LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier General Description The LM7171 is a high speed voltage feedback amplifier that has the slewing characteristic of a current feedback amplifier; 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 consuming 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. 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. The LM7171 is built on National’s advanced VIP™ III (Vertically integrated PNP) complementary bipolar process. n n n n n n n n n Easy-To-Use Voltage Feedback Topology Very High Slew Rate: 4100V/µs Wide Unity-Gain Bandwidth: 200 MHz −3 dB Frequency @ AV = +2: 220 MHz Low Supply Current: 6.5 mA High Open Loop Gain: 85 dB High Output Current: 100 mA Differential Gain and Phase: 0.01%, 0.02˚ Specified for ± 15V and ± 5V Operation Applications n n n n n n n n HDSL and ADSL Drivers Multimedia Broadcast Systems Professional Video Cameras Video Amplifiers Copiers/Scanners/Fax HDTV Amplifiers Pulse Amplifiers and Peak Detectors CATV/Fiber Optics Signal Processing Features (Typical Unless Otherwise Noted) Typical Performance Connection Diagrams Large Signal Pulse Response AV = +2, VS = ± 15V 8-Pin DIP/SO DS012385-2 Top View 16-Pin Wide Body SO DS012385-1 DS012385-3 Top View VIP™ is a trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS012385 www.national.com LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier May 1999 Ordering Information Package 8-Pin DIP 8-Pin CDIP 10-Pin Ceramic SOIC 8-Pin Small Outline 16-Pin Small Outline www.national.com Temperature Range Industrial Military −40˚C to +85˚C −55˚C to +125˚C LM7171AIN, LM7171BIN Transport Media NSC Drawing Rails N08E LM7171AMJ-QML LM7171AMJ-QMLV 5962-95536 Rails J08A LM7171AMWG-QML LM7171AMWG-QMLV 5962-95536 Trays WG10A LM7171AIM, LM7171BIM Rails M08A LM7171AIMX, LM7171BIMX Tape and Reel LM7171AIWM, LM7171BIWM Rails LM7171AWMX, LM7171BWMX Tape and Reel 2 M16B Absolute Maximum Ratings (Note 1) Maximum Junction Temperature (Note 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Supply Voltage (V+–V−) Differential Input Voltage (Note 11) Output Short Circuit to Ground (Note 3) Storage Temperature Range 150˚C Operating Ratings (Note 1) 2.5 kV 36V ± 10V Supply Voltage Junction Temperature Range LM7171AI, LM7171BI Thermal Resistance (θJA) N Package, 8-Pin Molded DIP M Package, 8-Pin Surface Mount M Package, 16-Pin Surface Mount Continuous −65˚C to +150˚C 5.5V ≤ VS ≤ 36V −40˚C ≤ TJ ≤ +85˚C 108˚C/W 172˚C/W 95˚C/W ± 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 VOS TC VOS Parameter Conditions Typ (Note 5) Input Offset Voltage 0.2 Input Offset Voltage LM7171AI LM7171BI Limit Limit (Note 6) (Note 6) 1 3 mV 4 7 max 35 Units µV/˚C Average Drift IB IOS RIN RO Input Bias Current 2.7 Input Offset Current Input Resistance 0.1 Common Mode 40 Differential Mode 3.3 Open Loop Output 10 10 µA 12 12 max 4 4 µA 6 6 max MΩ Ω 15 Resistance CMRR Common Mode VCM = ± 10V 105 Rejection Ratio PSRR Power Supply VS = ± 15V to ± 5V 90 Rejection Ratio VCM Input Common-Mode CMRR > 60 dB 85 75 dB 80 70 min 85 75 dB 80 70 min ± 13.35 V Voltage Range AV Large Signal Voltage RL = 1 kΩ 85 Gain (Note 7) RL = 100Ω VO Output Swing 81 RL = 1 kΩ 13.3 −13.2 RL = 100Ω 11.8 −10.5 Output Current Sourcing, RL = 100Ω 118 (Open Loop) (Note 8) Sinking, RL = 100Ω 3 105 80 75 dB 75 70 min 75 70 dB 70 66 min 13 13 V 12.7 12.7 min −13 −13 V −12.7 −12.7 max 10.5 10.5 V 9.5 9.5 min −9.5 −9.5 V −9 −9 max 105 105 mA 95 95 min 95 95 mA 90 90 max www.national.com ± 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 IS Typ (Note 5) (in Linear Region) Sourcing, RL = 100Ω Sinking, RL = 100Ω 100 Output Short Circuit Sourcing 140 Current Sinking 135 Output Current ISC Conditions Supply Current LM7171AI LM7171BI Limit Limit (Note 6) (Note 6) 100 Units mA mA 6.5 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. Symbol SR Parameter Slew Rate (Note 9) Conditions AV = +2, VIN = 13 VPP AV = +2, VIN = 10 VPP Typ LM7171AI (Note 5) Limit Limit (Note 