TDA7411 ST Microelectronics, TDA7411 Datasheet - Page 19

• Manufacturer Part Number: TDA7411
• Description: ADVANCED CAR SIGNAL PROCESSOR
• Manufacturer: ST Microelectronics

ELECTRICAL CHARACTERISTICS (continued)
carrier (f = 57kHz, fm = 23Hz AM, m = 60%)
3. SCA ( Subsidiary Communications Authorization ) measured with: 81% mono signal; 9% pilot signal;
fm = 1kHz; 10%SCA - subcarrier ( fs = 67kHz, unmodulated ).
4. ACI ( Adjacent Channel Interference ):
measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal( fs = 110kHz or 186kHz,
unmodulated).
NOISE BLANKER PART
Features:
– 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 with MOS inputs
– 4 selectable pulse suppression times
– programmable noise rectifier charge/discharge current
V
Symbol
V
TRNOISE
V
RECT
TR
Trigger Threshold
Noise Controlled Trigger
Threshold
Rectifier Voltage
Parameter
2)
114
114
0) 1)
67
57 V.W > F.
=
=
=
----------------------------------------------------- -
V
----------------------------------------------------- -
V
----------------------------------------------------- -
V
V
V
V
O sp uriou s at4k Hz
O sp uriou s at4k Hz
O spu riou s a t9k Hz
O s igna l a t1kHz
O s igna l a t1kHz
O si gna l at1 kHz
meas. with V
meas. with V
V
V
V
MPX
MPX
MPX
= 0mV
= 50mV; f = 150KHz
= 200mV; f = 150KHz
=
------------------------------------------------------------------------- -
V
PEAK
PEAK
Test Condition
O sp uriou s at1k Hz
V
= 0.9V
= 1.5V
O sig nal at1 kHz
; F
; F
; F
s
s
s
= 110kHz - (3 x 38kHz)
= 186kHz - (5 x 38kHz)
=(2 x 38kHz) - 67kHz
NRD
NBT = 111
NBT = 110
NBT = 101
NBT = 100
NBT = 011
NBT = 010
NBT = 001
NBT = 000
NCT = 00
NCT = 01
NCT = 10
NCT = 11
6)
23k Hz
= 00
Min.
0.5
1.5
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
Typ.
260
220
180
140
0.9
1.7
3.5
30
35
40
45
50
55
60
65
Max.
1.3
2.1
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
TDA7411
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
Unit
19/43
V
V
V
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP