May 31, 2012 1.4 MHz, Low Power General Purpose, 1.8V Operational Amplifiers General Description Features The LMV611/LMV612/LMV614 are single, dual, and quad low voltage, low power Operational Amplifiers. They are designed specifically for low voltage general purpose applications. Other important product characteristics are, rail to-rail input/output, low supply voltage of 1.8V and wide temperature range. The LMV611/LMV612/LMV614 input common mode extends 200mV beyond the supplies and the output can swing rail-torail unloaded and within 30mV with 2kohm load at 1.8V supply. The LMV611/2/4 achieves a gain bandwidth of 1.4MHz while drawing 100 uA (typ) quiescent current. The industrial-plus temperature range of −40°C to 125°C allows the LMV611/LMV612/LMV614 to accommodate a broad range of extended environment applications. The LMV611 is offered in the tiny 5-Pin SC70 package, the LMV612 in space saving 8-Pin MSOP and SOIC, and the LMV614 in 14-Pin TSSOP and SOIC. These small package amplifiers offer an ideal solution for applications requiring minimum PCB footprint. Applications with area constrained PC board requirements include portable and battery operated electronics. (Typical 1.8V Supply Values; Unless Otherwise Noted) ■ Guaranteed 1.8V, 2.7V and 5V specifications ■ Output swing 80mV from rail — w/600Ω load 30mV from rail — w/2kΩ load 200mV beyond rails ■ VCM 100μA ■ Supply current (per channel) 1.4MHz ■ Gain bandwidth product 4.0mV ■ Maximum VOS −40°C to 125°C ■ Temperature range Applications ■ ■ ■ ■ ■ ■ ■ Consumer communication Consumer computing PDAs Audio pre-amp Portable/battery-powered electronic equipment Supply current monitoring Battery monitoring Typical Application 30185616 © 2012 Texas Instruments Incorporated 301856 SNOSC69A www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad 1.4 MHz, Low Power General Purpose, 1.8V Operational Amplifiers LMV611 Single/LMV612 Dual/ LMV614 Quad LMV611 Single/LMV612 Dual/LMV614 Quad For soldering specifications: see product folder at www.national.com and www.national.com/ms/MS/MS-SOLDERING.pdf Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Machine Model Human Body Model Supply Voltage (V+–V −) Differential Input Voltage Voltage at Input/Output Pins Storage Temperature Range Junction Temperature (Note 4) Operating Ratings (Note 1) Supply Voltage Range Temperature Range 200V 2000V 6V ± Supply Voltage V++0.3V, V- -0.3V −65°C to 150°C 150°C 1.8V to 5.5V −40°C to 125°C Thermal Resistance (θJA) 5-Pin SC70 5-Pin SOT23 8-Pin MSOP 8-Pin SOIC 14-Pin TSSOP 14-Pin SOIC 414°C/W 265°C/W 235°C/W 175°C/W 155°C/W 127°C/W 1.8V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 1.8V, V − = 0V, VCM = V+/2, VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol VOS Parameter Input Offset Voltage Condition Min (Note 6) Typ (Note 5) Max (Note 6) Units mV LMV611 (Single) 1 4 LMV612 (Dual) LMV614 (Quad) 1 5.5 mV TCVOS Input Offset Voltage Average Drift 5.5 μV/°C IB Input Bias Current 15 nA IOS Input Offset Current 13 nA IS Supply Current (per channel) CMRR Common Mode Rejection Ratio LMV611, 0 ≤ VCM ≤ 0.6V 103 60 78 55 76 185 μA 1.4V ≤ VCM ≤ 1.8V (Note 8) LMV612 and LMV614 0 ≤ VCM ≤ 0.6V dB 1.4V ≤ VCM ≤ 1.8V (Note 8) −0.2V ≤ VCM ≤ 0V 50 72 1.8V ≤ VCM ≤ 2.0V PSRR Power Supply Rejection Ratio 1.8V ≤ V+ ≤ 5V CMVR Input Common-Mode Voltage Range For CMRR Range ≥ 50dB 100 TA = 25°C TA −40°C to 85° C TA = 125°C AV VO www.ti.com V− −0.2 −0.2 to 2.1 V+ V− +0.2 V+ −0.2 77 101 RL = 2kΩ to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 80 105 Large Signal Voltage Gain LMV612 (Dual) LMV614 (Quad) RL = 600Ω to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 75 90 RL = 2kΩ to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 78 100 Output Swing RL = 600Ω to 0.9V VIN = ±100mV 1.65 1.72 RL = 2kΩ to 0.9V VIN = ±100mV 1.75 0.077 V dB dB 0.105 