August 13, 2012 1.8V, RRIO Operational Amplifiers General Description Features The LMV931/LMV932/LMV934 are low voltage, low power operational amplifiers. LMV931/LMV932/LMV934 operate from +1.8V to +5.5V supply voltages and have rail-to-rail input and output. LMV931/LMV932/LMV934 input common mode voltage extends 200mV beyond the supplies which enables user enhanced functionality beyond the supply voltage range. The output can swing rail-to-rail unloaded and within 105mV from the rail with 600 load at 1.8V supply. The LMV931/ LMV932/LMV934 are optimized to work at 1.8V which make them ideal for portable two-cell battery powered systems and single cell Li-Ion systems. LMV931/LMV932/LMV934 exhibit excellent speed-power ratio, achieving 1.4MHz gain bandwidth product at 1.8V supply voltage with very low supply current. The LMV931/LMV932/ LMV934 are capable of driving a 600 load and up to 1000pF capacitive load with minimal ringing. LMV931/LMV932/ LMV934 have a high DC gain of 101dB, making them suitable for low frequency applications. The single LMV931 is offered in space saving 5-Pin SC70 and SOT23 packages. The dual LMV932 are in 8-Pin MSOP and SOIC packages and the quad LMV934 are in 14-Pin TSSOP and SOIC packages. These small packages are ideal solutions for area constrained PC boards and portable electronics such as cellular phones and PDAs. (Typical 1.8V Supply Values; Unless Otherwise Noted) Guaranteed 1.8V, 2.7V and 5V specifications Output swing 80mV from rail -- w/600 load 30mV from rail -- w/2k load 200mV beyond rails VCM 100A Supply current (per channel) 1.4MHz Gain bandwidth product 4.0mV Maximum VOS Ultra tiny packages -40C to 125C Temperature range Applications Consumer communication Consumer computing PDAs Audio pre-amp Portable/battery-powered electronic equipment Supply current monitoring Battery monitoring Typical Application 200326h0 (c) 2012 Texas Instruments Incorporated 200326 SNOS993I www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad 1.8V, RRIO Operational Amplifiers LMV931 Single/LMV932 Dual/ LMV934 Quad LMV931 Single/LMV932 Dual/LMV934 Quad For soldering specifications: See product folder at www.ti.com and www.ti.com/lit/an/ snoa549c/snoa549c.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) Charged Device Model 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 750V 200V 2000V 6V Supply Voltage V++0.3V, V- -0.3V -65C to 150C 150C 1.8V to 5.5V -40C to 125C Thermal Resistance (JA) 5-Pin SC70 5-Pin SOT23 8-Pin MSOP 8-Pin SOIC 14-Pin TSSOP 14-Pin SOIC 414C/W 265C/W 235C/W 175C/W 155C/W 127C/W 1.8V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 1.8V, V - = 0V, VCM = V+/2, VO = V+/2 and RL > 1 M. 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 LMV931 (Single) 1 4 6 mV LMV932 (Dual) LMV934 (Quad) 1 5.5 7.5 mV TCVOS Input Offset Voltage Average Drift 5.5 IB Input Bias Current 15 35 50 nA IOS Input Offset Current 13 25 40 nA IS Supply Current (per channel) 103 185 205 A CMRR Common Mode Rejection Ratio LMV931, 0 VCM 0.6V 60 55 78 76 0 VCM 0.6V 55 50 -0.2V VCM 0V 50 72 75 70 100 V- -0.2 -0.2 to 2.1 1.4V VCM 1.8V (Note 8) LMV932 and LMV934 V/C dB 1.4V VCM 1.8V (Note 8) 1.8V VCM 2.0V PSRR Power Supply Rejection Ratio 1.8V V+ 5V CMVR Input Common-Mode Voltage Range For CMRR Range 50dB TA = 25C TA -40C to 85 C TA = 125C AV Large Signal Voltage Gain LMV931 (Single) Large Signal Voltage Gain LMV932 (Dual) LMV934 (Quad) www.ti.com V- V+ +0.2 V+ V- +0.2 V V+ -0.2 RL = 600 to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 77 73 101 RL = 2k to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 80 75 105 RL = 600 to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 75 72 90 RL = 2k to 0.9V, VO = 0.2V to 1.6V, VCM = 0.5V 78 75 100 2 dB dB dB VO Parameter Output Swing Condition RL = 600 to 0.9V VIN = 100mV Min (Note 6) Typ (Note 5) 1.65 1.63 1.72 0.077 1.75 1.74 RL = 2k to 0.9V VIN = 100mV Output Short Circuit Current (Note 3) 0.105 0.120 1.77 0.024 IO Max (Note 6) Sourcing, VO = 0V VIN = 100mV 4 3.3 8 Sinking, VO = 1.8V VIN = -100mV 7 5 9 Units V 0.035 0.04 mA 1.8V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 1.8V, V - = 0V, VCM = V+/2, VO = V+/2 and RL > 1 M. