LMH6555   
Low Distortion 1.2 GHz Differential Driver from the PowerWise® Family		 Click link to Download

Features

Typical values unless otherwise specified.

−3 dB bandwidth (VOUT = 0.80 VPP)

1.2 GHz

±0.5 dB gain flatness (VOUT = 0.80 VPP)

330 MHz

Slew rate

1300 V/μs

2 nd/3 rd Harmonics (750 MHz)

−53/−54 dBc

Fixed gain

13.7 dB

Supply current

120 mA

Single supply operation

3.3V ±10%

Adjustable common-mode output voltage

Description

The LMH6555 is an ultra high speed differential line driver with 53 dB SFDR at 750 MHz. The LMH6555 features a fixed gain of 13.7 dB. An input to the device allows the output common mode voltage to be set independent of the input common mode voltage in order to simplify the interface to high speed differential input ADCs. A unique architecture allows the device to operate as a fully differential driver or as a single-ended to differential converter.

The outstanding linearity and drive capability (100Ω differential load) of this device are a perfect match for driving high speed analog-to-digital converters. When combined with the ADC081000/ ADC081500 (single or dual ADC), the LMH6555 forms an excellent 8-bit data acquisition system with analog bandwidths exceeding 750 MHz.

The LMH6555 is offered in a space saving 16-pin LLP package.

Applications
•Differential ADC driver
•National Semiconductor ADC081500/ ADC081000
•(single or dual) driver
•Single ended to differential converter
•Intermediate frequency (IF) amplifier
•Communication receivers
•Oscilloscope front end
Also Recommended
LMH6550▲Lower Power, Lower BW (400 MHz)
LMH6551▲Lower Power, Lower BW Version (370 MHz)
LMH6552▲Lower Power, Adjustable Gain Version (1.5 GHz)



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Also Recommended
LMH6550▲Lower Power, Lower BW (400 MHz)
LMH6551▲Lower Power, Lower BW Version (370 MHz)
LMH6552▲Lower Power, Adjustable Gain Version (1.5 GHz)

Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLMH6555 LMH6550 LMH6551 LMH6552
Channels1 Channels 1 Channels 1 Channels 1 Channels
Input OutputTypeDiff In and Out Diff In and Out Diff In and Out Diff In and Out
Gain Bandwidth1200 MHz 400 MHz 370 MHz 1000 MHz
Slew Rate1300 Volts/usec 3000 Volts/usec 2400 Volts/usec 3800 Volts/usec
Supply Min3 Volt 5 Volt 3 Volt 4.5 Volt
Supply Max3.6 Volt 12 Volt 12 Volt 12 Volt
Offset Voltage max, 25C50 mV 5 mV 5 mV 16.5 mV
Supply Current Per Channel120 mA 20 mA 12.5 mA 19 mA
PowerWise Rating 2100 uA/MHz 50 uA/MHz 33.8 uA/MHz 12.7 uA/MHz
Voltage Noise3.9 nV/root(Hz) 6 nV/root(Hz) 6 nV/root(Hz) 1.1 nV/root(Hz)
Feedback TypeCurrent Voltage Voltage Current
Av+5 BW1200 MHz 80 MHz 74 MHz 800 MHz
Special FeaturesFixed 13.7 dB Gain, Adj VCM Differential in, Differential out Differential in, Differential out Differential in, Differential out
FunctionDriver Op Amp Op Amp Op Amp
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max85 deg C 85 deg C 85 deg C 85 deg C
PowerWiseYes Yes Yes Yes
Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LMH6555SQE/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide0
RS COMPONENTSWorldwide44
$5.70 each at 1K+ pcsreel
of
250
LMH6555SQ/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide1948
FARNELLEurope and Asia790
RS COMPONENTSWorldwide199
$5.70 each at 1K+ pcsreel
of
1000
LMH6555SQX/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$5.70 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LMH6555EVAL
LMH6555 Evaluation boardFull production


 
DistributorRegionQty
NATIONALWorldwide7
$50.00 each1

Thank you for your interest in National Semiconductor's 1.2 GHz Low Distortion Differential Driver, the LMH6555. The LMH6555 is specifically designed to work with National's Ultra High Speed Data Converters, such as the ADC08(D)1000/1020, ADC08(D)1500/1520, and the ADC08(B)3000 products. Together with these data converters, the LMH6555 delivers 50 dB SFDR @ 750 MHz, making it ideal for many of today's 8-bit data acquisition systems.

Contents:

  • 1 - Fully assembled Evaluation Board for the LMH6555
  • 1 - Evaluation Board Manual
  • 1 - LMH6555 Product Datasheet

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LMH6555SQE/NOPB
LLP163260RoHSN/ALMH6555.MOD
NS
UZXYTT
L6555SQ
LMH6555SQ/NOPB
LLP163260RoHSN/ALMH6555.MOD
NS
UZXYTT
L6555SQ
LMH6555SQX/NOPB
LLP163260RoHSN/ALMH6555.MOD
NS
UZXYTT
L6555SQ

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH6555SQBICMOS8B+01152007439005211083656
LMH6555SQEBICMOS8B+01152007439005211083656
LMH6555SQXBICMOS8B+01152007439005211083656

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.


[Information as of 20-Nov-2009]