BA1451F 查看數據表（PDF） - ROHM Semiconductor

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BA1451F

AM radio / FM IF stereo system IC

ROHM Semiconductor 

Audio ICs

!Application example

BA1451F

8 76 5

BA4425F

1 23 4

BPF

24 23

OSC Vreg

OUT

22 21 20 19 18 17 16 15 14 13

AM BW Adj AM IN MIXOUT IFIN AGC DET MPX MPX SD

OSC

AM AM

OUT IN IN /

MONO

BA1451F

MUTE

/

FMIN VDD SD Adj GND FM DET TUN ST IF REQ IF OUT Rch

1 2 3 4 5 6 7 8 9 10

PD

/

Lch AMFM

11 12

Vcc2 (+9V)

18 17 16 15 14 13 12 11 10

GND PD2 PD1 VDD FMIN AMIN P2 P1 P0

BU2616F

XOUT XIN CE DA CL TUN SD IFIN P3

123456789

Vcc (5V)

Lch OUT

Rch OUT

CE DA CL

µ-COM

Fig. 2

!Electrical characteristic curves

S+D+N

0

−10

7 −20

6 −30

5 −40

Vcc=5V,

4

−50 fIN=10.7MHz,

3

−60

fm=1kHz

∆f=±22.5kHzdev,

AMR

R→L

SEP

L→R

2

−70

pilot=±7.5kHzdev

Ta=25˚C,

1 −80 AMR MOD=30%,

N

D+N (100%)

fm=400Hz

D+N (30%)

0

−9−020 0 20 40 60 80 100 120

INPUT VOLTAGE : VIN (dBµ)

Fig.3 FM input / output characteristics

TUNING

STEREO

TO LED etc.

180 110

170 100

160 90

150 80

140 70

130 60

120 50

110 40

100 30

90 20

80 10

70 0

11

10

9

8

7

6

5

R→L

4

3

L→R

VO

fIN=10.7MHz,

VIN=100dBµ,

∆f=±22.5kHzdev.

(pilot=±7.5kHzdev)

fIN=1kHz,

Ta=25˚C,

RSD=20kΩ

TUNED ON

−3dB L.S.

2

1

D+N (100%)

D+N (30%)

0

3

4

5

6

7

8

9

POWER SUPPLY VOLTAGE : VCC (V)

Fig.4 FM characteristics vs.

power suppy voltage

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