Product Folder Sample & Buy Tools & Software Technical Documents Support & Community LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 LMV33x-N / LMV393-N General-Purpose, Low-Voltage, Tiny Pack Comparators 1 Features • • • • • 1 • • • (For 5-V Supply, Typical Unless Otherwise Noted) Ensured 2.7-V and 5-V Performance Industrial Temperature Range −40°C to 85°C Low Supply Current 60 µA/Channel Input Common Mode Voltage Range Includes Ground Low Output Saturation Voltage 200 mV Propagation Delay 200 ns Space-Saving 5-Pin SC70 and 5-Pin SOT23 Packages The LMV393-N is available in 8-pin SOIC and VSSOP packages. The LMV339-N is available in 14pin SOIC and TSSOP packages. The LMV331-N/393-N/339-N is the most costeffective solution where space, low voltage, low power, and price are the primary specification in circuit design for portable consumer products. They offer specifications that meet or exceed the familiar LM393/339 at a fraction of the supply current. The chips are built with TI's advanced Submicron Silicon-Gate BiCMOS process. The LMV331-N/393N/339-N have bipolar input and output stages for improved noise performance. 2 Applications • • • • • Mobile Communications Notebooks and PDAs Battery-Powered Electronics General-Purpose Portable Devices General-Purpose, Low-Voltage Applications 3 Description Table 1. Device Information(1) PART NUMBER LMV331-N LMV339-N LMV393-N PACKAGE BODY SIZE (NOM) SC70 (5) 2.00 mm × 1.25 mm SOT-23 (5) 2.90 mm × 1.6 mm SOIC (14) 8.65 mm × 3.91 mm TSSOP (14) 5.00 mm × 4.40 mm SOIC (8) 4.90 mm × 3.91 mm VSSOP (8) 3.00 mm × 3.00 mm The LMV393-N and LMV339-N are low-voltage (2.7 to 5 V) versions of the dual and quad comparators, LM393/339, which are specified at 5 to 30 V. The LMV331-N is the single version, which is available in space-saving, 5-pin SC70 and 5-pin SOT23 packages. The 5-pin SC70 is approximately half the size of the 5-pin SOT23. (1) For all available packages, see the orderable addendum at the end of the datasheet. Low Supply Current Fast Response Time 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 4 4 4 4 4 5 5 6 7 Absolute Maximum Ratings ..................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. 2.7-V DC Electrical Characteristics........................... 2.7-V AC Electrical Characteristics ........................... 5-V DC Electrical Characteristics.............................. 5-V AC Electrical Characteristics .............................. Typical Characteristics .............................................. Detailed Description .............................................. 9 7.1 Overview ................................................................... 9 7.2 Functional Block Diagram ......................................... 9 7.3 Feature Description................................................... 9 7.4 Device Functional Modes.......................................... 9 8 Application and Implementation ........................ 10 8.1 Application Information............................................ 10 8.2 Typical Applications ................................................ 16 9 Power Supply Recommendations...................... 21 10 Layout................................................................... 21 10.1 Layout Guidelines ................................................. 21 10.2 Layout Example .................................................... 22 11 Device and Documentation Support ................. 23 11.1 11.2 11.3 11.4 11.5 11.6 Device Support...................................................... Documentation Support ........................................ Related Links ........................................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 23 23 23 23 23 23 12 Mechanical, Packaging, and Orderable Information ........................................................... 