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ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP. FEATURES:
VERY WIDE BANDWIDTH HIGH VOLTAGE AMPLIFIER
610
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088 Ultra Low Quiescent Current - 12mA for High Voltage Stage 110V Peak to Peak Output Voltage Swing Slew Rate - 5000V/S Typical @ 100Vpp Gain Bandwidth Product - 550 MHz Typical Full Power Output Frequency - 9 MHz Typical Output Current - 250mA Peak Adjustable VHV Power Supply Minimizes Power Dissipation Compact Package Offers Superior Power Dissipation
MIL-PRF-38534 QUALIFIED
DESCRIPTION:
The MSK 610 is a high voltage very wideband amplifier designed to provide large voltage swings at high slew rates in wideband systems. The true inverting op-amp topology employed in the MSK 610 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 610 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 610 stable in this range. The MSK 610 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
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
1
PIN-OUT INFORMATION
COMP +VCC GROUND N/C -INPUT N/C 12 11 10 9 8 7 +VHV +VSC OUTPUT CASE/GROUND -VSC -VCC
Rev. A 8/00
ABSOLUTE MAXIMUM RATINGS

TC TJ
ELECTRICAL SPECIFICATIONS
Parameter STATIC @ +VCC Quiescent Current VIN=0 @ -VCC @ +VHV @ -VSC Input Offset Voltage VIN=0 1,2,3 1,2,3 1,2,3 1,2,3 1 2,3 1 2,3 VIN=0 VCC Power Supply Range 2 DYNAMIC CHARACTERISTICS Output Voltage Swing 6 Peak Output Current 2 Full Power Output Frequency 2 Unity Gain Bandwidth 2 Slew Rate Voltage Gain 2 Settling Time to 1% 2 Settling Time to 0.1% 2 f=1KHz f=1KHz V0=100Vpp V0=1Vpp V0=100Vpp f=1KHz AV=-10V/V VO=50Vpp AV=-10V/V VO=50Vpp 4 4 4 4 4 4 100 2 80 4000 80 110 9 100 5000 100 200 500 100 1 80 4000 80 110 9 100 5000 100 200 500 Vpp mA MHz MHz V/S dB nS nS +VHV, +VSC -VSC 2,3 12 50 -18 1.0 12 12 12 1.0 2.0 50 100 10 15 120 -15 2.0 30 25 25 5.0 10.0 250 500 50 18 130 0 12 50 -18 1.0 12 12 12 1.0 2.0 50 100 10 15 120 -15 2.0 35 28 28 10 500 18 130 0 mA mA mA mA mV mV nA nA V/C V V V Test Conditions 1 Group A Subgroup Min. MSK 610B Typ. Max. Min. MSK 610 Typ. Max. Units
Input Bias Current Input Offset Voltage Drift 2
200 250
200 250
NOTES:
Unless otherwise specified, VCC=15VDC, +VHV=+VSC=+120VDC, -VSC=-15VDC, 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 TC=+25C Subgroup 2,5 TJ=+125C Subgroup 3,6 TA=-55C 6 The output voltage swing is typically within 8 volts of each VSC supply setting. 1 2 3 4 5
2
Rev. A 8/00

+VHV,+VSC -VSC VIN VCC JC
Supply Voltage Supply Voltage Input Voltage Range Supply Voltage (Input Stage) Thermal Resistance (Output Devices)
+130VDC -18VDC VCC 18VDC 30C/W
TST TLD
Storage Temperature Range -65C to +150C Lead Temperature Range 300C (10 Seconds) Case Operating Temperature MSK610 -40C to +125C MSK610B -55C to +125C Junction Temperature 150C
APPLICATION NOTES FEED FORWARD TOPOLOGY
The MSK 610 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.
VOLTAGE GAIN
-10V/V -20V/V -50V/V
-RIN
604 301 100
RF
6.04K 6.04K 5K
CF
0.5-2pF N/A N/A
Table 1
INTERNAL COMPENSATION
Since the MSK 610 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 an active short circuit protection scheme for the MSK 610. 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.
HIGH VOLTAGE SUPPLIES
The positive and negative high voltage supplies on the MSK 610 can be adjusted to reduce power dissipation. The output of the MSK 610 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.
TRANSITION TIMES
Transition time optimization of the MSK 610 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 1
3
Figure 2
Rev. A 8/00
MECHANICAL SPECIFICATIONS
NOTE: ESD Triangle indicates Pin 1. ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
Part Number MSK610 MSK610B Screening Level Industrial Military-Mil-PRF-38534
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.
M.S. Kennedy Corp.
4
Rev. A 8/00

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