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STV224X 数据表(PDF) 30 Page - STMicroelectronics

部件名 STV224X
功能描述  I짼C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR
PDF  86 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STV224X 数据表(HTML) 30 Page - STMicroelectronics

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STV224XH/228XH/223XH - ELECTRICAL CHARACTERISTICS
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4.4.12 AM Demodulator
4.4.13 SIF Output (AM/FM or Sound Subcarriers Output)
4.4.14 SAW Filter Switch Output (TQFP64 only)
4.4.15 External Audio Input
4.4.16 Main Audio Output
(See Figure 17 on page 42 and Figure 18 on page 42)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
AFOUT
AM Audio Output Amplitude at AM/
FMOUT Pin
54% modulation
400
500
630
mVRMS
AMlowco
Low Cut-off Frequency
-3 dB compared AFout
40
Hz
AMhighco High Cut-off Frequency
-3 dB compared AFout
30
kHz
AMthd
Total Harmonic Distortion
54% modulation
2
%
AMs/n
Signal/Noise Ratio
Weighted according to CCIR468-4
Quasi-Peak
55
dB
AMsvr
Supply Voltage Rejection
See Note 4
20
dB
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SIFout
Output Level
Sound subcarriers
150
mVRMS
SIFbw
Bandwidth
Sound subcarriers
7.5
MHz
SIF dcout
DC Output Level
4
V
SIFres
Residual Carrier
Fundamental wave (38.9 MHz) and
harmonics
0.4
mVRMS
SIFcur
Sink Output Current
AM or FM demod. output selected
Sound subcarriers output selected
0.5
1.5
mA
Symbol
Parameter
Test Conditions
Min.
Typ
Max.
Unit
SAW low
Low Output Voltage
ISINK = 2 mA
0.4
V
SAWcur
Maximum allowed Current
2
mA
SAW high
High Output Voltage
ISOURCE = 2 mA
4
V
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
RIN
Input Resistance
70
100
130
k
W
VIDC
DC Input Voltage
2.4
V
AFIN
maximum Audio Input Signal
2
VRMS
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
AMax
Maximum Attenuation (Audio Out/
AM-FM Out)
Register 05hex, data = 7Fhex
78
dB
AMin
Minimum Attenuation (Audio Out/
AM-FM Out)
VIN = 1 VRMS, f = 1 kHz,
Register 05hex, data = 00hex
-101
dB
ASTEP
Step Resolution
reg 05, d7 = 0
0.7
dB
DCSH
DC Output Shift
From max. volume to min. volume
50
mV
VODC
DC Output Level
4
V
AFDIFF
Audio Amplitude difference
between sources
f = 1 kHz, fM = ±27 kHz,
Ext. Audio Input = 500 mVRMS
2dB
ROUT
Output Resistance
110
W
BWO
Output Bandwidth
1
MHz
THD_AM
Total Harmonic Distortion
VIN = 1 VRMS, f = 1 kHz
0.1
0.3
%



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