TDA7402 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7402' PDF : 69 Pages View PDF
Stereo decoder part
TDA7402
4.3.4 ACI (adjacent channel interference)
α114
=
----V-----O----(--s----i-g----n----a---l--)---(--a----t--1---k---H-----z---)----
V O ( s p u r i o u s ) ( a t 4 kHz )
;fs
=
110kHz – (3 ⋅ 38kHz)
α190
=
----V-----O----(--s----i-g----n----a---l--)---(--a----t--1---k---H-----z---)----
V O ( s p u r i o u s ) ( a t 4 kHz )
;fs
=
186kHz – (5 ⋅ 38kHz)
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal
(fS = 110kHz or 186kHz, unmodulated).
) 4.4
Noise blanker part
) - Obsolete Product(s 4.4.1
Noise blanker part features
● AM and FM mode
● internal 2nd order 140kHz high-pass filter for MPX path
● internal rectifier and filters for AM-IF path
● programmable trigger thresholds
● trigger threshold dependent on high frequency noise with programmable gain
● additional circuits for deviation and fieldstrength dependent trigger adjustment
● 4 selectable pulse suppression times for each mode
● programmable noise rectifier charge/discharge current
All parameters measured in FM mode if not otherwise specified.
ct(s Table 8. Noise blanker electrical characteristics
du Symbol
Parameter
Test condition
ro 111
P 110
te 101
bsole VTR Trigger threshold (1)
meas.with
VPEAK=0.9V
100
011
O 010
Min.
Typ.
30
35
40
45
50
55
Max.
Unit
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
001
60
mVOP
000
65
mVOP
00
260
mVOP
Noise controlled
VTRNOISE Trigger threshold
meas.with
VPEAK=1.5V
01
220
mVOP
10
180
mVOP
11
140
mVOP
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