LMV341,LMV342,LMV344 LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V,Rail-to-Rail Output, 125C, Operational Amplifiers Literature Number: SNOS990F LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V, Rail-to-Rail Output, 125°C, Operational Amplifiers strained PC board requirements include portable electronics such as cellular handsets and PDAs. General Description The LMV341/LMV342/LMV344 are single, dual, and quad low voltage, low power Operational Amplifiers. They are designed specifically for low voltage portable applications. Other important product characteristics are low input bias current, railto-rail output, and wide temperature range. The patented class AB turnaround stage significantly reduces the noise at higher frequencies, power consumption, and offset voltage. The PMOS input stage provides the user with ultra-low input bias current of 20fA (typical) and high input impedance. The industrial-plus temperature range of −40°C to 125°C allows the LMV341/LMV342/LMV344 to accommodate a broad range of extended environment applications. LMV341 expands National Semiconductor's Silicon Dust™ amplifier portfolio offering enhancements in size, speed, and power savings. The LMV341/LMV342/LMV344 are guaranteed to operate over the voltage range of 2.7V to 5.5V and all have rail-to-rail output. The LMV341 offers a shutdown pin that can be used to disable the device. Once in shutdown mode, the supply current is reduced to 45pA (typical). The LMV341/LMV342/LMV344 have 29nV Voltage Noise at 10KHz, 1MHz GBW, 1.0V/μs Slew Rate, 0.25mVos, and 0.1μA shutdown current (LMV341.) The LMV341 is offered in the tiny 6-Pin SC70 package, the LMV342 in space saving 8-Pin MSOP and SOIC, and the LMV344 in 14-Pin TSSOP and SOIC. These small package amplifiers offer an ideal solution for applications requiring minimum PC board footprint. Applications with area con- Features (Typical 2.7V supply values; unless otherwise noted) ■ Guaranteed 2.7V and 5V specifications 29nV/√Hz ■ Input referred voltage noise (@ 10kHz) 100μA ■ Supply current (per amplifier) 1.0MHz ■ Gain bandwidth product 1.0V/μs ■ Slew rate 45pA ■ Shutdown Current (LMV341) 5μs ■ Turn-on time from shutdown (LMV341) 20fA ■ Input bias current Applications ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Cordless/cellular phones Laptops PDAs PCMCIA/Audio Portable/battery-powered electronic equipment Supply current monitoring Battery monitoring Buffer Filter Driver Sample and Hold Circuit 20030444 Silicon Dust™ is a trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation 200304 www.national.com LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V, Rail-to-Rail Output, 125°C, Operational Amplifiers January 25, 2008 LMV341/LMV342/LMV344 Infrared or Convection Reflow (20 sec.) Wave Soldering Lead Temp. (10 sec.) 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 Human Body Model Differential Input Voltage Supply Voltage (V + -V −) Output Short Circuit to V + Output Short Circuit to V − Storage Temperature Range Junction Temperature (Note 5) Mounting Temperature Operating Ratings 200V 2000V ± Supply Voltage 6.0V (Note 3) (Note 4) −65°C to 150°C 150°C 2.7V DC Electrical Characteristics 235°C 260°C (Note 1) Supply Voltage Temperature Range 2.7V to 5.5V −40°C to 125°C Thermal Resistance (θ JA) 6-Pin SC70 8-Pin SOIC 8-Pin MSOP 14-Pin TSSOP 14-Pin SOIC 414°C/W 190°C/W 235°C/W 155°C/W 145°C/W (Note 10) Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 2.7V, V− = 0V, VCM = V+/2, VO = V+/2 and RL > 1MΩ. Boldface limits apply at the temperature extremes. Symbol VOS Parameter Input Offset Voltage Conditions Min (Note 7) Typ (Note 6) Max (Note 7) LMV341 0.25 4 4.5 LMV342/LMV344 0.55 5 5.5 TCVOS Input Offset Voltage Average Drift 1.7 IB Input Bias Current 0.02 IOS Input Offset Current IS Supply Current Shutdown Mode, VSD = 0V (LMV341) mV µV/°C 120 250 pA 100 170 230 μA 45pA 1μA 1.5μA 6.6 Per Amplifier Units fA 0V ≤ VCM ≤ 1.7V 56 50 80 dB Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 5V 65 60 82 dB VCM Input Common Mode Voltage For CMRR ≥ 50dB 0 −0.2 to 1.9 (Range) AV Large Signal Voltage Gain RL = 10kΩ to 1.35V 78 70 113 RL = 2kΩ to 1.35V 72 64 103 CMRR Common Mode Rejection Ratio PSRR 0V ≤ VCM ≤ 1.6V VO Output Swing 24 RL = 2kΩ to 1.35V 60 95 30 40 www.national.com 2 V dB 60 95 