TDA9812 datasheet(13/32 Pages) PHILIPS

13 / 32 page

1995 Mar 21

Philips Semiconductors

Preliminary speciﬁcation

Multistandard VIF-PLL and

FM-PLL/AM demodulator

TDA9812

PSRR

power supply ripple rejection at

pin 10

video signal; grey level;

see Fig.16

B/G standard

−

L standard

−

VIF-AFC detector (pin 28)

I28

charging current

B/G and L standard;

note 10

0.75

1.25

additional charging current

L standard in event of

missing VITS pulses and

no white video content

1.9

2.5

3.1

µA

discharging current

B/G standard

µA

normal mode L

225

300

375

fast mode L

µA

tresp

AGC response to an increasing

VIF step

B/G and L standard;

note 13

−

0.05

0.1

ms/dB

AGC response to a decreasing

VIF step

B/G standard

−

2.2

3.5

ms/dB

fast mode L

−

1.1

1.8

ms/dB

normal mode L; note 13

−

150

240

ms/dB

∆IF

VIF amplitude step for activating

fast AGC mode

L standard

−2

−6

−10

threshold voltage level

additional charging current

see Fig.13

L standard

−

1.95

−

L standard; fast mode L

−

1.65

−

Tuner AGC (pin 19)

Vi(rms)

IF input signal voltage for

minimum starting point of tuner

take-over (RMS value)

input at pins 1 and 2;

RTOP =22kΩ;

I19 = 0.4 mA

−

25mV

IF input signal voltage for

maximum starting point of tuner

take-over (RMS value)

input at pins 1 and 2;

RTOP =0 Ω; I19 = 0.4 mA

100

V19

permissible output voltage

from external source;

note 2

−−

13.2

saturation voltage

I19 = 1.5 mA

−−

0.2

∆V19

variation of take-over point by

temperature

I19 = 0.4 mA

−

0.03

0.07

dB/K

I19(sink)

sink current

no tuner gain reduction;

see Figs 5 and 6

V19 =12V

−−

2.5

µA

V19 = 13.2 V

−−

µA

maximum tuner gain

reduction

1.5

2.6

∆GIF

IF slip by automatic gain control

tuner gain current from

20 to 80%

−

68dB

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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