Datasheet

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LM7171

www.ti.com

SNOS760B –MAY 1999–REVISED MARCH 2013

LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier

Check for Samples: LM7171

FEATURES

DESCRIPTION

The LM7171 is a high speed voltage feedback

• (Typical Unless Otherwise Noted)

amplifier that has the slewing characteristic of a

• Easy-to-Use Voltage Feedback Topology

current feedback amplifier; yet it can be used in all

• Very High Slew Rate: 4100 V/μs

traditional voltage feedback amplifier configurations.

The LM7171 is stable for gains as low as +2 or −1. It

• Wide Unity-Gain Bandwidth: 200 MHz

provides a very high slew rate at 4100V/μs and a

• −3 dB Frequency @ A

= +2: 220 MHz

wide unity-gain bandwidth of 200 MHz while

• Low Supply Current: 6.5 mA

consuming only 6.5 mA of supply current. It is ideal

for video and high speed signal processing

• High Open Loop Gain: 85 dB

applications such as HDSL and pulse amplifiers. With

• High Output Current: 100 mA

100 mA output current, the LM7171 can be used for

• Differential Gain and Phase: 0.01%, 0.02°

video distribution, as a transformer driver or as a

laser diode driver.

• Specified for ±15V and ±5V Operation

Operation on ±15V power supplies allows for large

APPLICATIONS

signal swings and provides greater dynamic range

and signal-to-noise ratio. The LM7171 offers low

• HDSL and ADSL Drivers

SFDR and THD, ideal for ADC/DAC systems. In

• Multimedia Broadcast Systems

addition, the LM7171 is specified for ±5V operation

• Professional Video Cameras

for portable applications.

• Video Amplifiers

The LM7171 is built on TI's advanced VIP™ III

• Copiers/Scanners/Fax

(Vertically integrated PNP) complementary bipolar

process.

• HDTV Amplifiers

• Pulse Amplifiers and Peak Detectors

• CATV/Fiber Optics Signal Processing

Typical Performance

Figure 1. Large Signal Pulse Response

= +2, V

= ±15V

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.

2VIP is a trademark of Texas Instruments.

