LM7171AIN/NOPB [TI]
OP-AMP, 1500uV OFFSET-MAX, 125MHz BAND WIDTH, PDIP8, 0.300 INCH, PLASTIC, DIP-8;
| 型号： | LM7171AIN/NOPB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OP-AMP, 1500uV OFFSET-MAX, 125MHz BAND WIDTH, PDIP8, 0.300 INCH, PLASTIC, DIP-8 放大器 光电二极管 |
| 文件： | 总22页 (文件大小：1084K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM7171
LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier
Literature Number: SNOS760A
May 2006
LM7171
Very High Speed, High Output Current, Voltage
Feedback Amplifier
General Description
Features
The LM7171 is a high speed voltage feedback amplifier that
has the slewing characteristic of a current feedback ampli-
fier; yet it can be used in all traditional voltage feedback
amplifier configurations. The LM7171 is stable for gains as
low as +2 or −1. It provides a very high slew rate at 4100V/µs
and a wide unity-gain bandwidth of 200 MHz while consum-
ing only 6.5 mA of supply current. It is ideal for video and
high speed signal processing applications such as HDSL
and pulse amplifiers. With 100 mA output current, the
LM7171 can be used for video distribution, as a transformer
driver or as a laser diode driver.
(Typical Unless Otherwise Noted)
n Easy-to-use voltage feedback topology
n Very high slew rate: 4100 V/µs
n Wide unity-gain bandwidth: 200 MHz
n −3 dB frequency AV = +2: 220 MHz
n Low supply current: 6.5 mA
n High open loop gain: 85 dB
n High output current: 100 mA
n Differential gain and phase: 0.01%, 0.02˚
n Specified for 15V and 5V operation
@
Operation on 15V power supplies allows for large signal
swings and provides greater dynamic range and signal-to-
noise ratio. The LM7171 offers low SFDR and THD, ideal for
ADC/DAC systems. In addition, the LM7171 is specified for
5V operation for portable applications.
Applications
n HDSL and ADSL drivers
n Multimedia broadcast systems
n Professional video cameras
n Video amplifiers
™
The LM7171 is built on National’s advanced VIP III (Verti-
cally integrated PNP) complementary bipolar process.
n Copiers/scanners/fax
n HDTV amplifiers
n Pulse amplifiers and peak detectors
n CATV/fiber optics signal processing
Typical Performance
Large Signal Pulse Response
AV = +2, VS 15V
=
01238501
™
VIP is a trademark of National Semiconductor Corporation.
© 2006 National Semiconductor Corporation
DS012385
www.national.com
Absolute Maximum Ratings (Note 1)
Maximum Junction Temperature
(Note 4)
150˚C
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Operating Ratings (Note 1)
Supply Voltage
ESD Tolerance (Note 2)
Supply Voltage (V+–V−)
Differential Input Voltage (Note 11)
Output Short Circuit to Ground
(Note 3)
2.5 kV
36V
5.5V ≤ VS ≤ 36V
Junction Temperature Range
LM7171AI, LM7171BI
10V
−40˚C ≤ TJ ≤ +85˚C
Thermal Resistance (θJA
)
Continuous
8-Pin MDIP
108˚C/W
172˚C/W
Storage Temperature Range
−65˚C to +150˚C
8-Pin SOIC
15V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ. Boldface
limits apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
LM7171AI
LM7171BI
Units
(Note 5)
Limit
Limit
(Note 6)
(Note 6)
VOS
TC VOS
IB
Input Offset Voltage
0.2
35
1
3
mV
max
4
7
Input Offset Voltage
Average Drift
µV/˚C
Input Bias Current
2.7
0.1
10
12
4
10
12
4
µA
max
µA
IOS
Input Offset Current
Input Resistance
6
6
max
MΩ
RIN
Common Mode
40
3.3
15
Differential Mode
RO
Open Loop Output
Resistance
Ω
CMRR
PSRR
VCM
AV
Common Mode
