TDA7479 Datasheet, PDF (3/7 Pages) STMicroelectronics – SINGLE CHIP RDS DEMODULATOR FILTER

TDA7479
THERMAL DATA
Symbol
R_{th j-amb}
Description
Thermal Resistance Junction-Ambient
DIP20
Max
100
SO20
200
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 5V, unless otherwise specified).
Unit
°C/W
Symbol
V_S
I_S
Parameter
Supply voltage
Supply current
Test Condition
FILTER
f_C
BW
G
A
R_I
R_L
S/N
V_IN
V_REF
Center frequency
3dB Bandwidth
Gain
Attenuation
Input impedance of MPX
Load impedance on FILOUT
Signal to noise ratio
MPX input signal
Reference
f = 57kHz
∆f ± 4kHz
f = 38kHz
f = 67kHz
VIN = 3mVRMS
f = 19kHz; T3 ≤ 40dB(1)
f = 57kHz (RDS+ ARI)
DEMODULATOR
Input pins (EXTRES, FSEL, TM)
Input pin (OSEL)
I_PD
Input Current
I_PU
Input Current
V_IH
Input voltage high
V_IN = 5V (pull-down input)
VIN = 0V (pull-up input)
VIL
Input voltage low
Output pins (RDCL, RDDA, ARI, QUAL, T57)
V_OH
Ouput voltage high
V_OL
Output voltage low
I_L = 0.5mA
I_L = 0.5mA
OSCILLATOR
VCLL Input level OSCIN pin
VCLH Input level OSCIN pin
Amplitude OSCOUT
V_PP
Amplitude OSCIN
(for external drive)
OSEL = open circuit
OSEL = open circuit
OSEL = open circuit
OSEL = GND,
f = 4.332MHz
OSEL = GND,
f = 8.664MHz
OSEL = GND,
f = 17.328MHz
Min. Typ. Max. Unit
4.5
5
5.5
V
7.5 11.0 mA
56.5 57 57.5 kHz
2.5
3
3.5 kHz
18
20
22
dB
18
22
dB
50
60
dB
35
45
dB
80
120 150
KΩ
1
MΩ
30
40
dB
V_S/2
1000
50
mV_RMS
mV_RMS
V
all with internal pull down resistor
with internal pull up resistor
15
30
µA
-25
-10
µA
0.7 ⋅ V_S 0.8 ⋅ V_S
V
0.2 ⋅ VS 0.3 ⋅ VS V
4
4.6
V
0.4
1
V
1
V
4
V
4.5
V
100
mVpp
120
mVpp
150
mVpp
(1) The 3rd harmonic (57kHz) must be less than -40dB with respect to the input signal plus gain.
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