4707 Dey Road Liverpool, N.Y. 13088
(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 to30V
High Output Current: 3 Amp Continuous per amplifier
High Speed: 10V/S
Low Quiescent Current: 20 mA per amplifier Typ.
Adjustable Current Limits
Thermal Shutdown
Enable/Status Pin For Output Disable Control
MIL-PRF-38534 CERTIFIED
182/183/
184/185
ISO-9001 CERTIFIED BY DSCC
Servo Driver
Actuator Driver
Audio Amplifier
Power Supplies
Bridge Amps
Stereo Amps
M.S.KENNEDY CORP.
MSK182
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
Rev. I 3/04
1
MSK183
DUAL HIGH VOLTAGE/
HIGH CURRENT
OPERATIONAL AMPLIFIER
MSK184
MSK185
(IN DEVELOPMENT)
STATIC
Supply Voltage Range
INPUT
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Impedance
Input Capacitance
Common Mode Rejection Ratio
Input Voltage Noise Density
OUTPUT
Output Current
Output Disable Time
Output Enable Time
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain
Settling Time 0.1%
Max.
30
20
20
-
10
-
500
50
-
-
-
-
-
-
-
-
-29
-
-
-
-
-
-
-
60V
5A
29.5V
+27V/-29V
Internal Protection
(See Application Note)
Total Supply Voltage
Output Current (within S.O.A.)
Input Voltage (Differential)
Input Voltage (Common Mode)
Junction Temperature
-65C to +150C
300C
-40C to +125C
-25C to +85C
1.8C/W
3.0C/W
3.5C/W
4.0C/W
1
2
3
4
5
6
7
8
9
ABSOLUTE MAXIMUM RATINGS
T
ST
T
LD
T
C
R
TH
V
CC
I
OUT
V
IND
V
IN
T
J
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
=+25C
Subgroup 2
T
A
=T
C
=+125C
Subgroup 3
T
A
=T
C
=-40C
Does not apply to MSK 184 or MSK185.
Refer to SMD 5962-92152 for electrical parameters for devices purchased as such.
The operating temperature range is -55C to +125C if the device is powered. The minimum cold start temperature is -40C.
V
IN
=0V
V
IN
=0V
V
IN
=0V
V
IN
=OV
f=DC
f=DC
(-V
CC
)-
0.1
V
IN
(+V
CC)
-
3V
f=1KH
Z
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
I
E/S
High- Output Enabled E/S Open or High
I
E/S
Low- Output Disabled E/S Forced Low
A
V
=1 V
OUT=
50Vp-p R
L
=8
V
OUT
=25V R
L
=1K
A
V
=10 50V Step
Group A
Subgroup
-
1
2,3
-
1
-
1
1
-
-
1
-
4
4
4
4
4
-
-
-
-
-
4
-
Typ.
-
17
17
6
2
30
100
5
10
6
95
90
28
26
-
-
-
-65
-70
1
3
10
98
15
Min.
4
-
-
-
-
-
-
1
-
-
80
-
27
25.5
3
-27.5
-
-
-
-
-
-
90
-
Min.
4
-
-
-
-
-
-
-
-
-
75
-
27
25
3
-27.5
-
-
-
-
-
-
88
-
Max.
30
23
-
-
15
-
750
75
-
-
-
-
-
-
-
-
-29
-
-
-
-
-
-
-
Typ.
-
17
-
6
2
30
100
5
10
6
95
90
28
26
-
-
-
-65
-70
1
3
8
98
18
Units
V
mA
mA
mA
mV
V/C
n
A
n
A
pF
dB
nV/
H
Z
V
V
A
V
V
A
A
S
S
V/S
dB
S
MSK182G/E
184G/E/185G/E
MSK182/MSK183/
MSK184/MSK185
Parameter
Test Conditions
ELECTRICAL SPECIFICATIONS
1
NOTES:
Quiescent Current (Per Amp)
3
Quiescent Current (Per Amp)
V
IN
=0V
Shutdown Mode V
IN
=0V
7
7
Shutdown Input
Output Voltage Swing
3
3
3
3
3
2
3
3
Rev. I 3/04
3
7
7
7
7
Storage Temperature Range
Lead Temperature Range
(10 seconds)
Case Operating Temperature
(MSK182G/E/184G/E/185G/E) See Note 9
(MSK182/183/184/185)
Thermal Resistance (Per Amplifier)
MSK182 - Junction to Case @ 125C
MSK183 - Junction to Case @ 125C
MSK184 - Junction to Case @ 125C
MSK185 - Junction to Case @ 125C
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.
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 0.1F ceramic capacitor in parallel with a 10F tantalum
capacitor for each power supply pin to ground. In addition, it is
recommended that a 0.01F capacitor be placed between Vcc
as close to the amplifiers as possible.
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 3
to 10
in series with 0.01F is accept-
able.
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:
71,250
I
LIM
A low level control signal (0-330A) 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.
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 160C. After the junction
temperature cools to approximately 140C, 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 150C, maximum.
TYPICAL CONNECTION DIAGRAM
Rev. I 3/04
4
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.
THERMAL PROTECTION:
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.
ENABLE/STATUS PIN:
-13.75K
Rcc=
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.
APEX PA26 REPLACEMENT:
PDF 
ZIP
