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E-TDA7478AD View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
E-TDA7478AD SINGLE CHIP RDS DEMODULATOR ST-Microelectronics
STMicroelectronics ST-Microelectronics
E-TDA7478AD Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Table 4. Absolute Maximum Ratings
Symbol
VS
Top
Tstg
Parameter
Supply Voltage
Operating Temperature Range
Storage Temperature
TDA7478
Value
Unit
-0.3 to 7
V
-40 to 85
°C
-55 to 150
°C
Table 5. Electrical Characteristcs
(Tamb = 25°C, VS = 5V, unless otherwise specified)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
VS Supply voltage
4.5
5
5.5
V
IS
Supply current
7.5 12.0 mA
FILTER
fC
Center frequency
56.6
57
57.4 kHz
BW 3dB Bandwidth
2.5
3
3.5 kHz
G Gain
f = 57kHz
17
20
23
dB
A Attenuation
f ± 4kHz
22
dB
f = 38kHz
60
dB
f = 67kHz
45
dB
RI Input impedance of MPX
120
K
RL Load impedance on FILOUT
1
M
S/N Signal to noise ratio
VIN = 3mVRMS
30
40
dB
VIN MPX input signal
f = 19kHz; T3 40dB(1)
f = 57kHz (RDS)
1000 mVRMS
50 mVRMS
SRDS RDS Detection Sensitivity
1
mVrms
SARI ARI Detection Sensitivity
3
mVrms
VREF Reference
VS/2
V
DEMODULATOR
Input pins (EXTRES, FSEL, TM)
Input pin (OSEL)
all with internal pull down resistor
with internal pull up resistor
IPD Input Current
VIN = 5V (pull-down input)
15
30
µA
IPU Input Current
VIN = 0V (pull-up input)
-25
-10
µA
VIH Input voltage high
0.7 · VS 0.8 · VS
V
VIL Input voltage low
0.2 · VS 0.3 · VS V
Output pins (RDCL, RDDA, QUAL, T57)
VOH Ouput voltage high
IL = 0.5mA
4
4.6
V
VOL Output voltage low
IL = 0.5mA
0.4
1
V
OSCILLATOR
VCLL Input level OSCIN pin
OSEL = open circuit
1
V
VCLH Input level OSCIN pin
OSEL = open circuit
4
V
Amplitude OSCOUT
OSEL = open circuit
4.5
V
VPP Amplitude OSCIN
(for external drive)
OSEL = GND, f = 4.332MHz
OSEL = GND, f = 8.664MHz
100
mVpp
120
mVpp
(1) The 3rd harmonic (57kHz) must be less than -40dB with respect to the input signal plus gain.
3/8
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