TDA3845T datasheet(6/18 Pages) PHILIPS

Part #	TDA3845T

Description	Quasi split-sound circuit and AM demodulator

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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6 / 18 page

January 1993

6

Philips Semiconductors

Objective speciﬁcation

Quasi split-sound circuit and AM

demodulator

TDA3845; TDA3845T

AF signal performance (note 8)

(S +W)/W

black picture

60/58

68/64

−

dB

(S +W)/W

2T/20T pulses with white bars

57/55

60/58

−

dB

(S +W)/W

6 kHz sinewave

(black-to-white modulation)

53/51

57/55

−

dB

(S +W)/W

250 kHz square wave

(black-to-white modulation)

50/44

56/50

−

dB

AM mode (standard L) note 9

S/N weighted in accordance with CCIR 468-3

V6(RMS)

AF output signal (RMS value)

440

550

660

mV

BAF

AF bandwidth

−3 dB; note 12

0.02

−

120

kHz

THD

total harmonic distortion

−

12%

(S +W)/W

signal-to-weighted-noise ratio

note 10

50

56

−

dB

R6

output resistance

−

200

−Ω

V6

DC potential

−

1.8

−

V

I6(peak)

permissible AC output current

(peak value)

note 7

−−±0.3

mA

I6

permissible DC output current

−−−1mA

Standard switch (note 4)

V7

peak signal AGC (FM mode)

VP1 used

1.8

−

VP1

V

V7

or switch open-circuit

VP2 used

1.8

−

5.5

V

V7

mean signal AGC (AM mode)

−−

0.8

V

I7

switch current

at 0 V

−−−200

µA

at VP1

−−

10

µA

at VP2

via a 2.2 k

Ω series resistor

−−

2.5

mA

Ripple rejection (note 13)

AM/AF signal

αRR

voltage ripple on VP/

voltage ripple on output signal

30

40

−

dB

FM phase noise

∆f(RMS)

intercarrier signal

−

10

20

Hz

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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TDA3845T Datasheet(PDF) 6 Page - NXP Semiconductors

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