TDA7402_00 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TDA7402_00 Datasheet PDF : 59 Pages
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TDA7402
2.3.4 ACI ( Adjacent Channel Interference )
α114 = V----VO-----O(--s--(--ps---u-i--g-r---ni--o-a--u--l--)s--(--)-a--(--ta--1--t--k4---H-k---H-z---)-z--)-;fs = 110k Hz – (3 ⋅ 38kH z)
α190 = V----VO-----O(--s--(--ps---u-i--g-r---ni--o-a--u--l--)s--(--)-a--(--ta--1--t--k4---H-k---H-z---)-z--)-;fs = 186k Hz – (5 ⋅ 38kH z)
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal ( fS = 110kHz or 186kHz, un-
modulated).
2.4 NOISE BLANKER PART
2.4.1 Features:
s AM and FM mode
s internal 2nd order 140kHz high-pass filter for MPX path
s internal rectifier and filters for AM-IF path
s programmable trigger thresholds
s trigger threshold dependent on high frequency noise with programmable gain
s additional circuits for deviation- and fieldstrength-dependent trigger adjustment
s 4 selectable pulse suppression times for each mode
s programmable noise rectifier charge/discharge current
2.4.2 ELECTRICAL CHARACTERISTICS
All parameters measured in FM mode if not otherwise specified.
Symbol
Parameter
Test Condition
VTR Trigger Threshold 1)
meas.with
111
VPEAK=0.9V
110
101
100
011
010
001
000
VTRNOISE noise controlled
Trigger Threshold
meas.with
00
VPEAK=1.5V
01
10
11
VRECT Rectifier Voltage
VMPX=0mV
VMPX=50mV, f=150kHz
VMPX=200mV, f=150kHz
Min.
Typ.
30
35
40
45
50
55
60
65
260
220
180
140
0.9
1.7
3.5
Max.
Unit
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
V
V
V
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