MC13281B [MOTOROLA]
80/100 MHz Video Processor; 80/100 MHz的视频处理器
| 型号： | MC13281B |
| 厂家： | 
MOTOROLA |
| 描述： | 80/100 MHz Video Processor |
| 文件： | 总12页 (文件大小：159K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by MC13280AY/D
80/100 MHz VIDEO
PROCESSOR
TheMC13280AYandMC13281A/Barethreechannelwidebandamplifiers
designed for use as a video pre–amplifier in high resolution RGB color
monitors.
Features:
• 4.0 Vpp Output Swing
• 3.5 ns Rise/Fall Time, 100 MHz Bandwidth (MC13281A/B)
• 4.3 ns Rise/Fall Time, 80 MHz Bandwidth (MC13280AY)
• Subcontrast Controls for Each Channel
• Main Contrast Control
24
P SUFFIX
PLASTIC PACKAGE
CASE 724
1
• Blanking and Clamping Inputs
• Packages: NDIP–24 and NDIP–20
• A Single PC Board Pattern Can Accept the MC13281A and the
20
P SUFFIX
PLASTIC PACKAGE
CASE 738
MC13282A (Video Amplifier with OSD)
1
PIN CONNECTIONS
ORDERING INFORMATION
Operating
Blank
1
2
24
R Subcontrast
R Input
Temperature Range
Device
MC13280AYP
MC13281AP
MC13281BP
Package
Plastic DIP
Plastic DIP
Plastic DIP
23 Clamp
G Subcontrast
G Input
3
22
21
20
19
18
17
R Emitter
R Clamp
4
T
A
= 0° to +70°C
V5
B Subcontrast
B Input
5
G Emitter
G Clamp
Video V
6
Gnd
7
8
N/C
CC
V
9
16 B Clamp
CC
B Emitter
10
11
15
14
13
N/C
N/C
ABSOLUTE MAXIMUM RATINGS
Rating
Fast Commutate
Pin
Value
Unit
N/C 12
Contrast
Power Supply Voltage
V
CC
–0.5, 10
–0.5, 10
Vdc
(Top View)
Video V
CC
Voltage at Video Amplifier Inputs
2, 4, 6
–0.5, +5.0
120
Vdc
mA
°C
1
2
3
4
5
6
7
8
9
20
R Subcontrast
R Input
Blank
Collector–Emitter Current (Three Channels) Video V
CC
19 Clamp
Storage Temperature
Junction Temperature
–
–
–65 to +150
150
G Subcontrast
18 R Emitter
17
G Input
B Subcontrast
B Input
R Clamp
°C
16 V5
NOTES: 1. Devices should not be operated at these limits. Refer to “Recommended
Operating Conditions” section for actual device operation.
15 G Emitter
14 G Clamp
2. ESD data available upon request.
Gnd
13
V
Video V
CC
CC
Contrast
12 B Clamp
Fast Commutate 10
11 B Emitter
(Top View)
This document contains information on a new product. Specifications and information herein
Motorola, Inc. 1996
Rev 0
are subject to change without notice.
MC13280AY MC13281A/B
RECOMMENDED OPERATING CONDITIONS
Characteristic
Power Supply Voltage
Pin
Min
Typ
Max
Unit
V
,
7.6
8.0
8.4
Vdc
CC
Video V
CC
Contrast Control
Contrast
1, 3, 5
Blank
0
0
0
0
–
–
–
5.0
5.0
5.0
5.0
1.0
Vdc
Vdc
V
Subcontrast Control
Blanking Input Signal Amplitude
Clamping Input Signal Amplitude
–
Clamp
2, 4, 6
–
V
Video Signal Amplitude
0.7
Vpp
(with 75 Ω Termination)
Collector–Emitter Current (Total for Three
Channels)
Video V
0
–
50
mA
CC
Clamp Pulse Width
Clamp
–
500
0
–
–
–
ns
Operating Ambient Temperature
70
°C
ELECTRICAL CHARACTERISTICS (Refer to Test Circuit Figure 1, T = 25°C, V
= 8.0 Vdc.)