Rejection Ratio
Power Supply
VCM
VS
=
10V
105
90
85
80
85
80
75
70
75
70
dB
min
dB
min
V
=
15V to 5V
Rejection Ratio
Input Common-Mode
Voltage Range
Large Signal Voltage
Gain (Note 7)
>
CMRR 60 dB
13.35
85
RL = 1 kΩ
80
75
75
70
dB
min
dB
RL = 100Ω
RL = 1 kΩ
81
75
70
70
66
min
V
VO
Output Swing
13.3
−13.2
11.8
−10.5
118
13
13
12.7
−13
−12.7
10.5
9.5
−9.5
−9
12.7
−13
−12.7
10.5
9.5
−9.5
−9
min
V
max
V
RL = 100Ω
min
V
max
mA
min
mA
max
Output Current
(Open Loop)
(Note 8)
Sourcing, RL = 100Ω
Sinking, RL = 100Ω
105
95
105
95
105
95
95
90
90
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2
15V DC Electrical Characteristics (Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ. Boldface
limits apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7171AI
Limit
LM7171BI
Limit
Units
(Note 6)
(Note 6)
Output Current
Sourcing, RL = 100Ω
Sinking, RL = 100Ω
Sourcing
100
100
140
135
6.5
mA
mA
(in Linear Region)
Output Short Circuit
Current
ISC
IS
Sinking
Supply Current
8.5
8.5
mA
9.5
9.5
max
15V AC Electrical Characteristics
Unless otherwise specified, TJ = 25˚C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ.
Typ
LM7171AI
LM7171BI
Limit
Symbol
Parameter
Slew Rate (Note 9)
Conditions
(Note 5)
Limit
Units
(Note 6)
(Note 6)
SR
AV = +2, VIN = 13 VPP
AV = +2, VIN = 10 VPP
4100
3100
200
220
50
V/µs
Unity-Gain Bandwidth
−3 dB Frequency
Phase Margin
MHz
MHz
Deg
ns
AV = +2
φm
ts
Settling Time (0.1%)
AV = −1, VO
RL = 500Ω
AV = −2, VIN
RL = 500Ω
=
5V
42
tp
Propagation Delay
=
5V,
5
ns
AD
Differential Gain (Note 10)
Differential Phase (Note 10)
Second Harmonic (Note 12)
0.01
0.02
−110
−75
%
φD
Deg
dBc
dBc
dBc
dBc
fIN = 10 kHz
fIN = 5 MHz
fIN = 10 kHz
fIN = 5 MHz
f = 10 kHz
Third Harmonic (Note 12)
−115
−55
en
Input-Referred
Voltage Noise
Input-Referred
Current Noise
14
in
f = 10 kHz
1.5
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Boldface limits
apply at the temperature extremes
Typ
LM7171AI
Limit
(Note 6)
1.5
LM7171BI
Limit
(Note 6)
3.5
Symbol
VOS
TC VOS
IB
Parameter
Conditions
(Note 5)
Units
Input Offset Voltage
0.3
35
mV
max
4
7
Input Offset Voltage
Average Drift
µV/˚C
Input Bias Current
3.3
0.1
10
12
4
10
12
4
µA
max
µA
IOS
Input Offset Current
3
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5V DC Electrical Characteristics (Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Boldface limits
apply at the temperature extremes
Typ
LM7171AI
Limit
LM7171BI
Limit
Symbol
Parameter
Conditions
(Note 5)
Units
(Note 6)
6
(Note 6)
6
max
RIN
Input Resistance
Common Mode
Differential Mode
40
3.3
15
MΩ
RO
Output Resistance
Common Mode
Rejection Ratio
Power Supply
Ω
dB
min
dB
min
V
CMRR
VCM
VS
=
2.5V
104
80
75
85
80
70
65
75
70
PSRR
VCM
AV
=
15V to 5V
90
3.2
78
Rejection Ratio
Input Common-Mode
Voltage Range
>
CMRR 60 dB
RL = 1 kΩ
Large Signal Voltage
Gain (Note 7)
75
70
70
65
dB
min
dB
RL = 100Ω
RL = 1 kΩ
76
72
68
67
63
min
V
VO
Output Swing
3.4
−3.4
3.1
−3.0
31
3.2
3
3.2
3
min
V
−3.2
−3
−3.2
−3
max
V
RL = 100Ω
2.9
2.8
−2.9
−2.8
29
2.9
2.8
−2.9
−2.8
29
min
V
max
mA
min
mA
max
mA
Output Current
Sourcing, RL = 100Ω
Sinking, RL = 100Ω
(Open Loop) (Note 8)
28
28
30
29
29
28
28
ISC
IS
Output Short Circuit
Current
Sourcing
Sinking
135
100
6.2
Supply Current
8
8
mA
9
9
max
5V AC Electrical Characteristics
Unless otherwise specified, TJ = 25˚C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ.
