ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
611
ULTRA HIGH SLEW RATE
HIGH VOLTAGE AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
MIL-PRF-38534 QUALIFIED
FEATURES:
Low Quiescent Current - ±25mA for High Voltage Stage
110V Peak to Peak Output Voltage Swing
Slew Rate - 6000V/µS Typical @ 100Vpp
Small Signal Rise Time - 6nS Typical
Power Output Frequency - 7 MHz Typical
Output Current - 150mA Peak
Adjustable VHV Power Supply Minimizes Power Dissipation
Compact Package Offers Superior Power Dissipation
DESCRIPTION:
The MSK 611 is a high voltage ultra high slew rate amplifier designed to provide large voltage swings in wideband
systems. The true inverting op-amp topology employed in the MSK 611 provides excellent D.C. specifications such
as input offset voltage and input bias current. These attributes are important in amplifiers that will be used in high
gain configurations since the input error voltages will be multiplied by the system gain. The MSK 611 achieves
impressive slew rate specifications by employing a feed forward A.C. path through the amplifier, however, the device
is internally configured in inverting mode to utilize this benefit. Internal compensation for gains of -5V/V or greater
keeps the MSK 611 stable in this range. The MSK 611 is packaged in a space efficient, hermetically sealed, 12 pin
power dual in line package that has a high thermal conductivity for efficient device cooling.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
Wideband High Voltage Amplifier
High Resolution CRT Monitor
Ultra High Performance Video Processing
CRT Beam Intensity Control
Varactor Tuned VCO Driver
Automatic Test Equipment
1
2
3
4
5
6
COMP
+VCC
GROUND
N/C
-INPUT
N/C
1
12
11
10
9
8
7
+VHV
+VSC
OUTPUT
CASE/GROUND
-VSC
-VCC
Rev. B 8/00
ABSOLUTE MAXIMUM RATINGS
+VHV,+VSC
-VSC
±VIN
±VCC
θJC
Supply Voltage
Supply Voltage
Input Voltage Range
Supply Voltage (Input Stage)
Thermal Resistance
(Output Devices)
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+130VDC
-18VDC
±VCC
±18VDC
30°C/W
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TST
TLD
TC
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Storage Temperature Range -65°C to +150°C
300°C
Lead Temperature Range
(10 Seconds)
Case Operating Temperature
-40°C to +125°C
MSK611
-55°C to +125°C
MSK611B
150°C
Junction Temperature
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TJ
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ELECTRICAL SPECIFICATIONS
Parameter
MSK 611B
Group A
Test Conditions 1
MSK 611
Units
Subgroup
Min.
Typ.
Max.
Min.
Typ.
Max.
@ +VCC
1,2,3
-
1.0
2.0
-
1.0
2.0
mA
@ -VCC
1,2,3
-
30
40
-
30
45
mA
@ +VHV
1,2,3
-
25
40
-
25
45
mA
1,2,3
-
11
15
-
11
20
mA
1
-
±1.0
±5.0
-
±1.0
±10
mV
2,3
-
±2.0
±10.0
-
±2.0
-
mV
1
-
50
250
-
50
500
nA
2,3
-
100
500
-
100
-
nA
VIN=0
2,3
-
±10
±50
-
±10
-
µV/°C
±VCC
-
±12
±15
±18
±12
±15
±18
V
+VHV, +VSC
STATIC
Quiescent Current
VIN=0
7
@ -VSC
Input Offset Voltage
VIN=0
Input Bias Current
Input Offset Voltage Drift 2
-
50
120
130
50
120
130
V
-VSC
-
-18
-15
0
-18
-15
0
V
Output Voltage Swing 6
f=1KHz
4
100
110
-
100
110
-
Vpp
Peak Output Current 2
f=1KHz
4
Power Supply Range 2
DYNAMIC CHARACTERISTICS
Full Power Output Frequency 2
Unity Gain Bandwidth 2
Slew Rate
Voltage Gain 2
V0=100Vpp
V0=1Vpp
±125 ±150
-
mA
-
4
7
-
MHz
-
-
150
-
MHz
6000
-
5500
6000
-
V/µS
4
5
7
-
-
150
V0=100Vpp
4
5500
f=1KHz
-
±125 ±150
4
80
100
-
80
100
-
dB
Settling Time to 1% 2
AV=-10V/V VO=50Vpp
-
-
100
-
-
100
-
nS
Settling Time to 0.1% 2
AV=-10V/V VO=50Vpp
-
-
250
-
-
250
-
nS
NOTES:
1
2
3
4
5
Unless otherwise specified, ±VCC=±15VDC, +VHV=+VSC=+120VDC, -VSC=-15VDC, CL=5pF (probe capacitance) and AV=10V/V.
This parameter is guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ('B' suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroup 1,4
TC=+25°C
Subgroup 2,5
TJ=+125°C
Subgroup 3,6
TA=-55°C
6 The output voltage swing is typically within 8 volts of each VSC supply setting.
7 Includes +VSC quiescent current.
2
Rev. B 8/00
APPLICATION NOTES
FEED FORWARD TOPOLOGY
The MSK 611 employs a circuit topology known as "feed
forward". This inverting configuration allows the user to realize the excellent D.C. input characteristics of a differential amplifier without losing system bandwidth. The incoming signal
is split at the input into its A.C. and D.C. component. The D.C.
component is allowed to run through the differential amplifier
where any common mode noise is rejected. The A.C. component is "fed forward" to the output section through a very high
speed linear amplifier where it is mixed back together with the
D.C. component. The result is a composite amplifier with most
of the benefits of a differential amplifier without the loss in
system bandwidth.
INTERNAL COMPENSATION
Since the MSK 611 is a high voltage amplifier, it is commonly used in circuits employing large gains. Therefore, the
internal compensation was chosen for gains of -5V/V or greater.
In circuits running at gains of less than -5V/V, the user can
further compensate the device by adding compensation networks at the input or feedback node. Pin 1 (comp) should be
bypassed with a 0.1uF ceramic capacitor to +VHV for all applications.
HIGH VOLTAGE SUPPLIES
The positive and negative high voltage supplies on the MSK
611 can be adjusted to reduce power dissipation. The output
of the MSK 611 will typically swing to within 8V of either
output voltage power supply rail. Therefore, if the system in
question only needs the output of the amplifier to swing 0 to
40V peak, the power supply rails could be set to -15V and
+50V safely. For best performance, the minimum value of
+VHV should be +50VDC. The -VSC pin may be directly connected to ground if the output does not need to swing through
zero volts. The high voltage and low voltage power supplies
should be decoupled as shown in Figure 1.
VOLTAGE
GAIN
-RIN
RF
CF
-10V/V
402Ω
Ω
4.02KΩ
Ω
0.25-2pF
-20V/V
301Ω
Ω
6.04KΩ
Ω
N/A
-50V/V
100Ω
Ω
Ω
5KΩ
N/A
Table 1
CURRENT LIMIT
Figure 2 is an active short circuit protection scheme for the
MSK 611. The following formula may be used for setting current limit:
Current Limit ≈ 0.6V / Rsc
RBASE must be selected based on the value of +VHV and -VCC
as follows:
RBASE = ((+VHV - (-VCC)) - 1.2V) / 4mA
This formula guarantees that Q2 and Q4 will always have sufficient base current to be in operation. This circuit can be made
tolerant of high frequency output current spikes with the addition of CSC. The corresponding time constant would be:
T = (RSC) (CSC)
A common value for CSC is approximately 1000pF. If current
limit is unnecessary, short pin 7 to pin 8 and pin 11 to pin 12.
Pin 8 can be tied to ground if swing through zero is not desired.
TRANSITION TIMES
Transition time optimization of the MSK 611 follows the same
basic rules as most any other amplifier. Best transition times
will be realized with minumum load capacitance, minimum external feedback resistance and lowest circuit gain. Transition
times will degrade if the output is driven too close to either
supply rail. Feedback and input resistor values will affect transition time as well. See Figure 1 and Table 1 for recommended
component values.
Figure 2
Figure 1
3
Rev. B 8/00
MECHANICAL SPECIFICATIONS
NOTE: ESD Triangle indicates Pin 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
Part
Number
Screening Level
MSK611
Industrial
MSK611B
Military-Mil-PRF-38534
M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however, and assumes no liability for the use of its products.
4
Rev. B 8/00