A
CC
Pin
Characteristic
Input Impedance
Condition
Min
100
–
Typ
–
Max
Unit
kΩ
–
–
–
–
2, 4, 6
Internal DC Bias Voltage
Output Signal Amplitude
2.4
4.0
Vdc
Vpp
3.6
V2, V4, V6 = 0.7 Vpp
V1, V3, V5 = 5.0 V
Contrast = 5.0 V
R, G, B
Emitters
Voltage Gain
–
–
5.6
–
–
V/V
dB
Contrast Control
Contrast = 5.0 to 0 V
V1, V3, V5 = 5.0 V
Contrast
1, 3, 5
–26
Subcontrast Control
V1, V3, V5 = 5.0 to 0 V
Contrast = 5.0 V
–
–26
–
dB
Emitter DC Level
–
–
1.0
–
1.2
1.4
–
Vdc
V
Blanking Input Threshold
Clamping Input Threshold
Video Rise Time
–
Blank
Clamp
1.25
3.75
–
–
–
V
V2, V4, V6 = 0.7 Vpp
R, G, B
ns
MC13280AY
MC13281A/B
V
= 4.0 Vpp
Emitters
–
–
4.3
3.5
–
–
out
> 300 Ω, C < 5.0 pF
R
R
L
L
Video Fall Time
V2, V4, V6 = 0.7 Vpp
= 4.0 Vpp
R, G, B
Emitters
ns
MHz
mA
MC13280AY
MC13281A/B
V
–
–
4.3
3.5
–
–
out
> 300 Ω, C < 5.0 pF
L
L
Video Bandwidth
Power Supply Current
V2, V4, V6 = 0.7 Vpp
V1, V3, V5, Contrast = 5.0 V
R, G, B
Emitters
MC13280AY
MC13281A/B
–
–
80
100
–
–
R
> 300 Ω, C < 5.0 pF
L
L
V
CC
, Video V
= 8.0 V
CC
–
–
70
–
NOTE: It is recommended to use a double sided PCB layout for high frequency measurement (e.g., rise/fall time, bandwidth).
2
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
Figure 1. Internal Block Diagram
R Clamp
Fast Commutate
V
V
ref2
ref1
Video V
CC
R Input
R Emitter
R Subcontrast
Contrast
R Channel
Contrast and Subcontrast
Control Processor
G Clamp
V
V
ref2
ref1
G Input
G Emitter
Blank
Clamp Blank
Decoder
Clamp
G Subcontrast
Contrast and Subcontrast
Control Processor
G Channel
B Clamp
V
V
ref2
ref1
B Input
B Emitter
V
CC
B Channel
V5
B Subcontrast
Contrast and Subcontrast
Control Processor
Gnd
This device contains 272 active transistors.
3
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
PIN FUNCTION DESCRIPTION
MC13280AY
MC13281B
Pin
MC13281A
Pin
Name
Equivalent Internal Circuit
Description
1
3
5
2
1
3
5
2
R
These pins provides a maximum of
26 dB attenuation to vary the gain of
each video amplifier separately.
V
CC
Subcontrast
Control
50 k
Input voltage is from 0 to 5.0 V.
Increasing the voltage will increase
the contrast level.
G
5.0 V
Subcontrast
Control
B
Subcontrast
Control
R Input
G Input
B Input
Ground
The input coupling capacitor is used
for input clamping storage. The
maximum source impedance is 100 Ω.
V
ref
5.0 V
Clamp
Input polarity of the video signal is
positive.
4
6
4
6
7
0.1
Nominal 0.7 Vpp input signal is
recommended (maximum 1.0 Vpp).
75
Ω
10 k
1.0 k
7
Ground pin. Connect to a clean, solid
ground.
N/A
8
N/C
N/C
N/C
N/C
Connected to ground.
10
11
12
9
8
9
V
CC
Connect to 8.0 Vdc supply, ±5%.
