TLS1255

VIDEO PREAMPLIFIER SYSTEM

WITH ONSCREEN DISPLAY (OSD) MIXER

SLVS142 − DECEMBER 1996

3

POST OFFICE BOX 655303

POST OFFICE BOX 1443

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC1 and VCC2

11

12

13

V

High-level input voltage range, CLAMP GATE, VIH

Clamp comparators off

2.4

5

V

Low-level input voltage range, CLAMP GATE, VIL

Clamp comparators on

0

0.8

V

High-level input voltage range, BLANKING, VIH

Blanking circuit inactive

2.4

5

V

Low-level input voltage range, BLANKING, VIL

Blanking circuit active

0

0.8

V

High-level input voltage range, OSD BLANKING, VIH

OSD Blanking circuit inactive

2.4

5

V

Low-level input voltage range, OSD BLANKING, VIL

OSD Blanking circuit active

0

0.8

V

Operating free-air temperature, TA

0

70

°C

electrical characteristics at 25

R,G,B CLAMP(+) = 2 V; BLANKING = OSD BLANKING = 4 V; CONTRAST = R, G, B GAIN

PARAMETER

ALTERNATE

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICC

Supply current

VCC1 + VCC2

110

130

mA

Vref

Video input reference voltage

Measure R,G,B VIDEO_IN voltage

1.6

1.8

2.1

V

IIL

CLAMP GATE low input current

CLAMP GATE = 0 V

− 0.5

−8

µA

IIH

CLAMP GATE high input current

CLAMP GATE = 12 V

0.005

1

µA

Clamp-capacitor charge current

IK(chg)

R,G,B CLAMP CAP = 0 V

850

µA

Clamp-capacitor discharge current

IK(dschg)

R,G,B CLAMP CAP = 5 V

− 850

µA

VOL

Low-level output voltage

R,G,B CLAMP CAP = 0 V

0.2

0.6

V

VOH

High-level output voltage

R,G,B CLAMP CAP = 5 V

6.7

7.6

V

Video output blanked voltage

VO(BLANK)

BLANKING = 0 V;

R,G,B CLAMP(+) = 3 V

0.2

0.35

V

High-level output voltage, OSD

VO(OSD BLANK)

OSD BLANKING = 0 V,

VO(PP)(OSD) = 4 V

0.8

V

Output voltage difference

VODIFF

Between any two channels

50

mV

Spot-killer voltage

VSPOT

VCC adjusted to active

8.2

10.3

V