TDA7514 STMicroelectronics, TDA7514 Datasheet - Page 17

• Manufacturer Part Number: TDA7514
• Description: SINGLE-CHIP FM/AM TUNER
• Manufacturer: STMicroelectronics

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3.4 STEREODECODER
Standard Conditions, unless otherwise indicated:
FM: Input at #TUNER_IN = 1 kHz at 450 mVrms, Input Gain setting = 0.5 dB, Deemphasis = 75 µs, Roll
Off Compensation set to give maximum stereo separation (note that this varies with VSBL setting)
AM: Input at #TUNER_IN = 1 kHz at 1 Vrms, Input Gain setting = 0.5 dB
Table 6.
MONO/STEREO SWITCH (With InGain=5.75dB)
PLL
DEEMPHASIS & HIGHCUT
Carrier and Harmonic suppresion at output
Intermodulation
SCA – Subsidiary Communication Authorization
ACI – Adjacent Channel Interference
τ
τ
V
V
V
V
Symbol
DeempFM
DeempAM
REF5V
G
SVRR
Gmax
PTHMO1
PTHMO0
PTHST1
PTHST0
α114
α190
Gain
THD
S+N
α19
α38
α57
α76
α57
α67
Rin
V
∆f/f
STEP
α2
α3
N
a
IN
MPX Input Level
Input Resistance (TUNERIN)
Minimum Input Gain
Maximum Input Gain
Step Resolution
Max Channel Separation
Supply Voltage Ripple
Rejection
Total Harmonic Distortion
Signal plus Noise to Noise
Ratio
Pilot Threshold Voltage
Pilot Threshold Voltage
Pilot Threshold Voltage
Pilot Threshold Voltage
Capture Range
Deemphasis Time Constants
FM; V
Deemphasis Time Constants
AM; V
Internal Reference Voltage
Pilot Signal
Subcarrier
Subcarrier
Subcarrier
fmod=10kHz, fspur=1kHz
fmod=13kHz, fspur=1kHz
Signal
Signal
Signal
Signal
LEVEL >> VHCH
LEVEL >> VHCH
Parameter
Input Gain = 3.5dB
FM
AM
Vripple=100mV, f=1kHz
fin=1kHz, mono
A-weighted, S=2Vrms
for Stereo, PTH=1
for Stereo, PTH=0
for Mono, PTH=1
for Mono, PTH=0
Deemphasis=50µs, FM
Deemphasis=75µs, FM
Deemphasis=50µs, AM
Deemphasis=75µs, AM
f=19kHz, Deemphasis=75µs
f=38kHz, Deemphasis=75µs
f=57kHz, Deemphasis=75µs
f=76kHz, Deemphasis=75µs
f = 57kHz
f = 67kHz
f = 114kHz
f = 190kHz
Traffic Radio
Test Condition
Min.
0.5
4.7
70
30
35
80
10
15
10
25
50
40
7
Typ.
5.75
1.75
0.02
22.3
14.9
100
0.5
0.5
50
91
19
65
75
70
95
84
30
55
15
25
12
50
75
50
75
62
90
75
5
Max.
1.25
130
100
0.3
5.3
25
35
17
25
75
TDA7514
V
Unit
kHz
kHz
mV
mV
mV
mV
kΩ
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
RMS
µs
µs
%
%
V
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