Decoupling is required at this pin.
13
Contrast
Overall Contrast Control for the three
channels.
5.0 V
2.5 V
42 k
2.0 k
The input range is 0 V to 5.0 V. An
increase of voltage increases the
contrast.
10
11
14
15
Fast
Commutate
Must be connected to ground.
B Emitter
Output
The video outputs are configured as
emitter–followers with a driving
capability of about 15 mA each.
V
CC
Video
Signal
The dc voltage at these three emitters
is set to 1.2 V (black level).
15
18
19
22
G Emitter
Output
The dc current through the output
stage is determined by the emitter
resistors (typically 330 Ω).
Contrast
R
= 330
E
R Emitter
Output
Typical
4
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
PIN FUNCTION DESCRIPTION (continued)
MC13280AY
MC13281B
Pin
MC13281A
Pin
Name
Equivalent Internal Circuit
Description
12
14
17
13
16
18
21
17
B Clamp
Capacitor
A 100 nF capacitor is connected to
each of these pins.
1.2 V
The capacitor is used for video output
dc restoration.
Video Out
G Clamp
Capacitor
V
CC
R Clamp
Capacitor
Video V
Connect to 8.0 V dc supply, ±5%. The
CC
V
is for the video output stage. It is
CC
internally connected to the collectors
of the output transistors.
16
20
5.0 V (V5)
ref
5.0 V regulator. Minimum 10 µF
V
CC
capacitor is required for noise filtering
and compensation. It can source up
to 20 mA but not sink current. Output
impedance is ≈ 10 Ω. Recommended
for use as a voltage reference only.
Band Gap
Regulator
5.0 V
10
µF
R
0.8 R
19
23
Clamp
This pin is used for video clamping.
The threshold clamping level is 3.75 V.
V
V
CC
ref1
30 k
V
ref2
10 k
3.75 V
20
24
Blank
This pin is used for video blanking.
The threshold blanking level is 1.25 V.
V
V
CC
ref1
30 k
V
ref2
10 k
1.25 V
5
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
FUNCTIONAL DESCRIPTION
The MC13280AY and MC13281A/B are composed of
Contrast Control
three video amplifiers, clamping and blanking circuitry with
contrast and subcontrast controls. Each video amplifier is
designed to have a –3.0 dB bandwidth of 100 MHz
(MC13281, 80 MHz for the MC13280) with a gain of up to
about 5.6 V/V, or 15 dB.
The contrast control varies the gain of three video
amplifiers from a minimum of 0.3 V/V to a maximum of
5.6 V/V when all subcontrast levels are set to 5.0 V.
Subcontrast Control
Each subcontrast control provides a maximum of 26 dB
attenuation on each video amplifier separately.
Video Input
The video input stages are high impedance and designed
to accept a maximum signal of 1.0 Vpp with 75 Ω termination
(typically) provided externally. During the clamping period, a
current is provided to the input capacitor by the clamping
circuit which brings the input to a proper dc level (nominal
2.0 V). The blanking and clamping signals are to be provided
externally, with their thresholds at 1.25 V and 3.75 V,
respectively.
Clamp Pulse Input
The clamping pulse is provided externally, and the pulse
width must be no less than 500 ns.
Blank Pulse Input
The blanking pulse is used to blank the video signal during
the horizontal sync period, or used as a control pin for video
mute function.
Video Output
Fast Commutate
The video output stages are configured as emitter–
followers, with a driving capability of about 15 mA for each
channel. The dc voltage at these three emitters is set to 1.2 V
(black level). The dc current through each output stage is
determined by the emitter resistor (typically 330 Ω).
This pin should be connected to ground.
Power Supplies
V
and Video V
supplies are to be 8.0 V ±5%.
