TDA7338 Просмотр технического описания (PDF) - STMicroelectronics
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TDA7338 Datasheet PDF : 12 Pages
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TDA7338
3 ELECTRICAL CHARACTERISTCS
Table 4.
(VCC = 9V; modulation frequency: 1KHz; de-emphasis time: T = 50µs; nominal MPX input voltage:
VMPX = 1.5VPP; m 100% (75KHz deviation, fmod = 1KHz); RIN = 40.2kΩ, ROUT = 40.2kΩ;
Tamb = 27°C; CREF = 4.7µF; unless otherwise specified)
Symbol
VCC
ICC
VIN
VORMS
SVRR
VL/VR
Vo/Vi
RO
VO
α
THD
-S-----+-----N---
N
Parameter
Test Condition
Supply Voltage
Supply Current
MPX Input Level (peak to peak)
A.F. Output Voltage (mono)
fm = 1KHz
pin 10 and 11VIN = 0.5VRMS
MONO;
Supply Voltage Ripple Rejection VRIPPLE = 200mV; f = 1KHz
Difference of Output Voltage
Levels
pin 10 and 11- mono
Gain
V10/V20
Output Resistance
pin 10 and 11
DC Output Voltage
pin 10 and 11
Channel Separation
Total Harmonic Distortion
VR - VSB = -50mVDC
Signal plus noise to noise ratio f = 20Hz to 16KHz; S = 2Vrms
Min. Typ. Max. Unit
7.5
9
10.2
V
5
10
15
mA
1.5
V
1.5
V
40
55
dB
-0.8
0.8
dB
8.5
9.5 10.5
dB
10
50
Ω
4.2
4.5
4.8
V
30
45
dB
0.02 0.3
%
91
dB
αM
Muting Attenuation
V7 and V8 < 0.6V
VDC
Mute DC Steps at pins 10, 11 Mute at pin 8
CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT
α19 Pilot Signal f = 19KHz
α38 Subcarrier f = 38KHz
α57 Subcarrier f = 57KHz
α76 Subcarrier f = 76KHz
INTERMODULATION (note 1)
α2
fmod = 10KHz; fspur = 1KHz
α3
fmod = 13KHz; fspur = 1KHz
TRAFFIC RADIO (note 2)
α57 Signal f = 57KHz
SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3)
α67 Signal f = 67KHz
ACI - ADJACENT CHANNEL INTERFERENCE (note4)
α114 Signal f = 114KHz
α190 Signal f = 190KHz
MONO/ STEREO SWITCH
VINTH Pilot Threshold Voltage
for stereo "ON"
VINTH Pilot Threshold Voltage
for stereo "OFF"
VPI
Pilot Indicator Saturation
Voltage
I = 1mA
IPI
Pilot Indicator Leakage Current V = 9V
V19
Control Voltage for forced mono α = < 3dB
100
dB
0
4
mV
55
70
dB
75
dB
62
dB
90
dB
65
dB
75
dB
70
dB
75
dB
95
dB
84
dB
12
20
28 mVRMS
7
14
21 mVRMS
0.2
0.5
V
10
µA
0.8
V
3/12
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