TDA7460NDTR(2009) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TDA7460NDTR Datasheet PDF : 49 Pages
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Stereo decoder part
TDA7460ND
5.3
Noise blanker part
● Internal 2nd order 140 kHz high pass filter
● Programmable trigger threshold
● Additional circuits for trigger adjustment (deviation, field-strenght)
● Very low offset current during hold time
● Four selectable pulse suppression times
Table 9. Noise blanker electrical characteristics
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
NBT = 111
30
mVOP
) NBT = 110
35
mVOP
t(s NBT = 101
40
mVOP
duc VTR Trigger threshold (1), (2)
meas. with VPEAK = NBT = 100
0.9 V
NBT = 011
45
50
mVOP
mVOP
ro NBT = 010
55
mVOP
te P NBT = 001
60
mVOP
le NBT = 000
65
mVOP
oNCT = 00
260
mVOP
Obs VTRNOISE
Noise controlled trigger
threshold (3)
meas. with VPEAK =
1.5 V
NCT = 01
NCT = 10
220
180
mVOP
mVOP
) - NCT = 11
140
mVOP
t(sVMPX = 0 mV
0.5
0.9
1.3
V
uc VRECT Rectifier voltage
VMPX = 50 mV; f = 150 kHz
1.5
1.7
2.1
V
d VMPX = 100 mV; f = 150 kHz
2.2
2.5
2.9
V
ro OVD = 11 0.5 0.9(off) 1.3 VOP
lete P VRECT DEV
Deviation dependent rectifier
voltage (4)
means. with VMPX =
800 mV
(75 KHz dev.)
OVD = 10 0.9
OVD = 01 1.7
1.2
2.0
1.5
VOP
2.3
VOP
o OVD = 00 2.5
2.8
3.1
VOP
bs FSC = 11 0.5 0.9(off) 1.3
V
O means. with VMPX =
VRECT FS
Fieldstrength controlled
rectifier voltage (5)
0mV
FSC = 10 1.0
1.3
1.6
V
VLEVEL << VSBL(fully FSC = 01 1.5
1.8
2.1
V
mono)
FSC = 00 2.0
2.3
2.6
V
1. All thresholds are measured using a pulse with TR = 2 ms, THIGH = 2 ms and TF = 10 ms.
2. All thresholds are measured using a pulse with TR = 2 ms, THIGH = 2 ms and TF = 10 ms.
3. NAT represents the Noise blanker-Byte bit pair D4,D3 for the noise controlled trigger adjustment.
4. OVD represents the Noise blanker-Byte bit pair D7,D6 for the over deviation detector.
5. FSC represents the Fieldstrength-Byte bit pair D1,D0 for the fieldstrength control.
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