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter SR Slew Rate GBW Conditions (Note 7) Min (Note 6) Typ (Note 5) Max (Note 6) Units 0.35 V/s Gain-Bandwidth Product 1.4 MHz m 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 = 600, VIN = 1 VPP Amp-to-Amp Isolation (Note 9) 123 3 % dB www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad Symbol LMV931 Single/LMV932 Dual/LMV934 Quad 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 2.7V, V - = 0V, VCM = V+/2, VO = V+/2 and RL > 1 M. 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 LMV931 (Single) 1 4 6 mV LMV932 (Dual) LMV934 (Quad) 1 5.5 7.5 mV TCVOS Input Offset Voltage Average Drift 5.5 IB Input Bias Current 15 35 50 nA IOS Input Offset Current 8 25 40 nA IS Supply Current (per channel) 105 190 210 A CMRR Common Mode Rejection Ratio LMV931, 0 VCM 1.5V 60 55 81 55 50 80 0 VCM 1.5V -0.2V VCM 0V 50 74 75 70 100 V- -0.2 -0.2 to 3.0 2.3V VCM 2.7V (Note 8) LMV932 and LMV934 V/C dB 2.3V VCM 2.7V (Note 8) 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 TA = 25C TA = -40C to 85C TA = 125C AV VO V+ V- +0.2 V+ -0.2 87 86 104 RL = 2k to 1.35V, VO = 0.2V to 2.5V 92 91 110 Large Signal Voltage Gain LMV932 (Dual) LMV934 (Quad) RL = 600 to 1.35V, VO = 0.2V to 2.5V 78 75 90 RL = 2k to 1.35V, VO = 0.2V to 2.5V 81 78 100 Output Swing RL = 600 to 1.35V VIN = 100mV 2.55 2.53 2.62 0.083 2.65 2.64 RL = 2k to 1.35V VIN = 100mV www.ti.com Output Short Circuit Current (Note 3) Sourcing, VO = 0V VIN = 100mV 20 15 30 Sinking, VO = 0V VIN = -100mV 18 12 25 4 V dB dB 0.110 0.130 2.675 0.025 IO V+ +0.2 V- RL = 600 to 1.35V, VO = 0.2V to 2.5V Large Signal Voltage Gain LMV931 (Single) dB V 0.04 0.045 mA Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 2.7V, V - = 0V, VCM = 1.0V, VO = 1.35V and RL > 1 M. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter Conditions SR Slew Rate GBW Gain-Bandwidth Product (Note 7) m 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/s 1.4 MHz Phase Margin 70 deg Gain Margin 7.5 dB 0.08 RL = 600, VIN = 1VPP Amp-to-Amp Isolation 57 (Note 9) 5 0.022 % 123 dB www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad 2.7V AC Electrical Characteristics LMV931 Single/LMV932 Dual/LMV934 Quad 5V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 5V, V - = 0V, VCM = V+/2, VO = V+/2 and RL > 1 M. 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 LMV931 (Single) 1 4 6 mV LMV932 (Dual) LMV934 (Quad) 1 5.5 7.5 mV TCVOS Input Offset Voltage Average Drift 5.5 IB Input Bias Current 14 35 50 nA IOS Input Offset Current 9 25 40 nA IS Supply Current (per channel) 116 210 230 A CMRR Common Mode Rejection Ratio 0 VCM 3.8V 60 55 86 -0.2V VCM 0V 50 78 75 70 100 V- -0.2 -0.2 to 5.3 4.6V VCM 5.0V (Note 8) V/C 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 TA = 25C TA = -40C to 85C TA = 125C AV VO V+ V- +0.3 V+ -0.3 88 87 102 RL = 2k to 2.5V, VO = 0.2V to 4.8V 94 93 113 Large Signal Voltage Gain LMV932 (Dual) LMV934 (Quad) RL = 600 to 2.5V, VO = 0.2V to 4.8V 81 78 90 RL = 2k to 2.5V, VO = 0.2V to 4.8V 85 82 100 Output Swing RL = 600 to 2.5V VIN = 100mV 4.855 4.835 4.890 0.120 4.945 4.935 RL = 2k to 2.5V VIN = 100mV www.ti.com Output Short Circuit Current (Note 3) LMV931, Sourcing, VO = 0V VIN = 100mV 80 68 100 Sinking, VO = 5V VIN = -100mV 58 45 65 6 V dB dB 0.160 0.180 4.967 0.037 IO V+ +0.2 V- RL = 600 to 2.5V, VO = 0.2V to 4.8V Large Signal Voltage Gain LMV931 (Single) dB V 0.065 0.075 mA Unless otherwise specified, all limits guaranteed for TJ = 25C. V+ = 5V, V - = 0V, VCM = V+/2, VO = 2.5V and R L > 1 M. Boldface limits apply at the temperature extremes. See (Note 10) Symbol Parameter Conditions Min (Note 6) (Note 7) Typ (Note 5) Max (Note 6) Units SR Slew Rate 0.42 V/s GBW Gain-Bandwidth Product 1.5 MHz m Phase Margin 71 deg Gm Gain Margin 8 dB 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 50 RL = 600, VO = 1V PP Amp-to-Amp Isolation (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 150C. 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), JA and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/ JA. 