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參數(shù)資料
| 型號(hào)： | MSK690 |
| 廠(chǎng)商： | MS KENNEDY CORP |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | High Voltage Amplifier(用于CRT顯示的高電壓差分放大器) |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, MBCY8 |
| 封裝： | HERMETIC SEALED, TO-3, 8 PIN |
| 文件頁(yè)數(shù)： | 3/4頁(yè) |
| 文件大小： | 158K |
| 代理商： | MSK690 |
APPLICATION NOTES
ADJUSTABLE HIGH VOLTAGE POWER SUPPLY
The high voltage power supply of the MSK 690 can be ad-
justed from +40 volts to +75 volts. To minimize device power
dissipation, the +V
HV
power supply should be decreased as
much as possible without causing output signal clipping. The
following formula can be used to select a value for +V
HV
:
+V
HV
= V
OUTMAX
+ 5.0V
This will ensure that the transistion times are not degraded due
to the output transistor temporarily going into saturation.
FEEDBACK CAPACITANCE
The gain range of the MSK 690 is ±5V/V to ±100V/V. When
configured for low closed loop gains in the range of ±5V/V to
±25V/V, a small 0.5pF to 2.0pF adjustable capacitor should
be placed in parallel with the feedback resistor. This capacitor
can be adjusted to tailor overshoot and minimize ringing de-
pending on the load. For closed loop gains greater than ±25V/
V the user may omit this capacitor without any loss in circuit
stability. See the table below labeled "recommended compo-
nent values" and the typical connection diagram for compo-
nent selection vs. closed loop gain.
CASE CONNECTION
The case of the MSK 690 is internally connected to pin five
of the package. This pin can be left as a no connect but it is
recommended that the user connect this pin to ground to re-
duce noise and improve overall circuit stability.
DECOUPLING AND LAYOUT
Since the MSK 690 is a high voltage amplifier, it is com-
monly used in high gain configurations. Consequently, any
noise introduced into the system through the power supplies
will be amplified by the system gain. It is therefore imperative
that proper power supply decoupling and printed circuit card
layout guidelines are adhered to. Each power supply should be
effectively decoupled with a parallel combination of capacitors
as shown in the Typical Inverting Connection Diagram. These
capacitors should be connected as close as possible to the pack-
age pins and lead lengths must be kept to a minimum. On the
printed circuit card, the input and output traces should be kept
apart whenever possible to avoid localized feedback. The power
supply lines should be kept as wide as possible to keep their
effective impedance down thereby minimizing pickup.
SOURCE RESISTOR SELECTION
When driving reactive loads, such as the effective capaci-
tance of a cathode ray tube, local oscillations may often occur
in the output transistors of the op-amp. To minimize these
oscillations, an output source resistor may be added in series
with the amplifier output and the capacitive load as seen in the
figure below. This R-C combination acts as a snubber network
that lowers the high frequency bandwidth. The source resistor
is typically in the 10 ohm to 100 ohm range. In exchange for
increased overall circuit stability, a minor reduction in amplifier
bandwidth may occur. The following formula may be used to
approximate the frequency at which the zero will occur on the
open loop plot due to the addition of the isolation resistor.
f
ZERO
= 1/(2
π
(R
ISO
+ R
O
) C
LOAD)
TYPICAL INVERTING CONNECTION DIAGRAM
A
V
-5V/V
-10V/V
-50V/V
-100V/V
R
f
2.7K
2.7K
25K
50K
Cf
0.5-2.0pF
0.5-2.0pF
N/A
N/A
-R
IN
510
270
500
500
RECOMMENDED COMPONENT VALUES
+R
IN
499
249
495
499
SOURCE RESISTOR CONNECTION
Rev. A 8/00
3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSK690B | 制造商:MSK 制造商全稱(chēng):M.S. Kennedy Corporation 功能描述:HIGH VOLTAGE AMPLIFIER |
| MSK707 | 制造商:MSK 制造商全稱(chēng):M.S. Kennedy Corporation 功能描述:ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER |
| MSK707E | 制造商:MSK 制造商全稱(chēng):M.S. Kennedy Corporation 功能描述:ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER |
| MSK707H | 制造商:MSK 制造商全稱(chēng):M.S. Kennedy Corporation 功能描述:ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER |
| MSK738 | 制造商:MSK 制造商全稱(chēng):M.S. Kennedy Corporation 功能描述:INVERTING OPERATIONAL AMPLIFIER |
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