LMP2011MAX

LMP2011 NSC | Alldatasheet

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Technical content

Features

(For VS = 5V, Typical unless otherwise noted) n Low guaranteed VOS over temperature 60 µV n Low noise with no 1/f 35nV/ n High CMRR 130 dB n High PSRR 120 dB n High AVOL 130 dB n Wide gain-bandwidth product 3MHz n High slew rate 4V/µs n Low supply current 930µA n Rail-to-rail output 30mV n No external capacitors required

Applications

n Precision instrumentation amplifiers n Thermocouple amplifiers n Strain gauge bridge amplifier Connection Diagrams 5-Pin SOT23 8-Pin SOIC 8-Pin MSOP 20071502 Top View 20071542 Top View 20071538 Top View 14-Pin TSSOP 14-Pin LLP 20071539 Top View 20071541 Top View PRELIMINARY October 2004 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad High Precision, Rail-to-Rail Output Operational Amplifier © 2004 National Semiconductor Corporation DS200715 www.national.com

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 Human Body Model 2000V Machine Model 200V Supply Voltage 5.8V Common-Mode Input Voltage −0.3 ≤ V CM ≤ VCC +0.3V Lead Temperature (soldering 10 sec.) +300˚C Differential Input Voltage ±Supply Voltage Current at Input Pin 30 mA Current at Output Pin 30 mA Current at Power Supply Pin 50 mA Operating Ratings (Note 1) Supply Voltage 2.7V to 5.25V Storage Temperature Range −65˚C to 150˚C Operating Temperature Range LMP2011MF, LMP2011MFX −40˚C to 125˚C LMP2011MA, LPM2011MAX −40˚C to 125˚C LMP2012MM, LMP2011MMX −40˚C to 125˚C LMP2014SD, LMP2014SDX −40˚C to 125˚C LMP2014MT, LMP2014MTX 0˚C to 70˚C 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T J = 25˚C, Symbol Parameter Conditions Min (Note 3) Typ (Note 2) Max (Note 3) Units VOS Input Offset Voltage 0.8 25 µV Offset Calibration Time 0.5 10 ms TCVOS Input Offset Voltage 0.015 µV/˚C Long-Term Offset Drift 0.006 µV/month Lifetime V OS Drift 2.5 µV IIN Input Current -3 pA IOS Input Offset Current 6 pA RIND Input Differential Resistance 9 M Ω CMRR Common Mode Rejection Ratio −0.3 ≤ VCM ≤ 0.9V 0 ≤ VCM ≤ 0.9V 130 95 dB PSRR Power Supply Rejection Ratio 120 95 dB AVOL Open Loop Voltage Gain R L =1 0k Ω 130 95 90 dBRL =2k Ω 124 90 VO Output Swing R L =1 0k Ω to 1.35V VIN(diff) = ±0.5V 2.665 2.655 2.68 V0.033 0.060 0.075 RL =2k Ω to 1.35V VIN(diff) = ±0.5V 2.630 2.615 2.65 V0.061 0.085 0.105 IO Output Current Sourcing, V O =0 V VIN(diff) = ±0.5V 12 5 3 mASinking, VO =5 V VIN(diff) = ±0.5V 18 5 ROUT Output Impedance Ω IS Supply Current per Channel 0.919 1.20 1.50 mA LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 2

