LM6171BIM/NOPB [TI]

高速、低功耗、低失真电压反馈放大器 | D | 8 | -40 to 85;
LM6171BIM/NOPB
型号: LM6171BIM/NOPB
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

高速、低功耗、低失真电压反馈放大器 | D | 8 | -40 to 85

放大器 光电二极管
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LM6171  
www.ti.com  
SNOS745C MAY 1998REVISED MARCH 2013  
LM6171 High Speed Low Power Low Distortion Voltage Feedback Amplifier  
Check for Samples: LM6171  
1
FEATURES  
DESCRIPTION  
The LM6171 is a high speed unity-gain stable voltage  
feedback amplifier. It offers a high slew rate of  
3600V/μs and a unity-gain bandwidth of 100 MHz  
while consuming only 2.5 mA of supply current. The  
LM6171 has very impressive AC and DC  
performance which is a great benefit for high speed  
signal processing and video applications.  
23  
(Typical Unless Otherwise Noted)  
Easy-To-Use Voltage Feedback Topology  
Very High Slew Rate: 3600V/μs  
Wide Unity-Gain-Bandwidth Product: 100 MHz  
3dB Frequency @ AV = +2: 62 MHz  
Low Supply Current: 2.5 mA  
The ±15V power supplies allow for large signal  
swings and give greater dynamic range and signal-to-  
noise ratio. The LM6171 has high output current  
drive, low SFDR and THD, ideal for ADC/DAC  
systems. The LM6171 is specified for ±5V operation  
for portable applications.  
High CMRR: 110 dB  
High Open Loop Gain: 90 dB  
Specified for ±15V and ±5V Operation  
APPLICATIONS  
The LM6171 is built on TI's advanced VIP III  
(Vertically Integrated PNP) complementary bipolar  
process.  
Multimedia Broadcast Systems  
Line Drivers, Switchers  
Video Amplifiers  
NTSC, PAL® and SECAM Systems  
ADC/DAC Buffers  
HDTV Amplifiers  
Pulse Amplifiers and Peak Detectors  
Instrumentation Amplifier  
Active Filters  
CONNECTION DIAGRAM  
Figure 1. Top View  
8-Pin SOIC/PDIP  
See Package Number D (SOIC) or  
See Package Number P (PDIP)  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
PAL is a registered trademark of and used under lisence from Advanced Micro Devices, Inc..  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1998–2013, Texas Instruments Incorporated  
LM6171  
SNOS745C MAY 1998REVISED MARCH 2013  
www.ti.com  
Absolute Maximum Ratings(1)(2)  
ESD Tolerance(3)  
Supply Voltage (V+–V)  
2.5 kV  
36V  
Differential Input Voltage  
±10V  
Common-Mode Voltage Range  
Input Current  
V++0.3V to V0.3V  
±10mA  
Output Short Circuit to Ground(4)  
Storage Temperature Range  
Maximum Junction Temperature(5)  
Soldering Information  
Continuous  
65°C to +150°C  
150°C  
Infrared or Convection Reflow  
(20 sec.)  
235°C  
Wave Soldering Lead Temp  
(10 sec.)  
260°C  
(1) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and  
specifications.  
(2) 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.  
(3) Human body model, 1.5 kΩ in series with 100 pF.  
(4) Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature  
of 150°C.  
(5) The maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any ambient  
temperature is PD = (TJ(max) TA)/θJA. All numbers apply for packages soldered directly into a PC board.  
Operating Ratings(1)  
Supply Voltage  
5.5V VS 34V  
40°C to +85°C  
108°C/W  
Operating Temperature Range  
LM6171AI, LM6171BI  
P Package, 8-Pin PDIP  
D Package, 8-Pin SOIC  
Thermal Resistance (θJA  
)
172°C/W  
(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.  