6) (Note 6) 4100 φm Phase Margin ts Settling Time (0.1%) tp Propagation Delay Units V/µs 3100 Unity-Gain Bandwidth −3 dB Frequency LM7171BI AV = +2 200 MHz 220 MHz 50 Deg 42 ns 5 ns AV = −1, VO = ± 5V RL = 500Ω AV = −2, VIN = ± 5V, RL = 500Ω AD Differential Gain (Note 10) 0.01 % φD Differential Phase (Note 10) 0.02 Deg −110 dBc −75 dBc Third Harmonic (Note 12) fIN = 10 kHz fIN = 5 MHz fIN = 10 kHz −115 dBc −55 dBc Input-Referred fIN = 5 MHz f = 10 kHz f = 10 kHz 1.5 Second Harmonic (Note 12) en 14 Voltage Noise in Input-Referred Current Noise ± 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 VOS TC VOS Parameter Conditions Input Offset Voltage Typ LM7171AI (Note 5) Limit Limit (Note 6) (Note 6) 1.5 3.5 mV 4 7 max 0.3 Input Offset Voltage LM7171BI 35 Units µV/˚C Average Drift IB IOS www.national.com Input Bias Current 3.3 Input Offset Current 0.1 4 10 10 µA 12 12 max 4 4 µA ± 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 Symbol RIN Parameter Input Resistance RO Output Resistance CMRR Common Mode PSRR Power Supply Conditions Typ LM7171AI (Note 5) Limit Limit (Note 6) (Note 6) 6 6 Common Mode 40 Differential Mode 3.3 VCM = ± 2.5V 104 80 VS = ± 15V to ± 5V 90 80 CMRR > 60 dB max Ω 15 Rejection Ratio Input Common-Mode Units MΩ Rejection Ratio VCM LM7171BI 70 dB 75 65 min 85 75 dB 70 min ± 3.2 V Voltage Range AV Large Signal Voltage RL = 1 kΩ 78 Gain (Note 7) RL = 100Ω VO Output Swing 76 RL = 1 kΩ 3.4 −3.4 RL = 100Ω 3.1 −3.0 Output Current Sourcing, RL = 100Ω 31 (Open Loop) (Note 8) Sinking, RL = 100Ω ISC IS 30 Output Short Circuit Sourcing 135 Current Sinking 100 Supply Current 75 70 dB 70 65 min 72 68 dB 67 63 min 3.2 3.2 V 3 3 min −3.2 −3.2 V −3 −3 max 2.9 2.9 V 2.8 2.8 min −2.9 −2.9 V −2.8 −2.8 max 29 29 mA 28 28 min 29 29 mA 28 28 max mA 6.2 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. Symbol SR Parameter Slew Rate (Note 9) Conditions AV = +2, VIN = 3.5 VPP Unity-Gain Bandwidth −3 dB Frequency φm Phase Margin ts Settling Time (0.1%) tp Propagation Delay AV = +2 AV = −1, VO = ± 1V, RL = 500Ω AV = −2, VIN = ± 1V, Typ LM7171AI (Note 5) Limit LM7171BI Limit (Note 6) (Note 6) Units 950 V/µs 125 MHz 140 MHz 57 Deg 56 ns 6 ns 0.02 % RL = 500Ω AD Differential Gain (Note 1) 5 www.national.com ± 5V AC Electrical Characteristics (Continued) Unless otherwise specified, TJ = 25˚C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Symbol φD Parameter Differential Phase (Note 10) Typ LM7171AI (Note 5) Limit LM7171BI Limit (Note 6) (Note 6) Units 0.03 Deg −102 dBc −70 dBc Third Harmonic (Note 12) fIN = 10 kHz fIN = 5 MHz fIN = 10 kHz −110 dBc −51 dBc Input-Referred fIN = 5 MHz f = 10 kHz f = 10 kHz 1.8 Second Harmonic (Note 12) en Conditions 14 Voltage Noise in Input-Referred Current Noise 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 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. Note 5: Typifcal 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 VS = ± 15V, VOUT = ± 5V. For VS = ± 5V, VOUT = ± 1V. 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 AV = +2, VIN = 1 VPP at 3.58 MHz and both input and output 75Ω terminated. Note 11: Input differential voltage is applied at VS = ± 15V. Note 12: Harmonics are measured with VIN = 1 VPP, AV = +2 and RL = 100Ω. Typical Performance Characteristics Supply Current vs Supply Voltage unless otherwise noted, TA= 25˚C Supply Current vs Temperature Input Offset Voltage vs Temperature DS012385-63 www.national.com DS012385-64 6 DS012385-65 Typical Performance Characteristics Input Bias Current vs Temperature unless otherwise noted, TA= 25˚C (Continued) Short Circuit Current vs Temperature (Sourcing) DS012385-66 Output Voltage vs Output Current Short Circuit Current vs Temperature (Sinking) DS012385-67 Output Voltage vs Output Current DS012385-68 CMRR vs Frequency DS012385-71 DS012385-69 DS012385-70 PSRR vs Frequency PSRR vs Frequency DS012385-72 Open Loop Frequency Response DS012385-73 Open Loop Frequency Response DS012385-51 Gain-Bandwidth Product vs