26 5.0 RL = 10kΩ to 1.35V 1.7 5.3 30 40 mV IO Parameter Output Short Circuit Current Conditions Min (Note 7) Typ (Note 6) Sourcing LMV341/LMV342 20 32 Sourcing LMV344 18 24 Sinking 15 24 ton Turn-on Time from Shutdown (LMV341) VSD Shutdown Pin Voltage Range ON Mode (LMV341) Max (Note 7) Units mA μs 5 Shutdown Mode (LMV341) 2.7V AC Electrical Characteristics 1.7 to 2.7 2.4 to 2.7 0 to 1 0 to 0.8 V (Note 10) Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 2.7V, V− = 0V, VCM = V+/2, VO = V+/2 and RL > 1MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 7) Typ (Note 6) Max (Note 7) Units SR Slew Rate RL = 10kΩ, (Note 9) 1.0 V/μs GBW Gain Bandwidth Product RL = 100kΩ, CL = 200pF 1.0 MHz Φm Phase Margin RL = 100kΩ 72 deg Gm Gain Margin RL = 100kΩ 20 dB en Input-Referred Voltage Noise f = 1kHz 40 nV/ in Input-Referred Current Noise f = 1kHz 0.001 pA/ THD Total Harmonic Distortion f = 1kHz, AV = +1 0.017 % RL = 600Ω, VIN = 1VPP 5V DC Electrical Characteristics (Note 10) Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, VO = V+/2 and R L > 1MΩ. Boldface limits apply at the temperature extremes. Symbol VOS Parameter Input Offset Voltage Conditions Min (Note 7) Typ (Note 6) Max (Note 7) LMV341 0.025 4 4.5 LMV342/LMV344 0.70 5 5.5 TCVOS Input Offset Voltage Average Drift 1.9 IB Input Bias Current 0.02 IOS Input Offset Current IS Supply Current Shutdown Mode, VSD = 0V (LMV341) mV µV/°C 200 375 6.6 Per Amplifier Units pA fA 107 200 260 μA 0.033 1 1.5 μA 0V ≤ VCM ≤ 4.0V 56 50 86 dB Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 5V 65 60 82 dB Input Common Mode Voltage For CMRR ≥ 50dB 0 −0.2 to 4.2 (Range) CMRR Common Mode Rejection Ratio PSRR VCM 0V ≤ VCM ≤ 3.9V 3 4 V www.national.com LMV341/LMV342/LMV344 Symbol LMV341/LMV342/LMV344 Symbol AV Parameter Conditions Large Signal Voltage Gain (Note RL = 10kΩ to 2.5V 8) RL = 2kΩ to 2.5V VO Output Swing Min (Note 7) Typ (Note 6) 78 70 116 72 64 107 Output Short Circuit Current 7 Sourcing 85 113 Sinking 50 75 ton Turn-on Time from Shutdown (LMV341) VSD Shutdown Pin Voltage Range ON Mode (LMV341) mV 34 30 40 30 40 mV mA 5 Shutdown Mode (LMV341) 5V AC Electrical Characteristics 60 95 7 RL = 10kΩ to 2.5V Units dB 32 RL = 2kΩ to 2.5V 60 95 IO Max (Note 7) µs 3.1 to 5 4.5 to 5.0 0 to 1 0 to 0.8 V (Note 10) Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, VO = V+/2 and R L > 1MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 7) Typ (Note 6) Max (Note 7) Units SR Slew Rate RL = 10kΩ, (Note 9) 1.0 V/µs GBW Gain-Bandwidth Product RL = 10kΩ, CL = 200pF 1.0 MHz Φm Phase Margin RL = 100kΩ 70 deg Gm Gain Margin RL = 100kΩ 20 dB en Input-Referred Voltage Noise f = 1kHz 39 nV/ in Input-Referred Current Noise f = 1kHz 0.001 pA/ THD Total Harmonic Distortion f = 1kHz, AV = +1 0.012 % RL = 600Ω, VIN = 1VPP Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device 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 the test conditions, see the Electrical Characteristics. Note 2: Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC) Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC). Note 3: Shorting output to V+ will adversely affect reliability. Note 4: Shorting output to V- will adversely affect reliability. Note 5: The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) – TA)/ θJA. All numbers apply for packages soldered directly onto a PC Board. Note 6: Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on shipped production material. Note 7: All limits are guaranteed by testing or statistical analysis. Note 8: RL is connected to mid-supply. The output voltage is GND + 0.2V ≤ VO ≤ V+ −0.2V Note 9: Connected as voltage follower with 2VPP step input. Number specified is the slower of the positive and negative slew rates. Note 10: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where TJ > TA. www.national.com 4 6-Pin SC70 8-Pin MSOP/SOIC 20030441 Top View 14-Pin TSSOP/SOIC 20030452 20030451 Top View Top View Ordering Information Package 6-Pin SC70 8-Pin MSOP 8-Pin SOIC 14-Pin TSSOP 14-Pin SOIC Part Number LMV341MG LMV341MGX LMV342MM LMV342MMX LMV342MA LMV342MAX LMV344MT LMV344MTX LMV344MA LMV344MAX Package Marking Transport Media 1k Units Tape and Reel A78 3k Units Tape and Reel 1k Units Tape and Reel A82A 3.5k Units Tape and Reel LMV342MA LMV344MT LMV344MA 5 95 Units/Rail 2.5k