Data Sheet LMV321 General Description FEATURES n 130μA supply current n 1MHz gain bandwidth n Input voltage range with 5V supply: -0.2V to 4.2V n Output voltage range with 5V supply: 0.065V to 4.99V n >1V/μs slew rate n No crossover distortion n Fully specified at 2.7V and 5V supplies n LMV321: Pb-free TSOT-5 The LMV321 is fabricated on a CMOS process. It offers 1MHz gain bandwidth product and >1V/μs slew rate. The combination of low power, low supply voltage operation, and rail-to-rail performance make the LMV321 well suited for battery-powered systems. The LMV321 is packaged in the space saving TSOT-5 package. TSOT-5 package is pin compatible with the SOT23-5 package. Typical Performance Examples Vout vs. Vcm Slew Rate vs. Supply Voltage μ APPLICATIONS n Portable/battery-powered applications n Mobile communications, cell phones, pagers n ADC buffer n Active filters n Portable test instruments n Signal conditioning n Medical Equipment n Portable medical instrumentation The LMV321 is a single channel, low cost, voltage feedback amplifier. The LMV321 consumes only 130μA of supply current and is designed to operate from a supply range of 2.7V to 5.5V (±1.35 to ±2.75). The input voltage range extends 200mV below the negative rail and 800mV below the positive rail. Ω Vin = 1Vpp Rev 1A Ordering Information Part Number Package Pb-Free RoHS Compliant Operating Temperature Range Packaging Method LMV321IST5X TSOT-5 Yes Yes -40°C to +85°C Reel Moisture sensitivity level for all parts is MSL-1. Exar Corporation 48720 Kato Road, Fremont CA 94538, USA LMV321 General Purpose, Rail-to-Rail Output Amplifier General Purpose, Rail-to-Rail Output Amplifier Rail-to-Rail Amplifiers www.exar.com Tel. +1 510 668-7000 - Fax. +1 510 668-7001 Data Sheet LMV321 Pin Assignments1 LMV321 Pin Configuration +IN 5 1 2 -IN 3 + - 4 OUT Pin Name Description 1 +IN Positive input 2 -VS Negative supply 3 -IN Negative input 4 OUT Output 5 +VS Positive supply LMV321 General Purpose, Rail-to-Rail Output Amplifier -V S +VS Pin No. Notes: 1.Pin compatible to SOT23-5. Rev 1A ©2009-2013 Exar Corporation 2/15 Rev 1A Data Sheet Absolute Maximum Ratings The safety of the device is not guaranteed when it is operated above the “Absolute Maximum Ratings”. The device should not be operated at these “absolute” limits. Adhere to the “Recommended Operating Conditions” for proper device function. The information contained in the Electrical Characteristics tables and Typical Performance plots reflect the operating conditions noted on the tables and plots. Min Supply Voltage Input Voltage Range Continuous Output Current Max LMV321 General Purpose, Rail-to-Rail Output Amplifier Parameter Unit 7 V -VS-0.4V +VS V Output is protected against momentary short circuit Reliability Information Parameter Min Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Package Thermal Resistance 5-Lead TSOT Typ -65 Max Unit 150 150 260 °C °C °C 221 °C/W Notes: Package thermal resistance (qJA), JDEC standard, multi-layer test boards, still air. ESD Protection Product Human Body Model (HBM) Charged Device Model (CDM) TSOT-5 2kV 2kV Recommended Operating Conditions Parameter Min Operating Temperature Range Supply Voltage Range -40 2.7 Typ Max Unit +85 5.5 °C V Rev 1A ©2009-2013 Exar Corporation 3/15 Rev 1A Data Sheet Electrical Characteristics at +2.7V TA = 25°C, VS = +2.7V, Rf = Rg =10 KΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Symbol Parameter Conditions Min Typ Max Units 1.7 7 mV DC Performance Input Offset Voltage dVIO Average Drift Ib Input Bias Current <1 250 nA IOS Input Offset Current <1 50 nA CMRR Common Mode Rejection Ratio 0V ≤ VCM ≤ 1.7V 50 63 dB PSRR Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 5V, VO=1V, VCM=1V 50 60 dB CMIR Common Mode Input Range For VCM ≤ 50 dB 0 -0.2 V VOUT Output Voltage Swing RL = 10kΩ to VS / 2 V+ -100 V+ -10 5 1.9 IS Supply