Datasheet AN7273S, AN7273 Datasheet (Panasonic)

ICs for FM/AM Tuner

■ Overview

The AN7273 and the AN7273S are the ICs designed
for Hi-Fi stereo tuner. They are functioned with stop signal
pin besides the AN7223S function.

■ Features

•

Level meter output (FM–AM common use)

•

Stop signal output (for synthesizer tuner)

•

AM : including RF amplifier and high sensitivity

•

Low power consumption

•

Low shock noise level from function switch operation

•

Fewer external parts

AN7273, AN7273S

AM Tuner, FM/AM IF Amplifier Circuit

8 9

1

7

4

3

5 18 6 2 10 11

15

13

16

17

14

12

AM–FM
IF Amp.

FM IF
Amp.

FM
Quad. Det.

Mute Det.

AF Amp.

Mute or Shock
Noise Canceller

Level Meter

AM
Mixer

AM RF
Amp.

AM
L. Osc.

AGC

AM Det.

GNDV

CC (AM)

V

CC

V

REF

■ Block Diagram

1
2

3
4
5
6
7
8

3 ~ 15˚

7.62±0.25

0.3

+ 0.1

– 0.025

3.8±0.25

(3.45)

0.51min.

2.54

1.2±0.25

0.5±0.1

Unit : mm

6.3±0.25

18
17
16
15
14
13
12
11

21.7±0.3

9 10

AN7273

18-Lead DIP Package (DIP018-P-0300E)

AN7273S

1

1.3

0.4±0.25

1.27
9

0.1

0.3

5.4±0.3

7.7±0.3

18-Lead SOP Package (SOP018-P-0300)

Unit : mm

18

12.6±0.3

10

1.2±0.3

0.65

0.15

AN7273, AN7273S

ICs for FM/AMTuner

Pin No.

Pin Name
1
2
3
4
5
6
7
8
9

FM IF Input
AM Supply/Mute Adjustment
AM RF Input
AM Mixer Output
AGC Output (2)
AGC Output (1)
AM IF Input
IF By-pass
IF By-pass

■ Pin Descriptions

Pin No.

Pin Name
10
11
12
13
14
15
16
17
18

AM Detection Output
GND
FM Detection Coil
AF Output
V

CC

Level Meter Output
AFC Output
Reference Voltage
Local Oscillation Coil

Parameter Symbol Rating Unit

P

D

T

opr

T

csg

V

CC

I

CC

AN7273
AN7273S
AN7273
AN7273S
AN7273
AN7273S

Power Dissipation

Operating Ambient Temperature

Storage Temperature

Supply Voltage
Supply Current

mW

˚C

˚C

V

mA

14.4
30

317

*

1

210

*

2

–20 ~ + 75

–20 ~ + 75
–55 ~ + 150
–55 ~ + 125

*

1 Ta = 25˚C, *2 Ta = 75˚C

■ Absolute Maximum Ratings (Ta=25˚C)

DC measurement
V

i

=80dBµ

Input at V

O

= –3dB

Input at V

O

=more than –20dB

V

i

=70dBµ

V

i

=100dBµ

DC measurement
Vi =80dBµ
Input at V

O

=10mV

V

i

= –10dBµ

V

i

=80dBµ

Parameter Symbol Condition min. typ. max. Unit

■ Electrical Characteristics (VCC= 5V, Ta= 25˚C)

I

tot

V

O

V

i (lim)

V

i (Mute)

V

15–11

V

15–11

I

tot

V

O

S

max.

V

15–11

V

15–11

9

75

43.5
55

0.61

1.14

8

60

4
0

1.12

14

100

46
64

0.8

1.26
13
80

9.5

1.25

20

125

49.5
73

1.1

1.42
19

100

15

130

1.38

mA
mV

dBµ
dBµ

V

V
mA
mA

dBµ

mV

V

Total Circuit Current
Demodulation Output Level
Limiting Sensitivity
Muting Sensitivity
Level Meter Driving Output (1)
Level Meter Driving Output (2)
Total Circuit Current
Detection Output Level
Max. Sensitivity
Level Meter Driving Output (1)
Level Meter Driving Output (2)

Note) Unless otherwise specified, f

i

=10.7MHz, Mod. = 22.5kHz, fm = 400Hz (FM)

f

i

=1MHz, Mod. = 30%, fm = 400Hz (AM)

FM

AM

Parameter Symbol Range

■ Recommended Operating Range (Ta = 25˚C)

Operating Supply Voltage Range

V

CC (opr)

3 ~ 12V

ICs for FM/AMTuner

AN7273, AN7273S

V

i (lim)

, VO, I

tot –VCC

(FM)

VO –Vi

0

–20

–40

–60

–80

Input Voltage V

i

(dBµ)

Output Voltage V

O

(dB)

600 20 40 12010080

Mute ON

VO –Df

10

0

–10

–20

–30

–40

–50

–60

–70

Input Frequency Change Df (kHz)

Output Voltage V

O

(dB)

