STV2112B datasheet(11/24 Pages) STMICROELECTRONICS

11 / 24 page

ELECTRICAL CHARACTERISTICS (VCC =9V, Tamb =25

oC, unless otherwise specified) (continued)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

RGB OUTPUTS (Pins 27-28-29) (continued)

Track

Tracking between Luminance and

Chrominance Signals

From Max. contrast (0dB)

to -10dB contrast

2dB

Bwidth

Bandwith of Output Signals at -3dB

- CVBS Input (no SVHS) PAL

- CVBS Input(no SVHS) SECAM

- Y Input SVHS Mode

- RGB Inputs

fOSC = 4.43MHz, Sharp Typ.

fOSC = 4.43MHz, no sharp

No trap Filter, Sharp Typ.

3.6

3.0

MHz

S/N

Signal to Noise Ratio of Output (VPP/VRMS)

4.43MHz PAL Signal

on Y/CVBS Input

No signal on R-Y, B-Y inputs

Contrast Max., Drive Max.,

Saturation Typ., Sharp Typ.,

Bandwidth 5MHz

Res

Residual Frequency at fOSC

at 2 fOSC and Higher Harmonics

PAL/SECAM

100

mVPP

FILTERS

VTUN1

Tuning Voltage Range (Pin 8)

3.2 to 4.8

VTUN2

Cloche Tuning Voltage Range (Pin 9)

2.5 to 6.5

Y DELAY LINE

td1p

Delay Time PAL

SVHS mode

330

370

400

td2

Delay Time SECAM

SVHS mode

500

540

580

td3p

Delay Time PAL

CVBS mode

390

425

460

td4

Delay Time SECAM

CVBS mode

550

590

630

SHARPNESS CIRCUIT (PAL only)

fSharp

Center Frequency

SVHS mode

2.5

MHz

GSharp

Gain Variation from Min. to Max. Sharp

at fSharp

6dB

Overshoot

Amplitude Variation compared to B/W

2T pulse, Sharp Max.

150

Pre-shoot

Amplitude Variation compared to B/W

2T pulse, Sharp Max.

-15

After-shoot Amplitude Variation compared to B/W

2T pulse, Sharp Max.

-40

Coring

Coring Range compared to B/W

Y TRAP FILTER

fTrap

Trap Frequency PAL

-0.2

fOSC

+0.2

MHz

Trap Frequency SECAM

-0.2

4.25

+0.2

MHz

QTrap

Trap Quality Factor

(Q=1/(fo/f-3dB - f-3dB/fo))

Sharpness Min.

Sharpness Max.

1.7

CRejPN

Color Subcarrier Rejection

PAL mode, Sharpness Min.

CrejS

Color Rejection SECAM Mode

at 4.1MHz

at 4.4MHz

CHROMINANCE BANDPASS

Center Frequency

-0.25

fosc

+0.25 MHz

QBP

Bandpass Quality Factor

2.8

3.5

4.2

CLOCHE FILTER

fCloche

Resonant Frequency

4.286

MHz

QCloche

Cloche Quality factor

ACC CAPACITOR (Pin 5)

IC5

Charging Current

During burst gate window

250

µA

IL5

Leakage Current

0.2

µA

CHROMA PLL (Pins 2-3)

CR2-3

Catching Range

Q = 4.43MHz (Pin 3)

±600

STV2112B

11/24

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