Supply Voltage DS012385-52 7 DS012385-53 www.national.com Typical Performance Characteristics Gain-Bandwidth Product vs Load Capacitance unless otherwise noted, TA= 25˚C (Continued) Large Signal Voltage Gain vs Load DS012385-55 DS012385-54 Input Voltage Noise vs Frequency Input Voltage Noise vs Frequency DS012385-57 Input Current Noise vs Frequency DS012385-56 Input Current Noise vs Frequency DS012385-58 Slew Rate vs Supply Voltage 8 DS012385-59 Slew Rate vs Input Voltage DS012385-61 DS012385-60 www.national.com Large Signal Voltage Gain vs Load DS012385-62 Typical Performance Characteristics Slew Rate vs Load Capacitance unless otherwise noted, TA= 25˚C (Continued) Open Loop Output Impedance vs Frequency DS012385-23 Large Signal Pulse Response AV = −1, VS = ± 15V Open Loop Output Impedance vs Frequency DS012385-25 Large Signal Pulse Response AV = −1, VS = ± 5V DS012385-27 Large Signal Pulse Response AV = +2, VS = ± 5V DS012385-26 Large Signal Pulse Response AV = +2, VS = ± 15V DS012385-28 Small Signal Pulse Response AV = −1, VS = ± 15V DS012385-30 Small Signal Pulse Response AV = −1, VS = ± 5V DS012385-31 9 DS012385-29 DS012385-32 www.national.com Typical Performance Characteristics Small Signal Pulse Response AV = +2, VS = ± 15V unless otherwise noted, TA= 25˚C (Continued) Small Signal Pulse Response AV = +2, VS = ± 5V DS012385-33 Closed Loop Frequency Response vs Supply Voltage (AV = +2) DS012385-34 DS012385-35 Closed Loop Frequency Response vs Capacitive Load (AV = +2) Closed Loop Frequency Response vs Capacitive Load (AV = +2) DS012385-36 Closed Loop Frequency Response vs Input Signal Level (AV = +2) DS012385-37 Closed Loop Frequency Response vs Input Signal Level (AV = +2) DS012385-43 www.national.com Closed Loop Frequency Response vs Input Signal Level (AV = +2) Closed Loop Frequency Response vs Input Signal Level (AV = +2) DS012385-39 10 DS012385-38 DS012385-40 Typical Performance Characteristics Closed Loop Frequency Response vs Input Signal Level (AV = +4) unless otherwise noted, TA= 25˚C (Continued) Closed Loop Frequency Response vs Input Signal Level (AV = +4) DS012385-44 Closed Loop Frequency Response vs Input Signal Level (AV = +4) Closed Loop Frequency Response vs Input Signal Level (AV = +4) DS012385-45 Total Harmonic Distortion vs Frequency (Note 13) DS012385-41 Total Harmonic Distortion vs Frequency (Note 13) DS012385-46 DS012385-47 DS012385-42 Undistorted Output Swing vs Frequency Undistorted Output Swing vs Frequency Undistorted Output Swing vs Frequency DS012385-48 DS012385-49 11 DS012385-50 www.national.com Typical Performance Characteristics Harmonic Distortion vs Frequency unless otherwise noted, TA= 25˚C (Continued) Harmonic Distortion vs Frequency DS012385-74 Maximum Power Dissipation vs Ambient Temperature DS012385-75 DS012385-20 Note 13: The THD measurement at low frequency is limited by the test instrument. Simplified Schematic Diagram DS012385-9 Note: M1 and M2 are current mirrors. 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. Application Notes LM7171 Performance Discussion The LM7171 is a very high speed, voltage feedback amplifier. 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. LM7171 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 buff- 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 impedance nodes. The low impedance inverting input in www.national.com 12 LM7171 Circuit Operation COMPONENT SELECTION AND FEEDBACK RESISTOR It is important in high speed applications to keep all component leads short. For discrete components, choose carbon composition-type resistors and mica-type capacitors. Surface mount components are preferred over discrete components for minimum inductive effect. (Continued) ers the inverting input. The triple-buffered output stage isolates the gain stage from the load to provide low output impedance. LM7171 Slew Rate Characteristic 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 feedback resistor of 510Ω gives optimal performance. The slew rate of LM7171 is determined by the current available 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 configurations. A curve of slew rate versus input voltage level is provided in the “Typical Performance Characteristics”. When a very fast large signal pulse is applied to the input of an amplifier, some overshoot or undershoot occurs. By placing an external resistor such as 1 kΩ in series with the input of LM7171, the bandwidth is reduced to help lower the overshoot. 