Current µV/°C 1.7 V mV 60 180 mV 110 170 μA AC Performance GBWP Gain Bandwidth Product Φm Phase Margin CL=200 pF 60 1 ° Gm Gain Margin 10 dB en Input Voltage Noise 46 nV/√Hz f = 1kHz MHz Notes: Min max specifications are guaranteed by testing, design, or characterization LMV321 General Purpose, Rail-to-Rail Output Amplifier VIO Rev 1A ©2009-2013 Exar Corporation 4/15 Rev 1A Data Sheet Electrical Characteristics at +5V TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min Typ Max Units DC Performance Input Offset Voltage 1.7 7 9 dVIO Average Drift Ib Input Bias Current 5 <1 µV/°C 250 500 <1 mV IOS Input Offset Current CMRR Common Mode Rejection Ratio 0V ≤ VCM ≤ 4V 50 65 dB PSRR Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 5V, VO=1V, VCM=1V 50 60 dB CMIR Common Mode Input Range For VCM ≤ 50 dB 0 -0.2 4.2 AOL Open-Loop Gain RL = 2kΩ 15 50 150 nA V 4 100 Output Voltage Swing RL = 2kΩ to VS / 2 V+ -300 V+ -400 V+ -40 120 mV 300 400 RL = 10kΩ to VS / 2 V+ -100 V+ -200 V+ -10 65 IS Short Circuit Output Current Sourcing VO=0V 5 60 Sinking VO=5V 10 160 Supply Current 130 mV mV 180 280 ISC V V/mV 10 VOUT nA mV mA mA 250 350 μA AC Performance Slew Rate GBWP Gain Bandwidth Product Φm Phase Margin 60 ° Gm Gain Margin 10 dB en Input Voltage Noise 39 nV/√Hz CL=200 pF f = 1kHz >1 V/µs 1 MHz Notes: Min max specifications are guaranteed by testing, design, or characterization ©2009-2013 Exar Corporation 5/15 Rev 1A Rev 1A SR LMV321 General Purpose, Rail-to-Rail Output Amplifier VIO Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. VIO vs. CMR +2.7V VIO vs. CMR +5V VOUT vs. VCM +2.7V vs.Signal VCM +5V Non-Inverting Non-Inverting Non-InvertingVSmall Small Small Signal Signal Pulse Pulse Pulse Response Response Response OUT Input Current vs. Temperature Rev 1A Supply Current vs. Supply Voltage μA) ©2009-2013 Exar Corporation 6/15 LMV321 General Purpose, Rail-to-Rail Output Amplifier Rev 1A Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Sinking Current vs. Output Voltage +2.7V Sinking Current vs. Output Voltage +5V Sourcing Current vs. Output Voltage +2.7V Sourcing Current vs.Signal Output Voltage +5V Non-Inverting Non-Inverting Non-Inverting Small Small Small Signal Signal Pulse Pulse Pulse Response Response Response Short Circuit Current vs. Temperature (Sourcing) ©2009-2013 Exar Corporation 7/15 Rev 1A Rev 1A Short Circuit Current vs. Temperature (Sinking) LMV321 General Purpose, Rail-to-Rail Output Amplifier Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Output Voltage Swing vs. Supply Voltage Slew Rate vs. Supply Voltage Ω Ω Vin = 1Vpp CMRR vs. Frequency PSRR vs. Signal Frequency Non-Inverting Non-Inverting Non-Inverting Small Small Small Signal Signal Pulse Pulse Pulse Response Response Response Ω Ω μ Input Voltage Noise vs. Frequency Rev 1A THD vs. Frequency ©2009-2013 Exar Corporation 8/15 LMV321 General Purpose, Rail-to-Rail Output Amplifier Rev 1A Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Open Loop Frequency Response +2.7V Ω Ω Ω OpenNon-Inverting Loop Frequency Response vs. Temperature Non-Inverting Non-Inverting Small Small Small Signal Signal Signal Pulse Pulse Pulse Response Response Response Ω Ω Ω Ω Ω Gain and Phase vs. Capacitive Load RL=600Ω Gain and Phase vs. Capacitive Load RL=100kΩ ©2009-2013 Exar Corporation Ω Ω 9/15 Rev 1A Rev 1A Open Loop Frequency Response 5V Ω) LMV321 General Purpose, Rail-to-Rail Output Amplifier Open Loop Output Impedance vs. Frequency Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Inverting Large Signal Pulse Response Inverting Large Signal Pulse Response μs/div) μs/div) Inverting Large Signal Pulse Response Inverting Small Signal Pulse Response Non-Inverting Non-Inverting Non-Inverting Small Small Small Signal Signal Signal Pulse Pulse Pulse Response Response Response Ω Ω μs/div) Inverting Small Signal Pulse Response Inverting Small Signal