LMH6645 - 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option from the PowerWise® Family
Datasheet Packaging Samples & Pricing Reliability Design Tools Models Application Notes Knowledge Base

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/

General 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. More...


Applications

•Active filters
•High speed portable devices
•Multiplexing applications (LMH6647)
•Current sense buffer
•High speed transducer amp
 

ParametersValues
-3dB BW 55 MHz
AvCL for -3dB BW 1 V/V
Slew Rate 22 Volts/usec
Input OutputType R-R In and Out
Supply Min 2.5 Volt
Supply Max 12 Volt
Supply Current Per Channel 0.725 mA
PowerWise Rating 2 13.2 uA/MHz
Channels 1 Channels
Offset Voltage max, 25C 3 mV
Max Input Bias Current 4000 nA
Output Current 20 mA
Voltage Noise 17 nV/root(Hz)
Shut down No
Feedback Type Voltage
Av+1 BW 55 MHz
Av+2 BW 27.5 MHz
Av+5 BW 11 MHz
Av+10 BW 5.5 MHz
Av+20 BW 2.75 MHz
HD 2nd -62 dB
HD 3rd -72 dB
Settling Time 125 ns
Tsettling Conditions to 0.1%
Function Op Amp
Gain Bandwidth 55 MHz
Temperature Min -40 deg C
Temperature Max 85 deg C
PowerWise Yes


Typical Performance

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  WEBENCH Live Simulation!
LMH6645 Webench® Custom
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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
LMH6618▲Higher 130 MHz Bandwidth With Rail To Rail Input And Output
Additional Resources
Online Seminars Design Tools

Application Notes


Connection Diagram

*click for larger image


*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option 1088
Kbytes		 15-Jun-05 Download
LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option (Japanese)
 366 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LMH6645MASOIC NARROW8NOPB
STD		1
1		260
235		RoHS Download Full productionLMH6645.MOD
Samples with Eval Board
Buy Now 		1K+$0.71rail
of
95		NSZXTT
LMH66
45MA
6 weeks1000
LMH6645MAXSOIC NARROW8NOPB1260RoHS Download Full productionLMH6645.MOD
 
Buy Now 		1K+$0.71reel
of
2500		NSZXTT
LMH66
45MA
6 weeks5000
LMH6645MFSOT-235NOPB
STD		1
1		260
260		RoHS Download Full productionLMH6645.MOD
Samples with Eval Board
Buy Now 		1K+$0.71reel
of
1000		A68A
XTT
6 weeks15000
LMH6645MFXSOT-235NOPB
STD		1
1		260
260		RoHS Download Full productionLMH6645.MOD
 
Buy Now 		1K+$0.71reel
of
3000		A68A
XTT
8 weeks15000

General 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.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH6645MAVIP 100128010011550004327734403
LMH6645MAXVIP 100128010011550004327734403
LMH6645MFVIP 100128010011550004327734403
LMH6645MFXVIP 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.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
"LMH730227/LMH730216/LMH730165 Single High Speed Op Amp Evaluation Boards (SOIC, SOT23, and SC70) (Chinese)" 371 Kbytes 6-Dec-2006 View Online Download  
Amplifiers Selection Guide software for Windows     View    
LMH Family Qualification Package 2791 Kbytes 3-Aug-2001 View Online Download  
CLC730116 SOT23-6 Evaluation Board - Included with LMH6645MF Sample Order 93 Kbytes 22-Jun-01 View Online Download  
"LMH730227/LMH730216/LMH730165 Single High Speed Op Amp Evaluation Boards (SOIC, SOT23, and SC70)" 6588 Kbytes 15-Dec-2008 View Online Download  

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1255: Application Note 1255 An OrCAD PSPICE Library for the VIP10 High-Speed Op Amp 160
Kbytes		 19-Nov-08 Download
AN-1255 (Japanese): Application Note 1255 An OrCAD PSPICE Library for the VIP10 High-Speed Op Amp
 138 Kbytes   Download
AN-1255 (Chinese): Application Note 1255 An OrCAD PSPICE Library for the VIP10 High-Speed Op Amp
 236 Kbytes  
AN-1244: Application Note 1244 Photo-Diode Current-to-Voltage Converters 77
Kbytes		 17-Sep-02 Download
AN-1240: Application Note 1240 Video Transmission Over Twisted Pair Wire 59
Kbytes		 24-Sep-02 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 8-Nov-2009]