2
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LM6171  
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SNOS745C MAY 1998REVISED MARCH 2013  
±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  
LM6171AI  
LM6171BI  
Units  
(1)  
Limit  
Limit  
(2)  
(2)  
VOS  
Input Offset Voltage  
1.5  
3
6
mV  
max  
μV/°C  
μA  
5
8
TC VOS  
IB  
Input Offset Voltage Average Drift  
Input Bias Current  
6
1
3
4
2
3
3
4
2
3
max  
μA  
IOS  
Input Offset Current  
Input Resistance  
0.03  
max  
RIN  
Common Mode  
40  
4.9  
14  
MΩ  
Differential Mode  
RO  
Open Loop Output Resistance  
Common Mode Rejection Ratio  
Ω
dB  
CMRR  
VCM = ±10V  
110  
80  
75  
85  
80  
75  
70  
80  
75  
min  
dB  
PSRR  
Power Supply Rejection Ratio  
VS = ±15V to ±5V  
95  
min  
V
VCM  
AV  
Input Common-Mode Voltage Range  
Large Signal Voltage Gain(3)  
CMRR 60 dB  
RL = 1 kΩ  
±13.5  
90  
80  
70  
80  
70  
dB  
min  
dB  
RL = 100Ω  
RL = 1 kΩ  
83  
70  
70  
60  
60  
min  
V
VO  
Output Swing  
13.3  
13.3  
11.6  
10.5  
116  
12.5  
12  
12.5  
12  
min  
V
12.5  
12  
9
12.5  
12  
9
max  
V
RL = 100Ω  
8.5  
9  
8.5  
9  
min  
V
8.5  
90  
8.5  
90  
max  
mA  
min  
mA  
max  
mA  
mA  
mA  
mA  
mA  
max  
Continuous Output Current (Open Loop)(4) Sourcing, RL = 100Ω  
Sinking, RL = 100Ω  
85  
85  
105  
90  
90  
85  
85  
Continuous Output Current (in Linear  
Region)  
Sourcing, RL = 10Ω  
Sinking, RL = 10Ω  
Sourcing  
100  
80  
ISC  
Output Short Circuit Current  
135  
135  
2.5  
Sinking  
IS  
Supply Current  
4
4
4.5  
4.5  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are guaranteed by testing or statistical analysis.  
(3) Large signal voltage gain is the total output swing divided by the input signal required to produce that swing. For VS = ±15V, VOUT  
±5V. For VS = +5V, VOUT = ±1V.  
=
(4) The open loop output current is the output swing with the 100Ω load resistor divided by that resistor.  
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LM6171  
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±15V AC 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  
LM6171AI  
LM6171BI  
Units  
(1)  
Limit  
Limit  
(2)  
(2)  
SR  
Slew Rate(3)  
AV = +2, VIN = 13 VPP  
AV = +2, VIN = 10 VPP  
3600  
3000  
100  
160  
62  
V/μs  
GBW  
Unity Gain-Bandwidth Product  
MHz  
MHz  
MHz  
deg  
3 dB Frequency  
AV = +1  
AV = +2  
φm  
Phase Margin  
40  
ts  
Settling Time (0.1%)  
AV = 1, VOUT = ±5V RL  
500Ω  
=
48  
6
ns  
ns  
Propagation Delay  
VIN = ±5V, RL = 500Ω, AV  
2  
=
AD  
φD  
en  
in  
Differential Gain(4)  
Differential Phase(4)  
0.03  
0.5  
12  
%
deg  
Input-Referred Voltage Noise  
Input-Referred Current Noise  
f = 1 kHz  
f = 1 kHz  
nV/Hz  
pA/Hz  
1
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are guaranteed by testing or statistical analysis.  
(3) Slew rate is the average of the rising and falling slew rates.  
(4) Differential gain and phase are measured with AV = +2, VIN = 1 VPP at 3.58 MHz and both input and output 75Ω terminated.  
