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LMV771
General Description Manual

National Semiconductor LMV771 General Description Manual

Manual is about: Single/Dual/Quad, Low Offset, Low Noise, RRO

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April 2007

LMV771/LMV772/LMV774

Single/Dual/Quad, Low Offset, Low Noise, RRO

Operational Amplifiers

General Description

The LMV771/LMV772/LMV774 are Single, Dual, and Quad

low noise precision operational amplifiers intended for use in

a wide range of applications. Other important characteristics

of the family include: an extended operating temperature

range of −40°C to 125°C, the tiny SC70-5 package for the

LMV771, and low input bias current.

The extended temperature range of −40°C to 125°C allows

the LMV771/LMV772/LMV774 to accommodate a broad

range of applications. The LMV771 expands National

Semiconductor’s Silicon Dust™ amplifier portfolio offering en-

hancements in size, speed, and power savings. The LMV771/

LMV772/LMV774 are guaranteed to operate over the voltage

range of 2.7V to 5.0V and all have rail-to-rail output.

The LMV771/LMV772/LMV774 family is designed for preci-

sion, low noise, low voltage, and miniature systems. These

amplifiers provide rail-to-rail output swing into heavy loads.

The maximum input offset voltage for the LMV771 is 850

μV

at room temperature and the input common mode voltage

range includes ground.

The LMV771 is offered in the tiny SC70-5 package, LMV772

in the space saving MSOP-8 and SOIC-8, and the LMV774

in TSSOP-14.

Features

(Unless otherwise noted, typical values at V

= 2.7V)

■

Guaranteed 2.7V and 5V specifications

■

Maximum V

(LMV771)

850μV (limit)

■

Voltage noise

— f = 100Hz

12.5nV/

— f = 10kHz

7.5nV/

■

Rail-to-Rail output swing

— R

= 600Ω

100 mV from rail

— R

= 2k

Ω

50 mV from rail

■

Open loop gain with R

= 2k

Ω

100 dB

■

0 to V

-0.9V

■

Supply current (per amplifier)

550 µA

■

Gain bandwidth product

3.5 MHz

■

Temperature range

−40°C to 125°C

Applications

■

Transducer amplifier

■

Instrumentation amplifier

■

Precision current sensing

■

Data acquisition systems

■

Active filters and buffers

■

Sample and hold

■

Portable/battery powered electronics

Connection Diagram

SC70-5

20039667

Top View

Instrumentation Amplifier

20039636

Silicon Dust™ is a trademark of National Semiconductor Corporation.

200396

www.national.com

LMV771/LMV772/LMV774 Single/Dual/Quad, Low Offset, Low Noise, RRO Operational Amplifiers