1.77 0.024 2 V+ +0.2 V− RL = 600Ω to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V Large Signal Voltage Gain LMV611 (Single) dB 0.035 V IO Parameter Output Short Circuit Current (Note 3) Condition Min (Note 6) Typ (Note 5) Sourcing, VO = 0V VIN = 100mV 8 Sinking, VO = 1.8V VIN = −100mV 9 Max (Note 6) Units mA 1.8V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 1.8V, V − = 0V, VCM = V+/2, VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter Conditions (Note 7) Min (Note 6) Typ (Note 5) Max (Note 6) Units SR Slew Rate 0.35 V/μs GBW Gain-Bandwidth Product 1.4 MHz Φm Phase Margin 67 deg Gm Gain Margin 7 dB en Input-Referred Voltage Noise f = 10 kHz, VCM = 0.5V in Input-Referred Current Noise f = 10 kHz 0.08 THD Total Harmonic Distortion f = 1kHz, AV = +1 0.023 60 RL = 600Ω, VIN = 1 VPP Amp-to-Amp Isolation (Note 9) 123 3 % dB www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad Symbol LMV611 Single/LMV612 Dual/LMV614 Quad 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 2.7V, V − = 0V, VCM = V+/2, VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol VOS Parameter Input Offset Voltage Condition Min (Note 6) Typ (Note 5) Max (Note 6) Units mV LMV611 (Single) 1 4 LMV612 (Dual) LMV614 (Quad) 1 5.5 mV TCVOS Input Offset Voltage Average Drift 5.5 μV/°C IB Input Bias Current 15 nA IOS Input Offset Current 8 nA IS Supply Current (per channel) CMRR Common Mode Rejection Ratio LMV611, 0 ≤ VCM ≤ 1.5V 105 60 81 55 80 190 μA 2.3V ≤ VCM ≤ 2.7V (Note 8) LMV612 and LMV614 0 ≤ VCM ≤ 1.5V dB 2.3V ≤ VCM ≤ 2.7V (Note 8) −0.2V ≤ VCM ≤ 0V 50 74 2.7V ≤ VCM ≤ 2.9V PSRR Power Supply Rejection Ratio 1.8V ≤ V+ ≤ 5V VCM = 0.5V VCM Input Common-Mode Voltage Range For CMRR Range ≥ 50dB 100 TA = 25°C TA = −40°C to 85°C TA = 125°C AV VO IO www.ti.com V− −0.2 −0.2 to 3.0 V+ V− +0.2 V+ −0.2 87 104 RL = 2kΩ to 1.35V, VO = 0.2V to 2.5V 92 110 Large Signal Voltage Gain LMV612 (Dual) LMV614 (Quad) RL = 600Ω to 1.35V, VO = 0.2V to 2.5V 78 90 RL = 2kΩ to 1.35V, VO = 0.2V to 2.5V 81 100 Output Swing RL = 600Ω to 1.35V VIN = ±100mV 2.55 RL = 2kΩ to 1.35V VIN = ±100mV 2.65 Output Short Circuit Current (Note 3) V dB dB 2.62 0.083 0.110 2.675 0.025 Sourcing, VO = 0V VIN = 100mV 30 Sinking, VO = 0V VIN = −100mV 25 4 V+ +0.2 V− RL = 600Ω to 1.35V, VO = 0.2V to 2.5V Large Signal Voltage Gain LMV611 (Single) dB V 0.04 mA Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 2.7V, V − = 0V, VCM = 1.0V, VO = 1.35V and RL > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter Conditions SR Slew Rate GBW Gain-Bandwidth Product (Note 7) Φm Gm en Input-Referred Voltage Noise f = 10 kHz, VCM = 0.5V in Input-Referred Current Noise f = 10 kHz THD Total Harmonic Distortion f = 1kHz, AV = +1 Min (Note 6) Typ (Note 5) Max (Note 6) Units 0.4 V/µs 1.4 MHz Phase Margin 70 deg Gain Margin 7.5 dB 0.08 RL = 600Ω, VIN = 1VPP Amp-to-Amp Isolation 57 (Note 9) 5 0.022 % 123 dB www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad 2.7V AC Electrical Characteristics LMV611 Single/LMV612 Dual/LMV614 Quad 5V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 5V, V − = 0V, VCM = V+/2, VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol VOS Parameter Input Offset Voltage Condition Min (Note 6) Typ (Note 5) Max (Note 6) Units mV LMV611 (Single) 1 4 LMV612 (Dual) LMV614 (Quad) 1 5.5 TCVOS Input Offset Voltage Average Drift 5.5 IB Input Bias Current 14 IOS Input Offset Current 9 IS Supply Current (per channel) CMRR Common Mode Rejection Ratio 0 ≤ VCM ≤ 3.8V 116 60 86 50 78 μV/°C 35 nA nA 210 4.6V ≤ VCM ≤ 5.0V (Note 8) −0.2V ≤ VCM ≤ 0V mV μA dB 5.0V ≤ VCM ≤ 5.2V PSRR Power Supply Rejection Ratio 1.8V ≤ V+ ≤ 5V VCM = 0.5V CMVR Input Common-Mode Voltage Range For CMRR Range ≥ 50dB 100 TA = 25°C TA = −40°C to 85°C TA = 125°C AV VO IO V− −0.2 −0.2 to 5.3 V+ V− +0.3 V+ −0.3 88 102 RL = 2kΩ to 2.5V, VO = 0.2V to 4.8V 94 