2.7V AC Electrical Characteristics TJ = 25˚C, V+ = 2.7V, V - = 0V, V CM = 1.35V, V O = 1.35V, and R L > 1M Ω. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 3) Typ (Note 2) Max (Note 3) Units GBW Gain-Bandwidth Product 3 MHz SR Slew Rate 4 V/µs θ m Phase Margin 60 Deg Gm Gain Margin −14 dB en Input-Referred Voltage Noise 35 nV/ in Input-Referred Current Noise pA/ enp-p Input-Referred Voltage Noise R S = 100Ω,D Ct o1 0H z 8 5 0 n V pp trec Input Overload Recovery Time 50 ms tS Output Settling time A V = +1, R L =2k Ω 1V Step ns 0.1% 0.01% AV = −1, R L =2k Ω 1V Step 0.1% 0.01% 5V, V- = 0V, V CM = 2.5V, VO = 2.5V and R L > 1MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 3) Typ (Note 2) Max (Note 3) Units VOS Input Offset Voltage 0.12 25 µV Offset Calibration Time 0.5 10 ms TCVOS Input Offset Voltage 0.015 µV/˚C Long-Term Offset Drift 0.006 µV/month Lifetime V OS Drift 2.5 µV IIN Input Current -3 pA IOS Input Offset Current 6 pA RIND Input Differential Resistance 9 M Ω CMRR Common Mode Rejection Ratio −0.3 ≤ VCM ≤ 3.2 0 ≤ VCM ≤ 3.2 130 100 dB PSRR Power Supply Rejection Ratio 120 95 dB AVOL Open Loop Voltage Gain R L =1 0k Ω 130 105 100 dBRL =2k Ω 132 95 VO Output Swing R L =1 0k Ω to 2.5V VIN(diff) = ±0.5V 4.96 4.95 4.978 V0.040 0.070 0.085 RL =2k Ω to 2.5V VIN(diff) = ±0.5V 4.895 4.875 4.919 V0.091 0.115 0.140 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com3

5V, V- = 0V, V CM = 2.5V, VO = 2.5V and R L > 1MΩ. Boldface limits apply at the temperature extremes. (Continued) Symbol Parameter Conditions Min (Note 3) Typ (Note 2) Max (Note 3) Units IO Output Current Sourcing, V O =0 V VIN(diff) = ±0.5V 15 8 6 mASinking, VO =5 V V IN(diff) = ±0.5V 17 8 ROUT Output Impedance Ω IS Supply Current per Channel 0.930 1.20 1.50 mA 1MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 3) Typ (Note 2) Max (Note 3) Units GBW Gain-Bandwidth Product 3 MHz SR Slew Rate 4 V/µs θ m Phase Margin 60 deg Gm Gain Margin −15 dB en Input-Referred Voltage Noise 35 nV/ in Input-Referred Current Noise pA/ enp-p Input-Referred Voltage Noise R S = 100Ω,D Ct o1 0H z 8 5 0 n V pp trec Input Overload Recovery Time 50 ms tS Output Settling time A V = +1, R L =2k Ω 1V Step ns 0.1% 0.01% AV = −1, R L =2k Ω 1V Step 0.1% 0.01% Note 1: Absolute Maximum Ratings indicate limits beyond which damage may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: Typical values represent the most likely parametric norm. Note 3: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlations using statistical quality control (SQC) method.

Ordering Information

Package Part Number Temperature Range Package Marking Transport Media NSC Drawing 5-Pin SOT23 LMP2011MF −40˚C to 125˚C AN1A 1k Units Tape and Reel MF05ALMP2011MFX 3k Units Tape and Reel 8-Pin MSOP LMP2012MM AP1A 1k Units Tape and Reel MUA08ALMP2012MMX 3.5k Units Tape and Reel 8-Pin SOIC LMP2011MA LMP2011MA 95 Units/Rail M08ALMP2011MAX 2.5k Units Tape and Reel 14-Pin LLP LMP2014SD P2014SD 250 Units Tape and Reel SRC14ALMP2014SDX 2.5 Units Tape and Reel 14-Pin TSSOP LMP2014MT 0˚C to 70˚C LMP2014MT 94 Units/Rail MTC14LMP2014MTX 2.5k Units Tape and Reel LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 4

Typical Performance Characteristics TA=25C, VS= 5V unless otherwise specified. Supply Current vs. Supply Voltage Offset Voltage vs. Supply Voltage 20071524 20071525 Offset Voltage vs. Common Mode Offset Voltage vs. Common Mode 20071535 20071534 Voltage Noise vs. Frequency Input Bias Current vs. Common Mode 20071504 20071503 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com5

Typical Performance Characteristics (Continued) PSRR vs. Frequency PSRR vs. Frequency 20071507 20071506 Output Sourcing @ 2.7V Output Sourcing @ 5V 20071526 20071527 Output Sinking @ 2.7V Output Sinking @ 5V 20071528 20071529 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 6

