TDA7340G Datasheet, PDF (7/27 Pages) STMicroelectronics – AUDIO SIGNAL PROCESSOR

TDA7340G
STEREO DECODER PART
ELECTRICAL CHARACTERISTICS (VS = 9V; modulation frequency: 1KHz; de-emphasis time:
T = 50µs; nominal MPX input voltage: V_MPX = 0.5V_RMS (75KHz deviation); GI = 3.5dB; T_amb = 27°C; un-
less otherwise specified)
Symbol
VIN
R_IN
G_MIN
GMAX
G_STEP
SVRR
VO
α
THD
S+N
N
Parameter
MPX Input Level
Input Resistance
Minimum Input Gain
Maximum Input Gain
Step Resolution
Supply Voltage Ripple Rejection
DC Output Voltage (HCL, HCR)
Channel Separation
Total Harmonic distortion
Signal plus noise to noise ratio
Test Condition
V_RIPPLE = 100mV; f = 1KHz
V_SB - V_R = 100m_VDC
f = 20Hz to 16KHz; S = 2VRMS
Min.
35
2.5
9.5
1.75
50
4.2
Typ.
0.5
50
3.5
11
2.5
60
4.5
50
0.02
91
Max.
1.25
65
4.5
12.5
3.25
4.8
0.2
Unit
VRMS
KΩ
dB
dB
dB
dB
V
dB
%
dB
CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT
α19
Pilot Signal f = 19KHz
55
α38
Subcarrier f = 38KHz
α57
Subcarrier f = 57KHz
α76
Subcarrier f = 76KHz
INTERMODULATION (note 1)
α2
f_mod = 10KHz; f_spur = 1KHz
α3
f_mod = 13KHz; f_spur = 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
V_INTH
Pilot Threshold Voltage
for stereo ”ON” Pth = 1
11
Pth = 0
18
V_INTH
Pilot Threshold Voltage
for stereo ”OFF” Pth = 1
6
Pth = 0
13
STEREO BLEND
V_SB-VR
Control Voltage for Channel
Separation
V_SB-VR
Control Voltage for Channel
Separation
α = 6dB; V_R = 3.6V (note 5)
α = 26dB;
-0.31
HIGH CUT CONTROL
τ_deemp
De-Emphasis Time Constant
R_HCC
High Cut Control Resistance
R_HCC
High Cut Control Resistance
C₁₃, C₁₄ = 1nF; V_HCC-VR = 100mV
V_HCC-VR = 100mV
V_HCC-VR = -1.3V (note 6)
115
VCO
f_OSC
∆f/f
Oscillator Frequency
Capture and Holding Range
75
75
62
90
65
75
70
75
95
84
15
25
12
19
-0.26
-50
50
50
150
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
22 mV_RMS
34 mVRMS
18 mV_RMS
25 mV_RMS
-0.23 V
mV
µs
KΩ
185 KΩ
456 KHz
1
%
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