Typ
LM7171AI LM7171BI
Symbol
Parameter
Slew Rate (Note 9)
Conditions
AV = +2, VIN = 3.5 VPP
AV = +2
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
SR
950
125
140
57
V/µs
MHz
MHz
Deg
ns
Unity-Gain Bandwidth
−3 dB Frequency
Phase Margin
φm
ts
Settling Time (0.1%)
AV = −1, VO
RL = 500Ω
AV = −2, VIN
RL = 500Ω
=
1V,
1V,
56
tp
Propagation Delay
=
6
ns
AD
Differential Gain (Note 1)
0.02
0.03
%
φD
Differential Phase (Note 10)
Deg
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4
5V AC Electrical Characteristics (Continued)
Unless otherwise specified, TJ = 25˚C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ.
Typ
LM7171AI LM7171BI
Symbol
Parameter
Conditions
fIN = 10 kHz
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
Second Harmonic (Note 12)
Third Harmonic (Note 12)
−102
−70
−110
−51
14
dBc
dBc
dBc
dBc
fIN = 5 MHz
fIN = 10 kHz
fIN = 5 MHz
f = 10 kHz
en
Input-Referred
Voltage Noise
Input-Referred
Current Noise
in
f = 10 kHz
1.8
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the
maximum allowed junction temperature of 150˚C.
Note 4: The maximum power dissipation is a function of T
, θ , and T . The maximum allowable power dissipation at any ambient temperature is P =
A D
J(MAX) JA
(T
–T )/θ . All numbers apply for packages soldered directly into a PC board.
J(MAX)
A JA
Note 5: Typical values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: Large signal voltage gain is the total output swing divided by the input signal required to produce that swing. For V
=
15V, V
=
5V. For V =
S
5V,
S
OUT
V
=
1V.
OUT
Note 8: The open loop output current is guaranteed, by the measurement of the open loop output voltage swing, using 100Ω output load.
Note 9: Slew Rate is the average of the raising and falling slew rates.
Note 10: Differential gain and phase are measured with A = +2, V = 1 V at 3.58 MHz and both input and output 75Ω terminated.
V
IN
PP
Note 11: Input differential voltage is applied at V
=
15V.
S
Note 12: Harmonics are measured with V = 1 V , A = +2 and R = 100Ω.
IN
PP
V
L
Note 13: The THD measurement at low frequency is limited by the test instrument.
