TDA3853T datasheet(8/18 Pages) PHILIPS

部件名	TDA3853T

功能描述	TV IF amplifier and demodulator with TV-identification

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制造商	PHILIPS [NXP Semiconductors]

网页	http://www.nxp.com

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8 / 18 page

January 1992

8

Philips Semiconductors

Preliminary speciﬁcation

TV IF ampliﬁer and demodulator with

TV-identiﬁcation

TDA3853T

CVBS buffer ampliﬁer (pins 12 and 13)

R13

input resistance

−

3.3

−

k

Ω

C13

input capacitance

−

2

−

pF

Vo CVBS

typical CVBS output signal on pin 14

(peak-to-peak value)

note 4

−

2

−

V

CVBS output level

upper video clipping

−

4.25

−

V

lower video clipping

−

0.3

−

V

sync level

−

1.35

−

V

I12

output current

DC and AC

−−

±1mA

R12

output resistance

−−

10

Ω

Gv

voltage gain

note 4

6.5

7

7.5

dB

B

−3 dB video bandwidth

C14 < 20 pF

tbn

14

−

MHz

RR

ripple rejection on pin 12

fripple = 70 Hz; note 3

tbn

35

−

dB

Measurements from IF input to CVBS output (pin 12)

Vo CVBS

typical CVBS output signal on pin 12

(peak-to-peak value)

Fig.10

1.7

2

2.3

V

∆Vo

deviation of CVBS output signal at B/G

50 dB gain control

−−

0.5

dB

30 dB gain control

−

0.1

−

dB

∆G

differential gain

10 to 90% modulation

−

25%

∆ϕ

differential phase

10 to 90% modulation

−

25

o

tiltH

horizontal tilt

−

0.7

1.5

%

B

−2 dB video bandwidth

CL < 20 pF

tbn

12

−

MHz

S/N

signal-to-noise ratio

note 5; Fig.5

−

58

−

dB

α1.1

intermodulation at “blue”, note 6

f = 1.1 MHz; Fig.8

56

58

−

dB

intermodulation at “yellow”

f = 1.1 MHz

53

56

−

dB

α3.3

intermodulation at “blue”

f = 3.3 MHz

62

−−

dB

intermodulation at “yellow”

f = 3.3 MHz

60

−−

dB

α1H

residual vision carrier (RMS value)

fundamental wave

−

110

mV

α2H

second harmonic

−

110

mV

αspur

suppression of spurious video signal

harmonics

transformer; Fig.4

22

26

−

dB

RR

ripple rejection on pin 12

fripple = 70 Hz; note 3

tbn

30

−

dB

AGC detector (pin 18)

Tresp

response to an increasing amplitude step

of 50 dB in input signal

−

110

ms

response to a decreasing amplitude step

of 50 dB in input signal

−

150

300

ms

V18

gain control voltage on capacitor

full gain range

1.5

−

4V

I18

peak charging current (peak value)

−−2

−

mA

charging current

−−0.5

−

mA

discharging current

−

11

−µA

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