TDA4445A datasheet(3/8 Pages) TEMIC

No de pièce	TDA4445A

Description	Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator

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Fabricant	TEMIC [TEMIC Semiconductors]

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TELEFUNKEN Semiconductors

TDA4445A/TDA4445B

Rev. A1: 14.09.1995

3 (8)

Electrical Characteristics

VS = 12 V, Tamb = + 25°C, reference point pin 13, unless otherwise specified

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

Supply current

V1–16 = 10 mV

or V3= 3.5 V

Pin 11

IS

60

mA

DC output voltage

V 1–16 = 10 mV,

unmodulated

Pin 12

VO

5.0

V

DC output current

V11 = 7.5 V,

V3 = 3.5 V

Pin 12

Imax

1.8

V

Input impedance

Pin 1–16

R

C

1.6

2.0

k

W

PF

Switch off control voltage

VTR mode

Pin 3

V

8

10

V

Switch off control current

VTR mode

Pin 3

I

50

150

mA

Quasi Parallel Sound Operation

fPC = 38.9 MHz, fSC1 = 33.4 MHz, fSC2 = 33.16 MHz, PC/SC = 13 dB, PC/SC2 = 20 dB,

PC unmodulated (equivalent to sync. peak current)

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

Minimum input voltage

5.5 MHz output signal

–3dB

Pin 1–16

vi

50

mV

Maximum input voltage

5.5 MHz output signal

+1 dB

Pin 1–16

vi

80

mV

IF AGC range

∆GIF

64

dB

AGC capacitor

control time constant, Pin 3

C3

0.33

10

mF

Sound-IF-output voltage V1–16= 10 mV, SC unmodulated

5.5 MHz output voltage

Pin 12

vi

250

mV

5.74 MHz output voltage

i

110

Signal to noise ratio: measured according to CCIR 468–2

reference signal: v1–16 = 10 mV, FM-frequency deviation = +30 kHz

fmod = 1 kHz, measured at audio-output sound IF demodulator U2829B

1. Channel/ 2. Channel

Standard B/G modulated IF signal

(residual carrier 10%)

Black screen

Pin 12

Grid pattern

S+N

N

62/58

52/49

dB

Bistandard Operation

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

IF AGC range

∆GIF

64

dB

AGC capacitor

(control time constant)

Pin 3

Pin 5

C3

C5

10

4.7

mF

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