MSK739E [MSK]

ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER; ULTRA -准确/高压摆率反相运算放大器


型号：	MSK739E
厂家：	M.S. KENNEDY CORPORATION
描述：	ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER ULTRA -准确/高压摆率反相运算放大器运算放大器放大器电路高压
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ISO-9001 CERTIFIED BY DSCC

^{ULTRA-ACCURATE/HIGH SLEW RATE}739

Very Fast Setting Time - 10nS to 0.1% Typical

Very Fast Slew Rate - 5500 V/µS Typical

Unity Gain Bandwidth - 220 MHz Typical

Low Noise - 0.15uVrms Typical (f=0.1Hz to 10Hz)

Very Accurate (Low Offset) ±75µV Max.

Pin Compatable with AD9610

INVERTING

OPERATIONAL AMPLIFIER

M.S.KENNEDY CORP.

4707 Dey Road Liverpool, N.Y. 13088

(315) 701-6751

FEATURES:

MIL-PRF-38534 QUALIFIED

DESCRIPTION:

The MSK 739 is an inverting composite operational amplifier that combines extremely high bandwidth and slew rate with

excellent D.C. accuracy to produce an amplifier perfectly suited for high performance data aquisition and conversion as well

as high speed commmunication and line drive. The performance of the MSK 739 is guaranteed over the full military tem-

perature range and for more cost sensitive applications is available in an industrial version. The standard package style is a

space efficient 12 pin TO-8. However, alternate package styles are available upon request.

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

PIN-OUT INFORMATION

7 Ground

8 NC

9 Negative Power Supply

10 Negative Short Circuit

11 Output

High Performance Data Aquisition

Coaxial Line Driver

Data Conversion Circuits

High Speed Communications

Ultra High Resolution Video Amplifier

Positive Power Supply

Case Ground

Internal Feedback

Inverting Input

Non-Inverting Input

12 Positive Short Circuit

Rev. A 4/02

ABSOLUTE MAXIMUM RATINGS

Storage Temperature Range

Lead Temperature Range

(10 Seconds Soldering)

Power Dissipation

Junction Temperature

Case Operating Temperature Range

-65°C to +150°C

300°C

Supply Voltage

TST

TLD

±VCC

IOUT

VIN

+18V

±200mA

±12V

Peak Output Current

Differential Input Voltage

Thermal Resistance

Junction to Case

See Curve

150°C

RTH

46°C/W

Output Devices Only

(MSK739B/E)

(MSK739)

-55°C to+125°C

-25°C to +85°C

ELECTRICAL SPECIFICATIONS

±Vcc=±15V Unless Otherwise Specified

Group A

MSK 739B/E

MSK 739

Test Conditions

Parameter

Subgroup

Typ.

Min.

Max.

Min.

Typ.

Max.

Units

STATIC

Supply Voltage Range

Quiescent Current

±15

±37

±18

±37

±39

±12

±18

±12

±15

±35

±36

Vin=0V

Av=-1V/V

±40

2,3

Thermal Resistance

Output Devices Junction to Case

°C/W

INPUT

Input Offset Voltage

Vin=0V Av=-100V/V

Vin=0V

±50

±100

±75

µV

µV/°C

±25

±0.5

±10

±15

Input Offset Voltage Drift

2,3

±0.75

±2.0

±1.5

Input Bias Current

Vcm=0V

±20

±60

±40

Either Input

Vcm=0V

2,3

±80

Input Offset Current

2,3

Input Impedance

F=DC Differential

∆Vcc=±5V

F= 0.1Hz To 10Hz

F=1KHz

MΩ

Power Supply Rejection Ratio

µV/V

µVp-p

nV√Hz

pA√Hz

Input Noise Voltage

0.2

0.15

3.8

0.6

Input Noise Voltage Density

Input Noise Current Density

F=1KHz

0.7

OUTPUT

Output Voltage Swing

Output Current

RL=100Ω Av=-3V/V F≤10MHz

TJ<150°C

±12.5

±120

±10

±100

±10 ±12.5

±100 ±120

Settling Time

0.1% 10V step RL=1KΩ

RL=100Ω Vo=±10V

RL=100Ω

Full Power Bandwidth

MHz

Bandwidth (Small Signal)

190

165

175

220

TRANSFER CHARACTERISTICS

Slew Rate

VOUT=±10V RL=1KΩ Av= -1.5V/V

RL=1KΩ F=1KHz VOUT=±10V

4000

100

3500

4000

105

5500

110

V/µS

Open Loop Voltage Gain

NOTES:

AV= -1, measured in false summing junction circuit.

