TDA7703 Datasheet, PDF (18/32 Pages) STMicroelectronics – Automatic self alignment for image rejection

Electrical specifications
TDA7703
3.5
3.5.1
Overall system performance
All measurements obtained with application of Figure 9 unless otherwise specified.
FM overall system performance
Antenna level equivalence: 0 dBµV = 1 µV_rms (Antenna terminal voltage with 50 Ω source).
Figure 6. FM input set-up
V_{rf + 6dB}
50Ω A
V_rf
50Ω
50Ω
V_{rf + 6dB}
PCB
UNDER
TEST
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Input level referred to signal generator loaded with 50 Ω (V_rf, node 'A'); no antenna dummy;
AM input not connected. F_rf = 98.1 MHz, V_rf = 60 dBµV, mono modulation, f_dev = 40 kHz,
f_audio = 1 kHz. De-emphasis = 50 µs. Unless otherwise specified
Table 13. FM overall system performance
Parameter
Test condition
Min
Typ Max Units
Tuning range FM Eu
87.5
Tuning step FM Eu
Tuning range FM US
87.5
Tuning step FM US
Tuning range FM Jp
(can be modified by the user)
76
Tuning step FM Jp
Tuning range FM EEu
65
Tuning step FM EEu
Sensitivity
S/N =26dB
@ 60 dBµV, mono
72
Ultimate S/N
@ 60 dBµV,
Deviation = 75 kHz, mono
77
@ 60 dBµV, stereo
70
Distortion
Deviation= 75 kHz
Max deviation
THD=3%
120
Adjacent channel selectivity
(V_u/V_d)
ΔF=100 kHz, SINAD=30 dB
desired 40 dBµV, dev=40kHz,
400Hz
undesired. dev=40kHz, 1KHz
Alternate channel selectivity
(V_u/V_d)
ΔF=200 kHz, SINAD=30 dB
desired 40 dBµV,
dev=40 kHz, 400 Hz
undesired. dev=40kHz, 1kHz
108 MHz
100
kHz
107.9 MHz
200
kHz
90
MHz
100
kHz
74
MHz
100
kHz
-3
0
dBµV
75
dB
80
dB
73
dB
0.15
%
kHz
13
dB
62
dB
Rev 1