Pulse Response Ω Rev 1A μs/div) Ω μs/div) ©2009-2013 Exar Corporation μs/div) 10/15 LMV321 General Purpose, Rail-to-Rail Output Amplifier Ω Ω Rev 1A Data Sheet Typical Performance Characteristics at +5V - Continued TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted. Non-Inverting Large Signal Pulse Response Ω Ω μs/div) μs/div) Non-Inverting Large Signal Pulse Response Non-Inverting Non-Inverting Non-Inverting Small Small Small Signal Signal Signal Pulse Pulse Pulse Response Response Response Ω Ω μs/div) Non-Inverting Small Signal Pulse Response Non-Inverting Small Signal Pulse Response Ω Ω μs/div) μs/div) ©2009-2013 Exar Corporation 11/15 Rev 1A Rev 1A μs/div) LMV321 General Purpose, Rail-to-Rail Output Amplifier Non-Inverting Large Signal Pulse Response Data Sheet Application Information +Vs General Description Input 6.8µF Figure 3. Unity Gain Circuit +Vs 0.1µF Output - RL Rf Rg Figure 4. Single Supply Non-Inverting Gain Circuit RL 6.8µF -Vs Power Dissipation Rf G = 1 + (Rf/Rg) Figure 1. Typical Non-Inverting Gain Circuit +Vs 6.8µF 0.1µF + Output - RL 0.1µF 6.8µF -Vs Power dissipation should not be a factor when operating under the stated 2kΩ load condition. However, applications with low impedance, DC coupled loads should be analyzed to ensure that maximum allowed junction temperature is not exceeded. Guidelines listed below can be used to verify that the particular application will not cause the device to operate beyond it’s intended operating range. Maximum power levels are set by the absolute maximum junction rating of 150°C. To calculate the junction temperature, the package thermal resistance value ThetaJA (ӨJA) is used along with the total die power dissipation. Rf G = - (Rf/Rg) For optimum input offset voltage set R1 = Rf || Rg Figure 2. Typical Inverting Gain Circuit ©2009-2013 Exar Corporation TJunction = TAmbient + (ӨJA × PD) Where TAmbient is the temperature of the working environment. In order to determine PD, the power dissipated in the load needs to be subtracted from the total power delivered by 12/15 Rev 1A Rev 1A Rg Rg + 6.8µF Output 0.1µF Input Input 6.8µF - R1 G=1 -Vs 0.1µF + RL 0.1µF The output stage is short circuit protected and offers “soft” saturation protection that improves recovery time.Figures 1, 2, and 3 illustrate typical circuit configurations for noninverting, inverting, and unity gain topologies for dual supply applications. They show the recommended bypass capacitor values and overall closed loop gain equations. Figure 4 shows the typical non-inverting gain circuit for single supply applications Input Output - The common mode input range extends to 200mV below ground and to 800mV below Vs. Exceeding these values will not cause phase reversal. However, if the input voltage exceeds the rails by more than 0.5V, the input ESD devices will begin to conduct. The output will stay at the rail during this overdrive condition. +Vs 0.1µF + LMV321 General Purpose, Rail-to-Rail Output Amplifier The LMV321 is a single supply, general purpose, voltagefeedback amplifier fabricated on a CMOS process. The LMV321 offers 1MHz gain bandwidth product, >1V/μs slew rate, and only 130μA supply current. It features a rail-to-rail output stage and is unity gain stable. 6.8µF Data Sheet the supplies. Input PD = Psupply - Pload + Supply power is calculated by the standard power equation. - RL || (Rf + Rg) These measurements are basic and are relatively easy to perform with standard lab equipment. For design purposes however, prior knowledge of actual signal levels and load impedance is needed to determine the dissipated power. Here, PD can be found from PD = PQuiescent + PDynamic - PLoad Quiescent power can be derived from the specified IS values along with known supply voltage, VSupply. Load power can be calculated as above with the desired signal amplitudes using: For a given load