4
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LM6171  
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SNOS745C MAY 1998REVISED MARCH 2013  
±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  
Symbol  
Parameter  
Conditions  
Typ  
LM6171AI  
LM6171BI  
Units  
(1)  
Limit  
Limit  
(2)  
(2)  
VOS  
Input Offset Voltage  
1.2  
3
6
mV  
max  
μV/°C  
μA  
5
8
TC VOS  
IB  
Input Offset Voltage Average Drift  
Input Bias Current  
4
1
2.5  
3.5  
1.5  
2.2  
2.5  
3.5  
1.5  
2.2  
max  
μA  
IOS  
Input Offset Current  
Input Resistance  
0.03  
max  
MΩ  
RIN  
Common Mode  
40  
4.9  
14  
Differential Mode  
RO  
Open Loop Output Resistance  
Common Mode Rejection Ratio  
Ω
CMRR  
VCM = ±2.5V  
105  
80  
75  
85  
80  
75  
70  
80  
75  
dB  
min  
dB  
PSRR  
Power Supply Rejection Ratio  
VS = ±15V to ±5V  
95  
min  
VCM  
AV  
Input Common-Mode Voltage  
Range  
Large Signal Voltage Gain(3)  
CMRR 60 dB  
RL = 1 kΩ  
±3.7  
84  
V
75  
65  
75  
65  
dB  
min  
dB  
RL = 100Ω  
RL = 1 kΩ  
80  
3.5  
3.4  
3.2  
3.0  
32  
70  
70  
60  
60  
min  
V
VO  
Output Swing  
3.2  
3
3.2  
3
min  
V
3.2  
3  
3.2  
3  
max  
V
RL = 100Ω  
2.8  
2.5  
2.8  
2.5  
28  
2.8  
2.5  
2.8  
2.5  
28  
min  
V
max  
mA  
min  
mA  
max  
mA  
mA  
mA  
max  
Continuous Output Current (Open Sourcing, RL = 100Ω  
Loop)(4)  
25  
25  
Sinking, RL = 100Ω  
30  
28  
28  
25  
25  
ISC  
Output Short Circuit Current  
Supply Current  
Sourcing  
Sinking  
130  
100  
2.3  
IS  
3
3
3.5  
3.5  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are guaranteed by testing or statistical analysis.  
(3) Large signal voltage gain is the total output swing divided by the input signal required to produce that swing. For VS = ±15V, VOUT  
±5V. For VS = +5V, VOUT = ±1V.  
=
(4) The open loop output current is the output swing with the 100Ω load resistor divided by that resistor.  
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LM6171  
SNOS745C MAY 1998REVISED MARCH 2013  
www.ti.com  
±5V AC 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  
Symbol  
Parameter  
Conditions  
Typ  
LM6171AI  
LM6171BI  
Units  
(1)  
Limit  
Limit  
(2)  
(2)  
SR  
Slew Rate(3)  
AV = +2, VIN = 3.5 VPP  
750  
70  
V/μs  
MHz  
MHz  
GBW  
Unity Gain-Bandwidth Product  
3 dB Frequency  
AV = +1  
AV = +2  
130  
45  
φm  
Phase Margin  
57  
deg  
ns  
ts  
Settling Time (0.1%)  
AV = 1, VOUT = +1V, RL  
500Ω  
=
60  
8
Propagation Delay  
VIN = ±1V, RL = 500Ω, AV  
2  
=
ns  
AD  
φD  
en  
in  
Differential Gain(4)  
Differential Phase(4)  
0.04  
0.7  
11  
%
deg  
Input-Referred Voltage Noise  
Input-Referred Current Noise  
f = 1 kHz  
f = 1 kHz  
nV/Hz  
pA/Hz  
1
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are guaranteed by testing or statistical analysis.  
(3) Slew rate is the average of the rising and falling slew rates.  
(4) Differential gain and phase are measured with AV = +2, VIN = 1 VPP at 3.58 MHz and both input and output 75Ω terminated.  
6
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Typical Performance Characteristics  
Unless otherwise noted, TA = 25°C  
Supply Current  
Supply Current  
vs.  
Temperature  
vs.  
Supply Voltage  
Figure 2.  
Figure 3.  
Input Offset Voltage  
vs.  
Input Bias Current  
vs.  
Temperature  
Temperature  
Figure 4.  
Figure 5.  
Input Offset Voltage  
vs.  
Common Mode Voltage  
Short Circuit Current  
vs.  
Temperature (Sourcing)  
Figure 6.  
Figure 7.  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Short Circuit Current  
Output Voltage  
vs.  
Output Current  
vs.  
Temperature (Sinking)  
Figure 8.  
Figure 9.  
Output Voltage  
vs.  
Output Current  
CMRR  
vs.  
Frequency  
Figure 10.  
