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TLS1215
WIDE BAND VIDEO PREAMPLIFIER SYSTEM WITH BLANKING
SLVS096A − OCTOBER 1995
•
•
•
•
•
•
Wide Bandwidth . . . Typ 100 MHz at − 3 dB
0-V to 4-V Digital Level-Contrast Control
Voltage Range
0-V to 4-V Digital Level-Gain Adjust Control
Voltage Range
Individual Gain Adjust for Video Amplifiers
Output-Stage Blanking
Fewer Peripheral Components Required
Than for Competitive Systems
N PACKAGE
(TOP VIEW)
description
The TLS1215 is a wide-band video preamplifier
11
18
system intended for high-resolution RGB
12
17
(red-green-blue) color monitors with blanking
13
16
control features. Each video amplifier (R, G, and
14
15
B) contains a gain set for adjusting maximum
system gain. The TLS1215 provides digital
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.
CONTRAST CAP1
CONTRAST CAP2
V
CC1
R VIDEO IN
R CLAMP CAP
G VIDEO IN
GND
G CLAMP CAP
B VIDEO IN
B CLAMP CAP
V
CC1
CONTRAST
BLANK GATE
CLAMP GATE
1
2
3
4
5
6
7
8
9
10
28
27
26
25
24
23
22
21
20
19
R GAIN ADJUST
R CLAMP(+)
R VIDEO OUT
V
CC1
GND
V
CC2
V
CC1
GND
G VIDEO OUT
G CLAMP(+)
G GAIN ADJUST
B VIDEO OUT
B CLAMP(+)
B GAIN ADJUST
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.
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.
Copyright
1995, Texas Instruments Incorporated
POST OFFICE BOX 655303
POST OFFICE BOX 1443
•
HOUSTON, TEXAS 77251−1443
•
DALLAS, TEXAS 75265
1
TLS1215
WIDE BAND VIDEO PREAMPLIFIER SYSTEM WITH BLANKING
SLVS096A − OCTOBER 1995
functional block diagram
R VIDEO IN
R CLAMP CAP
R GAIN ADJUST
4
5
28
27
G VIDEO IN
G CLAMP CAP
G GAIN ADJUST
6
8
18
A1
A2
20
G VIDEO OUT
23
A1
A2
26
VCC2
R VIDEO OUT
R CLAMP(+)
19
B VIDEO IN
B CLAMP CAP
B GAIN ADJUST
CONTRAST
CONTRAST CAP1
CONTRAST CAP2
CLAMP GATE
BLANK GATE
9
10
15
12
1
2
14
13
A1
A2
17
G CLAMP(+)
B VIDEO OUT
Contrast
16
3, 11, 22, 25
7, 21, 24
B CLAMP(+)
VCC1
GND
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
•
TLS1215
WIDE BAND VIDEO PREAMPLIFIER SYSTEM WITH BLANKING
SLVS096A − OCTOBER 1995
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.5 V
Input voltage range, V
I
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V
CC
Video output current (per channel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 mA
Total power dissipation at (or below) 25°C free-air temperature (see Note 2) . . . . . . . . . . . . . . . . . . . . . 2.1 W
Operating virtual junction temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Operating free-air temperature range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All VCC pins must be externally wired together to prevent internal damage during VCC power-on/off cycles.
