LMH6553SD National Semiconductor, LMH6553SD Datasheet

DIFF AMP, 900MHZ, 8LLP, POWERWISE

LMH6553SD

Manufacturer Part Number
LMH6553SD
Description
DIFF AMP, 900MHZ, 8LLP, POWERWISE
Manufacturer
National Semiconductor
Datasheet

Specifications of LMH6553SD

No. Of Amplifiers
1
Gain Db Max
1dB
Bandwidth
900MHz
Slew Rate
2300V/µs
Supply Voltage Range
4.5V To 12V
Supply Current
29.1mA
Amplifier Case Style
LLP
No. Of Pins
8
Rohs Compliant
Yes
© 2008 National Semiconductor Corporation
LMH6553
900 MHz Fully Differential Amplifier With Output Limiting
Clamp
General Description
The LMH6553 is a 900 MHz differential amplifier with an in-
tegrated adjustable output limiting clamp. The clamp increas-
es system performance and provides transient over-voltage
protection to following stages. The internal clamp feature of
the LMH6553 reduces or eliminates the need for external dis-
crete overload protection networks. When used to drive
ADCs, the amplifier's output clamp allows low voltage ADC
inputs to be protected from being overdriven and damaged by
large input signals appearing at the system input. Fast over-
drive recovery of 600 ps ensures the amplifier output rapidly
recovers from a clamping event and quickly resumes to follow
the input signal. The LMH6553 delivers exceptional band-
width, distortion, and noise performance ideal for driving
ADCs up to 14-bits. The LMH6553 could also be used for au-
tomotive, communication, medical, test and measurement,
video, and LIDAR applications.
With external gain set resistors and integrated common mode
feedback, the LMH6553 can be configured as either a differ-
ential input to differential output or single ended input to
differential output gain block. The LMH6553 can be AC or DC
coupled at the input which makes it suitable for a wide range
of applications including communication systems and high
speed oscilloscope front ends. The LMH6553 is available in
8-pin PSOP and 8-pin LLP packages, and is part of our
LMH
Typical Application
LMH
®
is a registered trademark of National Semiconductor Corporation.
®
high speed amplifier family.
Single-Ended Input Differential Output ADC Driver
300437
Features
Applications
900 MHz −3 dB small signal bandwidth @ A
670 MHz −3 dB large signal bandwidth @ A
−79 dB THD @ 20 MHz
−92 dB IMD3 @ f
10 ns settling time to 0.1%
600 ps clamp overdrive recovery time
40 mV clamp accuracy with 100% Overdrive
−0.1 mV/°C clamp temperature drift
4.5 to 12 supply voltage operation
Differential ADC driver
Video over twisted pair
Differential line driver
Single end to differential converter
High speed differential signaling
IF/RF amplifier
SAW filter buffer/driver
CCD Output Limiting Amplifier
Automotive Safety Applications
c
= 20 MHz
30043769
October 23, 2008
www.national.com
V
V
= 1
= 1

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LMH6553SD Summary of contents

Page 1

... PSOP and 8-pin LLP packages, and is part of our LMH ® high speed amplifier family. Typical Application LMH ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Features ■ 900 MHz −3 dB small signal bandwidth @ A ■ 670 MHz −3 dB large signal bandwidth @ A ■ ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 5) Human Body Model Machine Model Supply Voltage Common Mode Input Voltage Maximum Input Current (pins Maximum Output Current (pins 4, 5) ...

Page 3

Symbol Parameter Input Characteristics I Input Bias Current (Note 11 Input Bias Current Differential Boffset (Note 7) CMRR Common Mode Rejection Ratio (Note 7) R Input Resistance IN C Input Capacitance IN CMVR Input Common Mode Voltage Range ...

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Symbol Parameter Input Bias Current Voltage Range CMRR Input Resistance Gain Miscellaneous Performance Z Open Loop Transimpedance T PSRR Power Supply Rejection Ratio I Supply Current ±2.5V Electrical Characteristics S Unless otherwise specified, all limits are guaranteed ...

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Symbol Parameter Noise Figure (See Figure 5) Input Characteristics I Input Bias Current (Note 11 Input Bias Current Differential Boffset (Note 7) CMRR Common Mode Rejection Ratio (Note 7) R Input Resistance IN C Input Capacitance IN CMVR ...

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Symbol Parameter Input Bias Current Voltage Range CMRR Input Resistance Gain Miscellaneous Performance Z Open Loop Transimpedance T PSRR Power Supply Rejection Ratio I Supply Current S Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device ...