Figure 11.  
PSRR  
vs.  
Frequency  
PSRR  
vs.  
Frequency  
Figure 12.  
Figure 13.  
8
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Open Loop Frequency Response  
Open Loop Frequency Response  
Figure 14.  
Figure 15.  
Gain Bandwidth Product  
vs.  
Gain Bandwidth Product  
vs.  
Supply Voltage  
Load Capacitance  
Figure 16.  
Figure 17.  
Large Signal Voltage Gain  
Large Signal Voltage Gain  
vs.  
vs.  
Load  
Load  
Figure 18.  
Figure 19.  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Input Voltage Noise  
Input Voltage Noise  
vs.  
vs.  
Frequency  
Frequency  
Figure 20.  
Figure 21.  
Input Current Noise  
vs.  
Input Current Noise  
vs.  
Frequency  
Frequency  
Figure 22.  
Figure 23.  
Slew Rate  
vs.  
Supply Voltage  
Slew Rate  
vs.  
Input Voltage  
Figure 24.  
Figure 25.  
10  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Slew Rate  
Open Loop Output Impedance  
vs.  
vs.  
Load Capacitance  
Frequency  
Figure 26.  
Figure 27.  
Open Loop Output Impedance  
vs.  
Large Signal Pulse Response  
Frequency  
AV = 1, VS = ±15V  
Figure 28.  
Figure 29.  
Large Signal Pulse Response  
Large Signal Pulse Response  
AV = +1, VS = ±15V  
AV = 1, VS = ±5V  
Figure 30.  
Figure 31.  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Large Signal Pulse Response  
Large Signal Pulse Response  
AV = +2, VS = ±15V  
AV = +1, VS = ±5V  
Figure 32.  
Figure 33.  
Large Signal Pulse Response  
AV = +2, VS = ±5V  
Small Signal Pulse Response  
AV = 1, VS = ±15V  
Figure 34.  
Figure 35.  
Small Signal Pulse Response  
Small Signal Pulse Response  
AV = +1, VS = ±15V  
AV = 1, VS = ±5V  
Figure 36.  
Figure 37.  
12  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Small Signal Pulse Response  
Small Signal Pulse Response  
AV = +2, VS = ±15V  
AV = +1, VS = ±5V  
Figure 38.  
Figure 39.  
Closed Loop Frequency Response  
vs.  
Small Signal Pulse Response  
AV = +2, VS = ±5V  
SupplyVoltage  
(AV = +1)  
Figure 40.  
Figure 41.  
Closed Loop Frequency Response  
Closed Loop Frequency Response  
vs.  
vs.  
Supply Voltage  
(AV = +2)  
Capacitive Load  
(AV = +1)  
Figure 42.  
Figure 43.  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Closed Loop Frequency Response  
Closed Loop Frequency Response  
vs.  
vs.  
Capacitive Load  
(AV = +1)  
Capacitive Load  
(AV = +2)  
Figure 44.  
Figure 45.  
Closed Loop Frequency Response  
vs.  
Total Harmonic Distortion  
Capacitive Load  
(AV = +2)  
vs.  
Frequency  
Figure 46.  
Figure 47.  
Total Harmonic Distortion  
Total Harmonic Distortion  
vs.  
vs.  
Frequency  
Frequency  
Figure 48.  
Figure 49.  
14  
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Typical Performance Characteristics (continued)  
Unless otherwise noted, TA = 25°C  
Total Harmonic Distortion  
Undistorted Output Swing  
vs.  
vs.  
Frequency  
Frequency  
Figure 50.  
Figure 51.  
Undistorted Output Swing  
Undistorted Output Swing  
vs.  
vs.  
Frequency  
Frequency  
Figure 52.  
Figure 53.  
Undistorted Output Swing  
Total Power Dissipation  
vs.  
Ambient Temperature  
vs.  
Frequency  
Figure 54.  
Figure 55.  
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LM6171 SIMPLIFIED SCHEMATIC  
Figure 56.  
