SGS-THOMSON STV8225 Technical data

查询STV8225供应商

.

SOUND AM SYNCHRONOUS DEMODULATOR

.

AM/FMAUDIO SWITCH

.

AV/TVAUDIO SWITCH

.

MUTE INPUT

STV8225

AM SIF CIRCUIT

DESCRIPTION

The STV8225 is intended for the demodulation of
the AM soundof the L standard.

Used as an add on to the STV8224 it permits to
design a multistandard set with the needed
switchesfor one SCART plug.

PINCONNECTIONS

IF INPUT

AGC CAPACITOR

GND

LEVEL SWITCH

FM SOUNDINPUT

1
2
3
4
5

14
13
12
11
10

DIP14

(Plastic Package)

ORDER CODE : STV8225

IF INPUT
MEANCAPACITOR
V

CC

EXTERNALSOUND INPUT
SWITCHINGINPUT

February 1995

MUTE INPUT

MAINSOUNDOUTPUT

6
7

EXTERNALSOUND OUTPUT

9

NOTTO BE CONNECTED

8

8225-01.EPS

1/6

STV8225

BLOCK DIAGRAM

14

IF INPUT

1

AGC

Mean

Capacitor

Level

Switch

41213

LOGIC

CONT

V

CC

MUTE

STV8225

A
B

SW1

C
A

SW2

7

Main Sound Output

5

FM Sound Input

9

External Sound Output

11

External Sound Input

23

AGC
Capacitor

10

Switching

Input

6

Mute
Input

ABSOLUTEMAXIMUMRATINGS

Symbol Parameter Value Unit

V

CC

T

stg

T

oper

P

tot

Supply Voltage 13 V
Storage Temperature -40, +150
Operating Temperature 0, +70
Power Dissipation 0.35 W

THERMAL DATA

Symbol Parameter Value Unit

R

th (j-a)

ELECTRICAL CHARACTERISTICS (VCC=9V,VIN=10mV

m = 54% modulation depth,Audio BW = 40Hz to 15kHz, T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

CC

I

CC

IF AMPLIFIER

Ri 1, 14 Input Resistance (Pins 1-14) Resistancebetween Pin 1 and 14 2 kΩ
Ci 1, 14 Input Capacitance (Pins 1-14) Capacitance between Pin1 and 14 2 pF
VIF min Minimum IF Input Signal IF input signal for V

VIF max Maximum IF Input Signal IF input signal for V

DAV AGC Range DAV = VIF max / VIF min 61 dB

l

AGC

Junction-ambient Thermal Resistance Max. 90

RMS,fSC

amb

=32.4MHz, fM=1kHz,

=25oC, unless otherwisespecified)

Supply Voltage Pin 12 8 9 10 V
Supply Current Pin 12 20 30 mA
Supply Voltage Rejection Pins 9, 7, 12 - V

Maximum AGC Output Current

Charging and discharging ±35 ±50 ±65 µA

= 0.5VPP, f = 100Hz 45 53 dB

Ripple

OUT=VNOM
OUT=VNOM

-3dB 70 µV
+ 1dB 75 mV

(Pin 2)
IF Bandwidth -3dB 50 MHz

o
o

o

C/W

8225-02.EPS

C
C

8225-01.TBL

8225-02.TBL

RMS

RMS

8225-03.TBL

2/6

STV8225

ELECTRICAL CHARACTERISTICS (continued)(VCC=9V,VIN=10mV

m =54% modulation depth, Audio BW = 40Hzto 15kHz, T

=25oC, unless otherwise specified)

amb

RMS,fSC

=32.4MHz, fM=1kHz,

Symbol Parameter Test Conditions Min. Typ. Max. Unit

AM DEMODULATOR

AF Output Voltage(Pins 7-9) Level switch (Pin 4) open

Level switch (Pin 4) connected to GND

AF Bandwidth (Pins 7-9)

-3dB versus nominal signal
Lower Limit
Upper Limit

200
400

50

250
500

300

mV
mV

600

40 Hz

Harmonic Distorsion (Pins 7-9) THD + Noise 0.7 1.8 %
S/N (Pins 7-9) Weighted according to CCIR 468-4 55 dB

MUTE

Threshold Level (Pin 6) Mute mode if voltage below threshold 0.2 0.3 0.4 V
Attenuation (Pins 7-9) Level switch (Pin 4) connected to GND

80 96 dB

TV - AM mode

AUDIO SWITCHES

Switching Voltage (Pin 10) Operation mode

TV

FM

0V V

TV

AM

Viev1

View1 Level 1 (Pin 10) For voltage below this level

AV
AM

Viev2

AV
FM

V

Viev3

CC

10

1.8 2.3 2.6 V

TV-FM mode : Pin 7 connected to A

Pin 9 connected to C

View2 Level 2 (Pin 10) For voltage below this level

4.1 4.6 4.9 V

TV-AM mode : Pin 7 connected to A

Pin 9 connected to A

View3 Level 3 (Pin 10) For voltage below this level

6.4 6.8 7.2 V

AV-AM mode : Pin 7 connected to B

Pin 9 connected to A
For voltage above this level
AV-FM mode : Pin 7 connected to B

