BA1451F データシートの表示（PDF） - ROHM Semiconductor
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BA1451F Datasheet PDF : 8 Pages
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Audio ICs
Pin No.
Function
FM detector bandwidth adjustment
21 Connect a resistor from this pin to the
reference voltage supply to set the
required detector bandwidth.
Reference voltage supply
23
Connected to a capacitor.
AM local oscillator
22
Connect to the AM OSC circuit.
AM local oscillator output
24
AM OSC output.
BA1451F
Internal circuit
21
VCC 2
GND 4
4.3kΩ
Quiescent pin voltage (V)
FM
AM
2.1
2.1
2.1
2.1
Vreg 23
GND 4
22
2.1
2.1
24
1.7
1.4
!Electrical characteristics (Unless otherwise specified, Ta=25°C and VCC=5V)
FM IF MPX signal source : fiN=10.7MHz, modulation 1kHz, 75kHzdev (100%)
19kHz 7.5kHzdev (10%)
AM
: fiN=1000kHz, modulation 1kHz 30%
Parameter
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
Symbol
IQ (FM)
IQ (AM)
Min.
13
11
VO
340
L.S
34
S/N
72
C.B
−2
AMR
45
SEP
35
THD
−
SDS
34
SDSW
70
VIF
300
VO
70
Q.S
22
S/N
42
THD
−
SDS
21
VIF
300
VOBuff
140
Typ.
21
19
480
37
80
0
55
45
0.5
39
100
400
90
25
52
0.6
26
400
200
Max.
29
27
Unit
mA No input
mA No input
Conditions
670 mVrms VIN=100dBµV,mono
40
dBµV mono
−
dB VIN=100dBµV, mono
+2
dB VIN=100dBµV, mono
−
dB AM : V IN=60dBµV, mod=30% , 400Hz
−
dB VIN=100dBµV, main
1.6
%
VIN=100dBµV, main
44
dBµV Input for pin 6 current ≥ 1mA
150
kHz VIN=100dBµV, mono
530 mVP-P IF request ON
120 mVrms VIN=68dBµV
28
dBµV Input for S / N = 20dB
−
dB VIN=68dBµV
1.8
%
VIN=68dBµV
31
dBµV Input for pin 6 current ≥ 1mA
530 mVP-P IF request ON
280 mVrms
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