STV2247H(2009) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STV2247H Datasheet PDF : 86 Pages
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STV224X, STV228X, STV223X - ELECTRICAL CHARACTERISTICS
4.4.12 AM Demodulator
Symbol
AFOUT
AMlowco
AMhighco
AMthd
AMs/n
AMsvr
Parameter
AM Audio Output Amplitude at AM/
FMOUT Pin
Low Cut-off Frequency
High Cut-off Frequency
Total Harmonic Distortion
Signal/Noise Ratio
Supply Voltage Rejection
Test Conditions
54% modulation
-3 dB compared AFout
-3 dB compared AFout
54% modulation
Weighted according to CCIR468-4
Quasi-Peak
See Note 4
Min. Typ. Max. Unit
400 500 630 mVRMS
40 Hz
30
kHz
2
%
55
dB
20
dB
4.4.13 SIF Output (AM/FM or Sound Subcarriers Output)
Symbol
SIFout
) SIFbw
t(s SIF dcout
Parameter
Output Level
Bandwidth
DC Output Level
SIFres Residual Carrier
duc SIFcur Sink Output Current
Test Conditions
Sound subcarriers
Sound subcarriers
Fundamental wave (38.9 MHz) and
harmonics
AM or FM demod. output selected
Sound subcarriers output selected
ro 4.4.14 SAW Filter Switch Output (TQFP64 only)
P Symbol
SAW low
te SAWcur
le SAW high
Parameter
Low Output Voltage
Maximum allowed Current
High Output Voltage
Test Conditions
ISINK = 2 mA
ISOURCE = 2 mA
o 4.4.15 External Audio Input
bs Symbol
O RIN
- VIDC
AFIN
Parameter
Input Resistance
DC Input Voltage
maximum Audio Input Signal
Test Conditions
t(s) 4.4.16 Main Audio Output
(See Figure 17 on page 42 and Figure 18 on page 42)
uc Symbol
d AMax
ro AMin
P ASTEP
te DCSH
leVODC
o AFDIFF
bs ROUT
Parameter
Maximum Attenuation (Audio Out/
AM-FM Out)
Minimum Attenuation (Audio Out/
AM-FM Out)
Step Resolution
DC Output Shift
DC Output Level
Audio Amplitude difference
between sources
Output Resistance
Test Conditions
Register 05hex, data = 7Fhex
VIN = 1 VRMS, f = 1 kHz,
Register 05hex, data = 00hex
reg 05, d7 = 0
From max. volume to min. volume
f = 1 kHz, fM = ±27 kHz,
Ext. Audio Input = 500 mVRMS
Min.
7.5
Typ.
150
4
Max.
Unit
mVRMS
MHz
V
0.4
mVRMS
0.5
1.5
mA
Min. Typ Max. Unit
0.4
V
2
mA
4
V
Min.
70
2
Typ. Max.
100 130
2.4
Unit
kΩ
V
VRMS
Min. Typ. Max. Unit
78
dB
-1
0
1
dB
0.7
dB
50 mV
4
V
2
dB
110
Ω
BWO Output Bandwidth
1
MHz
THD_AM Total Harmonic Distortion
VIN = 1 VRMS, f = 1 kHz
0.1 0.3 %
30/86
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