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National Semiconductor LMH6550 Differential, High Speed Op Amp User's Guide

Summary

This high-performance voltage feedback differential amplifier is engineered for demanding signal processing tasks. Featuring exceptional capabilities such as 400 MHz bandwidth and a 3000 V/µs slew rate, the LMH6550 excels at driving high-speed ADCs and handling various video and data protocols. The comprehensive documentation guides engineers through its electrical characteristics, operating ratings, and connection details. It is ideal for applications requiring robust differential line drivers, IF/RF amplification, or specialized communication equipment like Video over twisted pair systems.

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查询LMH6550供应商

December

LM ifferential,H igh peed

LMH6550 Differential, High Speed Op Amp General Description Features

The LMH™6550 is high performance voltage feedback MHz −3 d B bandwidth (VOUT 0.5 VPP) differential amplifier. The LMH6550 has the high speed and MHz 0.1 d B bandwidth

low distortion necessary for driving high performance ADCs V/µs slew Rate as well as the current handling capability to drive signals

ns settling time to 0.1%

over balanced transmission lines like CAT data cables. The

−92/−103 d B HD2/HD3 MHz

LMH6550 can handle wide range of video and data for-

ns shutdown/enable

mats. With external gain set resistors, the LMH6550 can be used

Applications

at any desired gain. Gain flexibility coupled with high speed

Differential AD driver

makes the LMH6550 suitable for use as an IF amplifier in

high performance communications equipment. Video over twisted pair Differential line driver

The LMH6550 is available in the space saving SOIC pack-

age. Single end to differential converter High speed differential signaling IF/RF amplifier SAW filter buffer/driver

Typical Application

Single Ended Input Differential Output.

Gain AV=0.5 RF/RG

LMH™ is trademark of National Semiconductor Corporation.

National Semiconductor Corporation DS201301 www.national.com

Page Summary Contents For National Semiconductor LMH6550 Differential, High Speed Op Amp User's Guide

Page 1 查询LMH6550供应商 December LM ifferential,H igh peed LMH6550 Differential, High Speed Op Amp General Description Features The LMH™6550 is high performance voltage feedback MHz −3 d B bandwidth (VOUT 0.5 VP...
Page 2 Connection Diagram 8-Pin SOIC Ordering Information Package Part Number Package Marking Transport Media NSC Drawing LMH6550MA 95/Rails 8-Pin SOIC LMH6550MA M08A LMH6550MAX 2.5k Units Tape and Reel www....
Page 3 Absolute Maximum Ratings (Note 1) Soldering Information If Military/Aerospace specified devices are required, Infrared or Convection (20 sec) 235˚C please contact the National Semiconductor Sales Offi...
Page 4 ±5V Electrical Characteristics (Note 2) (Continued) Single ended in differential out, TA= 25˚C, AV= +1, VS ±5V, VCM 0V, RF RG 365Ω, RL 500Ω;; Unless specified Bold- face limits apply at the temperatur...
Page 5 5V Electrical Characteristics (Note 2) (Continued) LM Single ended in differential out, TA= 25˚C, AV= +1, VS 5V, VCM 2.5V, RF RG 365Ω, RL 500Ω; Unless specified Bold- face limits apply at the temperat...
Page 6 5V Electrical Characteristics (Note 2) (Continued) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the dev...
Page 7 Typical Performance Characteristics (TA 25˚C, VS ±5V, RL 500Ω, RF 365Ω, AV=+1; Unless LM Specified). Frequency Response vs. Supply Voltage Frequency Response Frequency Response vs. VOUT Frequency Resp...
Page 8 Typical Performance Characteristics (TA 25˚C, VS ±5V, RL 500Ω, RF 365Ω, AV=+1; Unless Specified). (Continued) VPP Pulse Response Single Ended Input VPP Pulse Response Single Ended Input Large Signal P...
Page 9 Typical Performance Characteristics (TA 25˚C, VS ±5V, RL 500Ω, RF 365Ω, AV=+1; Unless LM Specified). (Continued) Maximum VOUT vs. IOUT Minimum VOUT vs. IOUT Closed Loop Output Impedance Closed Loop Ou...
Page 10 Typical Performance Characteristics (TA 25˚C, VS ±5V, RL 500Ω, RF 365Ω, AV=+1; Unless Specified). (Continued) CMRR Balance Error www.national.com
Page 11 Application Section LM The LMH6550 is fully differential amplifier designed to The resistors RO help keep the amplifier stable when pre- provide low distortion amplification to wide bandwidth differ- ...
Page 12 Application Section (Continued) The LMH6550 requires supply bypassing capacitors as shown in Figure and Figure 5. The 0.01 µF and 0.1 µF capacitors should be leadless SMT ceramic capacitors and should...
Page 13 Application Section (Continued) LM SINGLE ENDED INPUT TO DIFFERENTIAL OUTPUT The LMH6550 provides excellent performance as an active balun transformer. Figure shows typical application where an LMH655...
Page 14 Application Section USING TRANSFORMERS (Continued) Transformers are useful for impedance transformation as well as for single to differential, and differential to single ended conversion. transformer ...
Page 15 Application Section shutdown is not provided. Therefore, it is of utmost impor- (Continued) tance to make sure that the TJMAX is never exceeded due to the overall power dissipation. Follow these steps...
Page 16 Application Section evaluation boards as guide for high frequency layout and (Continued) as an aid in device testing and characterization: EVALUATION BOARD Device Package Evaluation Board Generally, g...
Page 17 Physical Dimensions inches (millimeters) LM unless otherwise noted ifferential,H igh peed 8-Pin SOIC NS Package Number M08A National does not assume any responsibility for use of any circuitry describ...

Manual Details

Brand National
Pages 17
File Size 834.67 KB
Published June 17, 2026
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Frequently Asked Questions

What is the maximum operating temperature range?

The device operates within a temperature range of -40˚C to +85˚C.

How is the gain adjusted for this op-amp?

Gain can be set at any desired level using external gain set resistors.

What are the recommended specifications for wave soldering?

For wave soldering, the temperature limit is 260˚C applied for 10 seconds.

What are common applications for the LMH6550?

It is suitable for use as an IF amplifier, differential line driver, or in video over twisted pair equipment.