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APPLICATION INFORMATION  
LM6171 PERFORMANCE DISCUSSION  
The LM6171 is a high speed, unity-gain stable voltage feedback amplifier. It consumes only 2.5 mA supply  
current while providing a gain-bandwidth product of 100 MHz and a slew rate of 3600V/μs. It also has other great  
features such as low differential gain and phase and high output current. The LM6171 is a good choice in high  
speed circuits.  
The LM6171 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 impedance nodes. The low impedance inverting input in CFAs will couple with feedback capacitor and  
cause oscillation. As a result, CFAs cannot be used in traditional op amp circuits such as photodiode amplifiers,  
I-to-V converters and integrators.  
LM6171 CIRCUIT OPERATION  
The class AB input stage in LM6171 is fully symmetrical and has a similar slewing characteristic to the current  
feedback amplifiers. In LM6171 Figure 56, 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.  
LM6171 SLEW RATE CHARACTERISTIC  
The slew rate of LM6171 is determined by the current available to charge and discharge an internal high  
impedance node capacitor. The 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 configurations.  
When a very fast large signal pulse is applied to the input of an amplifier, some overshoot or undershoot occurs.  
By placing an external series resistor such as 1 kΩ to the input of LM6171, the bandwidth is reduced to help  
lower the overshoot.  
LAYOUT CONSIDERATION  
Printed Circuit Boards and High Speed Op Amps  
There are many things to consider when designing PC boards for high speed op amps. Without proper caution, it  
is very easy and frustrating 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 frequency performance. It is better to solder the amplifier directly into the PC board  
without using any socket.  
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.  
Components Selection And Feedback Resistor  
It is important in high speed applications to keep all component leads short because wires are inductive at high  
frequency. For discrete components, choose carbon composition-type resistors and mica-type capacitors.  
Surface mount components are preferred over discrete components for minimum inductive effect.  
Large values of feedback resistors can couple with parasitic capacitance and cause undesirable effects such as  
ringing or oscillation in high speed amplifiers. For LM6171, a feedback resistor of 510Ω gives optimal  
performance.  
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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  
CF > (RG × CIN)/RF  
(1)  
can be used to cancel that pole. For LM6171, a feedback capacitor of 2 pF is recommended. Figure 57 illustrates  
the compensation circuit.  
Figure 57. 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 individually by placing 0.01 μF ceramic capacitors  
directly to power supply pins and 2.2 μF tantalum capacitors close to the power supply pins.  
Figure 58. Power Supply Bypassing  
TERMINATION  
In high frequency applications, reflections occur if signals are not properly terminated. Figure 59 shows a  
properly terminated signal while Figure 60 shows an improperly terminated signal.  
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SNOS745C MAY 1998REVISED MARCH 2013  
Figure 59. Properly Terminated Signal  
Figure 60. Improperly Terminated Signal  
To minimize reflection, coaxial cable with matching characteristic 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.  
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DRIVING CAPACITIVE LOADS  
Amplifiers driving capacitive loads can oscillate or have ringing at the output. To eliminate oscillation or reduce  
ringing, an isolation resistor can be placed as shown below in Figure 61. The combination of the isolation resistor  
and the load capacitor forms a pole to increase stablility by adding more phase margin to the overall system. The  
desired performance depends on the value of the isolation resistor; the bigger the isolation resistor, the more  
damped the pulse response becomes. For LM6171, a 50Ω isolation resistor is recommended for initial  
evaluation. Figure 62 shows the LM6171 driving a 200 pF load with the 50Ω isolation resistor.  
Figure 61. Isolation Resistor Used to Drive Capacitive Load  
Figure 62. The LM6171 Driving a 200 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  
θJA is the thermal resistance of a particular package  
(2)  
For example, for the LM6171 in a SOIC-8 package, the maximum power dissipation at 25°C ambient  
temperature is 730 mW.  
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SNOS745C MAY 1998REVISED MARCH 2013  
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 PDIP package has a lower thermal  
resistance (108°C/W) than that of 8-pin SOIC-8 (172°C/W). Therefore, for higher dissipation capability, use an 8-  
pin PDIP package.  
The total power dissipated in a device can be calculated as:  
PD = PQ + PL  
(3)  
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.  
