MSK707 [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: | MSK707 |
厂家: | M.S. KENNEDY CORPORATION |
描述: | ULTRA-ACCURATE/HIGH SLEW RATE INVERTING OPERATIONAL AMPLIFIER |
文件: | 总6页 (文件大小:317K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ISO-9001 CERTIFIED BY DSCC
ULTRA-ACCURATE/HIGH SLEW RATE
INVERTING
OPERATIONAL AMPLIFIER
707
(315) 701-6751
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
MIL-PRF-38534 CERTIFIED
FEATURES:
Very Fast Setting Time - 10nS to 0.1% Typical
Very Fast Slew Rate - 4500 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 CLC207 and KH207
DESCRIPTION:
The MSK 707 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 707 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
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
PIN-OUT INFORMATION
1
2
3
4
5
6
7 Case Ground
High Performance Data Aquisition
Coaxial Line Driver
Data Conversion Circuits
Positive Power Supply
NC
8 Internal Feedback
9 Negative Power Supply
10 Negative Short Circuit
11 Output
Case Ground
NC
High Speed Communications
Ultra High Resolution Video Amplifier
Inverting Input
Non-Inverting Input
12 Positive Short Circuit
PRELIMINARY Rev. - 2/04
1
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range
Lead Temperature Range
(10 Seconds Soldering)
-65°C to +150°C
300°C
Supply Voltage
TST
TLD
VCC
18V
200mA
12V
Peak Output Current
Differential Input Voltage
Thermal Resistance
Junction to Case
IOUT
VIN
Power Dissipation
Junction Temperature
See Curve
150°C
PD
TJ
RTH
46°C/W
Case Operating Temperature Range
(MSK707H/E)
(MSK707)
Output Devices Only
TC
-55°C to+125°C
-40°C to +85°C
ELECTRICAL SPECIFICATIONS
Vcc= 15V Unless Otherwise Specified
Group A
MSK 707H/E
MSK 707
Typ.
Test Conditions
Parameter
Subgroup
Min.
Max.
Min.
Typ.
Max.
Units
STATIC
Supply Voltage Range
Quiescent Current
-
1
± 1±
± 37
-
2
± 18
± 37
± 3ꢁ
-
± 12
± 18
V
± 12
± 1±
± 3±
± 3ꢀ
4±
Vin=0V
Av=-1V/V
-
-
-
± 40
mA
-
-
-
2,3
-
-
-
mA
2
Thermal Resistance
Output Devices Junction to Case
48
°C/W
INPUT
Input Offset Voltage
Input Offset Voltage Drift
Vin=0V Av=-100V/V
Vin=0V
1
-
-
-
-
-
-
-
-
-
-
-
± ±0
± 100
± 7±
µV
µV/°C
nA
-
-
-
-
-
-
-
-
-
-
-
± 2±
± 0.±
± 10
± 1±
±
2
2,3
± 0.7±
± 2.0
± 1.±
2
7
Input Bias Current
Vcm=0V
1
± 20
-
± ꢀ0
± 40
Either Input
Vcm=0V
2,3
-
± 80
nA
2
Input Offset Current
1
10
-
30
nA
20
2,3
-
-
nA
±
40
2
Input Impedance
F=DC Differential
∆Vcc=± ±V
F= 0.1Hz To 10Hz
F=1KHz
-
-
-
-
-
±
-
8
-
MΩ
±
2
Power Supply Rejection Ratio
2
20
-
µV/V
µVp-p
nV√Hz
pA√Hz
1
2
Input Noise Voltage
0.2
4
0.1±
3.8
0.ꢀ
Input Noise Voltage Density
Input Noise Current Density
2
2
-
-
F=1KHz
0.7
-
-
OUTPUT
Output Voltage Swing
RL=100Ω Av=-3V/V F≤10MHz
TJ<1±0°C
4
4
-
± 12.±
± 120
1±
± 10
± 100
-
-
-
-
-
-
V
± 10 ± 12.±
± 100 ± 120
-
-
-
-
-
Output Current
mA
nS
2
Settling Time
1
0.1% 10V step RL=1KΩ
RL=100Ω Vo=± 10V
RL=100Ω
-
10
22
Full Power Bandwidth
4
-
20
1±
MHz
MHz
20
2
Bandwidth (Small Signal)
1ꢁ0
1ꢀ±
17±
220
TRANSFER CHARACTERISTICS
Slew Rate
4±00
10±
VOUT=± 10V RL=1KΩ Av= -1.±V/V
RL=1KΩ F=1KHz VOUT=± 10V
-
3000
100
2±00
ꢁ±
-
-
4±00
110
-
-
V/µS
dB
2
4
Open Loop Voltage Gain
NOTES:
1
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 ("H" suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroups 5 and 6 testing available upon request.
