BA1451F
Audio ICs
FM
AM
21
2.1
2.1
23
2.1
2.1
22
2.1
2.1
24
1.7
1.4
21
2
4
4.3k
Ω
V
CC
GND
22
24
23
4
100
Ω
V
reg
GND
Pin No.
Function
Internal circuit
Quiescent pin voltage (V)
FM detector bandwidth adjustment
Connect a resistor from this pin to the
reference voltage supply to set the
required detector bandwidth.
Reference voltage supply
Connected to a capacitor.
AM local oscillator
Connect to the AM OSC circuit.
AM local oscillator output
AM OSC output.
!
!
!
!
Electrical characteristics
(Unless otherwise specified, Ta=25
°
C and V
CC
=5V)
FM IF MPX signal source : fi
N
=10.7MHz, modulation 1kHz, 75kHzdev (100%)
19kHz 7.5kHzdev (10%)
AM
: fi
N
=1000kHz, modulation 1kHz 30%
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
I
Q (FM)
29
mA
I
Q (AM)
11
19
mA
V
O
mVrms
V
IN
=100dB
µ
V,mono
L.S
40
dB
µ
V
mono
S / N
−
dB
V
IN
=100dB
µ
V, mono
C.B
−
2
0
+
2
dB
V
IN
=100dB
µ
V, mono
AMR
−
dB
AM : V
IN
=60dB
µ
V, mod=30% , 400Hz
SEP
35
45
−
dB
V
IN
=100dB
µ
V, main
THD
−
%
V
IN
=100dB
µ
V, main
SD
S
dB
µ
V
SD
SW
100
V
IN
=100dB
µ
V, mono
V
IF
300
400
530
V
O
90
120
mVrms
V
IN
=68dB
µ
V
Q.S
dB
µ
V
S / N
42
52
−
dB
V
IN
=68dB
µ
V
THD
−
0.6
1.8
%
V
IN
=68dB
µ
V
SD
S
dB
µ
V
V
IF
300
400
530
V
OBuff
140
200
280
mVrms
mV
P-P
mV
P-P
kHz
13
21
340
480
670
27
34
37
72
80
45
55
0.5
1.6
34
39
44
70
150
70
22
25
28
21
26
31
Quiescent current FM
Quiescent current AM
<FM IF MPX>
Detector output voltage
−
3dB limiting sensitivity
Signal-to-noise ratio
Channel balance
AM suppression ratio
Channel separation
Total harmonic distortion
Station detector sensitivity
Station detector bandwidth
IF OUT output voltage
<AM>
Detector output voltage
Usable sensitivity
Signal-to-noise ratio
Total harmonic distortion
Station detector sensitivity
IF OUT output voltage
Local buffer output voltage
No input
No input
Input for pin 6 current
≥
1mA
IF request ON
Input for S / N = 20dB
Input for pin 6 current
≥
1mA
IF request ON