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 = 100k 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 LMV931 Single/LMV932 Dual/LMV934 Quad 5V AC Electrical Characteristics LMV931 Single/LMV932 Dual/LMV934 Quad Connection Diagrams 5-Pin SC70-5/SOT23-5 (LMV931) 8-Pin MSOP/SOIC (LMV932) 14-Pin TSSOP/SOIC (LMV934) 200326ao Top View 200326g13 200326g12 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 LMV931MG LMV931MGX LMV931MF LMV931MFX LMV932MM LMV932MMX LMV932MA LMV932MAX LMV934MT LMV934MTX LMV934MA LMV934MAX Packaging Marking A74 A79A A86A LMV932MA LMV934MT LMV934MA 8 Transport Media 1k Units Tape and Reel 3k Units Tape and Reel 1k Units Tape and Reel 3k Units Tape and Reel 1k Units Tape and Reel 3.5k Units Tape and Reel 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 = 25C. Supply Current vs. Supply Voltage (LMV931) Sourcing Current vs. Output Voltage 20032625 20032622 Sinking Current vs. Output Voltage Output Voltage Swing vs. Supply Voltage 20032628 20032649 Output Voltage Swing vs. Supply Voltage Gain and Phase vs. Frequency 20032650 200326g8 9 www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad Typical Performance Characteristics LMV931 Single/LMV932 Dual/LMV934 Quad Gain and Phase vs. Frequency Gain and Phase vs. Frequency 200326g9 200326g10 Gain and Phase vs. Frequency CMRR vs. Frequency 20032639 200326g11 PSRR vs. Frequency Input Voltage Noise vs. Frequency 20032656 www.ti.com 20032658 10 LMV931 Single/LMV932 Dual/LMV934 Quad Input Current Noise vs. Frequency THD vs. Frequency 20032667 20032666 THD vs. Frequency Slew Rate vs. Supply Voltage 20032669 20032668 Small Signal Non-Inverting Response Small Signal Non-Inverting Response 20032670 20032671 11 www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad Small Signal Non-Inverting Response Large Signal Non-Inverting Response 20032673 20032672 Large Signal Non-Inverting Response Large Signal Non-Inverting Response 20032674 20032675 Short Circuit Current vs. Temperature (Sinking) Short Circuit Current vs. Temperature (Sourcing) 20032676 www.ti.com 20032677 12 LMV931 Single/LMV932 Dual/LMV934 Quad Offset Voltage vs. Common Mode Range Offset Voltage vs. Common Mode Range 20032636 20032637 Offset Voltage vs. Common Mode Range 20032638 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 600 loads. Because of the high current capability, care should be taken not to exceed the 150C 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 LMV931/LMV932/LMV934 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 LMV931/LMV932/LMV934 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 100k, 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 LMV931 Single/LMV932 Dual/LMV934 Quad HALF-WAVE RECTIFIER WITH RAIL-TO-GROUND OUTPUT SWING Since the LMV931/LMV932/LMV934 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 LMV931/ LMV932/LMV934 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 LMV931/ LMV932/LMV934. 20032659 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 LMV931/LMV932/LMV934 are ideal for this application because its common mode input range goes up to the rail. 200326h0 FIGURE 2. High Side Current Sensing www.ti.com 14 200326c3 FIGURE 3. Half-Wave Rectifier with Rail-To-Ground Output Swing Referenced to Ground 200326c1 200326b9 200326c0 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 LMV931/LMV932/LMV934 is rail-to-rail and therefore doesn't have these disadvantages. Using three of the LMV931/LMV932/LMV934 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, 200326g4 FIGURE 5. Rail-to-rail Instrumentation Amplifier 15 www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad 200326c4 200326c2 LMV931 Single/LMV932 Dual/LMV934 Quad Simplified Schematic 200326a9 www.ti.com 16 LMV931 Single/LMV932 Dual/LMV934 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 LMV931 Single/LMV932 Dual/LMV934 Quad 8-Pin MSOP NS Package Number MUA08A 8-Pin SOIC NS Package Number M08A www.ti.com 18 LMV931 Single/LMV932 Dual/LMV934 Quad 14-Pin TSSOP NS Package Number MTC14 14-Pin SOIC NS Package Number M14A 19 www.ti.com LMV931 Single/LMV932 Dual/LMV934 Quad 1.8V, RRIO Operational Amplifiers Notes www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. 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