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参数资料
| 型号： | TDA7421N |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封装： | TQFP-64 |
| 文件页数： | 5/47页 |
| 文件大小： | 374K |
| 代理商： | TDA7421N |
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TDA7421N
Electrical specifications
CP1MIX
1dB compression point
fIN = 98.1 MHz
90
dB
μV
CAdj1
Value of the minimum adjusting
capacitance step
T1A3-0 set to 1000
0.38
pF
FM AGC
Ref: FM test circuit, measure input at VFMRFAGCIN and VFMIFAGCIN, output at VFMAGCOUT
VRFAGCSTA
RT
Open loop RF AGC starting
point
fRFAGCIN = 98.1 MHz
Value of VFMRFAGCIN at which
VFMAGCOUT = 4 V
80
dB
μV
RIN,RFAGC Input resistance
20
K
Ω
VIFAGCTART Open loop IF AGC starting point
fIFAGCIN = 10.7 MHz
Value of VFMIFAGCIN at which
VFMAGCOUT = 4 V
FAGC2-0 set to 111
77
dB
μV
RIN,IFAGC
Input resistance
20
K
Ω
ROUT,FMAGC Output resistance
10
K
Ω
FM IF amplifier 1
Ref: FM test circuit, measure input at VFMAMP1IN, output at VFMAMP1OUT
RIN,AMP1
Input resistance
330
Ω
ROUT,AMP1 Output resistance
330
Ω
GAMP1
Typical gain
fIN = 10.7 MHz
18.5
dB
IP3AMP1
3rd order intermodulation
distortion intercept point
fd = 10.7 MHz; fu1= 10.8 MHz;
fu2= 10.9 MHz;
FBH3-0 set to 0100
dB
μV
CP1AMP1
1dB compression point
fIN = 10.7 MHz;
FBH3-0 set to 0100
dB
μV
FM IF amplifier 2
Ref: FM test circuit, measure input at VFMAMP2IN, output at VFMAMP2OUT
RIN,AMP2
Input resistance
f = 10.7 MHz
330
Ω
ROUT,AMP2 Output resistance
f = 10.7 MHz
330
Ω
GMIN,AMP2 Minimum gain
fIN = 10.7MHz, FBL1-0 set to 01
6
dB
GMAX,AMP2 Maximum gain
fIN = 10.7MHz, FBL1-0 set to 00
10
dB
IP3AMP2
3rd order intermodulation
distortion intercept point
fd = 10.7 MHz; fu1= 10.8 MHz;
fu2= 10.9 MHz;
FBL3-0 set to 0100
dB
μV
CP1AMP2
1dB compression point
fIN = 10.7 MHz;
FBL3-0 set to 0100
dB
μV
Table 7.
Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
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