Datasheet

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LM6171

www.ti.com

SNOS745C –MAY 1998–REVISED MARCH 2013

LM6171 High Speed Low Power Low Distortion Voltage Feedback Amplifier

Check for Samples: LM6171

FEATURES

DESCRIPTION

The LM6171 is a high speed unity-gain stable voltage

• (Typical Unless Otherwise Noted)

feedback amplifier. It offers a high slew rate of

• Easy-To-Use Voltage Feedback Topology

3600V/μs and a unity-gain bandwidth of 100 MHz

• Very High Slew Rate: 3600V/μs

while consuming only 2.5 mA of supply current. The

LM6171 has very impressive AC and DC

• Wide Unity-Gain-Bandwidth Product: 100 MHz

performance which is a great benefit for high speed

• −3dB Frequency @ A

= +2: 62 MHz

signal processing and video applications.

• Low Supply Current: 2.5 mA

The ±15V power supplies allow for large signal

• High CMRR: 110 dB

swings and give greater dynamic range and signal-to-

• High Open Loop Gain: 90 dB

noise ratio. The LM6171 has high output current

drive, low SFDR and THD, ideal for ADC/DAC

• Specified for ±15V and ±5V Operation

systems. The LM6171 is specified for ±5V operation

for portable applications.

APPLICATIONS

The LM6171 is built on TI's advanced VIP III

• Multimedia Broadcast Systems

(Vertically Integrated PNP) complementary bipolar

• Line Drivers, Switchers

process.

• 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.

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.

2PAL is a registered trademark of and used under lisence from Advanced Micro Devices, Inc..

3All 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.

Summary of content (30 pages)

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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 LM6171 High Speed Low Power Low Distortion Voltage Feedback Amplifier Check for Samples: LM6171 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.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com Absolute Maximum Ratings (1) (2) ESD Tolerance (3) 2.5 kV Supply Voltage (V+–V−) 36V Differential Input Voltage ±10V V++0.3V to V− −0.3V Common-Mode Voltage Range Input Current ±10mA Output Short Circuit to Ground (4) Continuous −65°C to +150°C Storage Temperature Range Maximum Junction Temperature (5) Soldering Information (1) (2) (3) (4) (5) 150°C Infrared or Convection Reflow (20 sec.) 235°C Wave Soldering Lead Temp (10 sec.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED 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 (1) LM6171AI Limit LM6171BI Limit 3 6 mV 5 8 max (2) VOS Input Offset Voltage 1.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com ±15V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED 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 (1) LM6171AI Limit LM6171BI Limit 3 6 mV 5 8 max (2) VOS Input Offset Voltage 1.
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LM6171 SNOS745C – MAY 1998 – REVISED 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 (1) LM6171AI Limit (2) (3) SR Slew Rate GBW Unity Gain-Bandwidth Product AV = +2, VIN = 3.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics Unless otherwise noted, TA = 25°C Supply Current vs. Supply Voltage Supply Current vs. Temperature Figure 2. Figure 3. Input Offset Voltage vs. Temperature Input Bias Current vs. 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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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C 8 Short Circuit Current vs. Temperature (Sinking) Output Voltage vs. Output Current 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.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 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. Supply Voltage Gain Bandwidth Product vs. Load Capacitance Figure 16. Figure 17. Large Signal Voltage Gain vs. Load Large Signal Voltage Gain vs. Load Figure 18. Figure 19.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C 10 Input Voltage Noise vs. Frequency Input Voltage Noise vs. Frequency Figure 20. Figure 21. Input Current Noise vs. Frequency Input Current Noise vs. Frequency Figure 22. Figure 23. Slew Rate vs. Supply Voltage Slew Rate vs. Input Voltage Figure 24. Figure 25.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C Slew Rate vs. Load Capacitance Open Loop Output Impedance vs. Frequency Figure 26. Figure 27. Open Loop Output Impedance vs. Frequency Large Signal Pulse Response AV = −1, VS = ±15V Figure 28. Figure 29. Large Signal Pulse Response AV = −1, VS = ±5V Large Signal Pulse Response AV = +1, VS = ±15V Figure 30. Figure 31.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C 12 Large Signal Pulse Response AV = +1, VS = ±5V Large Signal Pulse Response AV = +2, VS = ±15V 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 AV = −1, VS = ±5V Small Signal Pulse Response AV = +1, VS = ±15V Figure 36. Figure 37.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C Small Signal Pulse Response AV = +1, VS = ±5V Small Signal Pulse Response AV = +2, VS = ±15V Figure 38. Figure 39. Small Signal Pulse Response AV = +2, VS = ±5V Closed Loop Frequency Response vs. SupplyVoltage (AV = +1) Figure 40. Figure 41. Closed Loop Frequency Response vs. Supply Voltage (AV = +2) Closed Loop Frequency Response vs.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C 14 Closed Loop Frequency Response vs. Capacitive Load (AV = +1) Closed Loop Frequency Response vs. Capacitive Load (AV = +2) Figure 44. Figure 45. Closed Loop Frequency Response vs. Capacitive Load (AV = +2) Total Harmonic Distortion vs. Frequency Figure 46. Figure 47. Total Harmonic Distortion vs. Frequency Total Harmonic Distortion vs.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted, TA = 25°C Total Harmonic Distortion vs. Frequency Undistorted Output Swing vs. Frequency Figure 50. Figure 51. Undistorted Output Swing vs. Frequency Undistorted Output Swing vs. Frequency Figure 52. Figure 53. Undistorted Output Swing vs. Frequency Total Power Dissipation vs. Ambient Temperature Figure 54. Figure 55.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com LM6171 SIMPLIFIED SCHEMATIC Figure 56.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 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.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com 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.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED 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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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 www.ti.com 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.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED 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 8pin PDIP package.
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LM6171 SNOS745C – MAY 1998 – REVISED MARCH 2013 Figure 64. Multivibrator 22 www.ti.com Figure 65.
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LM6171 www.ti.com SNOS745C – MAY 1998 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision B (March 2013) to Revision C • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (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.
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PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM6171AIMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM6171AIMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM6171BIMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM6171AIMX SOIC D 8 2500 367.0 367.0 35.0 LM6171AIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM6171BIMX SOIC D 8 2500 367.0 367.0 35.0 LM6171BIMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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