Units Tape and Reel Rails 2.5k Units Tape and Reel 55 Units/Rail 2.5k Units Tape and Reel NSC Drawing MAA06A MUA08A M08A MTC14 M14A www.national.com LMV341/LMV342/LMV344 Connection Diagrams LMV341/LMV342/LMV344 Typical Performance Characteristics Supply Current vs. Supply Voltage (LMV341) Input Current vs. Temperature 20030428 20030446 Output Voltage Swing vs. Supply Voltage Output Voltage Swing vs. Supply Voltage 20030426 20030427 ISOURCE vs. VOUT ISOURCE vs. VOUT 20030429 www.national.com 20030430 6 LMV341/LMV342/LMV344 ISINK vs. VOUT ISINK vs. VOUT 20030432 20030431 VOS vs. VCM VOS vs. VCM 20030433 20030434 VIN vs. VOUT VIN vs. VOUT 20030435 20030436 7 www.national.com LMV341/LMV342/LMV344 CMRR vs. Frequency PSRR vs. Frequency 20030401 20030403 Input Voltage Noise vs. frequency Slew Rate vs. VSUPPLY 20030404 20030402 Slew Rate vs. Temperature Slew Rate vs. Temperature 20030422 www.national.com 20030423 8 LMV341/LMV342/LMV344 THD+N vs. Frequency THD+N vs. VOUT 20030425 20030424 Open Loop Frequency Over Temperature Open Loop Frequency Response 20030421 20030420 Open Loop Frequency Response Gain and Phase vs. CL 20030419 20030417 9 www.national.com LMV341/LMV342/LMV344 Gain and Phase vs. CL Stability vs. Capacitive Load 20030448 20030418 Stability vs. Capacitive Load Non-Inverting Small Signal Pulse Response 20030405 20030449 Non-Inverting Large Signal Pulse Response Non-Inverting Small Signal Pulse Response 20030408 20030406 www.national.com 10 Non-Inverting Small Signal Pulse Response 20030409 20030407 Non-Inverting Large Signal Pulse Response Inverting Small Signal Pulse Response 20030410 20030411 Inverting Large Signal Pulse Response Inverting Small Signal Pulse Response 20030414 20030412 11 www.national.com LMV341/LMV342/LMV344 Non-Inverting Large Signal Pulse Response LMV341/LMV342/LMV344 Inverting Large Signal Pulse Response Inverting Small Signal Pulse Response 20030415 20030413 Inverting Large Signal Pulse Response Crosstalk Rejection vs. Frequency 20030416 20030454 www.national.com 12 LMV341/LMV342/LMV344 The LMV341/LMV342/LMV344 family of amplifiers features low voltage, low power, and rail-to-rail output operational amplifiers designed for low voltage portable applications. The family is designed using all CMOS technology. This results in an ultra low input bias current. The LMV341 has a shutdown option, which can be used in portable devices to increase battery life. A simplified schematic of the LMV341/LMV342/LMV344 family of amplifiers is shown in Figure 1. The PMOS input differential pair allows the input to include ground. The output of this differential pair is connected to the Class AB turnaround stage. This Class AB turnaround has a lower quiescent current, compared to regular turnaround stages. This results in lower offset, noise, and power dissipation, while slew rate equals that of a conventional turnaround stage. The output of the Class AB turnaround stage provides gate voltage to the complementary common-source transistors at the output stage. These transistors enable the device to have rail-to-rail output. SAMPLE AND HOLD CIRCUIT The lower input bias current of the LMV341 results in a very high input impedance. The output impedance when the device is in shutdown mode is quite high. These high impedances, along with the ability of the shutdown pin to be derived from a separate power source, make LMV341 a good choice for sample and hold circuits. The sample clock should be connected to the shutdown pin of the amplifier to rapidly turn the device on or off. Figure 2 shows the schematic of a simple sample and hold circuit. When the sample clock is high the first amplifier is in normal operation mode and the second amplifier acts as a buffer. The capacitor, which appears as a load on the first amplifier, will be charging at this time. The voltage across the capacitor is that of the non-inverting input of the first amplifier since it is connected as a voltage-follower. When the sample clock is low the first amplifier is shut off, bringing the output impedance to a high value. The high impedance of this output, along with the very high impedance on the input of the second amplifier, prevents the capacitor from discharging. There is very little voltage droop while the first amplifier is in shutdown mode. The second amplifier, which is still in normal operation mode and is connected as a voltage follower, also provides the voltage sampled on the capacitor at its output. 