2 Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.

Industrial grade and "E" suffix 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.

Subgroups 5 and 6 testing available upon request.

T^A=TC=+25°C

T^A=TC=+125°C

TA=TC=-55°C

Subgroup 1,4

Subgroup 2

Subgroup 3

Measurement taken 0.5 seconds after application of power using automatic test equipment.

Rev. A 4/02

APPLICATION NOTES

HEAT SINKING

The value of the short circuit current limit resistors (±RSC) can

be calculated as follows.

To determine if a heat sink is necessary for your application and

if so, what type, refer to the thermal model and governing equation

below.

+RSC=VCC-0.7/+ISC

-RSC=VCC+0.7/-ISC

Thermal Model:

Short circuit current limit should be set at least 2X above the

highest normal operating output current to keep the value of RSC low

enough to ensure that the voltage dropped accross the short circuit

current limit resistor doesn't adversely affect normal operation.

INTERNAL FEEDBACK RESISTOR

The MSK 739 is equipped with an internal 1.5KΩ feedback resis-

tor. Bandwidth and slew rate can be optimized by connecting the

MSK 739 as shown in Figure 2. Placing the feedback resistor inside

the hybrid reduces printed circuit board trace length and its'

asscociated capacitance which acts as a capacitive load to the op-

amp output. Reducing the capacitive load allows the output to slew

faster and greater bandwidths will be realized. Refer to Table 1 for

recommended RIN values for various gains.

Governing Equation:

TJ=PD x (RθJC + RθCS + RθJC) + TA

Where

TJ=Junction Temperature

PD=Total Power Dissipation

RθJC=Junction to Case Thermal Resistance

R^θCS=Case to Heat Sink Thermal Resistance

RθSA=Heat Sink to Ambient Thermal Resistance

TC=Case Temperature

TA=Ambient Temperature

TS=Sink Temperature

Example:

This example demonstrates a worst case analysis for the op-amp

output stage. This occurs when the output voltage is 1/2 the power

supply voltage. Under this condition, maximum power transfer oc-

curs and the output is under maximum stress.

RIN

VALUE

APPROXIMATE

DESIRED GAIN

Conditions:

1.5KΩ

750Ω

150Ω

-1

-2

-10

VCC=±16VDC

VO=±8Vp Sine Wave, Freq.=1KHz

RL=100Ω

TABLE 1

Whenever the internal resistor is not being used it is good practice

to short pin 4 and 5 to avoid inadvertently picking up spurious sig-

nals.

For a worst case analysis we will treat the +8Vp sine wave

as an 8VDC output voltage.

Recommended External Component Selection

Guide Using External Rf

TABLE 2

1.) Find Driver Power Dissapation

PD=(VCC-VO) (VO/RL)

=(16V-8V) (8V/100Ω)

=0.64W

APPROXIMATE

DESIRED GAIN

2.) For conservative design, set TJ=+125°C

3.) For this example, worst case TA=+90°C

4.) RθJC=45°C/W from MSK 739B Data Sheet

5.) RθCS=0.15°C/W for most thermal greases

6.) Rearrange governing equation to solve for RθSA

RI(+)

RI(-)

Rf(Ext)

-1

-2

-5

249Ω

160Ω

169Ω

499Ω

249Ω

200Ω

499Ω

1KΩ

-8

-10

100Ω

90.9Ω

100Ω

124Ω

100Ω

1KΩ

2KΩ

RθSA=((TJ-TA)/PD) - (RθJC) - (RθCS)

=((125°C -90°C)/0.64W) - 45°C/W - 0.15°C/W

=54.7 - 46.15

-20

=9.5°C/W

OUTPUT SHORT CIRCUIT PROTECTION

The output section of the MSK 739 can be protected from direct

shorts to ground by placing current limit resistors between pins 1

and 12 and pins 9 and 10 as shown in Figure 1.

The positive input resistor is selected to minimize any bias current induced offset

voltage.

The feedback capacitor will help compensate for stray input capacitance. The value of

this capacitor can be dependent on individual applications. A 0.5 to 5pF capacitor is

usually optimum for most applications.

Effective load is RL in parallel with Rf.