Furthermore,  
PQ = supply current × total supply voltage with no load  
PL = output current × (voltage difference between supply voltage and output voltage of the same supply)  
For example, the total power dissipated by the LM6171 with VS = ±15V and output voltage of 10V into 1 kΩ load  
resistor (one end tied to ground) is  
PD = PQ + PL  
= (2.5 mA) × (30V) + (10 mA) × (15V 10V)  
= 75 mW + 50 mW  
= 125 mW  
APPLICATION CIRCUITS  
Figure 63. Fast Instrumentation Amplifier  
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Figure 64. Multivibrator  
Figure 65. Pulse Width Modulator  
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LM6171  
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SNOS745C MAY 1998REVISED MARCH 2013  
REVISION HISTORY  
Changes from Revision B (March 2013) to Revision C  
Page  
Changed layout of National Data Sheet to TI format .......................................................................................................... 21  
Copyright © 1998–2013, Texas Instruments Incorporated  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
23-Feb-2023  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
LM6171AIM  
NRND  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
PDIP  
D
D
D
D
D
D
P
8
8
8
8
8
8
8
95  
Non-RoHS  
& Green  
Call TI  
Level-1-235C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-235C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-NA-UNLIM  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
LM61  
71AIM  
LM6171AIM/NOPB  
LM6171AIMX/NOPB  
LM6171BIM  
ACTIVE  
ACTIVE  
NRND  
95  
RoHS & Green  
SN  
SN  
LM61  
71AIM  
Samples  
Samples  
2500 RoHS & Green  
LM61  
71AIM  
95  
95  
Non-RoHS  
& Green  
Call TI  
SN  
LM61  
71BIM  
LM6171BIM/NOPB  
LM6171BIMX/NOPB  
LM6171BIN/NOPB  
ACTIVE  
ACTIVE  
ACTIVE  
RoHS & Green  
LM61  
71BIM  
Samples  
Samples  
Samples  
2500 RoHS & Green  
40 RoHS & Green  
SN  
LM61  
71BIM  
NIPDAU  
LM6171  
BIN  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance  
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may  
reference these types of products as "Pb-Free".  
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.  
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based  
flame retardants must also meet the <=1000ppm threshold requirement.  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
23-Feb-2023  
(6)  
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two  
lines if the finish value exceeds the maximum column width.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Aug-2022  
TAPE AND REEL INFORMATION  
REEL DIMENSIONS  
TAPE DIMENSIONS  
K0  
P1  
W
B0  
Reel  
Diameter  
Cavity  
A0  
A0 Dimension designed to accommodate the component width  
B0 Dimension designed to accommodate the component length  
K0 Dimension designed to accommodate the component thickness  
Overall width of the carrier tape  
W
P1 Pitch between successive cavity centers  
Reel Width (W1)  
QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE  
Sprocket Holes  
Q1 Q2  
Q3 Q4  
Q1 Q2  
Q3 Q4  
User Direction of Feed  
Pocket Quadrants  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LM6171AIMX/NOPB  
LM6171BIMX/NOPB  
SOIC  
SOIC  
D
D
8
8
2500  
2500  
330.0  
330.0  
12.4  
12.4  
6.5  
6.5  
5.4  
5.4  
2.0  
2.0  
8.0  
8.0  
12.0  
12.0  
Q1  
Q1  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Aug-2022  
TAPE AND REEL BOX DIMENSIONS  
Width (mm)  
H
W
L
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LM6171AIMX/NOPB  
LM6171BIMX/NOPB  
SOIC  
SOIC  
D
D
8
8
2500  
2500  
367.0  
367.0  
367.0  
367.0  
35.0  
35.0  
Pack Materials-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Aug-2022  
TUBE  
T - Tube  
height  
L - Tube length  
W - Tube  
width  
B - Alignment groove width  
