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TDA7421N Datasheet(PDF) 6 Page - STMicroelectronics

Part # TDA7421N
Description  AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7421N Datasheet(HTML) 6 Page - STMicroelectronics

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FM SECTION GLOBAL PERFORMANCES
Refer to Evaluation Circuit
– Input 98.1MHz, 40KHz dev., 1KHz mod., 60dB
µV antenna level, mono.
– MPX Output, de-enphasis 50
µs, BPF 200Hz-15KHz.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
FM ICC
Total Supply Current Including
Mixer
90
mA
S+N/N
Signal to Noise Ratio
66
dB
THD
Total Harmonic Distortion
0.3
%
VO AF
Audio Output Level
75kHz Deviation
400
mVRMS
US1
Usable Sensitivity (40dB)
antenna level at which
S+N/N = 40dB
0dB
µV
US2
Usable Sensitivity (26dB)
antenna level at which
S+N/N = 26dB
-6
dB
µV
AGCSP
AGC Starting point
55
dB
µV
AM SECTION GLOBAL PERFORMANCES
Refer to Evaluation Circuit
- Input: fc = 999KHz, f mod = 400Hz, m = 30%, 74dB
µVemf antenna level unless otherwise specified.
- Audio Output + RC BPF (BPF 20Hz - 20KHz)
∆MICC
Total supply current including
mixers
80
mA
VIN MIN
Maximum Sensitivity
∆VAF = - 20dB
13
dB
µV
(emf)
VIN US
Usable Sensitivity
S+N/N = 20dB
27
dB
µV
(emf)
∆Vis
AGC Range
∆VAF = -10dB
50
dB
S+N/N
Signal to Noise Ratio
VINRF = 74dBu
54
dB
αIMAG
Image Rejection
fim = 22.399MHz, antenna level
@ V∆F = -10dB
dB
αTw
Tweet,
∆(S+N/N)
f1 = 900KHz;f2 = 1350KHz
1.2
dB
THD
Total Harmonic Distortion
0.3
%
m = 80%
1
%
VINRF = 120dBµVemf
0.3
%
VAF
Audio Output Level
107
mVRMS
VAMST
AM IF2 Output level
105
dB
µV



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