2. For operation above 25°C free-air temperature, derate linearly to 1.5 W at the rate of 13 mW/°C.
recommended operating conditions
MIN
Supply voltage, VCC1 and VCC2
High-level input voltage, CLAMP GATE, VIH
Low-level input voltage, CLAMP GATE, VIL
High-level input voltage, BLANK GATE, VIH
Low-level input voltage, BLANK GATE, VIL
Operating free-air temperature, TA
Clamp comparators off
Clamp comparators on
Blanking circuit inactive
Blanking circuit active
10.8
2.4
0
2.4
0
0
NOM
12
MAX
13.2
5
0.8
5
0.8
70
UNIT
V
V
V
V
V
°C
electrical characteristics at 25°C operating free-air temperature range, CLAMP GATE = 0 V,
BLANK GATE = 4 V, CLAMP(+) = 2 V, CONTRAST = R, G, B GAIN ADJUST = 4 V,
V
CC1
= V
CC2
= 12 V (see Figure 2) (unless otherwise noted)
PARAMETER
ICC
Vref
II
IIL
IIH
Supply current
Video input reference voltage
Contrast, R, G, B gain adjust
input current
Clamp gate low input current
Clamp gate high input current
Clamp capacitor charge current
Clamp capacitor discharge current
VOL
VOH
VO(blanked)
VO(diff)
Low-level output voltage
High-level output voltage
Blanked output voltage
Output voltage difference
VOdiff
IK(chg)
IK(dschg)
II
ALT SYMBOL
TEST CONDITIONS
VCC1 + VCC2
Measure R, G, B VIDEO IN
Measure CONTRAST and
B, G, R GAIN ADJUST
CLAMP GATE = 0 V
CLAMP GATE = 5 V
R, G, B CLAMP CAP = 0 V
R, G, B CLAMP CAP = 5 V
R, G, B CLAMP CAP = 0 V
R, G, B CLAMP CAP = 5 V
Blanking circuit active
Between any two channels
MIN
78
2.1
TYP
90
2.3
−1
−1
0.03
−850
+ 850
0.3
7.8
0.2
±
0.5
±
50
MAX
100
2.6
−2.5
−2.5
1
UNIT
mA
V
µA
µA
µA
µA
µA
V
V
V
mV
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
•
3
TLS1215
WIDE BAND VIDEO PREAMPLIFIER SYSTEM WITH BLANKING
SLVS096A − OCTOBER 1995
operating characteristics at 25°C free-air temperature range, CLAMP GATE = 0 V,
BLANK GATE = 4 V, CLAMP(+) = 4 V, CONTRAST = R, G, B GAIN ADJUST = 4 V, f
I
= 10 kHz (unless
otherwise noted)
PARAMETER
AV(max)
AV(mid)
Maximum voltage
amplification
Mid-range voltage
amplification
Contrast voltage for mini-
mum amplification
Amplification match at
AV(max)
Amplification match at
AV(mid)
Amplification match at
AV(low)
THD
BW
Total harmonic distortion
Amplifier bandwidth
ALT SYMBOL
AVMAX
AVMID
VCONTRASTLOW
AVMAX(DIFF)
AVMID(DIFF)
AVLOW(DIFF)
THD
BW(−3 dB)
TEST CONDITIONS
CONTRAST = 4 V,
VI(PP) = 700 mV
CONTRAST = 2 V,
VI(PP) = 700 mV
VI(PP) = 1 V,
See Note 3
MIN
TYP
7.8
2
1
±
0.2
±
0.2
±
0.2
1.0%
100
80
40
4
ns
7
MHz
dB
dB
MAX
UNIT
V/ V
V/ V
V
dB
dB
dB
CONTRAST = 4 V, See Note 4
CONTRAST = 2 V, See Note 3
CONTRAST = VCONTRASTLOW,
See Notes 3 and 4
CONTRAST = 1 V, VI(PP) = 1 V
CONTRAST = 4 V,
See Notes 5 and 7
CONTRAST = 4 V, f = 10 kHz,
See Note 6
Crosstalk attenuation
ax
CONTRAST = 4 V, f = 10 MHz,
See Notes 6 or 7
VO(PP) = 4 V,
Clamp(+) = 2 V,
CONTRAST = 4 V,
See Notes 5 and 7
Tr, video
Tf, video
Pulse test
Tr, blank
Tf, blank
CONTRAST = 4 V , Clamp(+) = 2 V,
See Notes 5 and 7
NOTES: 3.
4.
5.
6.
7.
Determine VCONTRASTLOW for − 40 dB attenuation of output. Reference to AV maximum.
Measure gain difference between any two amplifiers, VI(PP) = 1 V.
Adjust input frequency from 10 kHz (AV maximum ref level) to the − 3 dB corner frequency (f −3 dB). VI(PP) = 700 mV.
VI(PP) = 700 mV at f = 10 kHz to any amplifier. Measure output levels of the other two undriven amplifiers relative to driven amplifier.
A special text fixture without a socket and a double-sided full-ground-plane PC board are required.
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
•
RF/Wirelessly
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