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 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 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. DS012385-10 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 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. 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 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. 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. DS012385-11 FIGURE 2. Power Supply Bypassing Termination In high frequency applications, reflections occur if signals are not properly terminated. Figure 3 shows a properly terminated signal while Figure 4 shows an improperly terminated signal. 13 www.national.com Termination (Continued) DS012385-12 FIGURE 5. Isolation Resistor Used to Drive Capacitive Load DS012385-17 FIGURE 3. Properly Terminated Signal DS012385-13 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 is the maximum junction temperature TJ(max) is the ambient temperature TA is the thermal resistance of a particular package θJA For example, for the LM7171 in a SO-8 package, the maximum power dissipation at 25˚C ambient temperature is 730 mW. 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 DS012385-18 FIGURE 4. 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. 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 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 performance 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. 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 x total supply voltage with no load PL: = output current x (voltage difference between supply voltage and output voltage of the same side of supply voltage) www.national.com 14 Power Dissipation Application Circuit (Continued) For example, the total power dissipated by the LM7171 with VS = ± 15V and output voltage of 10V into 1 kΩ is PD = PQ + PL = (6.5 mA) x (30V) + (10 mA) x (15V − 10V) = 195 mW + 50 mW Fast Instrumentation Amplifier = 245 mW DS012385-14 DS012385-80 Multivibrator DS012385-81 DS012385-15 Pulse Width Modulator DS012385-16 15 www.national.com Application Circuit (Continued) Video Line Driver DS012385-21 www.national.com 16 Design Kit Pitch Pack A design kit is available for the LM7171. The design kit contains: A pitch pack is available for the LM7171. The pitch pack contains: • • • • • • • High Speed Evaluation Board LM7171 in 8-pin DIP Package LM7171 Datasheet Pspice Macromodel DIskette With The LM7171 Macromodel LM7171 in 8-pin DIP Package LM7171 Datasheet Pspice Macromodel DIskette With The LM7171 Macromodel • Amplifier Selection Guide Contact your local National Semiconductor sales office to obtain a pitch pack and design kit. • Amplifier Selection Guide 17 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM7171AIM, LM7171BIM, LM7171AIMX or LM7171BIMX 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC NS Package Number M08A www.national.com 18 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM7171AIWM, LM7171BIWM, LM7171AIWMX or LM7171BIWMX 16-Lead (0.300" Wide) Molded Small Outline Package, JEDEC NS Package Number M16B Order Number LM7171AIN or LM7171BIN 8-Lead (0.300" Wide) Molded Dual-In-Line Package, JEDEC NS Package Number N08E 19 www.national.com LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number 5962-9553601QPA 8-Lead Dual-In-Line Package NS Package Number J08A NSID is LM7171AMJ/883 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. 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