Datasheet MSK181HZ, MSK181EZ, MSK181, MSK181Z, MSK181H Datasheet (MSK)

ISO-9001 CERTIFIED BY DSCC

HIGH VOLTAGE/HIGH CURRENT

OPERATIONAL AMPLIFIER

181

M.S.KENNEDY CORP.

4707 Dey Road Liverpool, N.Y. 13088 [phone]

FEATURES:

Low Cost

High Voltage Operation:

Single Supply: +8V to +60V

Dual Supply: ±4V to±30V

High Output Current: 3 Amp Continuous

High Speed: 10V/µS

Low Quiescent Current: 20 mA Typ.

Adjustable Current Limits

Thermal Shutdown

Monolithic Technology

Enable/Status Pin For Output Disable Control

MSK181

MIL-PRF-38534 CERTIFIED

MSK181Z

DESCRIPTION:

The MSK 181 is a high power monolithic operational amplifier ideal for use with a wide variety of loads. With operation from

either single or dual supplies, the MSK 181 offers excellent design flexibility. Power dissipation is kept to a minimum with a

quiescent current rating of only 20mA, while 3 Amps of continuous available output current makes the MSK 181 a very good low

cost choice for motor drive circuits and audio amplification. The MSK 181 is internally protected against current overloads and

overtemperature conditions. Current limit can also be user-selected through the use of a resistor/potentiometer or voltage out/

current out DAC. The MSK 181 is packaged in a hermetically sealed 8 pin power dip and the MSK 181Z is offered with bolt down

tabs for applications that require heat sinking.

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

Servo Driver

Actuator Driver

Audio Amplifier

Power Supplies

PIN-OUT INFORMATION

+VIN

1

-VIN

2

ILIM

3

E/S

4

1

8

7

6

5

-Vcc

+Vcc

Output

N/C

PRELIMINARY Rev. C 8/01

ABSOLUTE MAXIMUM RATINGS

VCC

±IOUT

VIND

VIN

TJ

Total Supply Voltage

Output Current (within S.O.A.)

Input Voltage (Differential)

Input Voltage (Common Mode)

Junction Temperature

ELECTRICAL SPECIFICATIONS

Parameter

STATIC

Supply Voltage Range

Quiescent Current

Quiescent Current

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 Voltage Swing

Output Current

Shutdown Input Mode

Output Disable Time

Output Enable Time

TRANSFER CHARACTERISTICS

Slew Rate

Open Loop Voltage Gain

Settling Time ±0.1%

2

2

2

2

(-VCC)-0.1≤ VIN ≤ (+VCC)-3V

VES High- Output Enabled E/S Open or High

VES Low- Output Disabled E/S Forced Low

AV=1 VOUT= 50Vp-p RL=8Ω

2

2

○○○○○○○○○○○

○○○○○○

○○○○○○

60V

5A

±29.5V

+27V/-29V

○○

Internal Protection

(See Application Note)

Test Conditions

VIN=0V

Shutdown Mode VIN=0V

VIN=0V

VIN=0V

VIN=0V

VIN=OV

f=DC

f=DC

f=1KHZ

IOUT=0.6A

IOUT=3.0A

DC=Continuous

VOUT=±25V RL=1KΩ

AV=10 50V Step

1

2

TST

Storage Temperature Range

TLD

Lead Temperature Range

(10 seconds)

TC

Case Operating Temperature

(MSK181H/E)

(MSK181)

RTH

Thermal Resistance

○○○○○○○○○○

○○○○○○○○○○○○○

Junction to Case

Min.

±4

-

-

-

-

-

-

±1

-

-

80

-

±27

±25.5

±3

-27.5

-

-

-

-

90

-

MSK181H/E

Typ.

-

±17

±17

±6

±2

±30

±100

±5

7

10

6

95

90

±28

±26

-

-

-

1

3

10

98

15

Group A

Subgroup

-

1

2,3

-

1

-

1

1

-

-

1

-

4

4

4

4

4

-

-

-

4

-

-65°C to +150°C

○○

○○○○○○○○○○

-55°C to +125°C

-40°C to +85°C

○○○○○○○○○○○○○

MSK181

Typ.