Connection Diagram
8-Pin DIP/SO
01238502
Top View
Ordering Information
Package
Temperature Range
Transport
NSC
Media
Drawing
Industrial
Military
−40˚C to +85˚C
LM7171AIM
LM7171AIMX
LM7171BIM
LM7171BIMX
LM7171AIN
LM7171BIN
−55˚C to +125˚C
Rails
Tape and Reel
Rails
8-Pin SOIC
8-Pin MDIP
M08A
N08E
Tape and Reel
Rails
Rails
5
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Typical Performance Characteristics unless otherwise noted, TA= 25˚C
Supply Current vs. Supply Voltage
Supply Current vs. Temperature
01238563
01238564
Input Offset Voltage vs. Temperature
Input Bias Current vs. Temperature
01238566
01238565
Short Circuit Current vs. Temperature (Sourcing)
Short Circuit Current vs. Temperature (Sinking)
01238567
01238568
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6
Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Output Voltage vs. Output Current
Output Voltage vs. Output Current
01238569
01238570
CMRR vs. Frequency
PSRR vs. Frequency
01238571
01238572
PSRR vs. Frequency
Open Loop Frequency Response
01238573
01238551
7
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Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Open Loop Frequency Response
Gain-Bandwidth Product vs. Supply Voltage
01238553
01238552
Gain-Bandwidth Product vs. Load Capacitance
Large Signal Voltage Gain vs. Load
01238555
01238554
Large Signal Voltage Gain vs. Load
Input Voltage Noise vs. Frequency
01238556
01238557
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8
Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Input Voltage Noise vs. Frequency
Input Current Noise vs. Frequency
Slew Rate vs. Input Voltage
Input Current Noise vs. Frequency
01238558
01238559
Slew Rate vs. Supply Voltage
01238561
01238560
Slew Rate vs. Load Capacitance
01238562
01238523
9
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Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Open Loop Output Impedance vs. Frequency
Open Loop Output Impedance vs Frequency
01238525
01238526
Large Signal Pulse Response
Large Signal Pulse Response
AV = −1, VS
=
15V
AV = −1, VS
=
5V
01238527
01238528
Large Signal Pulse Response
AV = +2, VS 15V
Large Signal Pulse Response
AV = +2, VS 5V
=
=
01238529
01238530
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10
Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Small Signal Pulse Response
AV = −1, VS 15V
Small Signal Pulse Response
AV = −1, VS 5V
=
=
01238531
01238532
Small Signal Pulse Response
AV = +2, VS 15V
Small Signal Pulse Response
AV = +2, VS 5V
=
=
01238533
01238534
Closed Loop Frequency Response vs. Supply Voltage
(AV = +2)
Closed Loop Frequency Response vs. Capacitive Load
(AV = +2)
01238535
01238536
11
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Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Closed Loop Frequency Response vs. Capacitive Load
(AV = +2)
Closed Loop Frequency Response vs. Input Signal Level
(AV = +2)
01238537
01238538
Closed Loop Frequency Response vs. Input Signal Level
(AV = +2)
Closed Loop Frequency Response vs. Input Signal Level
(AV = +2)
01238543
01238539
Closed Loop Frequency Response vs. Input Signal Level
(AV = +2)
Closed Loop Frequency Response vs. Input Signal Level
(AV = +4)
01238540
01238544
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12
Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Closed Loop Frequency Response vs. Input Signal Level
(AV = +4)
Closed Loop Frequency Response vs. Input Signal Level
(AV = +4)
01238545
01238541
Closed Loop Frequency Response vs. Input Signal Level
(AV = +4)
Total Harmonic Distortion vs. Frequency (Note 13)
01238546
01238542
Total Harmonic Distortion vs. Frequency (Note 13)
Undistorted Output Swing vs. Frequency
01238547
01238549
13
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Typical Performance Characteristics unless otherwise noted, TA= 25˚C (Continued)
Undistorted Output Swing vs. Frequency
Undistorted Output Swing vs. Frequency
01238548
01238550
Harmonic Distortion vs. Frequency (Note 13)
Harmonic Distortion vs. Frequency (Note 13)
01238574
01238575
Maximum Power Dissipation vs. Ambient Temperature
01238520
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14
Simplified Schematic Diagram
01238509
Note: M1 and M2 are current mirrors.
15
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LAYOUT CONSIDERATION
Application Notes
Printed Circuit Board and High Speed Op Amps
PERFORMANCE DISCUSSION
There are many things to consider when designing PC
boards for high speed op amps. Without proper caution, it is
very easy to have excessive ringing, oscillation and other
degraded AC performance in high speed circuits. As a rule,
the signal traces should be short and wide to provide low
inductance and low impedance paths. Any unused board
space needs to be grounded to reduce stray signal pickup.
