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PDF MAX470 Data sheet ( Hoja de datos )
| Número de pieza | MAX470 | |
| Descripción | Two-Channel / Triple/Quad RGB Video Switches and Buffers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-0219; Rev 2; 6/94
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
Two-Channel, Triple/Quad
RGB Video Switches and Buffers
_______________General Description
The MAX463–MAX470 series of two-channel,
triple/quad buffered video switches and video buffers
combines high-accuracy, unity-gain-stable amplifiers
with high-performance video switches. Fast switching
time and low differential gain and phase error make this
series of switches and buffers ideal for all video appli-
cations. The devices are all specified for ±5V supply
operation with inputs and outputs as high as ±2.5V
when driving 150Ω loads (75Ω back-terminated cable).
Input capacitance is typically only 5pF, and channel-to-
channel crosstalk is better than 60dB, accomplished by
surrounding all inputs with AC ground pins. The on-
board amplifiers feature a 200V/µs slew rate (300V/µs
for AV = 2V/V amplifiers), and a bandwidth of 100MHz
(90MHz for AV = 2V/V buffers). Channel selection is
controlled by a single TTL-compatible input pin or by a
microprocessor interface, and channel switch time is
only 20ns.
For design flexibility, devices are offered with buffer-
amplifier gains of 1V/V or 2V/V for 75Ω back-terminated
applications. Output amplifiers have a guaranteed out-
put swing of ±2V into 75Ω.
Devices offered in this series are as follows:
PART
DESCRIPTION
MAX463
MAX464
MAX465
MAX466
MAX467
MAX468
MAX469
MAX470
Triple RGB Switch & Buffer
Quad RGB Switch & Buffer
Triple RGB Switch & Buffer
Quad RGB Switch & Buffer
Triple Video Buffer
Quad Video Buffer
Triple Video Buffer
Quad Video Buffer
VOLTAGE GAIN
(V/V)
1
1
2
2
1
1
2
2
________________________Applications
Broadcast-Quality Color-Signal Multiplexing
RGB Multiplexing
RGB Color Video Overlay Editors
RGB Color Video Security Systems
RGB Medical Imaging
Coaxial-Cable Line Drivers
____________________________Features
o 100MHz Unity-Gain Bandwidth
o 90MHz Bandwidth with 2V/V Gain
o 0.01%/0.03° Differential Gain/Phase Error
o Drives 50Ω and 75Ω Back-Terminated Cable Directly
o Wide Output Swing:
±2V into 75Ω
±2.5V into 150Ω
o 300V/µs Slew Rate (2V/V gain)
o 20ns Channel Switching Time
o Logic Disable Mode:
High-Z Outputs
Reduced Power Consumption
o Outputs May Be Paralleled for Larger Networks
o 5pF Input Capacitance (channel on or off)
______________Ordering Information
PART
MAX463CNG
MAX463CWG
MAX463C/D
MAX463ENG
MAX463EWG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 Wide SO
Dice*
24 Narrow Plastic DIP
24 Wide SO
Ordering Information continued on last page.
* Dice are specified at TA = +25°C, DC parameters only.
_________________Pin Configurations
TOP VIEW
IN0A 1
GND 2
IN1A 3
GND 4
IN2A 5
V- 6
V- 7
IN0B 8
GND 9
IN1B 10
GND 11
IN2B 12
MAX463
MAX465
24 GND
23 LE
22 EN
21 A0
20 CS
19 V-
18 OUT0
17 V+
16 OUT1
15 GND
14 V+
13 OUT2
Typical Operating Circuit appears at end of data sheet.
DIP/SO
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
1 page  
Two-Channel, Triple/Quad
RGB Video Switches and Buffers
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
VOLTAGE GAIN ACCURACY
vs. TEMPERATURE
0.16
MAX463
DISABLED OUTPUT RESISTANCE
vs. TEMPERATURE
400
MAX465
DISABLED OUTPUT RESISTANCE
vs. TEMPERATURE
1.30
0.14
MAX465
0.12
0.10
0.08
MAX463
350
300
250
1.25
1.20
1.15
0.06
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
200
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
1.10
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
30
25
I+
20
15
I–
10
5
0
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
DISABLED SUPPLY CURRENT
vs. TEMPERATURE
40
35
I+
30
25
20
I–
15
10
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
4
3
2
1
0
–1
–2
–3
–4
10
OUTPUT VOLTAGE SWING
vs. LOAD RESISTANCE
MAX463/4/7/8:VIN = 4V
MAX465/6/9/70:VIN = 2V
100 1000
LOAD RESISTANCE ( Ω )
10000
_______________________________________________________________________________________ 5
5 Page 
Two-Channel, Triple/Quad
RGB Video Switches and Buffers
Table 1a. Amplifier and Channel Selection
with LE = V+
C—S– E—N– A0
FUNCTION
0
0
0
Enables amplifier outputs.
Selects channel A.
0
0
1
Enables amplifier outputs.
Selects channel B.
0 1 X Disables amplifiers. Outputs high-Z.
1
X
X
Latches all input registers.
Changes nothing.
tWrahnesnpaLrEenitsacnodninnedcetpeedndtoengt roofuCn—Sd–,atchteivitE—yN.–
register is
This allows
adLlEol wMtonA,gXrre4og6ua3nr–ddMlaeAnsXds4oc6fo6tnhdneeevcC—itcS–aeilsnl pE—toNu–tbisnetpausteitms. utSoltgiamenptehloyeurcs(olFynignsuehrcuett
5a). For the MAX464 and MAX466, LE must be hard-
wired to either V+ or ground (rather than driving LE with
a gate) to prevent crosstalk from the digital inputs to
IN0A.
Table 1b. Amplifier and Channel Selection
with LE = GND
C—S– E—N– A0
FUNCTION
0
0
0
Enables amplifier outputs.
Selects channel A.
0
0
1
Enables amplifier outputs.
Selects channel B.
0
1
0
Disables amplifiers. Outputs high-Z.
A0 register = channel A
0
1
1
Disables amplifiers. Outputs high-Z.
A0 register = channel B
Enables amplifier outputs, latches A0
1
0
X
register, programs outputs to output A
oC—rS–B's,
according
last edge.
to
the
setting
of
A0
at
1 1 X Disables amplifiers. Outputs high-Z.
Another option for output disable is to connect LE to V+,
pE—aN–ratolleilntdheivioduutaplulytsdoisf asbelveeraalll
MAX463-MAX466s, and
devices but the one in
use
use
(Figure 5b).
When the outputs are disabled, the off isolation from
the analog inputs to the amplifier outputs is typically
70dB at 10MHz, all inputs driven with a 4VP-P sine
wave and a 150Ω load impedance. Figure 6 shows the
test circuits used to measure isolation and crosstalk.
SHUTDOWN
MAX463–
LE MAX466
EN
EN
AO MAX463–
CS MAX466
+5V
LE
MAX463–
LE MAX466
EN
EN
AO MAX463–
CS MAX466
+5V
LE
NOTE: ISOLATION RESISTORS,
IF REQUIRED, NOT SHOWN.
(a)
(b)
Figure 5. (a) Simultaneous Shutdown of all MAX463–MAX466, (b) Enable (E–—N–) Register Latched by C–—S–
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MAX470.PDF ] | |
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