参数资料
型号: TDA7407
厂商: STMICROELECTRONICS
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP44
封装: 10 X 10 MM, 1.40 MM HEIGHT, LQFP-44
文件页数: 9/46页
文件大小: 692K
代理商: TDA7407
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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