Panasonic AN7233SH Datasheet

■ Overview

The AN7233SH is an IC for tuner of 1.5V headphone
stereo. It incorporates AM tuner + FM IF + FM detector +
FM MPX and has been provided with the station detec­tion function and IF count output function required to sup­port DTS, and the AM IF output function required to sup­port AM stereo. It is included in the 28-lead SSOP pack­age with 0.5mm pitch.

■ Features

•

Low voltage operation : VCC=1.0V or more

•

AM tuner/FM IF + FM detection + FM MPX : one chip

•

DTS supported

•

AM stereo support possible

•

Adjustable sensitivity for station detection

•

Small package

■ Block Diagram

ICs for FM/AM Tuner

AN7233SH

FM/AM Tuner for 1.5V Headphone Stereo

Unit : mm

28 15

114

(0.65)

0.50

0.2

+ 0.10
– 0.05

1.55max.

1.20

±0.20

28-lead SSOP package (SSOP028-P-0300)

7.80

±0.20

8.10±0.30

6.10±0.20

0.5±0.20

SEATING PLANE

0 ~10˚

0.15

+ 0.10

– 0.05

SEATING PLANE

0.10±0.10

28 27 26 25 24 23 22 21 20 19 18 17 16 15

AM
Osc

AM
Mix.

AM
RF

1 2 3 4 5 6 7 8 9 10 11 12 13 14

ST Ind. VCO LPF

Freq.
Divider

IF

MPX
SW

PC

AM Det.
AGC

LEVEL
Det.

SD

FM
Det.

V

CC

GND

AM AF
Buffer

AN7233SH

ICs for FM/AM Tuner

■ Absolute Maximum Ratings (Ta=25˚C)

VCC

I

CC

P

D

T

opr

T

stg

Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature

V

mA

mW

˚C
˚C

Parameter Symbol Rating Unit

7.0
10
70

–20 ~ + 75

–55 ~ + 125

Parameter Symbol Range

■ Recommended Operating Range (Ta=25˚C)

Operating Supply Voltage Range

V

CC

1.0V ~ 2.0V

Parameter Symbol Condition min. typ. max. Unit

■ Electrical Characteristics (V

CC

=1.2V, Ta= 25˚C±2˚C)

Total Circuit Current
Output Voltage
Limiting Sensitivity
S/N Ratio
THD

mA
mV

dBµ

dB

%

No signals (under VCO operating)

V

i

for VO = –3dB

I

tot (FM)

V

O (FM)

V

i (lim)

IF Buffer Output 2

LED ON Sensitivity
LED Decreased Voltage ON Sensitivity
IF Buffer Output 1

VCC=

1.0V, No modulation REQ OFF

VIN= 80dBµ, No modulation

VCC=

1.1V, No modulation REQ OFF

V

i (FMLED1)

V

i (FMLED2)

V

OIF1 (FM)

5.5
26
38
55

7.5
44
45

9.5
61
48

1.4

48
48

55
58
48

61
69
86

dBµ
dBµ

mVrms

Note) FM : f = 10.7MHz, Df = 22.5kHz, f

m

= 1kHz, VIN = 80dBµ, AM : f = 1MHz, Mod. = 30%, fm = 1kHz, VIN = 50dBµ

MPX : f = 10.7MHz, Df = 75kHz (L+ R90%, Pilot90%), fm = 1kHz, VIN = 80dBµ

FM

S/N (FM)

THD (FM)

AM

S/N (AM)

THD (AM)

VCC=

1.1 V, No modulation REQ OFF

MPX

THD

(STEREO)

V

P (ON)

V

P (OFF)

V

OIF2 (FM)

VCC=1.0V, VIN= 80dBµ,
No modulation

mVrms

19

Total Circuit Current
Output Voltage
Weak Input Detection Output Voltage
S/N Ratio
THD
LED ON Sensitivity

Itot

(AM)

V

O (AM)

V

O (AMMIN)

mA
mV
mV

dBµ

%

dB

3.0
21
12
36

16

5.0
31
24

23

7.0
41

5.0
30

V

IN

= 26dBµ

V

i (AMLED)

IF Buffer Output 1

V

OIF1 (AM)

VCC=1.1V, VIN= 45dBµ,
No modulation

mVrms

29

43

57

IF Buffer Output 2

V

OIF2 (AM)

VCC=1.0V, VIN= 45dBµ,
No modulation

mVrms

15

AM IF Output Voltage

V

O (AM IF)

mVrms

15

30

60

V

IN

= 50dBµ, No modulation

Channel Balance
Separation
THD (Stereo)
Stereo LED ON Level
Stereo LED OFF Level

CB

Sep.

dB
dB

%
%
%

–2
22

0.8

0

35

4.8

1.9

2

5.0

7.0

Monaural Df= 75kHz
MPX Portion only L + R= 30%
L + R= 90%, Pilot= 10%
Pilot only
Pilot only