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參數(shù)資料
| 型號(hào)： | TDA7407TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, LQFP-44 |
| 文件頁數(shù)： | 9/46頁 |
| 文件大?。?/td> | 692K |
| 代理商： | TDA7407TR |
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Obsolete
Product(s)
- Obsolete
Product(s)
TDA7407
Noise blanker part
4
Noise blanker part
●
internal 2nd order 140kHz high pass filter
●
programmable trigger threshold
●
trigger threshold dependent on high frequency noise with programmable gain
●
additional circuits for deviation and fieldstrength dependent trigger adjustment
●
very low offset current during hold time due to opamps wMOS inputs
●
four selectable pulse suppression times
●
programmable noise rectifier charge/discharge current
Table 7.
Noise blanker electrical characteristics
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VTR
Trigger threshold (1) (2)
meas. with VPEAK
= 0.9V
NBT = 111
(10)
30
(10)
mVOP
NBT = 110
(10)
35
(10)
mVOP
NBT = 101
(10)
40
(10)
mVOP
NBT = 100
(10)
45
(10)
mVOP
NBT = 011
(10)
50
(10)
mVOP
NBT = 010
(10)
55
(10)
mVOP
NBT = 001
(10)
60
(10)
mVOP
NBT = 000
(10)
65
(10)
mVOP
VTRNOISE
Noise controlled
trigger threshold (3)
meas. with VPEAK
= 1.5V
NCT = 00
(10)
260
(10)
mVOP
NCT = 01
(10)
220
(10)
mVOP
NCT = 10
(10)
180
(10)
mVOP
NCT = 11
(10)
140
(10)
mVOP
VRECT
Rectifier voltage
VMPX = 0mV
NRD (7) = 00
0.5
0.9
1.3
V
VMPX = 50mV; f = 150KHz
1.5
1.7
2.1
V
VMPX = 200mV; f = 150KHz
2.2
2.5
2.9
V
VRECT DEV
Deviation dependent
rectifier voltage (4)
means. with
VMPX = 800mV
(75KHz dev.)
OVD = 11
0.5
0.9(off)
1.3
VOP
OVD = 10
0.9
1.2
1.5
VOP
OVD = 01
1.7
2.0
2.3
VOP
OVD = 00
2.5
2.8
3.1
VOP
VRECT FS
Fieldstrength
controlled rectifier
voltage (5)
means. with
VMPX = 0mV
VLEVEL << VSBL
(fully mono)
FSC = 11
0.5
0.9(off)
1.3
V
FSC = 10
0.9
1.4
1.5
V
FSC = 01
1.7
1.9
2.3
V
FSC = 00
2.1
2.4
3.1
V
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