113 Large Signal Voltage Gain LMV612 (Dual) LMV614 (Quad) RL = 600Ω to 2.5V, VO = 0.2V to 4.8V 81 90 RL = 2kΩ to 2.5V, VO = 0.2V to 4.8V 85 100 Output Swing RL = 600Ω to 2.5V VIN = ±100mV 4.855 4.890 RL = 2kΩ to 2.5V VIN = ±100mV 4.945 Output Short Circuit Current (Note 3) V+ +0.2 V− RL = 600Ω to 2.5V, VO = 0.2V to 4.8V Large Signal Voltage Gain LMV611 (Single) dB 0.120 dB dB 0.160 4.967 0.037 LMV611, Sourcing, VO = 0V VIN = 100mV 100 Sinking, VO = 5V VIN = −100mV 65 V V 0.065 mA 5V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C. V+ = 5V, V − = 0V, VCM = V+/2, VO = 2.5V and R L > 1 MΩ. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter SR Slew Rate GBW Φm Gm www.ti.com Conditions (Note 7) Min (Note 6) Typ (Note 5) Max (Note 6) Units 0.42 V/µs Gain-Bandwidth Product 1.5 MHz Phase Margin 71 deg Gain Margin 8 dB 6 Parameter Conditions Min (Note 6) Typ (Note 5) en Input-Referred Voltage Noise f = 10 kHz, VCM = 1V in Input-Referred Current Noise f = 10 kHz 0.08 THD Total Harmonic Distortion f = 1kHz, AV = +1 0.022 Max (Note 6) 50 RL = 600Ω, VO = 1V PP Amp-to-Amp Isolation Units (Note 9) 123 % dB 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: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150°C. Output currents in excess of 45mA over long term may adversely affect reliability. Note 4: The maximum power dissipation is a function of TJ(MAX), θJA and TA. 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 5: 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 6: All limits are guaranteed by testing or statistical analysis. Note 7: Connected as voltage follower with input step from V− to V+. Number specified is the slower of the positive and negative slew rates. Note 8: For guaranteed temperature ranges, see Input Common-Mode Voltage Range specifications. Note 9: Input referred, RL = 100kΩ connected to V+/2. Each amp excited in turn with 1kHz to produce VO = 3VPP (For Supply Voltages <3V, VO = V+). 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. See Applications section for information of temperature derating of the device. Absolute Maximum Ratings indicated junction temperature limits beyond which the device may be permanently degraded, either mechanically or electrically. 7 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad Symbol LMV611 Single/LMV612 Dual/LMV614 Quad Connection Diagrams 5-Pin SC70-5/SOT23-5 (LMV611) 8-Pin MSOP/SOIC (LMV612) 14-Pin TSSOP/SOIC (LMV614) 30185602 Top View 30185612 30185611 Top View Top View Ordering Information Package 5-Pin SC70 5-Pin SOT23 8-Pin MSOP 8-Pin SOIC 14-Pin TSSOP 14-Pin SOIC www.ti.com Part Number LMV611MG LMV611MGX LMV611MF LMV611MFX LMV612MM LMV612MMX LMV612MA LMV612MAX LMV614MT LMV614MTX LMV614MA LMV614MAX Packaging Marking Transport Media 1k Units Tape and Reel AVA 3k Units Tape and Reel 1k Units Tape and Reel AE9A 3k Units Tape and Reel 1k Units Tape and Reel AD9A 3.5k Units Tape and Reel LMV612MA LMV614MT LMV614MA 8 Rails 2.5k Units Tape and Reel Rails 2.5k Units Tape and Reel Rails 2.5k Units Tape and Reel NSC Drawing MAA05A MF05A MUA08A M08A MTC14 M14A Unless otherwise specified, VS = +5V, single supply, TA = 25°C. Supply Current vs. Supply Voltage (LMV611) Sourcing Current vs. Output Voltage 30185625 30185622 Sinking Current vs. Output Voltage Output Voltage Swing vs. Supply Voltage 30185628 30185649 Output Voltage Swing vs. Supply Voltage Gain and Phase vs. Frequency 30185650 30185614 9 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad Typical Performance Characteristics LMV611 Single/LMV612 Dual/LMV614 Quad Gain and Phase vs. Frequency Gain and Phase vs. Frequency 30185615 30185609 Gain and Phase vs. Frequency CMRR vs. Frequency 30185639 30185610 PSRR vs. Frequency Input Voltage Noise vs. Frequency 30185656 www.ti.com 30185658 10 LMV611 Single/LMV612 Dual/LMV614 Quad Input Current Noise