BA1451F
Audio ICs
!
!
!
!
Application example
Fig. 2
BPF
13
14
15
16
17
18
19
20
21
22
23
24
SD
MPX
MPX
DET
AGC
IFIN
MIXOUT
AM IN
BW Adj
AM
Vreg
AMFM
Lch
Rch
IF OUT
IF REQ
ST
TUN
FM DET
GND
SD Adj
V
DD
FMIN
5
6
7
8
4
3
2
1
10
11
12
13
14
15
16
17
18
P0
P1
P2
AMIN
FMIN
V
DD
PD1
PD2
GND
P3
IFIN
SD
TUN
CL
DA
CE
XIN
XOUT
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
BA1451F
BU2616F
µ
-COM
Vcc2 (+9V)
Vcc (5V)
TUNING
TO LED etc.
Rch OUT
Lch OUT
STEREO
PD
/
MUTE
/
/
MONO
IN
IN
OUT
AM
AM
OSC
OSC
OUT
BA4425F
CL
DA
CE
!
!
!
!
Electrical characteristic curves
Fig.3 FM input / output characteristics
S+D+N
0
60
−
20
100
120
−
90
1
2
3
4
5
6
7
−
80
−
70
−
60
−
50
−
40
−
30
−
20
−
10
0
L
→
R
AMR
N
D+N (100%)
D+N (30%)
INPUT VOLTAGE : V
IN
(dB
µ
)
TOTAL HARMONIC DISTORTION : THD (%)
Vo, AMR, SEP (dB)
Vcc=5V,
f
IN
=10.7MHz,
fm=1kHz
∆
f=±22.5kHzdev,
pilot=±7.5kHzdev
Ta=25˚C,
AMR MOD=30%,
fm=400Hz
SEP
R
→
L
0
20
40
80
f
IN
=10.7MHz,
V
IN
=100dB
µ,
∆
f=±22.5kHzdev.
(pilot=±7.5kHzdev)
f
IN
=1kHz,
Ta=25˚C,
RSD=20k
Ω
POWER SUPPLY VOLTAGE : V
CC
(V)
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
10
11
0
10
20
30
40
50
60
70
80
90
100
110
−
3dBL, S, TUNED ON (dB
µ
) SEP (dB)
TOTAL HARMONIC DISTORTION : THD (%)
V
O
R
→
L
L
→
R
70
80
90
100
110
120
130
140
150
160
170
180
Vo (mVrms)
Fig.4 FM characteristics vs.
power suppy voltage
TUNED ON
−
3dB L.S.
D+N (100%)
D+N (30%)