20030453 FIGURE 1. Simplified Schematic 20030444 FIGURE 2. Sample and Hold Circuit CLASS AB TURNAROUND STAGE AMPLIFIER This patented folded cascode stage has a combined class AB amplifier stage, which replaces the conventional folded cascode stage. Therefore, the class AB folded cascode stage runs at a much lower quiescent current compared to conventional folded cascode stages. This results in significantly smaller offset and noise contributions. The reduced offset and noise contributions in turn reduce the offset voltage level and the voltage noise level at the input of the LMV341/LMV342/ LMV344. Also the lower quiescent current results in a high open-loop gain for the amplifier. The lower quiescent current does not affect the slew rate of the amplifier nor its ability to handle the total current swing coming from the input stage. The input voltage noise of the device at low frequencies, below 1kHz, is slightly higher than devices with a BJT input stage; However the PMOS input stage results in a much lower input bias current and the input voltage noise drops at frequencies above 1kHz. SHUTDOWN FEATURE The LMV341 is capable of being turned off in order to conserve power and increase battery life in portable devices. Once in shutdown mode the supply current is drastically reduced, 1µA maximum, and the output will be "tri-stated." The device will be disabled when the shutdown pin voltage is pulled low. The shutdown pin should never be left unconnected. Leaving the pin floating will result in an undefined operation mode and the device may oscillate between shutdown and active modes. The LMV341 typically turns on 2.8µs after the shutdown voltage is pulled high. The device turns off in less than 400ns after shutdown voltage is pulled low. Figure 3 and Figure 4 show the turn-on and turn-off time of the LMV341, respectively. In order to reduce the effect of the capacitance added to the circuit by the scope probe, in the turn-off time circuit a resistive load of 600Ω is added. Figure 5 and Figure 6 show the test circuits used to obtain the two plots. 13 www.national.com LMV341/LMV342/LMV344 Application Section LMV341/LMV342/LMV344 20030443 FIGURE 6. Turn-off Time LOW INPUT BIAS CURRENT The LMV341/LMV342/LMV344 Amplifiers have a PMOS input stage. As a result, they will have a much lower input bias current than devices with BJT input stages. This feature makes these devices ideal for sensor circuits. A typical curve of the input bias current of the LMV341 is shown in Figure 7. 20030440 FIGURE 3. Turn-on Time 20030439 FIGURE 4. Turn-off Time 20030447 FIGURE 7. Input Bias Current vs. VCM 20030442 FIGURE 5. Turn-on Time www.national.com 14 LMV341/LMV342/LMV344 Physical Dimensions inches (millimeters) unless otherwise noted 6-Pin SC70 NS Package Number MAA06A 8-Pin MSOP NS Package Number MUA08A 15 www.national.com LMV341/LMV342/LMV344 8-Pin SOIC NS Package Number M08A 14-Pin TSSOP NS Package Number MTC14 www.national.com 16 LMV341/LMV342/LMV344 14-Pin SOIC NS Package Number M14A 17 www.national.com LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V, Rail-to-Rail Output, 125°C, Operational Amplifiers Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH www.national.com/webench Audio www.national.com/audio Analog University www.national.com/AU Clock Conditioners www.national.com/timing App Notes www.national.com/appnotes Data Converters www.national.com/adc Distributors www.national.com/contacts Displays www.national.com/displays Green Compliance www.national.com/quality/green Ethernet www.national.com/ethernet Packaging www.national.com/packaging Interface www.national.com/interface Quality and Reliability www.national.com/quality LVDS www.national.com/lvds Reference Designs www.national.com/refdesigns Power Management www.national.com/power Feedback www.national.com/feedback Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www.national.com/led PowerWise www.national.com/powerwise Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors Wireless (PLL/VCO) www.national.com/wireless THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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