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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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier Check for Samples: LM7171 FEATURES 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.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com 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. Absolute Maximum Ratings ESD Tolerance (1) (2) 2.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 ±15V DC Electrical Characteristics Unless otherwise noted, all limits are specified for TJ = 25°C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ. Boldface limits apply at the temperature extremes Symbol VOS Parameter Conditions Input Offset Voltage Typ (1) 0.2 TC VOS Input Offset Voltage Average Drift 35 IB Input Bias Current 2.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com ±15V AC Electrical Characteristics Unless otherwise noted, TJ = 25°C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1 kΩ. Symbol SR Parameter Slew Rate Conditions (3) AV = +2, VIN = 13 VPP 4100 AV = +2, VIN = 10 VPP 3100 Unity-Gain Bandwidth −3 dB Frequency Typ (1) AV = +2 LM7171AI Limit (2) LM7171BI Limit Units (2) V/μs 200 MHz 220 MHz 50 Deg φm Phase Margin ts Settling Time (0.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 ±5V DC Electrical Characteristics Unless otherwise noted, all limits are specified for TJ = 25°C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Boldface limits apply at the temperature extremes Symbol VOS Parameter Conditions Input Offset Voltage Typ (1) 0.3 TC VOS Input Offset Voltage Average Drift 35 IB Input Bias Current 3.3 IOS Input Offset Current RIN Input Resistance 0.1 Common Mode 40 Differential Mode 3.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com ±5V AC Electrical Characteristics Unless otherwise noted, all limits are specified for TJ = 25°C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Symbol SR Parameter Slew Rate (3) Conditions AV = +2, VIN = 3.5 VPP Unity-Gain Bandwidth −3 dB Frequency AV = +2 Typ (1) LM7171AI Limit (2) LM7171BI Limit Units (2) 950 V/μs 125 MHz 140 MHz φm Phase Margin 57 Deg ts Settling Time (0.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics unless otherwise noted, TA= 25°C Supply Current vs. Supply Voltage Supply Current vs. Temperature Figure 3. Figure 4. Input Offset Voltage vs. Temperature Input Bias Current vs. Temperature Figure 5. Figure 6. Short Circuit Current vs. Temperature (Sourcing) Short Circuit Current vs. Temperature (Sinking) Figure 7. Figure 8.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C 8 Output Voltage vs. Output Current Output Voltage vs. Output Current Figure 9. Figure 10. CMRR vs. Frequency PSRR vs. Frequency Figure 11. Figure 12. PSRR vs. Frequency Open Loop Frequency Response Figure 13. Figure 14.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C Open Loop Frequency Response Gain-Bandwidth Product vs. Supply Voltage Figure 15. Figure 16. Gain-Bandwidth Product vs. Load Capacitance Large Signal Voltage Gain vs. Load Figure 17. Figure 18. Large Signal Voltage Gain vs. Load Input Voltage Noise vs. Frequency Figure 19. Figure 20.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C 10 Input Voltage Noise vs. Frequency Input Current Noise vs. Frequency Figure 21. Figure 22. Input Current Noise vs. Frequency Slew Rate vs. Supply Voltage Figure 23. Figure 24. Slew Rate vs. Input Voltage Slew Rate vs. Load Capacitance Figure 25. Figure 26.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C Open Loop Output Impedance vs. Frequency Open Loop Output Impedance vs Frequency Figure 27. Figure 28. Large Signal Pulse Response AV = −1, VS = ±15V Large Signal Pulse Response AV = −1, VS = ±5V Figure 29. Figure 30. Large Signal Pulse Response AV = +2, VS = ±15V Large Signal Pulse Response AV = +2, VS = ±5V Figure 31. Figure 32.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C 12 Small Signal Pulse Response AV = −1, VS = ±15V Small Signal Pulse Response AV = −1, VS = ±5V Figure 33. Figure 34. Small Signal Pulse Response AV = +2, VS = ±15V Small Signal Pulse Response AV = +2, VS = ±5V Figure 35. Figure 36. Closed Loop Frequency Response vs. Supply Voltage (AV = +2) Closed Loop Frequency Response vs.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C Closed Loop Frequency Response vs. Capacitive Load (AV = +2) Closed Loop Frequency Response vs. Input Signal Level (AV = +2) Figure 39. Figure 40. Closed Loop Frequency Response vs. Input Signal Level (AV = +2) Closed Loop Frequency Response vs. Input Signal Level (AV = +2) Figure 41. Figure 42. Closed Loop Frequency Response vs.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C (1) 14 Closed Loop Frequency Response vs. Input Signal Level (AV = +4) Closed Loop Frequency Response vs. Input Signal Level (AV = +4) Figure 45. Figure 46. Closed Loop Frequency Response vs. Input Signal Level (AV = +4) Total Harmonic Distortion vs. Frequency (1) Figure 47. Figure 48. Total Harmonic Distortion vs. Frequency (1) Undistorted Output Swing vs.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA= 25°C Undistorted Output Swing vs. Frequency Undistorted Output Swing vs. Frequency Figure 51. Figure 52. Harmonic Distortion vs. Frequency (2) Harmonic Distortion vs. Frequency (2) Figure 53. Figure 54. Maximum Power Dissipation vs. Ambient Temperature Figure 55. (2) The THD measurement at low frequency is limited by the test instrument.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Note: M1 and M2 are current mirrors. Figure 56.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 APPLICATION NOTES 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. The LM7171 is a true voltage feedback amplifier.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com 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.
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LM7171 www.ti.com SNOS760B – MAY 1999 – 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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LM7171 SNOS760B – MAY 1999 – 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 stability by adding more phase margin to the overall system.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 For example, for the LM7171 in a SOIC-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 SOIC (172°C/W). Therefore, for higher dissipation capability, use an 8pin DIP package.
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LM7171 SNOS760B – MAY 1999 – REVISED MARCH 2013 www.ti.com Figure 64. Multivibrator Figure 65. Pulse Width Modulator Figure 66.
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LM7171 www.ti.com SNOS760B – MAY 1999 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision A (March 2013) to Revision B • 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 23-Sep-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 LM7171AIMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM7171AIMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM7171BIMX/NOPB 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 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM7171AIMX SOIC D 8 2500 367.0 367.0 35.0 LM7171AIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM7171BIMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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