Features 900 MHz −3 dB small signal bandwidth @ AV = 1 670 MHz −3 dB large signal bandwidth @ AV = 1 −79 dB THD @ 20 MHz −92 dB IMD3 @ fc = 20 MHz 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 Description The LMH6553 is a 900 MHz differential amplifier with an integrated adjustable output limiting clamp. The clamp increases 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 discrete 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 overdrive 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 bandwidth, distortion, and noise performance ideal for driving ADCs up to 14-bits. The LMH6553 could also be used for automotive, 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 differential 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 high speed amplifier family. Applications 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

Typical Application Circuit

Typical Application *click for larger image Typical Application Circuit
Typical Performance click for larger image Frequency Response vs Gain (Diff Input)

Parameters Values Channels 1 Channels Input OutputType Diff In and Out Gain Bandwidth 720 MHz Slew Rate 2300 Volts/usec Supply Min 4.5 Volt Supply Max 12 Volt Supply Current Per Channel 29.1 mA Output Current 120 mA Voltage Noise 1.2 nV/root(Hz) Shut down No Feedback Type Current Av+1 BW 720 MHz Av+2 BW 680 MHz HD 2nd -79 dB HD 3rd -90 dB Settling Time 6 ns Tsettling Conditions 1% Special Features Output Limiting Clamp Function Op Amp Temperature Min -40 deg C Temperature Max 125 deg C PowerWise Yes

Datasheets

Title		Size	Date	Other Language
	LMH6553 900 MHz Fully Differential Amplifier with Output Limiting Clamp	785 Kbytes	13-Oct-10

Application Notes

Title		Size	Date	Other Language
	AN-1834: Application Note 1834 8-Pin PSOP Differential Amplifier Evaluation Board	527 Kbytes	11-Jun-08
	AN-1851: Application Note 1851 LMH6553SDEVAl High Speed Differential Amplifier Evaluation Board	417 Kbytes	20-Jun-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH6553MR/NOPB RoHS Status	PSOP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 950 AVNET-EM Worldwide 49 DIGI-KEY Worldwide 101 FARNELL Europe and Asia 252 TAYLOR Americas 950	$3.35 each at 1K+ pcs	rail of 95
LMH6553MRE/NOPB RoHS Status	PSOP	Full production Lead Time: 16 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 250 DIGI-KEY Worldwide 0 FARNELL Europe and Asia 148 MOUSER Worldwide 250 TAYLOR Americas 250	$3.35 each at 1K+ pcs	reel of 250
LMH6553MRX/NOPB RoHS Status	PSOP	Full production Lead Time: 16 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$3.35 each at 1K+ pcs	reel of 2500
LMH6553SD/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0 FARNELL Europe and Asia 821	$3.35 each at 1K+ pcs	reel of 1000
LMH6553SDE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 115 DIGI-KEY Worldwide 501 TAYLOR Americas 250	$3.35 each at 1K+ pcs	reel of 250
LMH6553SDX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$3.35 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH6553.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH6553 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH6553SDEVAL	LMH6553SDEVAL High Speed Differential Amplifier Evaluation Board	Full production	Distributor Region Qty	CALL	N/A
General Description: The LMH6553SDEVAL evaluation board is designed to aid in the characterization of National Semiconductors LMH6553 fully differential amplifier with output limiting clamp in an 8-pin LLP package. The LMH6553 is part of the LMH® high speed amplifier family. Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization. Evaluation Board Contents: LMH6553SD Evaluation Board LMH6553 Datasheet LMH6553SDEVAL AN-1851

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH6553MR/NOPB	77.907	PSOP	8	3	260	Detail	Download	spice file	NSXYTT LMH65 53MR
LMH6553MRE/NOPB	77.907	PSOP	8	3	260	Detail	Download	spice file	NSXYTT LMH65 53MR
LMH6553MRX/NOPB	77.907	PSOP	8	3	260	Detail	Download	spice file	NSXYTT LMH65 53MR
LMH6553SD/NOPB	17.85	LLP	8	1	260	Detail	Download	spice file	XYTT 6553
LMH6553SDE/NOPB	17.85	LLP	8	1	260	Detail	Download	spice file	XYTT 6553
LMH6553SDX/NOPB	17.85	LLP	8	1	260	Detail	Download	spice file	XYTT 6553

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH6553.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH6553 is located at RoHS Status.

CAD Symbols and Models Download LMH6553 CAD Symbols

Models spice file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH6553MR	VIP 10	0	13411	0	0	1245000	3	353272149
LMH6553MRE	VIP 10	0	13411	0	0	1245000	3	353272149
LMH6553MRX	VIP 10	0	13411	0	0	1245000	3	353272149
LMH6553SD	VIP 10	0	13411	0	0	1245000	3	353272149
LMH6553SDE	VIP 10	0	13411	0	0	1245000	3	353272149
LMH6553SDX	VIP 10	0	13411	0	0	1245000	3	353272149

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH6553.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH6553 is located at RoHS Status.