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參數(shù)資料
| 型號(hào)： | TDA7421N |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁(yè)數(shù)： | 4/47頁(yè) |
| 文件大?。?/td> | 374K |
| 代理商： | TDA7421N |
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Electrical specifications
TDA7421N
IF1 VCC
IF1 supply voltage
7.5
10
V
IF1 ICC
IF1 supply current
AM mode
4.0
mA
FM mode
22.0
mA
IF2 VCC
IF2 supply voltage
7.5
10
V
IF2 ICC
IF2 supply current
AM mode
10.0
mA
FM mode
28.0
mA
OSC VCC
Oscillator supply voltage
7.5
10
V
OSC ICC
Oscillator supply current
AM mode
17.0
mA
FM mode
81.0
mA
Voltage controlled oscillator (VCO)
Ref: FM test circuit, measure Vosc with high impedance FET probe
fVCOmin
Minimum VCO frequency
Vtun = 0
Europe/USA
Japan
80.9
55
98.2
65.4
MHz
fVCOmax
Maximum VCO frequency
Vtun = VCC
Europe/USA
Japan
123.2
79.2
128
90
MHz
VOSC
Oscillator Amplitude
fOSC = 108.8MHz, Europe/USA
fOSC = 72.3MHz
Japan
110
dB
μV
C/N
Carrier to Noise
1 kHz offset
85
dBc/Hz
Reference Oscillator
Ref: AM test circuit, measure VXTAL with high impedance FET probe
fXTAL
Reference frequency
10.25
MHz
VXTAL
Oscillator amplitude
108
dB
μV
FM front-end electrical adjustments
Ref: FM test circuit, measure VANTADJ and VRFADJ referred to VPLLOUT
ANTADJ
MAX OFF
Maximum FM antenna filter
adjustment voltage offset
VPLLOUT = 2.5 V,
ANA3-0 set to 1111
21
25
27
%
ANTADJ
STEP OFF
FM antenna filter adjustment
voltage offset step
VPLLOUT = 2.5 V,
ANA3-0 set to 1001
2.8
4.4
%
RFADJ
MAX OFF
Maximum FM RF filter
adjustment voltage offset
VPLLOUT = 2.5 V,
RFA3-0 set to 1111
21
25
27
%
RFADJ
STEP OFF
FM RF filter adjustment voltage
offset step
VPLLOUT = 2.5 V,
RFA3-0 set to 1001
2.8
3.6
4.4
%
FM mixer
Ref: FM test circuit, measure input at VMIXFMIN, output at VMIXOUT
RIN,MIX
Single-ended input resistance
(pin 3, pin4)
12
Ω
GMIX
Conversion gain
fIN = 98.1 MHz
21.8
dB
IP3MIX
3rd order intermodulation
distortion intercept point
fd = 98.1 MHz; fu1 = 98.2 MHz;
fu2 = 98.3 MHz;
108
dB
μV
Table 7.
Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
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