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Summary of LMV771

Page 1
April 2007 lmv771/lmv772/lmv774 single/dual/quad, low offset, low noise, rro operational amplifiers general description the lmv771/lmv772/lmv774 are single, dual, and quad low noise precision operational amplifiers intended for use in a wide range of applications. Other important characteristics of ...
Page 2
Absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/ distributors for availability and specifications. Esd tolerance (note 2) machine model 200v human body model 2000v differential input voltage ± supply volta...
Page 3
2.7v ac electrical characteristics (note 13) unless otherwise specified, all limits are guaranteed for t a = 25°c. V + = 5.0v, v − = 0v, v cm = v + /2, v o = v + /2 and r l > 1m Ω. Boldface limits apply at the temperature extremes. Symbol parameter conditions min (note 7) typ (note 6) max (note 7) u...
Page 4
5.0v ac electrical characteristics (note 13) unless otherwise specified, all limits are guaranteed for t a = 25°c. V + = 5.0v, v − = 0v, v cm = v + /2, v o = v + /2 and r l > 1m Ω. Boldface limits apply at the temperature extremes. Symbol parameter conditions min (note 7) typ (note 6) max (note 7) u...
Page 5
Connection diagrams sc70-5 20039667 top view 8-pin msop/soic 20039671 top view 14-pin tssop 20039672 top view ordering information package part number package marking transport media nsc drawing sc70-5 lmv771mg a75 1k units tape and reel maa05a lmv771mgx 3k units tape and reel 8-pin soic lmv772ma lm...
Page 6
Typical performance characteristics v os vs. V cm over temperature 20039627 v os vs. V cm over temperature 20039626 output swing vs. V s 20039625 output swing vs. V s 20039624 output swing vs. V s 20039623 i s vs. V s over temperature 20039630 www.National.Com 6 lmv771/lmv772/lmv774.
Page 7
V in vs. V out 20039628 v in vs. V out 20039629 sourcing current vs. V out (note 14) 20039631 sourcing current vs. V out (note 14) 20039664 sinking current vs. V out (note 14) 20039632 sinking current vs. V out (note 14) 20039663 7 www.National.Com lmv771/lmv772/lmv774.
Page 8
Input voltage noise vs. Frequency 20039608 input bias current over temperature 20039635 input bias current over temperature 20039634 input bias current over temperature 20039633 thd+n vs. Frequency 20039607 thd+n vs. V out 20039666 www.National.Com 8 lmv771/lmv772/lmv774.
Page 9
Slew rate vs. Supply voltage 20039601 open loop frequency response over temperature 20039602 open loop frequency response 20039603 open loop frequency response 20039604 open loop gain & phase with cap. Loading 20039605 open loop gain & phase with cap. Loading 20039606 9 www.National.Com lmv771/lmv77...
Page 10
Non-inverting small signal pulse response 20039617 non-inverting large signal pulse response 20039611 non-inverting small signal pulse response 20039616 non-inverting large signal pulse response 20039610 non-inverting small signal pulse response 20039615 non-inverting large signal pulse response 200...
Page 11
Inverting small signal pulse response 20039619 inverting large signal pulse response 20039614 inverting small signal pulse response 20039620 inverting large signal pulse response 20039613 inverting small signal pulse response 20039618 inverting large signal pulse response 20039612 11 www.National.Co...
Page 12
Stability vs. V cm 20039621 stability vs. V cm 20039622 psrr vs. Frequency 20039668 cmrr vs. Frequency 20039665 crosstalk rejection vs. Frequency (lmv772/lmv774) 20039694 www.National.Com 12 lmv771/lmv772/lmv774.
Page 13
Application note lmv771/lmv772/lmv774 the lmv771/lmv772/lmv774 are a family of precision am- plifiers with very low noise and ultra low offset voltage. Lmv771/lmv772/lmv774's extended temperature range of −40°c to 125°c enables the user to design this family of products into a variety of application...
Page 14
Active filter active filters are circuits with amplifiers, resistors, and capac- itors. The use of amplifiers instead of inductors, which are used in passive filters, enhances the circuit performance while reducing the size and complexity of the filter. The simplest active filters are designed using...
Page 15
High pass filter in a similar approach, one can derive the transfer function of a high pass filter. A typical first order high pass filter is shown below: 20039654 figure 5. Highpass filter writing the kcl for this circuit : (v 1 denotes the voltage between c and r 1 ) (12) (13) solving these two eq...
Page 16
20039662 figure 8. Bandpass filter transfer function state variable active filter state variable active filters are circuits that can simultane- ously represent high pass, band pass, and low pass filters. The state variable active filter uses three separate amplifiers to achieve this task. A typical...
Page 17
Bandpass filter the center frequency and quality factor for all of these filters is the same. The values can be calculated in the following manner: a design example is shown here: designing a bandpass filter with center frequency of 10khz and quality factor of 5.5 to do this, first consider the qual...
Page 18
Physical dimensions inches (millimeters) unless otherwise noted sc70-5 ns package number maa05a 8-pin soic ns package number m08a www.National.Com 18 lmv771/lmv772/lmv774.
Page 19
8-pin msop ns package number mua08a 14-pin tssop ns package number mtc14 19 www.National.Com lmv771/lmv772/lmv774.
Page 20: Notes
Notes lmv771/lmv772/lmv774 single/dual/quad, low offset, low noise, rro operational amplifiers the contents of this document are provided in connection with national semiconductor corporation (“national”) products. National makes no representations or warranties with respect to the accuracy or compl...