Critical components should also be grounded at a common
point to eliminate voltage drop. Sockets add capacitance to
the board and can affect high frequency performance. It is
better to solder the amplifier directly into the PC board
without using any socket.
The LM7171 is a very high speed, voltage feedback ampli-
fier. It consumes only 6.5 mA supply current while providing
a unity-gain bandwidth of 200 MHz and a slew rate of
4100V/µs. It also has other great features such as low
differential gain and phase and high output current.
The LM7171 is a true voltage feedback amplifier. Unlike
current feedback amplifiers (CFAs) with a low inverting input
impedance and a high non-inverting input impedance, both
inputs of voltage feedback amplifiers (VFAs) have high im-
pedance nodes. The low impedance inverting input in CFAs
and a feedback capacitor create an additional pole that will
lead to instability. As a result, CFAs cannot be used in
traditional op amp circuits such as photodiode amplifiers,
I-to-V converters and integrators where a feedback capacitor
is required.
Using Probes
Active (FET) probes are ideal for taking high frequency
measurements because they have wide bandwidth, high
input impedance and low input capacitance. However, the
probe ground leads provide a long ground loop that will
produce errors in measurement. Instead, the probes can be
grounded directly by removing the ground leads and probe
jackets and using scope probe jacks.
CIRCUIT OPERATION
The class AB input stage in LM7171 is fully symmetrical and
has a similar slewing characteristic to the current feedback
amplifiers. In the LM7171 Simplified Schematic, Q1 through
Q4 form the equivalent of the current feedback input buffer,
RE the equivalent of the feedback resistor, and stage A
buffers the inverting input. The triple-buffered output stage
isolates the gain stage from the load to provide low output
impedance.
Component Selection and Feedback Resistor
It is important in high speed applications to keep all compo-
nent leads short. For discrete components, choose carbon
composition-type resistors and mica-type capacitors. Sur-
face mount components are preferred over discrete compo-
nents for minimum inductive effect.
SLEW RATE CHARACTERISTIC
The slew rate of LM7171 is determined by the current avail-
able to charge and discharge an internal high impedance
node capacitor. This current is the differential input voltage
divided by the total degeneration resistor RE. Therefore, the
slew rate is proportional to the input voltage level, and the
higher slew rates are achievable in the lower gain configu-
rations. A curve of slew rate versus input voltage level is
provided in the “Typical Performance Characteristics”.
Large values of feedback resistors can couple with parasitic
capacitance and cause undesirable effects such as ringing
or oscillation in high speed amplifiers. For LM7171, a feed-
back resistor of 510Ω gives optimal performance.
COMPENSATION FOR INPUT CAPACITANCE
The combination of an amplifier’s input capacitance with the
gain setting resistors adds a pole that can cause peaking or
oscillation. To solve this problem, a feedback capacitor with
a value
When a very fast large signal pulse is applied to the input of
an amplifier, some overshoot or undershoot occurs. By plac-
ing an external resistor such as 1 kΩ in series with the input
of LM7171, the bandwidth is reduced to help lower the
overshoot.
>
CF (RG x CIN)/RF
can be used to cancel that pole. For LM7171, a feedback
capacitor of 2 pF is recommended. Figure 1 illustrates the
compensation circuit.
SLEW RATE LIMITATION
If the amplifier’s input signal has too large of an amplitude at
too high of a frequency, the amplifier is said to be slew rate
limited; this can cause ringing in time domain and peaking in
frequency domain at the output of the amplifier.
In the “Typical Performance Characteristics” section, there
are several curves of AV = +2 and AV = +4 versus input
signal levels. For the AV = +4 curves, no peaking is present
and the LM7171 responds identically to the different input
signal levels of 30 mV, 100 mV and 300 mV.
