ICs for FM/AM Tuner
1
AN7293NSC
FM-IF, NC, MPX IC for car radio
n Overview
The AN7293NSC is an IC having FM-IF, NC and
MPX functions for car radio. A tuner block of car radio
can be constructed in combination with the AN7289NFBQ/
NSC. Small outline package product (the AN7293NFBQ)
is also available.
n Features
• A less number of external components is required (8
components reduction compared with our conventional
IC)
• Neighbouring-station interference characteristics im-
provement by band-ATC function
• Band-mute on/off function
n Applications
• Car radios
n Block Diagram
S-Meter Adj.
S-Meter
Forced Mono
ATC Adj.
Sep. Adj.
R-Out L-Out
GNDIF In IF-Count./ST-Ind./SDAFCV
CC
V
BAND
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
Level det. Multipath det. Demod. VCO PLL
Pilot
det.
IF limiter IF det.
V
REF
Mute PNL Noise det.
SD, IF counter
Band Mute
SSOP032-P-0375
Unit: mm
17.81– 0.3
0.35– 0.1
7.2
–
0.3
9.3
–
0.3
2.0
–
0.2
0.1
–
0.1
32 17
116
0.15
0.3
1.01.23
0.9
Seating plane