LMH6646   
2.7V, 650µA, 55MHz Rail-to-Rail Input and Output Amplifiers with Shutdown Option from the PowerWise® Family		 Click link to Download

Features

(VS = 2.7V, TA = 25°C, RL = 1k to V+/2, AV = +1. Typical values unless specified).

-3dB BW

55MHz

Supply voltage range

2.5V to 12V

Slew rate

22V/µs

Supply current

650µA/channel

Output short circuit current

42mA

Linear output current

±20mA

Input common mode voltage

0.3V beyond rails

Output voltage swing

20mV from rails 

Input voltage noise

17nV/

Input current noise

0.75pA/

Description

The LMH™6645 (single) and LMH6646 (dual), rail-to-rail input and output voltage feedback amplifiers, offer high speed (55MHz), and low voltage operation (2.7V) in addition to micro-power shutdown capability (LMH6647, single).

Input common mode voltage range exceeds either supply by 0.3V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650µA/amplifier, output current capability is kept at a respectable ±20mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture.

In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT23, MSOP-8, and SO-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium.

Applications
•Active filters
•High speed portable devices
•Multiplexing applications (LMH6647)
•Current sense buffer
•High speed transducer amp
LMH6646 Webench® Custom
Design/Analyze/Build It
Select Topology
Active Filter Designer
Inverting Amplifier
AC-Coupled Inverting Amp
NonInverting Amp
Integrator
Lowpass Filter
Lowpass Filter 4th Order
Highpass Filter
Required Parameters
Supply voltage:
If "Other", Positive Supply is: V
If "Other", Negative Supply is: V
NOTE: 2.5 V <= Total Supply Voltage <= 12 V

What is Webench?

Also Recommended
LMH6619▲Dual With Higher 130MHz Bandwidth Plus Rail To Rail Input And Output
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Also Recommended
LMH6619▲Dual With Higher 130MHz Bandwidth Plus Rail To Rail Input And Output

Connection Diagram
*click for larger image



Typical Performance
click for larger image


Paramaters / ValuesLMH6646 LMH6619
-3dB BW55 MHz 140 MHz
AvCL for -3dB BW1 V/V 1 V/V
Slew Rate22 Volts/usec 57 Volts/usec
Input OutputTypeR-R In and Out R-R In and Out
Supply Min2.5 Volt 2.7 Volt
Supply Max12 Volt 11 Volt
Supply Current Per Channel0.725 mA 1.45 mA
PowerWise Rating 213.2 uA/MHz 10.4 uA/MHz
Channels2 Channels 2 Channels
Offset Voltage max, 25C3 mV 0.6 mV
Max Input Bias Current4000 nA 2400 nA
Output Current20 mA 35 mA
Voltage Noise17 nV/root(Hz) 10 nV/root(Hz)
Shut downNo No
Feedback TypeVoltage Voltage
Av+1 BW55 MHz 140 MHz
Av+2 BW27.5 MHz 70 MHz
Av+5 BW11 MHz 28 MHz
Av+10 BW5.5 MHz 14 MHz
Av+20 BW2.75 MHz 7 MHz
HD 2nd-62 dB -75 dB
HD 3rd-72 dB -75 dB
Settling Time125 ns 90 ns
Tsettling Conditionsto 0.1% to 0.1%
FunctionOp Amp Op Amp
Gain Bandwidth55 MHz 140 MHz
Temperature Min-40 deg C -40 deg C
Temperature Max85 deg C 125 deg C
PowerWiseYes Yes
Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LMH6646MA/NOPB
LMH6646MA

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide254
DIGIKEYWorldwide1832
FARNELLEurope and Asia333
FUTUREWorldwide1100
NEWARKAmericas344
RS COMPONENTSWorldwide50
$1.05 each at 1K+ pcsrail
of
95
LMH6646MAX/NOPB
LMH6646MAX

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.05 each at 1K+ pcsreel
of
2500
LMH6646MM/NOPB
LMH6646MM

RoHS Status



MINI SOIC		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide6870
FARNELLEurope and Asia824
FUTUREWorldwide1100
NEWARKAmericas915
RS COMPONENTSWorldwide1020
$1.05 each at 1K+ pcsreel
of
1000
LMH6646MMX/NOPB
LMH6646MMX

RoHS Status



MINI SOIC		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide14000
DIGIKEYWorldwide0
$1.05 each at 1K+ pcsreel
of
3500
LMH6646 MDC

RoHS Status

Full production
Lead Time: 6 weeks

 

Contact your distributor
CALLtray
of
N/A

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LMH730123
Evaluation Board for High-Speed Dual Op Amp in the 8-Pin MSOP PackageFull production
Lead Free (RoHS)

 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide53
$10.00 each1

Description:

National Semiconductor offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 8-Pin MSOP package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. The performance can then be evaluated under the test conditions of your choice. Power supplies, analog signal source, and other measurement equipment shall be provided by the user.

Features:

  • Accommodates various high-speed Op Amp
  • Allows quick and easy evaluation
  • Serves as reference design to aid in high-speed PCB layout
  • Utilizes surface-mount components

Evaluation Board User Manual

Evaluation Board Design Files


Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LMH6646MA/NOPB
LMH6646MA
SOIC NARROW81
1		260
235		DetailDownloadLMH6646.MOD
NSZXTT
LMH66
46MA
LMH6646MAX/NOPB
LMH6646MAX
SOIC NARROW81
1		260
235		DetailDownloadLMH6646.MOD
NSZXTT
LMH66
46MA
LMH6646MM/NOPB
LMH6646MM
MINI SOIC81
1		260
260		DetailDownloadLMH6646.MOD
ZXTT
A70A
LMH6646MMX/NOPB
LMH6646MMX
MINI SOIC81
1		260
260		DetailDownloadLMH6646.MOD
ZXTT
A70A
LMH6646 MDC
Unpackaged DieLMH6646.MOD
-

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Design Tools
TitleSizeDate
Amplifiers Selection Guide software for Windows  
LMH Family Qualification Package2791 Kbytes3-Aug-2001
CLC730036 SOIC-8 Dual Evaluation Board - Included with LMH6646MA Sample Order75 Kbytes27-Oct-98
CLC730123 MSOP-8 Dual Evaluation Board - Included with LMH6646MM Sample Order103 Kbytes22-Jun-01

CAD Symbols and Models
Download LMH6646 CAD Symbols
 Models
LMH6646.MOD

LMH6646 Webench® Custom
Design/Analyze/Build It
Select Topology
Active Filter Designer
Inverting Amplifier
AC-Coupled Inverting Amp
NonInverting Amp
Integrator
Lowpass Filter
Lowpass Filter 4th Order
Highpass Filter
Required Parameters
Supply voltage:
If "Other", Positive Supply is: V
If "Other", Negative Supply is: V
NOTE: 2.5 V <= Total Supply Voltage <= 12 V

What is Webench?

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH6646 MDCVIP 100128010011550004327734403
LMH6646MAVIP 100128010011550004327734403
LMH6646MAXVIP 100128010011550004327734403
LMH6646MMVIP 100128010011550004327734403
LMH6646MMXVIP 100128010011550004327734403

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

[Information as of 21-Mar-2010]