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參數(shù)資料
| 型號： | GB4600-CDA |
| 英文描述： | Analog Buffer/Voltage Follower |
| 中文描述： | 模擬緩沖器/電壓跟隨 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 224K |
| 代理商： | GB4600-CDA |
3
7 GB4600
8 2 5
75
3 1
RS
VIDEO INPUT
0.1
5
10 K
-5V
+5V
0.1
CHIP ENABLE
-5V
R
L
10 K
Min.
Max.
0.1
-5V
1
+5V
0.1
4
VIDEO OUT
(75 )
0.1
I
-SET
8
CL
CCLC110
The circuit shown above uses the GB4600 as an input
buffer driving several GX4201 video crosspoint ICs.
The GB4600 is capable of driving loads up to 100 pF to
a -3 dB bandwidth of 80 MHz. For lighter loads, the
bandwidth is extended to over 100 MHz.
Capacitor C
L
is used to shape the response in conjunction
with the 27
W
series resistor from pin 4. The value shown
will give a -1 dB response at 100 MHz with a total load
capacitance (fixed plus actual) of 47 pF.
In order to disable the GB4600, pin 1 is driven from the
TALLY outputs of the GX4201s. When all crosspoints are
OFF, the voltage on pin 1 will be 0 volts, disabling the
GB4600. Whenever any crosspoint is selected, the
voltage on pin 1 rises to +5 volts and turns on the buffer.
This configuration minimizes the current drain when a
group of crosspoints are turned off.
For other applications, the ENABLE input on the GB4600
may be controlled by any TTL or 5 volt CMOS device.
A unique feature of the GB4600 is that its current drain
can be reduced by adjusting the value of the resistor on
the
I
-SET input, pin 5.
If R-SET is made zero ohms (a direct connection to -V
EE
)
then the supply current drops 50% from 36 mA to 18 mA.
A reduced current will reduce the bandwidth as shown
in Figure 3. For values of R
S
= 27
W
and C
L
= 47 pF, the
-1 dB bandwidth shrinks from 100 MHz at maximum
current to 80 MHz at minimum current.
As with any high frequency circuit, careful board layout
with ample ground plane is critical.
All resistors are in ohms, all capacitors in microfarads unless otherwise stated
All resistors are in ohms, all capacitors in microfarads unless otherwise stated
TEST CIRCUIT
*
The current will be maximum if the pin 5 is left open circuit. Any value of resistance from pin 5 to -V
EE
will reduce the current. The minimum current
(50% of max.) will occur when R-SET
= 0
W
.
TYPICAL APPLICATION CIRCUIT
7 GB4600
8 2 5
75
3 1
27
VIDEO INPUT
GX4201
0.1
GX4201
GX4201
VIDEO OUT
VIDEO OUT
VIDEO OUT
TALLY OUT
TALLY OUT
TALLY OUT
10K
-5V
-5V
+5V
0.1
CL
*
R-SET
13421 - 5
相關PDF資料 |
PDF描述 |
|---|---|
| GB4600-CKA | Analog Buffer/Voltage Follower |
| GB570 | GB570 - DynamEQ? II WDRC IC |
| GC570 | GC570 - DynamEQ? II WDRC IC |
| GBA-1 | Fuse |
| GBA-10 | Fuse |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| GB4600-CKA | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Monolithic Unity Gain Video Buffer |
| GB-473 | 制造商:LUCKY-LIGHT 制造商全稱:LUCKY-LIGHT 功能描述:Cylindrical Type Inverted Cone LED Lamps (4.7mm) |
| GB-473HR3C | 制造商:LUCKY-LIGHT 制造商全稱:LUCKY-LIGHT 功能描述:Cylindrical Type Inverted Cone LED Lamps (4.7mm) |
| GB-473HR3T | 制造商:LUCKY-LIGHT 制造商全稱:LUCKY-LIGHT 功能描述:Cylindrical Type Inverted Cone LED Lamps (4.7mm) |
| GB-473UIC | 制造商:LUCKY-LIGHT 制造商全稱:LUCKY-LIGHT 功能描述:Cylindrical Type Inverted Cone LED Lamps (4.7mm) |
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