Typical Performance Characteristics (Continued) Max Output Swing vs. Supply Voltage Max Output Swing vs. Supply Voltage 20071530 20071531 Min Output Swing vs. Supply Voltage Min Output Swing vs. Supply Voltage 20071532 20071533 CMRR vs. Frequency Open Loop Gain and Phase vs. Supply Voltage 20071505 20071508 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com7

Typical Performance Characteristics (Continued) Open Loop Gain and Phase vs. R L @ 2.7V Open Loop Gain and Phase vs. R L @ 5V 20071509 20071510 Open Loop Gain and Phase vs. C L @ 2.7V Open Loop Gain and Phase vs. C L @ 5V 20071511 20071512 Open Loop Gain and Phase vs. Temperature @ 2.7V Open Loop Gain and Phase vs. Temperature @ 5V 20071536 20071537 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 8

Typical Performance Characteristics (Continued) THD+N vs. AMPL THD+N vs. Frequency 20071514 20071513 0.1 Hz − 10 Hz Noise vs. Time 20071515 LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com9

Application Information

Using patented methods, the LMP201X eliminates the 1/f noise present in other amplifiers. That noise, which in- creases as frequency decreases, is a major source of mea- surement error in all DC-coupled measurements. Low- frequency noise appears as a constantly-changing signal in series with any measurement being made. As a result, even when the measurement is made rapidly, this constantly- changing noise signal will corrupt the result. The value of this noise signal can be surprisingly large. For example: If a conventional amplifier has a flat-band noise level of 10nV/ and a noise corner of 10 Hz, the RMS noise at 0.001 Hz is 1µV/ . This is equivalent to a 0.50 µV peak-to- peak error, in the frequency range 0.001 Hz to 1.0 Hz. In a circuit with a gain of 1000, this produces a 0.50 mV peak- to-peak output error. This number of 0.001 Hz might appear unreasonably low, but when a data acquisition system is operating for 17 minutes, it has been on long enough to include this error. In this same time, the LMP201X will only have a 0.21 mV output error. This is smaller by 2.4 x. Keep in mind that this 1/f error gets even larger at lower frequen- cies. At the extreme, many people try to reduce this error by integrating or taking several samples of the same signal. This is also doomed to failure because the 1/f nature of this noise means that taking longer samples just moves the measurement into lower frequencies where the noise level is even higher. The LMP201X eliminates this source of error. The noise level is constant with frequency so that reducing the band- width reduces the errors caused by noise. Another source of error that is rarely mentioned is the error voltage caused by the inadvertent thermocouples created when the common "Kovar type" IC package lead materials are soldered to a copper printed circuit board. These steel- based leadframe materials can produce over 35 µV/˚C when soldered onto a copper trace. This can result in thermo- couple noise that is equal to the LMP201X noise when there is a temperature difference of only 0.0014˚C between the lead and the board! For this reason, the lead-frame of the LMP201X is made of copper. This results in equal and opposite junctions which cancel this effect. The extremely small size of the SOT-23 package results in the leads being very close together. This further reduces the probability of temperature differences and hence decreases thermal noise. OVERLOAD RECOVERY The LMP201X recovers from input overload much faster than most chopper-stabilized op amps. Recovery from driv- ing the amplifier to 2X the full scale output, only requires about 40 ms. Many chopper-stabilized amplifiers will take from 250 ms to several seconds to recover from this same overload. This is because large capacitors are used to store the unadjusted offset voltage. The wide bandwidth of the LMP201X enhances performance when it is used as an amplifier to drive loads that inject transients back into the output. ADCs (Analog-to-Digital Con- verters) and multiplexers are examples of this type of load. To simulate this type of load, a pulse generator producing a 1V peak square wave was connected to the output through a 10 pF capacitor. (Figure 1) The typical time for the output to recover to 1% of the applied pulse is 80 ns. To recover to 0.1% requires 860ns. This rapid recovery is due to the wide bandwidth of the output stage and large total GBW. NO EXTERNAL CAPACITORS REQUIRED The LMP201X does not need external capacitors. This elimi- nates the problems caused by capacitor leakage and dielec- tric absorption, which can cause delays of several seconds from turn-on until the amplifier’s error has settled. MORE BENEFITS The LMP201X offers the benefits mentioned above and more. It has a rail-to-rail output and consumes only 950 µA of supply current while providing excellent DC and AC electrical performance. In DC performance, the LMP201X achieves 130 dB of CMRR, 120 dB of PSRR and 130 dB of open loop gain. In AC performance, the LMP201X provides 3 MHz of gain-bandwidth product and 4 V/µs of slew rate. HOW THE LMP201X WORKS The LMP201X uses new, patented techniques to achieve the high DC accuracy traditionally associated with chopper- stabilized amplifiers without the major drawbacks produced by chopping. The LMP201X continuously monitors the input offset and corrects this error. The conventional chopping process produces many mixing products, both sums and differences, between the chopping frequency and the incom- ing signal frequency. This mixing causes large amounts of distortion, particularly when the signal frequency approaches the chopping frequency. Even without an incoming signal, the chopper harmonics mix with each other to produce even more trash. If this sounds unlikely or difficult to understand, look at the plot (Figure 2), of the output of a typical (MAX432) chopper-stabilized op amp. This is the output when there is no incoming signal, just the amplifier in a gain of -10 with the input grounded. The chopper is operating at about 150 Hz; the rest is mixing products. Add an input signal and the noise gets much worse. Compare this plot with Figure 3 of the LMP201X. This data was taken under the exact same con- ditions. The auto-zero action is visible at about 30 kHz but note the absence of mixing products at other frequencies. As a result, the LMP201X has very low distortion of 0.02% and very low mixing products. 20071516 FIGURE 1. LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 10

