ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
DUAL HIGH VOLTAGE/
HIGH CURRENT
OPERATIONAL AMPLIFIER
182/183/
184/185
(315) 701-6751
FEATURES:
MSK185 Replaces APEX PA26
MSK184 Replaces APEX PA21
Available to DSCC SMD 5962-92152
Space Efficient Dual Amplifiers
High Voltage Operation:
Single Supply: +8V to +60V
Dual Supply: ±4V to±30V
High Output Current: 3 Amp Continuous per amplifier
High Speed: 10V/µS
Low Quiescent Current: 20 mA per amplifier Typ.
Adjustable Current Limits
Thermal Shutdown
Enable/Status Pin For Output Disable Control
MIL-PRF-38534 CERTIFIED
MSK182
MSK183
MSK184
MSK185
(IN DEVELOPMENT)
DESCRIPTION:
The MSK 182, 183, 184 and 185 are dual high power monolithic operational amplifiers ideal for use with a wide
variety of loads. With operation from either single or dual supplies, they offer excellent design flexibility. Power
dissipation is kept to a minimum with a quiescent current rating of only 20mA per amplifier, while 3 Amps of
continuous available output current makes them a very good low cost choice for motor drive circuits and audio
amplification. The design is internally protected against current overloads and overtemperature conditions. On the
MSK 182 and MSK 183, current limit can also be user-selected through the use of a resistor/potentiometer or voltage
out/current out DAC. The MSK 182 is packaged in a hermetically sealed 14 pin power DIP with bolt down tabs for
applications that require heat sinking. The MSK 183 is packaged in a low cost ceramic SIP and the MSK 184 is
packaged in a TO-3. The MSK 185 is packaged in a hermetically sealed 12 pin SIP flatpack with mounting studs.
TYPICAL APPLICATIONS
Servo Driver
Actuator Driver
Audio Amplifier
Power Supplies
Bridge Amps
Stereo Amps
1
Rev. I 3/04
EQUIVALENT SCHEMATIC
MSK182
MSK183
MSK184
MSK185
PIN-OUT INFORMATION
1
2
3
4
5
6
7
OUTPUT 1
+V
CC
1
-V
CC
1
+V
IN
2
-V
IN
2
I
LIM
2
E/S 2
14
13
12
11
10
9
8
E/S 1
I
LIM
1
-V
IN
1
+V
IN
1
-V
CC
2
+V
CC
2
OUTPUT 2
1
2
3
4
5
6
7
+V
IN
1
-V
IN
1
I
LIM
1
E/S 1
OUTPUT 1
+V
CC
1
-V
CC 1/2
13
12
11
10
9
8
E/S 2
I
LIM
2
-V
IN
2
+V
IN
2
+V
CC
2
OUTPUT 2
1
2
3
4
5
6
7
8
OUTPUT(1)
+V
CC
(1/2)
-V
IN
(1)
+V
IN
(1)
+V
IN
(2)
-V
IN
(2)
-V
CC
(1/2)
OUTPUT(2)
1
2
3
4
5
6
+V
IN
1
12 +V
IN
2
-V
IN
1
11 -V
IN
2
NC
10 NC
NC
9 NC
OUTPUT 1
8 OUTPUT 2
-V
CC
1/2
7 +V
CC
1/2
MSK 182 PINOUT
MSK 183 PINOUT
2
MSK 184 PINOUT
MSK 185 PINOUT
Rev. I 3/04
ABSOLUTE MAXIMUM RATINGS
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R
TH
Parameter
STATIC
Supply Voltage Range 3
Quiescent Current (Per Amp)
Quiescent Current (Per Amp) 7
INPUT
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current 3
Input Offset Current 3
Input Impedance
Input Capacitance
Test Conditions
1
2
Group A
Subgroup
MSK182G/E
184G/E/185G/E
Max.
Min.
Typ.
MSK182/MSK183/
MSK184/MSK185
Typ.
Min.
Max.