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... Connection Diagrams Ordering Information Package Part Number LMH6553MR 8-Pin PSOP LMH6553MRE LMH6553MRX LMH6553SD 8-Pin LLP LMH6553SDE LMH6553SDX 8-Pin PSOP 30043708 Top View 8-Pin LLP 30043771 Top View Package Marking Transport Media 95 Units/Rails LMH6553MR 250 Units Tape and Reel 2.5k Units Tape and Reel ...

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Typical Performance Characteristics V for single ended in, differential out, unless specified). Frequency Response vs. Gain Frequency Response vs. V Frequency Response vs. Supply Voltage with R www.national.com = ± 25° Frequency Response vs. Gain ...

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Frequency Response vs. Capacitive Load Frequency Response vs. Resistive Load Frequency Response vs Suggested R 30043721 Frequency Response vs. Resistive Load 30043759 1 V Pulse Response Single-Ended Input PP 30043761 9 vs. Capacitive Load O 30043722 30043760 30043726 ...

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V Pulse Response Single-Ended Input PP Pulse Response with 0% and 100% Overdrive Overdrive Recovery with V www.national.com 4 V Pulse Response Single-Ended Input PP 30043727 Pulse Response with 0% and 100% Overdrive 30043774 = ±5V Overdrive Recovery with ...

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Output Common Mode Pulse Response Distortion vs. Supply Voltage Distortion vs. Output Common Mode Voltage Distortion vs. Frequency Single-Ended Input 30043724 Distortion vs. Supply Voltage 30043743 Distortion vs. Output Common Mode Voltage 30043738 11 30043729 30043737 30043767 www.national.com ...

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Maximum V OUT Closed Loop Output Impedance Open Loop Transimpedance www.national.com vs. I OUT 30043730 30043717 30043741 12 Minimum V vs. I OUT OUT 30043731 Closed Loop Output Impedance 30043718 Open Loop Transimpedance 30043742 ...

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PSRR 30043719 CMRR 30043733 Noise Figure 30043745 13 PSRR 30043720 Balance Error 30043713 Noise Figure 30043746 www.national.com ...

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Differential S-Parameter Magnitude vs. Frequency 3rd Order Intermodulation Products vs. V 3rd Order Intermodulation Products vs. Center Frequency www.national.com Differential S-Parameter Phase vs. Frequency 30043755 3rd Order Intermodulation Products vs. V OUT 30043751 3rd Order Intermodulation Products vs. Center Frequency ...

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Order Intermodulation Products vs. Center Frequency 3rd Order Intermodulation Products vs. V 3rd Order Intermodulation Products vs. Center Frequency 30043778 CLAMP 30043780 15 30043779 www.national.com ...

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Application Information The LMH6553, a fully differential current feedback amplifier with integrated output common mode control and output lim- iting clamp, is designed to provide protection of following input stages. The common mode feedback circuit sets the output common mode ...

Page 17

FIGURE 3. Single-Ended Input with Differential Output When using the LMH6553 in single-to-differential mode, the complementary output is forced to a phase inverted replica of the driven output by the common mode feedback circuit as opposed to being driven by ...

Page 18

SPLIT SUPPLY OPERATION For optimum performance, split supply operation is recom- mended using +5V and −5V supplies; however, operation is possible on split supplies as low as +2.25V and −2.25V and as high as +6V and −6V. Provided the total ...

Page 19

OUTPUT NOISE PERFORMANCE AND MEASUREMENT Unlike differential amplifiers based on voltage feedback ar- chitectures, noise sources internal to the LMH6553 refer to the inputs largely as current sources, hence the low input re- ferred voltage noise and relatively higher input ...

Page 20

High Speed Differential Amplifiers to Drive ADCs. For more information regarding a particular ADC, refer to the particular ADC datasheet for details. TABLE 3. DIFFERENTIAL INPUT ADCs COMPATIBLE WITH LMH6553 DRIVER Product Number Max Resolution Sampling Rate (MSPS) ADC1173 15 ...

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... National Semiconductor AMP )/ θ , where T = Ambient temperature AMB JA AMB = Thermal resistance, from junction to ambient 58°C/ not mid-rail, then there will be quiescent cur- CM and R for best performance at high F G Package Evaluation Board Ordering ID PSOP 55160019 LLP LMH6553SDEVAL www.national.com . ...

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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8-Pin PSOP NS Package Number MRA08A 8-Pin LLP NS Package Number SDA08C 22 ...

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Notes 23 www.national.com ...

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