AN7243 データシートの表示（PDF） - Panasonic Corporation

部品番号

コンポーネント説明

メーカー

AN7243

ICs for FM/AM Tuner

Panasonic Corporation 

AN7243S

OSC Buff OUT

VCC Dependence

120

OSC Buff OUT

110

100

90

2 4 6 8 10 12 14 16

VCC (V)

Limiting Sensitivity,

Usable Sensitivity,

Temperature Characteristics

IF : AN7257S

40

30

20

Usable Sensitivity

10

Limiting Sensitivity

0

–60 –40 –20 0 20 40 60 80 100

T (˚C)

Input/Output Characteristics

Example

(0.2061V)

0

–10

VCC = 8V

fin= 98MHz

–20

fm = 1kHz, 30% Mod.

400Hz HPF 30kHz LPF

ON

–30

–40

–50

–60

–70

–10 0

20 40 60 80 100

Vin (dBµ)

Limiting Sensitivity,

Usable Sensitivity,

Frequency Characteristics

20

Usable Sensitivity

15

10

Limiting Sensitivity

5

0

88 92 96 100 104 108

fin (MHz)

ICs for FM/AM Tuner

Limiting Sensitivity,

Usable Sensitivity VCC Dependence

IF : AN7257S

30

20

Usable Sensitivity

10

Limiting Sensitivity

2 4 6 8 10 12 14 16

VCC (V)

IM Characteristics (1)

110

fD= 98MHz, CW

fUD1= 98MHz + ∆fUD

1kHz, 30% Mod.

fUD2= 98MHz + 2∆fUD, CW

100

100dBµ

Measure SUD1 level

(Referred to Mix. In)

which can obtain

S/N= 30dB IF is AN7257S

90

SD = 45dBµ

SD = 35dBµ

80

70

Sp

0.01µF

SUD1

AN

7243S

SUD2

–5 –4 –3 –2 –1 0 1 2 3 4 5

∆fUD (MHz)

IM Characteristics (2)

130

120

110

100

90

80

70

fD =98MHz, CW

fUD1=98MHz±∆fUD

1kHz, 30%Mod.

fUD2=98MHz±2∆fUD, CW

400HzHPF, 30kHz LPF ON

IFT– CF Matching R

330Ω

To IFT

To CF

470Ω

Set SUD1 and SUD2 up with the same

level, Measure SD level (Referred to

Mix. In) which can obtain S/N (30dB).

60

50

40

30

20

10

0

50Ω

Sp

SUD1

SUD2

1F : 7256S

50Ω→75Ω AN

0.01µF 7243S

To 1F

∆fUD = + 400Hz, + 800Hz

∆fUD = – 400Hz, + 800Hz

60 70 80 90 100 110 120 130

SUD1, SUD2 (dBµ)

Share Link: