7.6
dB
IP3
MIX1
3rd Order Intermodulation
Distortion Intercept Point
f
d
= 1MHz; f
u1
= 1.1MHz;
f
u2
= 1.2MHz
131
dB
μ
V
CP1
MIX1
1dB Compression Point
f
IN
= 1MHz
110
dB
μ
V
CAdj1
Value of the minimum adjusting
capacitance step
T1A3-0 set to 1000
0.38
pF
AM Wide & Narrow AGC
Ref: AM Test Circuit; measure input at V
MIX1AMIN
and V
MIX2AMIN
, output at V
AMAGC1AMP
and V
AMAGC1PIN
V
WAGCMIN
Open Loop WIDE AGC
Minimum Starting Point
f
WAGCIN
= 999kHz, AAGW1-0
set to 11; V
MIX1AMIN
at which
V
AMAGC1AMP
= 2.5V
95
dB
μ
V
V
WAGCMAX
Open Loop WIDE AGC
Maximum Starting Point
f
WAGCIN
= 999kHz, AAGW1-0
set to 00; V
MIX1AMIN
at which
V
AMAGC1AMP
= 2.5V
101
dB
μ
V
V
NAGCMIN
Open Loop NARROW AGC
Minimum Starting Point
f
NAGCIN
= 10.7MHz, AAGN1-0
set to 11; V
MIX2AMIN
at which
V
AMAGC1AMP
= 2.5V
81
dB
μ
V
V
NAGCMAX
Open Loop NARROW AGC
Maximum Starting Point
f
NAGCIN
= 10.7MHz, AAGN3-0
set to 00; V
MIX2AMIN
at which
V
AMAGC1AMP
= 2.5V
87
dB
μ
V
R
OUTAMAGC1
Output Resistance
23.3
K
I
AMAGC1PIN
Maximum Antenna Attenuation
Diode Current
f
WAGCIN
= 999kHz; V
MIX1AMIN
=
120dB
μ
V; AAGW1-0 set to 00
1.4
mA
ELECTRICAL CHARACTERISTICS
(Continued)
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