TDA7338 Datasheet, PDF (3/11 Pages) STMicroelectronics – STEREO DECODER

TDA7338
ELECTRICAL CHARACTERISTICS (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
V_CC
I_CC
V_IN
V_ORMS
SVRR
V_L/V_R
V_o/V_i
R_O
V_O
α
THD
S+ N
N
Parameter
Supply Voltage
Supply Current
MPX Input Level (peak to peak)
A.F. Output Voltage (mono)
Supply Voltage Ripple Rejection
Difference of Output Voltage Levels
Gain
Output Resistance
DC Output Voltage
Channel Separation
Total Harmonic distortion
Signal plus noise to noise ratio
Test Condition
fm = 1KHz
pin 10 and 11VIN = 0.5V_RMS
MONO;
V_RIPPLE = 200mV; f = 1KHz
pin 10 and 11- mono
V₁₀/V₂₀
pin 10 and 11
pin 10 and 11
V_R - V_SB = -50mV_DC
f = 20Hz to 16KHz;
S = 2Vrms
αM
Muting Attenuation
V7 and V₈ < 0.6V
V_DC
Mute DC Steps at pins 10, 11
Mute at pin 8
CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT
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
100
dB
0
4
mV
α19
Pilot Signal f = 19KHz
α38
Subcarrier f = 38KHz
α57
Subcarrier f = 57KHz
α76
Subcarrier f = 76KHz
INTERMODULATION (note 1)
55
70
dB
75
dB
62
dB
90
dB
α2
f_mod = 10KHz; f_spur = 1KHz
α3
f_mod = 13KHz; f_spur = 1KHz
TRAFFIC RADIO (note 2)
65
dB
75
dB
α57
Signal f = 57KHz
70
dB
SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3)
α67
Signal f = 67KHz
ACI - ADJACENT CHANNEL INTERFERENCE (note4)
75
dB
α114
Signal f = 114KHz
α190
Signal f = 190KHz
MONO/ STEREO SWITCH
95
dB
84
dB
V_INTH
V_INTH
Pilot Threshold Voltage
Pilot Threshold Voltage
V_PI
Pilot Indicator Saturation Voltage
I_PI
Pilot Indicator Leakage Current
V₁₉
Control Voltage for forced mono
STEREO BLEND
for stereo ”ON”
for stereo ”OFF”
I = 1mA
V = 9V
α = < 3dB
12
20
28 mV_RMS
7
14
21 mV_RMS
0.2
0.5
V
10
µA
0.8
V
V_16-17
V_16-17
Control Voltage for Channel
Separation
Control Voltage for Channel
Separation
α = 6dB; VR = 3.6V (note 5)
α = 26dB;
-0.31 -0.27 -0.23 V
-85
-55
-30
mV
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