Datasheet

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LM6172

www.ti.com

SNOS792D –MAY 1999–REVISED MARCH 2013

LM6172 Dual High Speed, Low Power, Low Distortion, Voltage Feedback Amplifiers

Check for Samples: LM6172

FEATURES

DESCRIPTION

The LM6172 is a dual high speed voltage feedback

• (Typical Unless Otherwise Noted)

amplifier. It is unity-gain stable and provides excellent

• Easy to Use Voltage Feedback Topology

DC and AC performance. With 100MHz unity-gain

• High Slew Rate 3000V/μs

bandwidth, 3000V/μs slew rate and 50mA of output

current per channel, the LM6172 offers high

• Wide Unity-Gain Bandwidth 100MHz

performance in dual amplifiers; yet it only consumes

• Low Supply Current 2.3mA/Channel

2.3mA of supply current each channel.

• High Output Current 50mA/channel

The LM6172 operates on ±15V power supply for

• Specified for ±15V and ±5V Operation

systems requiring large voltage swings, such as

ADSL, scanners and ultrasound equipment. It is also

APPLICATIONS

specified at ±5V power supply for low voltage

applications such as portable video systems.

• Scanner I-to-V Converters

• ADSL/HDSL Drivers

The LM6172 is built with TI's advanced VIP III

(Vertically Integrated PNP) complementary bipolar

• Multimedia Broadcast Systems

process. See the LM6171 datasheet for a single

• Video Amplifiers

amplifier with these same features.

• NTSC, PAL and SECAM Systems

• ADC/DAC Buffers

• Pulse Amplifiers and Peak Detectors

LM6172 Driving Capacitive Load

Connection Diagram

Figure 1. Top View 8-Pin

See Package Numbers P (PDIP) and D (SOIC)

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.

2All 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 (25 pages)