*All dimensions are nominal  
Device  
Package Name Package Type  
Pins  
SPQ  
L (mm)  
W (mm)  
T (µm)  
B (mm)  
LM6171AIM  
LM6171AIM  
D
D
D
D
D
D
P
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
PDIP  
8
8
8
8
8
8
8
95  
95  
95  
95  
95  
95  
40  
495  
495  
495  
495  
495  
495  
502  
8
8
4064  
4064  
4064  
4064  
4064  
4064  
11938  
3.05  
3.05  
3.05  
3.05  
3.05  
3.05  
4.32  
LM6171AIM/NOPB  
LM6171BIM  
8
8
LM6171BIM  
8
LM6171BIM/NOPB  
LM6171BIN/NOPB  
8
14  
Pack Materials-Page 3  
PACKAGE OUTLINE  
D0008A  
SOIC - 1.75 mm max height  
SCALE 2.800  
SMALL OUTLINE INTEGRATED CIRCUIT  
C
SEATING PLANE  
.228-.244 TYP  
[5.80-6.19]  
.004 [0.1] C  
A
PIN 1 ID AREA  
6X .050  
[1.27]  
8
1
2X  
.189-.197  
[4.81-5.00]  
NOTE 3  
.150  
[3.81]  
4X (0 -15 )  
4
5
8X .012-.020  
[0.31-0.51]  
B
.150-.157  
[3.81-3.98]  
NOTE 4  
.069 MAX  
[1.75]  
.010 [0.25]  
C A B  
.005-.010 TYP  
[0.13-0.25]  
4X (0 -15 )  
SEE DETAIL A  
.010  
[0.25]  
.004-.010  
[0.11-0.25]  
0 - 8  
.016-.050  
[0.41-1.27]  
DETAIL A  
TYPICAL  
(.041)  
[1.04]  
4214825/C 02/2019  
NOTES:  
1. Linear dimensions are in inches [millimeters]. Dimensions in parenthesis are for reference only. Controlling dimensions are in inches.  
Dimensioning and tolerancing per ASME Y14.5M.  
2. This drawing is subject to change without notice.  
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not  
exceed .006 [0.15] per side.  
4. This dimension does not include interlead flash.  
5. Reference JEDEC registration MS-012, variation AA.  
www.ti.com  
EXAMPLE BOARD LAYOUT  
D0008A  
SOIC - 1.75 mm max height  
SMALL OUTLINE INTEGRATED CIRCUIT  
8X (.061 )  
[1.55]  
SYMM  
SEE  
DETAILS  
1
8
8X (.024)  
[0.6]  
SYMM  
(R.002 ) TYP  
[0.05]  
5
4
6X (.050 )  
[1.27]  
(.213)  
[5.4]  
LAND PATTERN EXAMPLE  
EXPOSED METAL SHOWN  
SCALE:8X  
SOLDER MASK  
OPENING  
SOLDER MASK  
OPENING  
METAL UNDER  
SOLDER MASK  
METAL  
EXPOSED  
METAL  
EXPOSED  
METAL  
.0028 MAX  
[0.07]  
.0028 MIN  
[0.07]  
ALL AROUND  
ALL AROUND  
SOLDER MASK  
DEFINED  
NON SOLDER MASK  
DEFINED  
SOLDER MASK DETAILS  
4214825/C 02/2019  
NOTES: (continued)  
6. Publication IPC-7351 may have alternate designs.  
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.  
www.ti.com  
EXAMPLE STENCIL DESIGN  
D0008A  
SOIC - 1.75 mm max height  
SMALL OUTLINE INTEGRATED CIRCUIT  
8X (.061 )  
[1.55]  
SYMM  
1
8
8X (.024)  
[0.6]  
SYMM  
(R.002 ) TYP  
[0.05]  
5
4
6X (.050 )  
[1.27]  
(.213)  
[5.4]  
SOLDER PASTE EXAMPLE  
BASED ON .005 INCH [0.125 MM] THICK STENCIL  
SCALE:8X  
4214825/C 02/2019  
NOTES: (continued)  
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate  
design recommendations.  
9. Board assembly site may have different recommendations for stencil design.  
www.ti.com  
IMPORTANT NOTICE AND DISCLAIMER  
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE  
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”  
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY  
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD  
PARTY INTELLECTUAL PROPERTY RIGHTS.  
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate  
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable  
standards, and any other safety, security, regulatory or other requirements.  
These resources are subject to change without notice. TI grants you permission to use these resources only for development of an  
application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license  
is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you  
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TI’s products are provided subject to TI’s Terms of Sale or other applicable terms available either on ti.com or provided in conjunction with  
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