-
V
IN
=0V
Shutdown Mode V
IN
=0V
1
2,3
-
±4
-
-
-
-
±17
±17
±6
±30
±20
±20
-
±4
-
-
-
-
±17
-
±6
±30
±23
-
-
V
IN
=0V
V
IN
=0V
V
IN
=0V
V
IN
=OV
f=DC
f=DC
1
-
1
1
-
-
1
-
-
-
-
±1
-
-
80
-
±2
±30
±10
-
-
-
-
-
-
-
75
-
±2
±30
±100
±5
10
6
95
90
7
±15
-
±750
±75
-
-
-
-
±100 ±500
±5
10
6
95
90
7
±50
-
-
-
-
Common Mode Rejection Ratio 3 (-V
CC
)-
0.1
≤
V
IN
≤
(+V
CC)
-
3V
Input Voltage Noise Density
OUTPUT
Output Voltage Swing
Output Current
I
OUT
=0.6A
I
OUT
=3.0A
DC=Continuous
V
E/S
High- Output Enabled E/S Open or High
V
E/S
Low- Output Disabled E/S Forced Low
Shutdown Input 3 7
I
E/S
High- Output Enabled E/S Open or High
I
E/S
Low- Output Disabled E/S Forced Low
Output Disable Time 7
Output Enable Time 7
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain 3
Settling Time ±0.1%
3
A
V
=1 V
OUT=
50Vp-p R
L
=8Ω
V
OUT
=±25V R
L
=1KΩ
A
V
=10 50V Step
3
f=1KH
Z
4
4
4
4
4
-
-
-
-
±27
±25.5
±3
-27.5
-
-
-
-
-
±28
±26
-
-
-
-65
-70
1
3
-
-
-
-
-29
-
-
-
-
±27
±25
±3
-27.5
-
-
-
-
-
±28
±26
-
-
-
-65
-70
1
3
-
-
-
-
-29
-
-
-
-
-
4
-
-
90
-
10
98
15
-
-
-
-
88
-
8
98
18
-
-
-
NOTES:
1
2
3
4
5
6
Unless otherwise specified ±V
CC
= ±30VDC and E/S pin is open for MSK 182 and MSK 183.
All electrical specifications apply to each amplifier.
Devices shall be capable of meeting the parameter, but need not to be tested. Typical parameters are for reference only.
Industrial grade and 'E' suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ('G' suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroup 1,4 T
A
=T
C
=+25°C
Subgroup 2 T
A
=T
C
=+125°C
Subgroup 3 T
A
=T
C
=-40°C
7 Does not apply to MSK 184 or MSK185.
8 Refer to SMD 5962-92152 for electrical parameters for devices purchased as such.
9 The operating temperature range is -55°C to +125°C if the device is powered. The minimum cold start temperature is -40°C.
3
Rev. I 3/04
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ELECTRICAL SPECIFICATIONS
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V
CC
±I
OUT
V
IND
V
IN
T
J
Total Supply Voltage
60V
Output Current (within S.O.A.)
5A
Input Voltage (Differential)
±29.5V
Input Voltage (Common Mode)
+27V/-29V
Junction Temperature
Internal Protection
(See Application Note)
T
ST
T
LD
T
C
-65°C to +150°C
Storage Temperature Range
300°C
Lead Temperature Range
(10 seconds)
Case Operating Temperature
(MSK182G/E/184G/E/185G/E) See Note 9 -40°C to +125°C
-25°C to +85°C
(MSK182/183/184/185)
Thermal Resistance (Per Amplifier)
1.8°C/W
MSK182 - Junction to Case @ 125°C
3.0°C/W
MSK183
- Junction to Case @ 125°C
3.5°C/W
MSK184 - Junction to Case @ 125°C
4.0°C/W
MSK185 - Junction to Case @ 125°C
Units
V
mA
mA
mA
mV
µV/°C
n
A
n
A
Ω
pF
dB
nV/
√H
Z
V
V
A
V
V
µA
µA
µS
µS
V/µS
dB
µS
APPLICATION NOTES
POWER SUPPLIES:
For the MSK 182/183/184/185 maximum total supply volt-
age is specified as 60V. However, dual and unbalanced power
supply operation is permissible as long as total supply voltage
does not exceed 60V.
THERMAL PROTECTION:
The amplifiers are equipped with thermal protection circuitry
that protects each amplifier from damage caused by excessive
junction temperature. The output is disabled when the junction
temperature reaches approximately 160°C. After the junction
temperature cools to approximately 140°C, the output is again
enabled. The thermal protection may cycle on and off depend-
ing on the output load and signal conditions; this may have an
undesirable effect on the load.
It should be noted that even though this internal protection
circuitry does protect against overload conditions, it does not
take the place of proper heat sinking. For reliable operation,
junction temperature should be limited to 150°C, maximum.