Max.

±30

±20

±20

-

±10

-

±500

±50

-

-

-

-

-

-

-

-

-29

-

-

-

-

-

Min.

±4

-

-

-

-

-

-

-

-

-

75

-

±26

±24

±3

-27.5

-

-

-

-

88

-

±17

±6

±2

±30

±100

±5

±28

±26

10

95

90

98

18

Max.

-

±30

±23

-

±15

±750

±75

7

6

-

-

-

-29

1

3

8

300°C

1.8°C/W

Units

mA

mA

-

mA

-

mV

µV/°C

-

-

-

-

nV/√HZ

-

-

-

-

-

-

-

V/µS

-

-

-

V

nA

nA

Ω

pF

dB

V

V

A

V

V

µS

µS

dB

µS

NOTES:

Unless otherwise specified ±VCC= ±30VDC and E/S pin is open.

1

Devices shall be capable of meeting the parameter, but need not to be tested. Typical parameters are for reference only.

2

Industrial grade and 'E' suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.

3

Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3 and 4.

4

Subgroup 1,4 TA=TC=+25°C

5

Subgroup 2 TA=TC=+125°C

Subgroup 3 TA=TC=-55°C

2

PRELIMINARY Rev. C 8/01

APPLICATION NOTES

POWER SUPPLIES:

The MSK 181 maximum total supply voltage 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 0.1µF 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 MSK 181 as possible.

CURRENT LIMIT:

The MSK 181 offers accurate, user-selectable current limit.

Unlike typical designs that use a power resistor in series with

the output to sense load, the MSK 181 senses the load indi-

rectly and therefore does not require a resistor to handle the full

output current. Current limit is selected by controlling the input

to the ILIM pin.

The easiest method is to use a resistor or potentiometer con-

nected between-Vcc and the ILIM pin. Use the following equa-

tion to select proper resistor value:

71,250

ILIM

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 ILIM directly to -Vcc

sets the output current to it's maximum, typically 5A.

Rcc=

-13.75KΩ

THERMAL PROTECTION:

The MSK 181 is equipped with thermal protection circuitry

that protects the 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.

ENABLE/STATUS PIN:

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 de-

vice, the E/S pin must be brought at least 2.4 volts above -Vcc

or 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.

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, safe operating current

decreases with an increase in temperature as well as an in-

crease 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 181 is intended to be driven into

current limit the user may find that an R/C network is required.

A snubber network from the output to ground will provide sta-

bility. If driving large capacitive or inductive loads, a snubber

network will also enhance stability. Typically 3Ω to 10Ω in se-

ries with 0.01µF is acceptable.

TYPICAL CONNECTION DIAGRAM

PRELIMINARY Rev. C 8/013

APPLICATION NOTES cont.

Figure 2

Output Disable with a Single Supply

Adjustable Current Limit

Figure 1

Figure 3

Thermal Shutdown Status With a Single Supply

Figure 4

Motor Drive Circuit

Figure 5

Voltage Source

Figure 6

Parallel Output For Increased Output Current

4

PRELIMINARY Rev. C 8/01

TYPICAL PERFORMANCE CURVES

5 PRELIMINARY Rev. C 8/01

MECHANICAL SPECIFICATIONS

MSK181

MSK181Z

ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD TRIANGLE INDICATES PIN 1.

ORDERING INFORMATION

MSK181

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.

H

Z

PACKAGE STYLE

BLANK= NO TAB; Z= Z TAB

SCREENING

BLANK = INDUSTRIAL; E = EXTENDED RELIABILITY

H = MIL-PRF-38534

GENERAL PART NUMBER

M.S. Kennedy Corp.

4707 Dey Road, Liverpool, New York 13088

Phone [phone]

FAX [phone]

www.mskennedy.com

6

PRELIMINARY Rev. C 8/01