LM7121 - 175 MHz Tiny Low Power Voltage Feedback Amplifier
Datasheet Packaging Samples & Pricing Reliability Design Tools Models Knowledge Base

Features
(Typical unless otherwise noted) VS = ±15V
•Easy to use voltage feedback topology
•Stable with unlimited capacitive loads
•Tiny SOT23-5 package-typical circuit layout takes half the space of SO-8 designs
•Unity gain frequency: 175 MHz
•Bandwidth (-3 dB, AV = +1, RL = 100Ohm): 235 MHz
•Slew rate: 1300V/µs
•Supply Voltages SO-8: 5V to ±15V SOT23-5: 5V to ±5V
•Characterized for: +5V, ±5V, ±15V
•Low supply current: 5.3 mA

General Description

The LM7121 is a high performance operational amplifier which addresses the increasing AC performance needs of video and imaging applications, and the size and power constraints of portable applications.

The LM7121 can operate over a wide dynamic range of supply voltages, from 5V (single supply) up to ±15V (see the Application Information section for more details). More...


Applications

•Scanners, color fax, digital copiers
•PC video cards
•Cable drivers
•Digital cameras
•ADC/DAC buffers
•Set-top boxes
  Typical Application
*click for larger image


ParametersValues
-3dB BW 235 MHz
AvCL for -3dB BW 1 V/V
Slew Rate 1300 Volts/usec
Input OutputType Not Rail to Rail
Supply Min 4.5 Volt
Supply Max 33 Volt
Supply Current Per Channel 4.8 mA
PowerWise Rating 2 20.4 uA/MHz
Channels 1 Channels
Offset Voltage max, 25C 8 mV
Max Input Bias Current 12000 nA
Output Current 52 mA
Voltage Noise 17 nV/root(Hz)
Shut down No
Feedback Type Voltage
Av+1 BW 235 MHz
Av+2 BW 117.5 MHz
Av+5 BW 47 MHz
Av+10 BW 23.5 MHz
Av+20 BW 11.75 MHz
Diff Gain 0.3 dB
Diff Phase 0.65 %
Settling Time 65 ns
Tsettling Conditions to 0.1%
Function Op Amp
Gain Bandwidth 175 MHz
Temperature Min -40 deg C
Temperature Max 85 deg C
Automotive Yes
PowerWise Yes

  WEBENCH Live Simulation!
LM7121 Webench® Custom
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Required Parameters
Supply voltage:
If "Other", Positive Supply is: V
If "Other", Negative Supply is: V
NOTE: 4.5 V <= Total Supply Voltage <= 33 V

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Additional Resources
Design Tools


Connection Diagram

*click for larger image


*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM7121 235 MHz Tiny Low Power Voltage Feedback Amplifier 666
Kbytes		 2-Sep-99 Download
LM7121 235 MHz Tiny Low Power Voltage Feedback Amplifier (Japanese)
 466 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
LM7121IMSOIC NARROW8NOPB
STD		1
1		260
235		RoHS Download Full productionLM7121.MOD
Samples
Buy Now 		1K+$1.13rail
of
95		NSZXTT
LM71
21IM
6 weeks500
LM7121IMXSOIC NARROW8NOPB1260RoHS Download Full productionLM7121.MOD
 
Buy Now 		1K+$1.13reel
of
2500		NSZXTT
LM71
21IM
6 weeks5000
LM7121IM5SOT-235NOPB
STD		1
1		260
260		RoHS Download Full productionLM7121.MOD
Samples
Buy Now 		1K+$1.13reel
of
1000		A03A
XTT
6 weeks2000
LM7121IM5XSOT-235NOPB
STD		1
1		260
260		RoHS Download Full productionLM7121.MOD
 
Buy Now 		1K+$1.13reel
of
3000		A03A
XTT
6 weeks7500

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM7121IN
NONE
NONE
06 Sep 2000

General Description

The LM7121 is a high performance operational amplifier which addresses the increasing AC performance needs of video and imaging applications, and the size and power constraints of portable applications.

The LM7121 can operate over a wide dynamic range of supply voltages, from 5V (single supply) up to ±15V (see the Application Information section for more details). It offers an excellent speed-power product delivering 1300V/µs and 235 MHz Bandwidth (-3 dB, AV = +1). Another key feature of this operational amplifier is stability while driving unlimited capacitive loads.

Due to its Tiny SOT23-5 package, the LM7121 is ideal for designs where space and weight are the critical parameters. The benefits of the Tiny package are evident in small portable electronic devices, such as cameras, and PC video cards. Tiny amplifiers are so small that they can be placed anywhere on a board close to the signal source or near the input to an A/D converter.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM7121IMVIP III0155750012125003344050185
LM7121IM5VIP III0155750012125003344050185
LM7121IM5XVIP III0155750012125003344050185
LM7121IMXVIP III0155750012125003344050185

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    
Amplifiers Selection Guide software for Windows     View    

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[Information as of 8-Nov-2009]