CC
CC
Figure 2. Test Circuit
8.0 V
Blank
Input
Clamp
Input
C15
0.1
C14
47
µF
Blank
Clamp
Fast
Commutate
Video
V
CC
V
CC
C1
0.1
R Output
R Input
G Input
B Input
R Emitter
R Input
G Input
C2
0.1
G Output
B Output
G Emitter
B Emitter
C3
0.1
B Input
R4
330
R5
330
R6
330
R1
75
R2
75
R3
75
MC13280AY
MC13281A/B
R Clamp
G Clamp
C13
0.1
C12
0.1
Gnd
V5
B Clamp
C11
0.1
Clamp Capacitor
Subcontrast Control
G
R
B
Contrast
C4
0.1
C5
10 µF
C7
0.1
C8
0.1
C10
0.1
C6
0.1
5.0 V
5.0 V
5.0 V
5.0 V
6
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
APPLICATION INFORMATION
PCB Layout
reduce the rise/fall time by increasing the driving current, but
the output stage may be damaged due to increasing power
dissipation at the same time. The frequency response is
affected by the loading capacitance. The typical value is 3.0
to 5.0 pF. Figure 3 shows a typical interface with a video
output driver. For high resolution color monitor application, it
is recommended to use coaxial cable or shielded cable for
input signal connections.
Care should be taken in the PCB layout to minimize the
noise effects. The most sensitive pins are V , Video V
,
CC
CC
V5 and Clamp. It is strongly recommended to make a ground
plane and connect V /Video V and ground traces, to the
CC
power supply directly. Separate power supply traces should
be used for V and Video V and decoupling capacitors
CC
CC CC
should be connected as close as possible to the device.
Multi–layer ceramic and tantalum capacitors are
recommended. V5 is designed as a 5.0 V voltage reference
for contrast, and RGB subcontrast controls, so the same
Clamp and Blank Input
The clamp input is normally (except for Sync–on–Green)
connected to a positive horizontal sync pulse and has a
threshold level of 3.75 V. It is used as a timing reference for
the dc restoration process, so it cannot be an open circuit. If
Sync–on–Green timing mode is used, the clamping pulse
should be located at the horizontal back porch period instead
of horizontal sync. Otherwise, the black level will be clamped
at the wrong dc level.
precautions for V
should also be applied at this pin. The
CC
Clamp capacitors should be connected to ground close to
IC’s ground pin, or power supply ground. The copper trace of
video signal inputs and outputs should be as short as
possible and separated by ground traces to avoid any RGB
cross–interference. A double sided PCB should be used to
optimize the device’s performance.
The blank input is used as a video mute, or horizontal
blanking control pin, and is normally connected to a blanking
pulse generated from the flyback or MCU. The threshold level
is 1.25 V. The blanking pulse width should be equal to the
flyback retrace period to make sure that the video signal is
blanked properly during retrace. It is necessary to limit the
amplitude and avoid any negative undershoot if the flyback
pulse is used. The blanking input pin cannot accept a
negative voltage. This pin should be grounded if it is not used.
RGB Input and Output
The RGB output stages are designed as emitter–followers
to drive the CRT driver circuitry directly. The emitter resistors
used are 330 Ω (typically) and the driving current is 15 mA
maximum for each channel. The loading impedance
connected to the output stages should be greater than 330 Ω
and less than 5.0 pF for optimum performance (e.g., rise/fall