Pin 9 connected to C

Input Current (Pin 10) Source current 0.3 2 µA
Input Dynamic Range (Pins 5-11) 2 V
InputResistance (Pins5-11) 35 50 kΩ
Switch Gain V

=2V

IN

Pin 7 vs Pin 11 and Pin 9 vs Pin 5

, f = 1kHz

RMS

-0.6 -0.1 0.4 dB

Crosstalk f = 1kHz 70 85 dB
Output Resistance (Pins7-9) 70 100 130 Ω
Output Current Source (Pins 7-9) 1 mA
Switch Distorsion V

=2V

IN

Pin 7 vs Pin 11 and Pin 9 vs Pin 5

, f = 1kHz, THD+ Noise,

RMS

0.1 0.5 %

Output Noise Unweighted 7 20 µVp
DC Plop at AF Output Pin 10 50 mV

RMS
RMS

kHz

8225-03.EPS

RMS

8225-04.TBL

3/6

STV8225

APPLICATIONDIAGRAM

STV8224- STV8225

External

Sound

Input

Sound

Output

C9

C8

10µF

R11

10µF

220Ω

891011121314

C22

C23

CVBS

Output

Q2

BC547

R18

R12

TRAP FILTER

(5.5MHz - 6.5MHz)

2.2kΩ

(to SCART)

75Ω

L6

R9

560Ω

CF3

8.2µH

Volume

Sound

Output

Switched

R32

C6

4.7µF

10µF

C7

10µF

68nF

Control

10kΩ

C31

100nF

SW1

Mute

1314

CVBS

External

C30

Input

470nF

R29

CVBS

Ouput

75Ω

C27

470nF

+9V

R19

R28

1kΩ

R10

22Ω

+9V

SW4

BC547

STD

R26

3.9kΩ

4.7kΩ

Q3

C11

L7

R25

2.7kΩ
R27

1.8kΩ
R20

1kΩ

1.8kΩ

C24

1nF

R24

4.7kΩ

R21

C26

Level

C12

47µF

100nF

Switch

1617181920 1521222324

100nF

IC1 STV8225

C32

BFP

10nF

D2

CF1

5.5MHz

C28

C17

1µF

C10

22µF

C13

3.3µH

L STD

FILTER

SOUND SAW

IF2

10µF

1234567

L4

C21

3.3µH

BGDKL

FILTER

VIDEO SAW

IF1

C20

47µF

100nF

IC2 STV8224

C19

47nF

1µF

C18

P1

10kΩ

AGC

Tuner

Delay

27kΩ

R14

Q4

LC1

123456789101112

9V

C33

BC337

C25

1µF

38.9MHz
C29

10nF

L5

3.3µH

C14

4.7nF

R13

68Ω

C15

680nF

10µF

DZ1

BZX55C

9V6

1N4148

68pF

Voltage

Switching

BFP

D1

CF2

6.5MHz

1N4148

R22

150Ω

4/6

Tuner AGC

C16

Output

R35

15Ω

R34

47µF

R15

6.8kΩ

12V

390Ω

100kΩ

AFC

R16

Output

100kΩ

8225-06.EPS

R17

9V

INPUT/OUTPUTPINS CONFIGURATION

SC_IN CONTROL SC_OUT

V

CC

10

STV8225

91112

C_MEAN

IF1

IF2

C_AGC

13

14

1

2

2.7V

1kΩ

(charge)

4.2V

I

5kΩ

1kΩ

C

µA

5

V

CC

µA

50µA

125

V

CC

µA

250

µA

250

6.4V

V

REF

4.3V

50kΩ

V

REF

4.3V

10µA

50µA

1mA

100

Ω

V6.4

8

(if used)

1.3kΩ26kΩ

6.0V

µA

125

V

CC

100Ω

7

AUDIO

µA

1mA

250

µA

5

V

CC

50µA

V
6V

CC

V

CC

114kΩ

I

D

(discharge)

100µA

3

GND

4

LSW

50kΩ

V

66kΩ

REF

4.3V

5

FM_IN

10µA

6

STV8225

MUTE

8225-04.EPS

5/6

STV8225

PACKAGE MECHANICAL DATA

14 PINS - PLASTICDIP

Dimensions

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

a1 0.51 0.020

B 1.39 1.65 0.055 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 15.24 0.600

F 7.1 0.280

i 5.1 0.201

L 3.3 0.130

Z 1.27 2.54 0.050 0.100

Information furnishedis believed to be accurateand reliable. However, SGS-THOMSON Microelectronicsassumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third partieswhich may result
from its use. No licence is granted by implication or otherwise underany patent or patentrights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previouslysupplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.

 1995 SGS-THOMSON Microelectronics - All RightsReserved

Purchase of I

2

I

C Patent. Rights to use these components in a I2C system, is granted provided that the system conformsto

Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan- Korea - Malaysia - Malta - Morocco

The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.

2

C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips

2

the I

C Standard Specifications as defined by Philips.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

PM-DIP14.WMF

DIP14.TBL

6/6

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