0–300 –200 –100 300200100

140

120

100

80

60

50

48

46

44

14

12

10

8

6

4

2

0

Input Limiting Voltage V

i (lim)

(dBµ)

Total Circuit Current I

tot

(mA)

0 2 4 6 8 10 12 14 16

Output Voltage V

O

(mV)

Output Voltage V

O

(mV)

Supply VoltageVCC (V)

V

CC

= 5V

f

i

= 10.7MHz

f

m

= 400Hz, 22.5kHz

140

120

100

80

60

40

28

24

20

16

12

14

13

12

11

10

Input Voltage V

i

(dBµ)

Total Circuit Current I

tot

(mA)

0 2 4 6 8 10 12 14 16

Supply Voltage VCC (V)

f

m

= 400Hz, 30%

f

i

= 1MHz

VO, Vi, I

tot –VCC

(AM)

V

O

I

tot

(Mute ON)

I

tot

(Mute OFF)

V

i (lim)

V

O

(V

i

= 80dB

µ)

I

tot

V

i

(at V

O

= 10mV )

Mute OFF

Mute ON

Mute OFF

V

CC

= 5V

f

i

= 10.7MHz

f

m

= 22.5kHz,
400Hz
0dB

= 108mV

VO, Vno, THD –Vi (FM)

0

–10

–20

–30

–40

–50

–60

–70

–80

Input Voltage V

i

(dBµ)

Output Voltage V

O

(dB), Output Noise Voltage V

no

(dB)

600 20 40 12010080

5

4

3

2

1

0

Total Harmonic Distortion THD (%)

0dB = 81mV
V

CC

= 5V

f

m

= 400Hz

f

i

= 1MHz

VO, S/N, THD –Vi (AM)

10

0

–10

–20

–30

–40

–50

–60

–70

Input Voltage V

i

(dBµ)

Output Voltage V

O

(dB), Signal to Noise Ratio S/N (dB)

600 20 40 12010080

12

10

8

6

4

2

0

Total Harmonic Distortion THD (%)

V

15 –Vi

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

Input Voltage V

i

(dBµ)

Level meter Voltage V

15

(V)

600 20 40 12010080

V

CC

= 5V

(AM) f

i

= 1MHz

f

m

= 400Hz, 30%

(FM) f

i

= 10.7MHz

f

m

= 400Hz, 22.5kHz

THD

Mod. = 80%

V

O

S/N

Mod. = 30%

THD

V

no

V

O

AM

FM

AN7273, AN7273S

ICs for FM/AMTuner

1 2 3 4 5 6 7 8 9

17 16 15 14 13 12 11 10

AN7273/S

–

+

–

+

–

+

–

+

–

+

–+–

+

CF

1

T

3

2kΩ

10kΩ

ON

OFF

Mute

330Ω

From
FM Front
End.

0.022µF 0.022µF

4.7µF

100µF

0.022µF

0.0047µF

0.01

µF

27kΩ

470

Ω

2.2kΩ

D

1

51Ω

100µF

100µF

47µF

47

Ω

FM

AM

0.022

µ

F

V

15

2.2µF

10µF

5.1kΩ

0.022µF

T

2

D1 : MA27W

V

CC

=5V

V

O

(FM, AM)

0.022µF

T

1

18

■ Application Circuit

22µF

0.022µF
47µF

0.0047µF

0.022µF

100µF

2.2kΩ

0.01µF

27kΩ

AF Output

V

CC

T1

10µF

5.1kΩ

1

470Ω

V

CC

1µF

47Ω

SW

FM

AM

2.2kΩ

Mute Adj.

10kΩ

100µF

0.022µF

Mute SW

MA27W (Matsushita)

AM

IN

T2

AM ANT

C1

ANT OSC

CF2

0.022µF

0.022µF

0.022µF

47pF

4.7µF

100µF

CF1

T3

330Ω

18

FM IF Input

+ –

AN7273

■ Printed Circuit Board Layout

ICs for FM/AMTuner

AN7273, AN7273S

Symbol

T

1

Use, Freq. Type No. Maker

Connection Diagram

Number of Turns

Tuning Cap. Unloaded Q

T

2

T

3

Matsushita

Matsushita

Matsushita

100pF

—

1500pF

90±20%

95±20%

60±30%

FM
Quad. Coil

10.7MHz

AM MW
Osc. Coil

AM Mix.
Output
455kHz

ELL–
7S754

ELF–
7S752A

■ Coil Specifications

1 – 2 8T
2 – 3 5T
4 – 6 3T

1 – 2 4T
2 – 3 125T
4 – 6 7T

3 – 2 35T
6 – 4 10T
2 – 1 19T

EIA–
7S802A

4

6

2

1

3

4

6

2

3

1

4

6

2

3

1

TokoCF

1

Symbol Maker Band Width Loss

■ Ceramic Filter Specification

455kHz

Use Type No. Center Freq.

AM IF CFM2– 455B 7kHz (–6dB) 2.6dB