time, bandwidth, etc.). Decreasing the resistive load will
7
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
Figure 3. Interfacing with Video Output Drivers
CRT Driver V
CC
Reference Voltage
C
L
5.0 V
C11
8.0 V
C12
47
R4
10
10
µF
µF
VR1
50 k
VR2
50 k
VR3
50 k
C7
47
C3
0.1
C10
0.1
C9
0.1
µF
R
G
B
V5
Gnd
V
Video
CC
Contrast Contrast Contrast
V
CC
R Emitter
G Emitter
C1 0.1
C2 0.1
C3 0.1
R5
330
R Input
G Input
B Input
R Input
G Input
RGB Output
R6
330
MC13280AY
MC13281A/B
B Emitter
R Clamp
R7
330
B Input
R1
75
R2
75
R3
75
Video Processor
Clamp
Blank
G Clamp
B Clamp
Fast
Commutate
C4
0.1
C5
0.1
C6
0.1
Contrast
5.0 V
Clamp Blank
Input Input
VR5
50 k
8
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
Figure 4. RGB In/Out Linearity
Figure 5. Contrast Control
4.5
4.0
3.5
4.5
4.0
3.5
3.0
2.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.0
1.5
1.0
0.5
0
0
0.2
0.4
0.6
0.8
0
2.0
4.0
6.0
VIDEO INPUT (Vpp)
CONTRAST CONTROL VOLTAGE (V)
Figure 7. Crosstalk From Green to Red
and Blue Channels
Figure 6. Subcontrast Control
4.5
4.0
0
–10
–20
–30
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–40
–50
–60
Blue Channel
–70
–80
Red Channel
0
2.0
4.0
6.0
1.0
10
100
1000
SUBCONTRAST VOLTAGE (V)
f, FREQUENCY (MHz)
9
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
Figure 8. Rise Time for MC13281B
Figure 9. Fall Time for MC13281B
100 mV/DIV
5.0 ns/DIV
10x PROBE
100 mV/DIV
5.0 ns/DIV
10x PROBE
NOTE: Recommend to use a double sided PCB without any socket for rise/fall time measurements, using an input pulse with
1.5 ns rise/fall time and an active probe with 1.7 pF capacitance loading.
Figure 10. Single Sided PCB Layout
(Component Side) for MC13280AY, MC13281B
Blank
Clamp
R In
R7
R VR1 G VR2 B VR3
R Out
R1
R2
J1
J3
IC1
G In
B In
C6
C1
C7
C2
C8
C3
R6
C13
C5
G Out
B Out
C4
R5
J4
C12
C17
C16
J2
C14
C15
C11
R4
R3
C10
V
Gnd
CC
8.0 V
VR5
Main
Contrast
NOTE: J = Jumper
10
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
OUTLINE DIMENSIONS
P SUFFIX
PLASTIC PACKAGE
CASE 724–03
ISSUE D
–A–
NOTES:
1. CHAMFERED CONTOUR OPTIONAL.
2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
24
1
13
12
–B–
4. CONTROLLING DIMENSION: INCH.
INCHES
MILLIMETERS
L
DIM
A
B
C
D
E
MIN
MAX
1.265
0.270
0.175
0.020
MIN
31.25
6.35
3.69
0.38
MAX
32.13
6.85
4.44
0.51
C
1.230
0.250
0.145
0.015
NOTE 1
–T–
SEATING
PLANE
K
0.050 BSC
1.27 BSC
F
G
J
K
L
M
N
0.040
0.100 BSC
0.007
0.110
0.300 BSC
0.060
1.02
2.54 BSC
0.18
2.80
7.62 BSC
1.52
N
M
E
0.012
0.140
0.30
3.55
G
J 24 PL
0.25 (0.010)
F
M
M
T
B
D 24 PL
0
15
0.040
0
0.51
15
1.01
0.020
M
M
0.25 (0.010)
T A
P SUFFIX
PLASTIC PACKAGE
CASE 738–03
ISSUE E
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
20
1
11
B
10
L
C
INCHES
MILLIMETERS
DIM
A
B
C
D
MIN
MAX
1.070
0.260
0.180
0.022
MIN
25.66
6.10
3.81
0.39
MAX
27.17
6.60
4.57
0.55
1.010
0.240
0.150
0.015
–T–
SEATING
PLANE
K
E
0.050 BSC
1.27 BSC
M
0.050
0.070
1.27
1.77
F
G
J
K
L
N
E
0.100 BSC
2.54 BSC
0.008
0.110
0.015
0.140
0.21
2.80
0.38
3.55
G
F
J 20 PL
0.300 BSC
7.62 BSC
D 20 PL
0.25 (0.010)
M
M
0.25 (0.010)
T
B
M
N
0
15
0
15
0.020
0.040
0.51
1.01
M
M
T
A
11
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
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datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
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