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ICs for FM/AM Tuner
AN7293NFBQ
FM-IF, NC, MPX IC for Car Radio
■ Overview
The AN7293NFBQ is an IC having FM-IF, NC and
MPX function for car radio. A tuner block of car radio can
be constructed by this IC and the AN7289NFBQ/NSC.
■ Features
• A less number of external components is required (8
components reduction compared with our conventional
IC)
• Neighbering-station interference characteristics im-
provement by band-ATC function
• Band-mute on/off function
• DIL package product (the AN7293NSC) is also available
■ Applications
• Car radios
■ Block Diagram
23
22
V
CC
Mute
GND
V
REF
IF-In
25
26
27
28
29
Mute-Adj.
24
IF
det.
V
REF
IF
limiter
AFC
21
SD-Adj.
20
19
Band-det.
SD
IF-counter
25
32
0.1±0.1
ST-Ind.
Mono: high
Stereo: low
18
PNL
Noise
det.
24 17
18
7.0±0.3
9.2±0.4
SSOP032-P-0375
Unit: mm
16
–0.05
+0.10
0.3
0.8
9
–0.05
+0.10
0.15
(0.55)
0.625±0.100 0.625±0.100
17
16
15
14
13
V
BAND
12
7.0±0.3
9.2±0.4
1.4±0.2
Level
30
Out
V
S
31
det.
Multipath
det.
Demod.
32
1
2
3
4
5
R-Out
SEP-Adj.
ATC-Adj.
6
L-Out
VCO
PLL
Pilot
det.
7
11
10
9
8
Forced mono
1
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AN7293NFBQ ICs for FM/AM Tuner
■ Pin Description
Pin No. Description
1 ASC adjustment/forced monaural
2 ATC adjustment
3 Separation adjustment
4 ATC low-pass filter
5 R-ch. output
6 L-ch. output
7 Mute voltage
8 Pilot detection low-pass filter
9 PLL low-pass filter
10 PLL low-pass filter
11 VCO
12 Pilot cancel control low-pass filter
13 Band signal output/band mute SW
14 PNL low-pass filter
15 PNL AGC
16 PNL input
Pin No. Description
17 Detection output
18 PNL output hold
19 SD/FM-IF counter output/stereo indicator
20 SD sensitivity adjustment
21 AFC voltage
22 V
CC
23 FM detection
24 Soft mute adjustment
25 GND
26 V
REF
27 IF bypass
28 IF input
29 Control voltage adjustment
30 Control voltage
31 Multi-path noise input
32 Multi-path detection
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage V
Supply current I
2
Power dissipation
Operating ambient temperature
Storage temperature
Note)*1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C.
2: Ta = 80°C
*
*
1
*
1
*
CC
CC
P
D
T
opr
T
stg
9.1 V
45 mA
343.3 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