3
4
5
6
TA=TC=+25°C
TA=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.
7
PRELIMINARY Rev. - 2/04
2
APPLICATION NOTES
HEAT SINKING
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.
The value of the short circuit current limit resistors (± RSC) can
be calculated as follows.
+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 707 is equipped with an internal 2KΩ feedback resistor.
Bandwidth and slew rate can be optimized by connecting the MSK
707 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 recom-
mended 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
RθCS=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
APPROXIMATE
DESIRED GAIN
VALUE
Conditions:
1.±KΩ
7±0Ω
1±0Ω
-1
-2
TABLE 1
VCC=± 1ꢀVDC
VO=± 8Vp Sine Wave, Freq.=1KHz
RL=100Ω
-10
Whenever the internal resistor is not being used it is good practice
to short pin 4 and ± 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)
=(1ꢀV-8V) (8V/100Ω)
=0.ꢀ4W
APPROXIMATE
DESIRED GAIN
2.) For conservative design, set TJ=+12±°C
3.) For this example, worst case TA=+ꢁ0°C
4.) RθJC=4±°C/W from MSK 707 Data Sheet
±.) RθCS=0.1±°C/W for most thermal greases
ꢀ.) Rearrange governing equation to solve for RθSA
RI(+)
RI(-)
Rf(Ext)
Cf
1
-1
-2
-±
24ꢁΩ
1ꢀ0Ω
1ꢀꢁΩ
4ꢁꢁΩ
24ꢁΩ
200Ω
4ꢁꢁΩ
4ꢁꢁΩ
1KΩ
2
2
2
1
1
1
1
1
-8
100Ω
ꢁ0.ꢁΩ
100Ω
124Ω
100Ω
100Ω
1KΩ
1KΩ
2KΩ
2
2
2
RθSA=((TJ-TA)/PD) - (RθJC) - (RθCS)
=((12±°C -ꢁ0°C)/0.ꢀ4W) - 4±°C/W - 0.1±°C/W
=±4.7 - 4ꢀ.1±
-10
-20
=ꢁ.±°C/W
OUTPUT SHORT CIRCUIT PROTECTION
The output section of the MSK 707 can be protected from direct
shorts to ground by placing current limit resistors between pins 1
and 12 and pins ꢁ and 10 as shown in Figure 1.
1
2
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.
3
Effective load is RL in parallel with Rf.
3
PRELIMINARY Rev. - 2/04
APPLICATION NOTES CON'T
STABILITY AND LAYOUT CONSIDERATIONS
OPTIMIZING SLEW RATE
As with all wi deband devices, proper decoupling of the power
lines is extremely important. The power supplies should be by-passed
as near to pins ꢁ 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 707, many external
factors must be taken into consideration to achieve best results. The
closed loop gain of the test fixture should be -1.±V/V or less with
the external feedback resistor being 4ꢁꢁΩ. 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 ꢁ to pin 10). Pins 2,3,7 and 4 should all be shorted
directly to ground for optimum response. Since the internal feedback
resistor isn't being used, pin 8 should be shorted to pin ±. 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.± to ±pF 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 ±±00V/
µS slew rate limit from -10V to +10V translates to a transition time
of 2.ꢁ 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 ±00 picosec-
onds or less is sufficient. If the transition time of the input is greater
than ±00 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 707 test card.
TB=Transition time measured at input jack on MSK 707 test card.
TC=Actual output transition time of MSK 707(note that this quantity
will be calculated, not measured directly with the oscilloscope).
FEEDBACK CAPACITANCE
THE MSK 707 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.
TA=Rise time measured at output
TB=Fall time measured at input
TC=Actual rise time of output
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.± to ±pF for the MSK 707.
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 707 has pin 3 and 7 internally connected to the case.
Pin 3 and 7 should be tied to a ground plane for sheilding. For special
applications, consult factory.
4
PRELIMINARY Rev. - 2/04
TYPICAL PERFORMANCE CURVES
5
PRELIMINARY Rev. - 2/04
MECHANICAL SPECIFICATIONS
NOTE: ALL DIMENSIONS ARE ± 0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
MSK707 H
SCREENING
BLANK=INDUSTRIAL; H=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.
PRELIMINARY Rev. - 2/04
6
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