TLS1215
WIDE-BAND VIDEO PREAMPLIFIER SYSTEM WITH BLANKING
SLVS096A – OCTOBER 1995
N PACKAGE
(TOP VIEW)
• Wide Bandwidth . . . Typ 100 MHz at –3 dB
• 0-V to 4-V Digital Level-Contrast Control
Voltage Range
CONTRAST CAP1
CONTRAST CAP2
R GAIN ADJUST
R CLAMP(+)
1
28
27
26
25
24
23
22
21
20
19
18
• 0-V to 4-V Digital Level-Gain Adjust Control
2
Voltage Range
V
R VIDEO OUT
3
CC1
• Individual Gain Adjust for Video Amplifiers
• Output-Stage Blanking
R VIDEO IN
R CLAMP CAP
G VIDEO IN
GND
V
4
CC1
GND
5
V
6
• Fewer Peripheral Components Required
CC2
V
Than for Competitive Systems
7
CC1
G CLAMP CAP
B VIDEO IN
B CLAMP CAP
GND
8
description
G VIDEO OUT
G CLAMP(+)
G GAIN ADJUST
9
10
11
The TLS1215 is a wide-band video preamplifier
system intended for high-resolution RGB
(red-green-blue) color monitors with blanking
control features. Each video amplifier (R, G, and
B) contains a gain set for adjusting maximum
system gain. The TLS1215 provides digital
V
CC1
CONTRAST 12
BLANK GATE 13
CLAMP GATE 14
17 B VIDEO OUT
16 B CLAMP(+)
15 B GAIN ADJUST
level-operated contrast, brightness, and gain adjustment. All the control inputs offer high input impedance and
an operation range from 0 V to 4 V for easy interface to the serial digital buses. The TLS1215 also contains a
blanking circuit, which clamps the video output voltage during blanking period to as low as 0.2 V above ground.
The device operates from a 12-V supply. The TLS1215 is characterized for operation from 0°C to 70°C.
functional block diagram
23
V
4
CC2
R VIDEO IN
A1
A2
26
5
R VIDEO OUT
R CLAMP CAP
28
R GAIN ADJUST
27
20
R CLAMP(+)
6
G VIDEO IN
A1
8
A2
G CLAMP CAP
G VIDEO OUT
18
G GAIN ADJUST
19
17
G CLAMP(+)
9
B VIDEO IN
A1
10
15
A2
B CLAMP CAP
B VIDEO OUT
B GAIN ADJUST
12
Contrast
CONTRAST
16
1
B CLAMP(+)
CONTRAST CAP1
CONTRAST CAP2
2
3, 11, 22, 25
V
CC1
14
13
CLAMP GATE
BLANK GATE
7, 21, 24
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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