Rev. A 4/02

APPLICATION NOTES CON'T

STABILITY AND LAYOUT CONSIDERATIONS

OPTIMIZING SLEW RATE

As with all wideband devices, proper decoupling of the power

lines is extremely important. The power supplies should be by-passed

as near to pins 9 and 1 as possible with a parallel grouping of a

0.01µf ceramic disc and a 4.7µf tantalum capacitor. Wideband de-

vices are also sensitive to printed cicuit board layout. Be sure to

keep all runs as short as possible, especially those associated with

the summing junction and power lines. Circuit traces should be sur-

rounded by ground planes whenever possible to reduce unwanted

resistance and inductance. The curve below shows the relationship

between resonant frequency and capacitor value for 3 trace lengths.

When measuring the slew rate of the MSK 739, many external

factors must be taken into consideration to achieve best results. The

closed loop gain of the test fixture should be -1.5V/V or less with

the external feedback resistor being 499Ω Lead length on this resis-

tor must be as short as possible and the resistor should be small. No

short circuit current limit resistors should be used. (Short pin 1 to

pin 12 and pin 9 to pin 10). Pins 2,3,7 and 8 should all be shorted

directly to ground for optimum response. Since the internal feedback

resistor isn't being used, pin 4 should be shorted to pin 5. SMA

connectors are recomended for the input and output connectors to

keep external capacitances to a minimum. To compensate for input

capacitance, a small 0.5 to 5pF high frequency variable capacitor

should be connected in parallel with the feedback resistor. This ca-

pacitor will be adjusted to trim overshoot to a minimum. A 5500V/

µS slew rate limit from -10V to +10V translates to a transition time

of 2.9 nanoseconds. In order to obtain a transition time of that mag-

nitude at the output of the test fixture, the transition time of the

input must be much smaller. A rise time at the input of 500 picosec-

onds or less is sufficient. If the transition time of the input is greater

than 500 picoseconds, the following formula should be used, since

the input transition time is now affecting the measured system tran-

sition time.

TA=√TB²+TC²

WHERE:

TA=Transition time measured at output jack on MSK 739 test card.

TB=Transition time measured at input jack on MSK 739 test card.

TC=Actual output transition time of MSK 739(note that this quantity

will be calculated, not measured directly with the oscilloscope).

FEEDBACK CAPACITANCE

THE MSK 739 IS INVERTING, THEREFORE WHEN MEASURING RIS-

ING EDGE SLEW RATE:

Feedback capacitance is commonly used to compensate for the

"input capacitance" effects of amplifiers. Overshoot and ringing,

especially with capacitive loads, can be reduced or eliminated with

the proper value of feedback capacitance.

All capacitors have a self-resonant frequency. As capacitance in-

creases, self-resonant frequency decreases (assuming all other fac-

tors remain the same). Longer lead lengths and PC traces are other

factors that tend to decrease the self-resonant frequency. When a

feedback capacitor's self-resonant frequency falls within the fre-

quency band for which the amplifier under consideration has gain,

oscillation occurs. These influences place a practical upper limit on

the value of feedback capacitance that can be used. This value is

typically 0.5 to 5pF for the MSK 739(B).

TA=Rise time measured at output

TB=Fall time measured at input

TC=Actual rise time of output

WHEN MEASURING FALLING EDGE SLEW RATE:

TA=Fall time measured at output

TB=Rise time measured at input

TC=Actual fall time of output

LOAD CONSIDERATIONS

When determining the load an amplifier will see, the capacitive

portion must be taken into consideration. For an amplifier that slews

at 1000V/µS, each pF will require 1mA of output current.

To minimize ringing with highly capacitive loads, reduce the load

time constant by adding shunt resistance.

I=C(dV/dT)

CASE CONNECTION

The MSK 739(B) has pin 3 internally connected to the case. The

case is not electrically connected to the internal circuit. Pin 3 should

be tied to a ground plane for sheilding. For special applications,

consult factory.

Rev. A 4/02

TYPICAL PERFORMANCE CURVES

Rev. A 4/02

MECHANICAL SPECIFICATIONS

NOTE:Standard cover height:

MSK 739 0.200 Max.

Alternate lid heights available

NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ORDERING INFORMATION

MSK739 B

SCREENING

BLANK=INDUSTRIAL; B=MIL-PRF-38534 CLASS H

E=EXTENDED RELIABILITY

GENERAL PART NUMBER

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.

Please visit our website for the most recent revision of this datasheet.

Rev. A 4/02

MSK739E [MSK]

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