TDA7406T Datasheet, PDF (24/49 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

TDA7406T
NOISE BLANKER PART
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
Table 3. ELECTRICAL CHARACTERISTICS
All parameters measured in FM mode if not otherwise specified.
Symbol
Parameter
Test conditions
V_{TR Trigger Threshold} ¹⁾
meas.with
111
V_PEAK=0.9V
110
101
100
011
010
001
000
V_TRNOISE noise controlled
Trigger Threshold
meas.with
00
V_PEAK=1.5V
01
10
11
V_RECT Rectifier Voltage
V_MPX=0mV
V_MPX=50mV, f=150kHz
V_MPX=200mV, f=150kHz
V_RECTDEV Deviation dependent
Rectifier Voltage
meas.with
11
V_MPX=500mV
10
(75kHz dev.)
01
00
V_RECTFS Fieldstrength
controlled Rectifier
Voltage
meas.with
11
V_MPX=0mV,
10
V_LEVEL<< V_SBL
01
(fully mono)
00
Min.
Typ.
30
Max.
35
40
45
50
55
60
65
260
220
180
140
0.5
0.9
1.3
1.5
1.7
2.1
2
2.5
2.9
0.5 0.9 (off) 1.3
0.9
1.2
1.5
1.7
2.0
2.3
2.5
2.8
3.1
0.5 0.9 (off) 1.3
0.9
1.4
1.5
1.7
1.9
2.3
2.1
2.4
3.1
Unit
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
mV_OP
V
V
V
V_OP
V_OP
V_OP
V_OP
V
V
V
V
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