tda7421n STMicroelectronics, tda7421n Datasheet - Page 6

• Manufacturer Part Number: tda7421n
• Description: Am/fm Tuner For Car Radio And Hi-fi Applications
• Manufacturer: STMicroelectronics

TDA7421N
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FM SECTION GLOBAL PERFORMANCES
Refer to Evaluation Circuit
– Input 98.1MHz, 40KHz dev., 1KHz mod., 60dB V antenna level, mono.
– MPX Output, de-enphasis 50 s, BPF 200Hz-15KHz.
AM SECTION GLOBAL PERFORMANCES
Refer to Evaluation Circuit
- Input: fc = 999KHz, f mod = 400Hz, m = 30%, 74dB V
- Audio Output + RC BPF (BPF 20Hz - 20KHz)
Symbol
FM I
AGC
V
S+N/N
S+N/N
V
V
V
THD
THD
US
US
IN MIN
MI
V
AMST
IN US
IMAG
O AF
V
AF
Tw
CC
is
CC
1
2
SP
Total Supply Current Including
Mixer
Signal to Noise Ratio
Total Harmonic Distortion
Audio Output Level
Usable Sensitivity (40dB)
Usable Sensitivity (26dB)
AGC Starting point
Total supply current including
mixers
Maximum Sensitivity
Usable Sensitivity
AGC Range
Signal to Noise Ratio
Image Rejection
Tweet, (S+N/N)
Total Harmonic Distortion
Audio Output Level
AM IF2 Output level
Parameter
75kHz Deviation
antenna level at which
S+N/N = 40dB
antenna level at which
S+N/N = 26dB
S+N/N = 20dB
V
f
@ V
f1 = 900KHz;f2 = 1350KHz
m = 80%
V
im
V
INRF
INRF
V
AF
AF
= 22.399MHz, antenna level
= -10dB
F
= - 20dB
= 74dBu
= 120dB V
= -10dB
emf
Test Condition
antenna level unless otherwise specified.
emf
Min.
Typ.
400
107
105
0.3
1.2
0.3
0.3
90
66
55
80
13
27
50
54
-6
0
1
Max.
mV
mV
dB V
dB V
dB V
dB V
dB V
dB V
(emf)
(emf)
Unit
mA
mA
dB
dB
dB
dB
dB
%
%
%
%
RMS
RMS