![](/html/89/894f/894fa97f195108a5b3283d728b3869963e8db3a692ebbb8df5f09f57b1d801af/bg1.png)
ICs for FM/AM Tuner
AN7293NSC
FM-IF, NC, MPX IC for car radio
■ 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.
■ 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
■ Applications
• Car radios
■ Block Diagram
Unit: mm
32 17
116
17.81±0.3
0.35±0.1
Seating plane
SSOP032-P-0375
9.3±0.3
7.2±0.3
0.3
0.15
2.0±0.2
1.01.23
0.9
0.1±0.1
30
3
GND
29
28
V
REF
4
5
Forced Mono
IF In
32
31
IF limiter IF det.
Level det. Multipath det. Demod. VCO PLL
1
2
S-Meter
S-Meter Adj.
27
6
ATC Adj.
CC
AFC
V
26
25
Mute PNL Noise det.
7
8
Sep. Adj.
IF-Count./ST-Ind./SD
24
23
SD, IF counter
Band Mute
9
10
L-Out
R-Out
22
11
21
Pilot
det.
12
20
13
19
14
18
15
17
16
BAND
V
1
![](/html/89/894f/894fa97f195108a5b3283d728b3869963e8db3a692ebbb8df5f09f57b1d801af/bg2.png)
AN7293NSC ICs for FM/AM Tuner
■ Pin Description
Pin No. Description
1 Control voltage adjustment
2 Control voltage
3 Multiple-path noise input
4 Multiple-path detection
5 ASC adjustment/forced monaural
6 ATC adjustment
7 Separation adjustment
8 ATC low-pass filter
9 R-channel output
10 L-channel output
11 Mute voltage
12 Pilot detection low-pass filter
13 PLL low-pass filter
14 PLL low-pass filter
15 VCO
16 Pilot cancel control low-pass filter
Pin No. Description
17 Band signal output/band mute SW
18 PNL low-pass filter
19 PNL AGC
20 PNL input
21 Detection output
22 PNL output hold
23 SD/FM-IF counter output/stereo indicator
24 SD sensitivity adjustment
25 AFC voltage
26 V
CC
27 FM detection
28 Soft mute adjustment
29 GND
30 V
REF
31 IF bypass
32 IF input
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage V
Supply current I
2
Power dissipation
Operating ambient temperature
Storage temperature
Note)*1: Ta = 25°C except power dissipation, operating ambient temperature and storage temperature.
2: Ta = 80°C
*
*
1
*
1
*
CC
CC
P
D
T
opr
T
stg
9.1 V
45 mA
380.2 mW
−30 to +80 °C
−55 to +125 °C
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage V
CC
7.2 to 9.0 V
2