OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

TDA7403DTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
STEREOBLEND and HIGHCUT CONTROL
VHCH
min
Min.Voltage for NO Highcut 42 %REF5V
VHCH
max
Max. Voltage for NO Highcut 66 %REF5V
VHCH
step
Step Resolution 8.4 %REF5V
VHCL
min
Min. Voltage for FULL High cut 17 %VHCH
VHCL
max
Max. Voltage for FULL High cut 33 %VHCH
Carrier and harmonic suppression at the output
α
19 Pilot Signal f = 19KHz 50 dB
α
38 Subcarrier f = 38KHz 75 dB
α
57 Subcarrier f = 57KHz 62 dB
α
76 Subcarrier f = 76KHz 90 dB
Intermodulation (Note1)
α
2 Pilot Signal f
mod
= 10KHz; f
spur
= 1KHz; 65 dB
α
3f
mod
= 13KHz; f
spur
= 1KHz; 75 dB
Traffic Radio (Note 2)
α
57 Signal f = 57KHz 70 dB
SCA - Subsidiary Communications Authorization (Note 3)
α
67 Signal f = 67KHz 75 dB
ACI - Adjacent Channel Interference (Note 4)
α
114 Signal f = 114KHz 95 dB
α
190 Signal f = 190KHz 84 dB
Notes to the characteristics:
1. Intermodulation Suppression: measured with: 91% pilot signal; fm = 10kHz or 13kHz.
2. Traffic Radio (V.F.) Suppression: measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (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).
TDA7403
10/25
Obsolete Product(s) - Obsolete Product(s)
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
TR
Trigger Threshold
0) 1)
meas. with V
PEAK
= 0.9V NBT = 111 30 mV
OP
NBT = 110 35 mV
OP
NBT = 101 40 mV
OP
NBT = 100 45 mV
OP
NBT = 011 50 mV
OP
NBT = 010 55 mV
OP
NBT = 001 60 mV
OP
NBT = 000 65 mV
OP
V
TRNOISE
Noise Controlled Trigger
Threshold
2)
meas. with V
PEAK
= 1.5V NCT = 00 260 mV
OP
NCT = 01 220 mV
OP
NCT = 10 180 mV
OP
NCT = 11 140 mV
OP
V
RECT
Rectifier Voltage V
MPX
= 0mV 0.9 V
V
MPX
= 50mV; f = 150KHz 1.7 V
V
MPX
= 100mV; f = 150KHz 2.5 V
V
RECT DEV
deviation dependent
rectifier Voltage
3)
means. with
V
MPX
= 800mV
(75KHz dev.)
OVD = 11 0.9(off) V
OP
OVD = 10 1.2 V
OP
OVD = 01 2.0 V
OP
OVD = 00 2.8 V
OP
V
RECT FS
Fieldstrength Controlled
Rectifier Voltage
4)
means. with
V
MPX
= 0mV
V
LEVEL
<< V
SBL
(fully mono)
FSC = 11 0.9(off) V
FSC = 10 1.3 V
FSC = 01 1.8 V
FSC = 00 2.3 V
0) All thresholds are measured using a pulse with T
R
= 2
µ
s, T
HIGH
= 2
µ
s and T
F
= 10
µ
s.
1) NBT represents the Noiseblanker-Byte bits D2; D0 for the noise blanker trigger threshold
2) NAT represents the Noiseblanker-Byte bit pair D4,D3 for the noise controlled trigger adjustment
3) OVD represents the Noiseblanker-Byte bit pair D7,D6 for the over deviation detector
4) FSC represents the Fieldstrength-Byte bit pair D1,D0 for the fieldstrength control
V
OP
V
IN
DC
T
R
T
HIGH
T
F
Time
D97AU636
NOISE BLANKER PART
internal 2nd order 140kHz high pass filter
programmable trigger threshold
additional circuits for trigger adjustment (devia-
tion, field-strenght)
very low offset current during hold time
four selectable pulse suppression times
TDA7403
11/25
Obsolete Product(s) - Obsolete Product(s)
65mV
30mV
8 STEPS
NOISE CONTROLLED
TRIG. THRESHOLD
MIN. TRIG. THRESHOLD
260mV(00)
220mV(01)
180mV(10)
140mV(11)
0.9V
VTH
1.5V
V
PEAK(V)
D97AU648
Figure 10. Trigger Threshold vs. V
PEAK
V
PEAK
(V
OP
)
D97AU649
20
DEVIATION(KHz)
0.9
1.2
2.0
2.8
DETECTOR OFF (11)
32.5 45 75
10
01
00
Figure 11. Deviation Controlled Trigger Ad-
justment
2.3V(00)
0.9V
V
PEAK
E'
D98AU863
1.8V(01)
1.3V(10)
MONO STEREO
noisy signal good signal
ATC_SB OFF (11)
NOISE
»3V
Figure 12. Fieldstrength Controlled Trigger
Adjustment
INGAIN
3.5 ... 11dB
STEP 2.5dB
INFILTER
LP 80KHz
4.th ORDER
DEMODULATOR
- PLOT CANC
- ROLL-OFF COMP.
- LP 25KHz
PLL +
PILOT-DET.
F19
NOISE BLANKER
F38
STEREO
HOLDN
SB CONTROL
DEEMPHASIS
+ HIGHCUT
t=50 or 75µs
REF 5V
VSBL
LEVEL INTERN
HC
CONTROL
VHCCH
VHCCL
D
A
LEVEL INPUT
LP 2.2KHZ
1.th ORDER
LEVEL
FM_L
FM_R
MPX
100K
D98AU952
GAIN 0..10dB
Figure 13. Block diagram of the stereo decoder
TDA7403
12/25
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

TDA7403DTR

Mfr. #:
Buy TDA7403DTR
Manufacturer:
STMicroelectronics
Description:
Audio DSPs Basic Signal Process
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet