ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
601
WIDE BANDWIDTH
HIGH VOLTAGE AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
MIL-PRF-38534 QUALIFIED
FEATURES:
Ultra Low Quiescent Current - ±15mA for High Voltage
220V Peak to Peak Output Voltage Swing
Slew Rate - 3000V/µS Typical
Gain Bandwidth Product - 200 MHz Typical
Full Power Output Frequency - 1 MHz Typical
Output Current - 100mA Peak
Adjustable VHV Power Supplies Minimizes Power Dissipation
Compact Package Offers Superior Power Dissipation
DESCRIPTION:
The MSK 601(B) is a high voltage wideband amplifier designed to provide very large voltage swings at high slew
rates in wideband systems. The true inverting op-amp topology employed in the MSK 601 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 601
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 601 stable in this range. The MSK 601 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 Very 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
1
COMP
+VCC
GROUND
-VCC
-INPUT
NO CONNECTION
12
11
10
9
8
7
+VHV
+VSC
OUTPUT
CASE/GROUND
-VSC
-VHV
Rev. A 8/00
ABSOLUTE MAXIMUM RATINGS
±VHV
±VIN
±VCC
θJC
Supply Voltage
Input Voltage Range
Supply Voltage (Input Stage)
Thermal Resistance
(Output Devices)
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
±150VDC
±VCC
±18VDC
18°C/W
○
TST
TLD
○
Storage Temperature Range -65°C to +150°C
Lead Temperature Range
300°C
(10 Seconds)
Case Operating Temperature
MSK601
-40°C to +85°C
MSK601B
-55°C to +125°C
Junction Temperature
150°C
○
○
○
TC
○
○
○
○
TJ
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
ELECTRICAL SPECIFICATIONS
Parameter
MSK 601B
Group A
Test Conditions 1
MSK 601
Units
Subgroup
Min.
Typ.
Max.
Min.
Typ.
Max.
VIN=0 @ +VCC
1,2,3
-
1.5
2.0
-
1.8
2.5
mA
VIN=0 @ -VCC
1,2,3
-
15
25
-
20
30
mA
VIN=0 @ +VHV
1,2,3
-
20
30
-
25
35
mA
VIN=0 @ -VHV
1,2,3
-
20
30
-
25
35
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
350
-
100
-
nA
VIN=0
2,3
-
±10
±50
-
±10
-
µV/°C
±VCC
-
±12
±15
±18
±12
±15
±18
V
±VHV
-
±50
±120 ±150 ±50
±120
±150
V
Output Voltage Swing
f=1KHz
4
±110 ±115
-
±110 ±115
-
V
Peak Output Current 2
f=1KHz
-
±200 ±250
-
±200 ±250
-
mA
Full Power Output 2
V0=±100V
-
1
2
-
1
2
-
MHz
Unity Gain Bandwidth 2
V0=±1.0V
-
50
70
-
50
70
-
MHz
Slew Rate
V0=±90V
4
2000
3000
-
1500
3000
-
V/µS
f=1KHz
4
90
95
-
90
95
-
dB
Settling Time to 1% 2
AV=-10V/V
-
-
250
-
-
250
-
nS
Settling Time to 0.1% 2
AV=-10V/V
-
-
1200
-
-
1200
-
nS
STATIC
Quiescent Current
Input Offset Voltage
VIN=0
Input Bias Current
Input Offset Voltage Drift 2
Power Supply Range
DYNAMIC CHARACTERISTICS
Voltage Gain 2
NOTES:
1
2
3
4
5
Unless otherwise specified, ±VCC=±15VDC, ±VHV=±120VDC, CL=8pF (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
TA=TC=+25°C
Subgroup 2,5
TA=TC=+125°C
Subgroup 3,6
TA=TC=-55°C
2
Rev. A 8/00
APPLICATION NOTES
FEED FORWARD TOPOLOGY
INTERNAL COMPENSATION
The MSK 601 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 an amplifier with most of the
benefits of a differential amplifier without the loss in system
bandwidth.
Since the MSK 601 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.
CURRENT LIMIT
Figure 2 is the recommended active short circuit protection
scheme for the MSK 601. The following formula may be used
for setting current limit:
HIGH VOLTAGE SUPPLIES
The positive and negative high voltage supplies on the MSK
601 can be adjusted to reduce power dissipation. The output
of the MSK 601 will typically swing to within 8V of either high
voltage power supply rail. Therefore, if the system in question
only needs the output of the amplifier to swing ±40V peak,
the power supply rails could be set to ±50V. For best performance, the minimum value of ±VHV should be ±50VDC. Unbalanced power supply rails are also allowed as long as one or
the other is not decreased to below 30V or above 150V. The
high voltage and low voltage power supplies should be decoupled
as shown in Figure 1.
Current Limit ≈ 0.6V / Rsc
RBASE must be selected based on the value of ±VHV as follows:
RBASE = ((+VHV - (-VHV)) - 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:
TRANSITION TIMES
T = (RSC) (CSC)
Transition time optimization of the MSK 601 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.
VOLTAGE
GAIN
-RIN
RF
CF
-10V/V
1KΩ
Ω
10KΩ
Ω
0.5-5pF
-20V/V
499Ω
Ω
10KΩ
Ω
N/A
-50V/V
402Ω
Ω
20KΩ
Ω
N/A
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 as
shown in Figure 1.
Table 1
Figure 1
3
Figure 2
Rev. A 8/00
MECHANICAL SPECIFICATIONS
MSK601
NOTE: ESD Triangle indicates Pin 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
Part
Number
Screening Level
MSK601
Industrial
MSK601B
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. A 8/00