TLS1233
VIDEO PREAMPLIFIER SYSTEM
SLVS126C – JULY 1995 – REVISED JUNE 1996
N PACKAGE
(TOP VIEW)
Wide Bandwidth . . . Typ 100 MHz at –3 dB
Three Channels
0 V to 4 V, Digital Level-Contrast Control
0 V to 4 V, Digital Level-Gain Adjust Control
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
R CLAMP(+)
G CLAMP(+)
V
B CLAMP(+)
CC1
20-Pin Plastic DIP for Small PCB Area
Required
R VIDEO IN
R CLAMP CAP
G VIDEO IN
GND
R VIDEO OUT
R GAIN ADJUST
V
Fewer Peripheral Components Required
Than for LM1203 Applications
CC2
G VIDEO OUT
G GAIN ADJUST
B VIDEO OUT
B GAIN ADJUST
CLAMP GATE
G CLAMP CAP
B VIDEO IN
B CLAMP CAP
CONTRAST
Independent CLAMP(+) Adjustment to Each
Channel
description
The TLS1233 is a 100-MHz wide-band video preamplifier system intended for mid-to-high-resolution RGB
(red-green-blue) color monitors. Each video amplifier (R, G, and B) contains a gain set for adjusting maximum
system gain (A = 7.8 V/V). The TLS1233 provides digital level-operated contrast, brightness, and gain
V
adjustment control. 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. Provided in a 20-pin plastic dual-in-line package (DIP), the TLS1233
integrates most of the external components required to accommodate the video system.
The TLS1233 operates from a 12-V supply and contains an internal input bias voltage. Also, the TLS1233
contains the feedback resistor required between output and CLAMP(–) for dc level holding. The device is
characterized for operation from 0°C to 70°C.
functional block diagram
16
V
3
CC2
A1
R VIDEO IN
A2
4
18
1
R CLAMP CAP
R VIDEO OUT
R CLAMP(+)
17
R GAIN ADJUST
5
G VIDEO IN
A1
A2
7
G CLAMP CAP
15
20
G VIDEO OUT
G CLAMP(+)
14
G GAIN ADJUST
8
B VIDEO IN
A1
A2
9
B CLAMP CAP
13
19
B VIDEO OUT
B CLAMP(+)
12
B GAIN ADJUST
Contrast
Control
10
11
CONTRAST
CLAMP GATE
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 1996, 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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265