vs. Frequency THD vs. Frequency 30185667 30185666 THD vs. Frequency Slew Rate vs. Supply Voltage 30185669 30185668 Small Signal Non-Inverting Response Small Signal Non-Inverting Response 30185670 30185671 11 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad Small Signal Non-Inverting Response Large Signal Non-Inverting Response 30185673 30185672 Large Signal Non-Inverting Response Large Signal Non-Inverting Response 30185674 30185675 Short Circuit Current vs. Temperature (Sinking) Short Circuit Current vs. Temperature (Sourcing) 30185676 www.ti.com 30185677 12 LMV611 Single/LMV612 Dual/LMV614 Quad Offset Voltage vs. Common Mode Range Offset Voltage vs. Common Mode Range 30185636 30185637 Offset Voltage vs. Common Mode Range 30185638 pendent spurious signal in series with the input signal and can effectively degrade small signal parameters such as gain and common mode rejection ratio. To resolve this problem, the small signal should be placed such that it avoids the VOS crossover point. In addition to the rail-to-rail performance, the output stage can provide enough output current to drive 600Ω loads. Because of the high current capability, care should be taken not to exceed the 150°C maximum junction temperature specification. Application Note INPUT AND OUTPUT STAGE The rail-to-rail input stage of this family provides more flexibility for the designer. The LMV611/LMV612/LMV614 use a complimentary PNP and NPN input stage in which the PNP stage senses common mode voltage near V− and the NPN stage senses common mode voltage near V+. The transition from the PNP stage to NPN stage occurs 1V below V+. Since both input stages have their own offset voltage, the offset of the amplifier becomes a function of the input common mode voltage and has a crossover point at 1V below V+. This VOS crossover point can create problems for both DC and AC coupled signals if proper care is not taken. Large input signals that include the VOS crossover point will cause distortion in the output signal. One way to avoid such distortion is to keep the signal away from the crossover. For example, in a unity gain buffer configuration and with VS = 5V, a 5V peakto-peak signal will contain input-crossover distortion while a 3V peak-to-peak signal centered at 1.5V will not contain inputcrossover distortion as it avoids the crossover point. Another way to avoid large signal distortion is to use a gain of −1 circuit which avoids any voltage excursions at the input terminals of the amplifier. In that circuit, the common mode DC voltage can be set at a level away from the VOS cross-over point. For small signals, this transition in VOS shows up as a VCM de- INPUT BIAS CURRENT CONSIDERATION The LMV611/LMV612/LMV614 family has a complementary bipolar input stage. The typical input bias current (IB) is 15nA. The input bias current can develop a significant offset voltage. This offset is primarily due to IB flowing through the negative feedback resistor, RF. For example, if IB is 50nA and RF is 100kΩ, then an offset voltage of 5mV will develop (VOS = IB x RF). Using a compensation resistor (RC), as shown in Figure 1, cancels this effect. But the input offset current (IOS) will still contribute to an offset voltage in the same manner. 13 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad HALF-WAVE RECTIFIER WITH RAIL-TO-GROUND OUTPUT SWING Since the LMV611/LMV612/LMV614 input common mode range includes both positive and negative supply rails and the output can also swing to either supply, achieving half-wave rectifier functions in either direction is an easy task. All that is needed are two external resistors; there is no need for diodes or matched resistors. The half wave rectifier can have either positive or negative going outputs, depending on the way the circuit is arranged. In Figure 3 the circuit is