capacitance, adjust RS to optimize the tradeoff between settling time and bandwidth. In general, reducing RS will increase bandwidth at the expense of additional overshoot and ringing. Overdrive Recovery An overdrive condition is defined as the point when either one of the inputs or the output exceed their specified voltage range. Overdrive recovery is the time needed for the amplifier to return to its normal or linear operating point. The recovery time varies, based on whether the input or output is overdriven and by how much the range is exceeded. The LMV321 and will typically recover in less than 5us from an overdrive condition. Figure 6 shows the LMV321 in an overdriven condition. (VLOAD)RMS = VPEAK / √2 Rev 1A The dynamic power is focused primarily within the output stage driving the load. This value can be calculated as: ( ILOAD)RMS = ( VLOAD)RMS / Rloadeff Ω PDYNAMIC = (VS+ - VLOAD)RMS × ( ILOAD)RMS Assuming the load is referenced in the middle of the power rails or Vsupply/2. The LMV321 is short circuit protected. However, this may not guarantee that the maximum junction temperature (+150°C) is not exceeded under all conditions. μs) Figure 6. Overdrive Recovery Layout Considerations Driving Capacitive Loads Increased phase delay at the output due to capacitive loading can cause ringing, peaking in the frequency response, and possible unstable behavior. Use a series resistance, RS, between the amplifier and the load to help improve stability and settling performance. Refer to Figure 5. ©2009-2013 Exar Corporation General layout and supply bypassing play major roles in high frequency performance. CADEKA has evaluation boards to use as a guide for high frequency layout and as an aid in device testing and characterization. Follow the steps below as a basis for high frequency layout: ▪▪Include 6.8µF and 0.1µF ceramic capacitors for power 13/15 LMV321 General Purpose, Rail-to-Rail Output Amplifier Figure 5. Addition of RS for Driving Capacitive Loads Power delivered to a purely resistive load is: Rloadeff in Figure 3 would be calculated as: RL Rg Vsupply = VS+ - VS- The effective load resistor (Rloadeff) will need to include the effect of the feedback network. For instance, Output CL Rf Psupply = Vsupply × IRMS supply Pload = ((VLOAD)RMS2)/Rloadeff Rs Rev 1A Data Sheet supply decoupling ▪▪Place the 6.8µF capacitor within 0.75 inches of the power pin LMV321 General Purpose, Rail-to-Rail Output Amplifier ▪▪Place the 0.1µF capacitor within 0.1 inches of the power pin ▪▪Remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitance ▪▪Minimize all trace lengths to reduce series inductances Evaluation Board Schematics Evaluation board schematics and layouts are shown in Figures 7-9. These evaluation boards are built for dual supply operation. Follow these steps to use the board in a single-supply application: Figure 8. CEB004 Top View 1. Short -Vs to ground. 2. Use C3 (6.8uF) and C4 (0.1uF), if the -VS pin of the amplifier is not directly connected to the ground plane. +Vs Input Rin 5 1 + 6.8µF 0.1µF Output 4 2 Rg Rout Rev 1A 3 - RL 0.1µF Rf Figure 9. CEB004 Bottom View 6.8µF -Vs Figure 7. CEB004 Schematic ©2009-2013 Exar Corporation 14/15 Rev 1A Data Sheet Mechanical Dimensions TSOT-5 Package LMV321 General Purpose, Rail-to-Rail Output Amplifier NOTE: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. PACKAGE LENGTH DOES NOT INCLUDE INTERLEAD FALSH OR PROTRUSION 3. PACKAGE WIDTH DOES NOTINCLUDE INTERLEAD FALSH OR PROTRUSION. 4. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5. DRAWING CONFROMS TO JEDEC MO-193, VARIATION AA. 6. DRAWING IS NOT TO SCALE. Rev 1A For Further Assistance: Exar Corporation Headquarters and Sales Offices 48720 Kato Road Tel.: +1 (510) 668-7000 Fremont, CA 94538 - USA Fax: +1 (510) 668-7001 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. ©2009-2013 Exar Corporation 15/15 Rev 1A