POWER SUPPLY BYPASSING:
Power supply terminals must be effectively decoupled with a
high and low frequency bypass circuit to avoid power supply
induced oscillation. An effective decoupling scheme consists
of a 0.1µF ceramic capacitor in parallel with a 10µF tantalum
capacitor for each power supply pin to ground. In addition, it is
recommended that a 0.01µF capacitor be placed between ±Vcc
as close to the amplifiers as possible.
ENABLE/STATUS PIN:
For the MSK 182 and MSK 183 this pin actually has a dual
function. First, when the pin is forced low, the output stage is
disabled. Second, it can be monitored to determine if the device
is in thermal shutdown. These functions can be used on the
same device with either single or dual supplies. For normal
operation, the E/S pin must be left open or pulled at least 2.4
volts above the negative rail. In noisy applications, a small value
capacitor between the E/S pin and -Vcc may be required.
To disable the output, the user must pull the E/S pin low, no
greater than 0.8V above -Vcc. To once again enable the device,
the E/S pin must be brought at least 2.4 volts above -Vcc or be
disconnected. It should be noted that when the E/S pin is high,
the internal thermal shutdown is still active.
If the E/S pin is used to monitor thermal shutdown, during
normal operation the voltage on the E/S pin is typically 3.5V
above -Vcc. Once shutdown has occurred this voltage will drop
to approximately 350mV above -Vcc. This function is not avail-
able on the MSK 184 or the MSK 185.
CURRENT LIMIT:
The MSK 182 and MSK 183 offer accurate, user-selectable
current limit. Unlike typical designs that use a power resistor in
series with the output to sense load, the MSK 182 and MSK
183 sense the load indirectly and therefore do not require a
resistor to handle the full output current. Current limit is se-
lected by controlling the input to the I
LIM
pin.
The easiest method is to use a resistor or potentiometer
connected between -Vcc and the I
LIM
pin. Use the following
equation to select proper resistor value:
Rcc= 71,250 -13.75KΩ
I
LIM
A low level control signal (0-330µA) can also be used to con-
trol the current level digitally. If the pin is left open, the current
is programmed to OA, while connecting I
LIM
directly to -Vcc
sets the output current to it's maximum, typically 5A. Such is
the case with the MSK 184 or the MSK 185.
SAFE OPERATING AREA:
The safe operating area curve is a graphical representation of
the power handling capability of the amplifier under various
conditions. Power dissipation of the device is equal to the prod-
uct of the voltage across the output transistor times the output
current. As can be seen in the curve on page 6, safe operating
current decreases with an increase in temperature as well as an
increase in the voltage across the output transistor. Therefore,
for maximum amplifier performance it is important to keep case
temperature as low as possible and to keep ±Vcc as close to
the output rail as achievable.
COMPENSATION:
For normal operation output compensation is not typically
required. However, if the MSK 182 or MSK 183 is intended to
be driven into current limit the user may find that an R/C net-
work is required. A snubber network from the output to ground
for each amplifier will provide stability. If driving large capaci-
tive or inductive loads, a snubber network will also enhance
stability. Typically 3Ω to 10Ω in series with 0.01µF is accept-
able.
APEX PA26 REPLACEMENT:
The MSK 185 is a hermetically sealed, hi-reliability, pin simi-
lar replacement for the APEX PA26. The supply voltage input
and output pin configurations are identical. However, the V
BOOST
and I
SENSE
functions are not available with the MSK 185. The
V
BOOST
and I
SENSE
pins of the PA26 have no internal connec-
tion on the MSK 185. Therefore, any external circuitry con-
nected to pins 3,4,9 & 10 will not degrade the performance of
the MSK 185.
The MSK 185 also provides 4-40 isolated mounting studs in
place of the mounting holes of the PA26. These mounting
studs, which are brazed to the package bottom, offer excellent
heat sink mounting performance while decreasing the potential
amplifier/package damage sometimes experienced with mount-
ing holes.
TYPICAL CONNECTION DIAGRAM
4
Rev. I 3/04
APPLICATION NOTES cont.
Figure 2
Output Disable with a Single Supply
Figure 1
Adjustable Current Limit
Figure 4
Motor Drive Circuit
Figure 3
Thermal Shutdown Status With a Single Supply
Figure 6
Parallel Output For Increased Output Current
Figure 5
Voltage Source
5
Rev. I 3/04
