TDA7405_04 STMICROELECTRONICS [STMicroelectronics], TDA7405_04 Datasheet - Page 26

• Manufacturer Part Number: TDA7405_04
• Description: EQUALIZER CARRADIO SIGNAL PROCESSOR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 8. ELECTRICAL CHARACTERISTICS
All parameters mesured in FM mode if not otherwise specified.
TDA7405
Note 4. ACI ( Adjacent Channel Interference )
measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal (f
modulated).
8
8.1 Features:
26/57
Symbol
V
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
TRNOISE
V
TR
NOISE BLANKER PART
Trigger Threshold
noise controlled
Trigger Threshold
Parameter
114
190
5)
=
=
--------------------------------------------------------------- - ƒ
V
--------------------------------------------------------------- - ƒ
V
V
V
o
o
o
o
spu rio us at4kH z
spu rio us at4kH z
sign al a t1 kHz
sign al a t1 kHz
meas.with
V
meas.with
V
PEAK
PEAK
=0.9V
=1.5V
Test conditions
;
;
s
s
=
=
110kH z
186kH z
110
101
100
011
010
001
000
111
00
01
10
11
–
–
3 38 kHz
5 38 kHz
Min.
s
= 110kHz or 186kHz, un-
Typ.
260
220
180
140
30
35
40
45
50
55
60
65
Max.
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
Unit
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP
OP