Application Information (Continued) LMP201X AS ADC INPUT AMPLIFIER The LMP201X is a great choice for an amplifier stage imme- diately before the input of an ADC (Analog-to-Digital Con- verter), whether AC or DC coupled. See Figure 7and Figure 8. This is because of the following important characteristics: A) Very low offset voltage and offset voltage drift over time and temperature allow a high closed-loop gain setting without introducing any short-term or long-term errors. For example, when set to a closed-loop gain of 100 as the analog input amplifier for a 12-bit A/D converter, the overall conversion error over full operation temperature and 30 years life of the part (operating at 50˚C) would be less than 5 LSBs. B) Fast large-signal settling time to 0.01% of final value (1.4 µs) allows 12 bit accuracy at 100 KH Z or more sampling rate. C) No flicker (1/f) noise means unsurpassed data accuracy over any measurement period of time, no matter how long. Consider the following op amp performance, based on a typical low-noise, high-performance commercially- available device, for comparison: Op amp flatband noise = 8nV/ 1/f corner frequency = 100 Hz A V = 2000 Measurement time = 100 sec Bandwidth=2H z This example will result in about 2.2 mV PP (1.9 LSB) of output noise contribution due to the op amp alone, com- pared to about 594 µV PP (less than 0.5 LSB) when that op amp is replaced with the LMP201X which has no 1/f contribution. If the measurement time is increased from 100 seconds to 1 hour, the improvement realized by using the LMP201X would be a factor of about 4.8 times (2.86 mV PP compared to 596 µV when LMP201X is used) mainly because the LMP201X accuracy is not compromised by increasing the observation time. D) Copper leadframe construction minimizes any thermo- couple effects which would degrade low level/high gain data conversion application accuracy (see discussion under "The Benefits of the LMP201X" section above). E) Rail-to-Rail output swing maximizes the ADC dynamic range in 5-Volt single-supply converter applications. Be- low are some typical block diagrams showing the LMP201X used as an ADC amplifier (Figure 7and Figure 8). 20071522 FIGURE 8. LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com13

Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT23 8-Pin MSOP LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com 14

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Pin SOIC 14-Pin TSSOP LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad www.national.com15

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-LLP National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com LMP2011 Single/ LMP2012 Dual/ LMP2014 Quad High Precision, Rail-to-Rail Output Operational Amplifier