For the AV = +2 curves, with slight peaking occurs. This
>
peaking at high frequency ( 100 MHz) is caused by a large
01238510
input signal at high enough frequency that exceeds the
amplifier’s slew rate. The peaking in frequency response
does not limit the pulse response in time domain, and the
LM7171 is stable with noise gain of ≥+2.
FIGURE 1. Compensating for Input Capacitance
POWER SUPPLY BYPASSING
Bypassing the power supply is necessary to maintain low
power supply impedance across frequency. Both positive
and negative power supplies should be bypassed individu-
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16
To minimize reflection, coaxial cable with matching charac-
teristic impedance to the signal source should be used. The
other end of the cable should be terminated with the same
value terminator or resistor. For the commonly used cables,
RG59 has 75Ω characteristic impedance, and RG58 has
50Ω characteristic impedance.
Application Notes (Continued)
ally by placing 0.01 µF ceramic capacitors directly to power
supply pins and 2.2 µF tantalum capacitors close to the
power supply pins.
DRIVING CAPACITIVE LOADS
Amplifiers driving capacitive loads can oscillate or have ring-
ing at the output. To eliminate oscillation or reduce ringing,
an isolation resistor can be placed as shown below in Figure
5. The combination of the isolation resistor and the load
capacitor forms a pole to increase stability by adding more
phase margin to the overall system. The desired perfor-
mance depends on the value of the isolation resistor; the
bigger the isolation resistor, the more damped the pulse
response becomes. For LM7171, a 50Ω isolation resistor is
recommended for initial evaluation. Figure 6 shows the
LM7171 driving a 150 pF load with the 50Ω isolation resistor.
01238511
FIGURE 2. Power Supply Bypassing
TERMINATION
In high frequency applications, reflections occur if signals
are not properly terminated. Figure 3 shows a properly ter-
minated signal while Figure 4 shows an improperly termi-
nated signal.
01238512
FIGURE 5. Isolation Resistor Used
to Drive Capacitive Load
01238517
FIGURE 3. Properly Terminated Signal
01238513
FIGURE 6. The LM7171 Driving a 150 pF Load
with a 50Ω Isolation Resistor
POWER DISSIPATION
The maximum power allowed to dissipate in a device is
defined as:
PD = (TJ(MAX) − TA)/θJA
Where
PD
is the power dissipation in a device
TJ(max) is the maximum junction temperature
TA
is the ambient temperature
01238518
θJA
is the thermal resistance of a particular package
FIGURE 4. Improperly Terminated Signal
For example, for the LM7171 in a SO-8 package, the maxi-
mum power dissipation at 25˚C ambient temperature is
730 mW.
17
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Application Notes (Continued)
Multivibrator
Thermal resistance, θJA, depends on parameters such as
die size, package size and package material. The smaller
the die size and package, the higher θJA becomes. The 8-pin
DIP package has a lower thermal resistance (108˚C/W) than
that of 8-pin SO (172˚C/W). Therefore, for higher dissipation
capability, use an 8-pin DIP package.
The total power dissipated in a device can be calculated as:
PD = PQ + PL
PQ is the quiescent power dissipated in a device with no load
connected at the output. PL is the power dissipated in the
device with a load connected at the output; it is not the power
dissipated by the load.
01238515
Furthermore,
PQ: = supply current x total supply voltage with no load
PL: = output current x (voltage difference between sup-
ply voltage and output voltage of the same side of
supply voltage)
01238581
For example, the total power dissipated by the LM7171 with
VS
PD = PQ + PL
= (6.5 mA) x (30V) + (10 mA) x (15V − 10V)
=
15V and output voltage of 10V into 1 kΩ is
Pulse Width Modulator
= 195 mW + 50 mW
= 245 mW
Application Circuit
Fast Instrumentation Amplifier
01238516
Video Line Driver
01238514
01238521
01238580
www.national.com
18
Physical Dimensions inches (millimeters) unless otherwise noted
8-Pin SOIC
NS Package Number M08A
8-Pin MDIP
NS Package Number N08E
19
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Notes
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