referenced to ground, while in Figure 4 the circuit is biased to the positive supply. These configurations implement the half wave rectifier since the LMV611/ LMV612/LMV614 can not respond to one-half of the incoming waveform. It can not respond to one-half of the incoming because the amplifier can not swing the output beyond either rail therefore the output disengages during this half cycle. During the other half cycle, however, the amplifier achieves a half wave that can have a peak equal to the total supply voltage. RI should be large enough not to load the LMV611/ LMV612/LMV614. 30185659 FIGURE 1. Canceling the Offset Voltage due to Input Bias Current Typical Applications HIGH SIDE CURRENT SENSING The high side current sensing circuit (Figure 2) is commonly used in a battery charger to monitor charging current to prevent over charging. A sense resistor RSENSE is connected to the battery directly. This system requires an op amp with railto-rail input. The LMV611/LMV612/LMV614 are ideal for this application because its common mode input range goes up to the rail. 30185616 FIGURE 2. High Side Current Sensing www.ti.com 14 30185607 FIGURE 3. Half-Wave Rectifier with Rail-To-Ground Output Swing Referenced to Ground 30185605 30185603 30185604 FIGURE 4. Half-Wave Rectifier with Negative-Going Output Referenced to VCC the input and output are only limited by the supply voltages. Remember that even with rail-to-rail outputs, the output can not swing past the supplies so the combined common mode voltages plus the signal should not be greater that the supplies or limiting will occur. For additional applications, see National Semiconductor application notes AN–29, AN–31, AN–71, and AN–127. INSTRUMENTATION AMPLIFIER WITH RAIL-TO-RAIL INPUT AND OUTPUT Some manufactures make a non-“rail-to-rail”-op amp rail-torail by using a resistive divider on the inputs. The resistors divide the input voltage to get a rail-to-rail input range. The problem with this method is that it also divides the signal, so in order to get the obtained gain, the amplifier must have a higher closed loop gain. This raises the noise and drift by the internal gain factor and lowers the input impedance. Any mismatch in these precision resistors reduces the CMRR as well. The LMV611/LMV612/LMV614 is rail-to-rail and therefore doesn’t have these disadvantages. Using three of the LMV611/LMV612/LMV614 amplifiers, an instrumentation amplifier with rail-to-rail inputs and outputs can be made as shown in Figure 5. In this example, amplifiers on the left side act as buffers to the differential stage. These buffers assure that the input impedance is very high and require no precision matched resistors in the input stage. They also assure that the difference amp is driven from a voltage source. This is necessary to maintain the CMRR set by the matching R1-R2 with R3-R4. The gain is set by the ratio of R2/R1 and R3 should equal R1 and R4 equal R2. With both rail-to-rail input and output ranges, 30185613 FIGURE 5. Rail-to-rail Instrumentation Amplifier 15 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad 30185608 30185606 LMV611 Single/LMV612 Dual/LMV614 Quad Simplified Schematic 30185601 www.ti.com 16 LMV611 Single/LMV612 Dual/LMV614 Quad Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SC70 NS Package Number MAA05A 5-Pin SOT23 NS Package Number MF05A 17 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad 8-Pin MSOP NS Package Number MUA08A 8-Pin SOIC NS Package Number M08A www.ti.com 18 LMV611 Single/LMV612 Dual/LMV614 Quad 14-Pin TSSOP NS Package Number MTC14 14-Pin SOIC NS Package Number M14A 19 www.ti.com LMV611 Single/LMV612 Dual/LMV614 Quad 1.4 MHz, Low Power General Purpose, 1.8V Operational Amplifiers Notes www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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