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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 LM6172 Dual High Speed, Low Power, Low Distortion, Voltage Feedback Amplifiers Check for Samples: LM6172 FEATURES DESCRIPTION • • • • • • • The LM6172 is a dual high speed voltage feedback amplifier. It is unity-gain stable and provides excellent DC and AC performance. With 100MHz unity-gain bandwidth, 3000V/μs slew rate and 50mA of output current per channel, the LM6172 offers high performance in dual amplifiers; yet it only consumes 2.
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LM6172 SNOS792D – 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 (1) (2) ESD Tolerance (3) Human Body Model 3kV Machine Model 300V Supply Voltage (V+ − V−) 36V Differential Input Voltage ±10V V+ +0.3V to V− −0.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 ±15V DC Electrical Characteristics (continued) Unless otherwise specified, all limits guaranteed for TJ = 25°C,V+ = +15V, V− = −15V, VCM = 0V, and RL = 1kΩ.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com ±15V AC Electrical Characteristics Unless otherwise specified, TJ = 25°C, V+ = +15V, V− = −15V, VCM = 0V, and RL = 1kΩ Symbol Parameter Conditions LM6172I Typ Units AV = +2, VIN = 13 VPP 3000 V/μs AV = +2, VIN = 10 VPP 2500 V/μs (1) SR Slew Rate Unity-Gain Bandwidth −3 dB Frequency 100 MHz AV = +1 160 MHz AV = +2 62 MHz Bandwidth Matching between Channels 2 MHz φm Phase Margin 40 Deg ts Settling Time (0.
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LM6172 www.ti.com SNOS792D – MAY 1999 – 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.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com ±5V AC Electrical Characteristics Unless otherwise specified, TJ = 25°C, V+ = +5V, V− = −5V, VCM = 0V, and RL = 1 kΩ. Symbol Parameter Conditions LM61722 Typ Units (1) SR Slew Rate AV = +2, VIN = 3.5 VPP 750 V/μs 70 MHz AV = +1 130 MHz AV = +2 45 MHz 57 Deg 72 ns Unity-Gain Bandwidth −3 dB Frequency φm Phase Margin ts Settling Time (0.1%) AD Differential Gain (2) 0.4 % φD Differential Phase (2) 0.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics unless otherwise noted, TA = 25°C Supply Voltage vs. Supply Current Supply Current vs. Temperature Figure 2. Figure 3. Input Offset Voltage vs. Temperature Input Bias Current vs. Temperature Figure 4. Figure 5. Short Circuit Current vs. Temperature (Sourcing) Short Circuit Current vs. Temperature (Sinking) Figure 6. Figure 7.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA = 25°C 8 Output Voltage vs. Output Current (VS = ±15V) Output Voltage vs. Output Current (VS = ±5V) Figure 8. Figure 9. CMRR vs. Frequency PSRR vs. Frequency Figure 10. Figure 11. PSRR vs. Frequency Open-Loop Frequency Response Figure 12. Figure 13.
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LM6172 www.ti.com SNOS792D – 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 at Different Temperature Figure 14. Figure 15. Large Signal Voltage Gain vs. Load Large Signal Voltage Gain vs. Load Figure 16. Figure 17. Input Voltage Noise vs. Frequency Input Voltage Noise vs. Frequency Figure 18. Figure 19.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA = 25°C 10 Input Current Noise vs. Frequency Input Current Noise vs. Frequency Figure 20. Figure 21. Slew Rate vs. Supply Voltage Slew Rate vs. Input Voltage Figure 22. Figure 23. Large Signal Pulse Response AV = +1, VS = ±15V Small Signal Pulse Response AV = +1, VS = ±15V Figure 24. Figure 25.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA = 25°C Large Signal Pulse Response AV = +1, VS = ±5V Small Signal Pulse Response AV = +1, VS = ±5V Figure 26. Figure 27. Large Signal Pulse Response AV = +2, VS = ±15V Small Signal Pulse Response AV = +2, VS = ±15V Figure 28. Figure 29. Large Signal Pulse Response AV = +2, VS = ±5V Small Signal Pulse Response AV = +2, VS = ±5V Figure 30. Figure 31.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) unless otherwise noted, TA = 25°C 12 Large Signal Pulse Response AV = −1, VS = ±15V Small Signal Pulse Response AV = −1, VS = ±15V Figure 32. Figure 33. Large Signal Pulse Response AV = −1, VS = ±5V Small Signal Pulse Response AV = −1, VS = ±5V Figure 34. Figure 35. Closed Loop Frequency Response vs. Supply Voltage (AV = +1) Closed Loop Frequency Response vs.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) unless otherwise noted, TA = 25°C Harmonic Distortion vs. Frequency (VS = ±15V) Harmonic Distortion vs. Frequency (VS = ±5V) Figure 38. Figure 39. Crosstalk Rejection vs. Frequency Maximum Power Dissipation vs. Ambient Temperature Figure 40. Figure 41.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com LM6172 Simplified Schematic (Each Amplifier) Figure 42. APPLICATION NOTES LM6172 PERFORMANCE DISCUSSION The LM6172 is a dual high-speed, low power, voltage feedback amplifier. It is unity-gain stable and offers outstanding performance with only 2.3mA of supply current per channel.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 Another possible source of overshoot and undershoot comes from capacitive load at the output. Please see DRIVING CAPACITIVE LOADS for more detail. 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 in Figure 43.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com Figure 45. The LM6172 Driving a 220 pF Load with a 50Ω Isolation Resistor 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.
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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 Figure 46. 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 0.01μF ceramic capacitors directly to power supply pins and 2.2μF tantalum capacitors close to the power supply pins. Figure 47.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com Figure 48. Properly Terminated Signal Figure 49. 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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LM6172 www.ti.com SNOS792D – MAY 1999 – REVISED MARCH 2013 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 For example, for the LM6172 in a SOIC-8 package, the maximum power dissipation at 25°C ambient temperature is 780mW. Thermal resistance, θJA, depends on parameters such as die size, package size and package material.
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LM6172 SNOS792D – MAY 1999 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision C (March 2013) to Revision D • 20 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 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish 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.
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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 LM6172IMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM6172IMX/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 21-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM6172IMX SOIC D 8 2500 367.0 367.0 35.0 LM6172IMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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