23 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision G (Feburary 2013) to Revision H • 2 Page Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 5 Pin Configuration and Functions DCK and DBV Package 5-Pin SC70 / SOT23 Top View D and DGK Package 8-Pin SOIC / VSSOP Top View D and PW Package 14-Pin SOIC / TSSOP Top View Pin Functions PIN NAME LMV331-N DVB,DCK LMV393-N D,DGK LMV339-N PW TYPE DESCRIPTION +IN 1 - - I Noninverting input +IN A - 3 5 I Noninverting input, channel A +IN B - 5 7 I Noninverting input, channel B +IN C - - 9 I Noninverting input, channel C +IN D - - 11 I Noninverting input, channel D -IN 3 - - I Inverting input -IN A - 2 4 I Inverting input, channel A -IN B - 6 6 I Inverting input, channel B -IN C - - 8 I Inverting input, channel C -IN D - - 10 I Inverting input, channel D OUT 4 - - O Output OUT A - 1 2 O Output, channel A OUT B - 7 1 O Output, channel B OUT C - - 14 O Output, channel C OUT D - - 13 O Output, channel D V+ 5 8 3 P Positive (highest) power supply V- 2 4 12 P Negative (lowest) power supply Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 3 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) (2) MIN Differential Input Voltage MAX UNIT ±Supply Voltage Voltage on any pin (referred to V− pin) 5.5 V 235 °C 150 °C 150 °C Soldering Information Infrared or Convection (20 sec) Junction Temperature (3) −65 Storage temperature, Tstg (1) (2) (3) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office / Distributors for availability and specifications. 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. 6.2 ESD Ratings VALUE V(ESD) (1) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±800 Machine model ±120 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) MIN Supply Voltage Temperature Range (1) (2) (2) MAX UNIT 2.7 5 V −40 85 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 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. 6.4 Thermal Information LMV331-N THERMAL METRIC (1) RθJA (1) Junction-to-ambient thermal resistance LMV339-N LMV393-N DCK DBV D PW D DGK 5 PINS 5 PINS 14 PINS 14 PINS 8 PINS 8 PINS 478 265 145 155 190 23 UNIT °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 6.5 2.7-V DC Electrical Characteristics Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 2.7V, V− = 0V. PARAMETER TEST CONDITIONS VOS Input Offset Voltage TCVOS Input Offset Voltage Average Drift (1) (2) 4 MIN (1) At the temperature extremes TYP MAX 1.7 7 (2) 5 (1) UNIT mV µV/°C All limits are ensured by testing or statistical analysis. 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 ensured on shipped production material. Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 2.7-V DC Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 2.7V, V− = 0V. PARAMETER IB TEST CONDITIONS MIN (1) TYP MAX 10 250 (2) Input Bias Current At the temperature extremes IOS UNIT nA 400 Input Offset Current 5 At the temperature extremes VCM (1) 50 nA 150 Input Voltage Range −0.1 V 2.0 V 120 mV VSAT Saturation Voltage ISINK ≤ 1 mA IO Output Sink Current VO ≤ 1.5V IS Supply Current LMV331-N 40 100 µA LMV393-N Both Comparators 70 140 µA 140 200 µA 5 23 LMV339-N All four Comparators Output Leakage Current mA .003 At the temperature extremes µA 1 6.6 2.7-V AC Electrical Characteristics TJ = 25°C, V+ = 2.7 V, RL = 5.1 kΩ, V− = 0 V. PARAMETER tPHL Propagation Delay (High to Low) tPLH (1) (2) TEST CONDITIONS Propagation Delay (Low to High) MIN (1) TYP MAX (2) (1) UNIT Input Overdrive = 10 mV 1000 ns Input Overdrive = 100 mV 350 ns Input Overdrive = 10 mV 500 ns Input Overdrive = 100 mV 400 ns All limits are ensured by testing or statistical analysis. 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 ensured on shipped production material. 6.7 5-V DC Electrical Characteristics Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 5 V, V− = 0 V. PARAMETER VOS TEST CONDITIONS MIN (1) Input Offset Voltage TYP MAX 1.7 7 (2) At the temperature extremes TCVOS Input Offset Voltage Average Drift IB Input Bias Current 5 25 2 At the temperature extremes Input Voltage Range AV Voltage Gain mV µV/°C 250 nA 400 Input Offset Current VCM UNIT 9 At the temperature extremes IOS (1) 50 nA 150 −0.1 V 4.2 (1) (2) 20 50 V V/mV All limits are ensured by testing or statistical analysis. 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 ensured on shipped production material. Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 5 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com 5-V DC Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 5 V, V− = 0 V. PARAMETER Vsat TEST CONDITIONS MIN (1) ISINK ≤ 4 mA Saturation Voltage TYP MAX 200 400 (2) At the temperature extremes (1) 700 IO Output Sink Current VO ≤ 1.5V 84 10 IS Supply Current LMV331-N 60 120 At the temperature extremes 150 LMV393-N Both Comparators 100 UNIT mV mA µA 200 µA At the temperature extremes 250 LMV339-N All four Comparators 170 300 µA At the temperature extremes 350 Output Leakage Current .003 At the temperature extremes 1 µA 6.8 5-V AC Electrical Characteristics TJ = 25°C, V+ = 5 V, RL = 5.1 kΩ, V− = 0 V. PARAMETER TEST CONDITIONS tPHL Propagation Delay (High to Low) tPLH Propagation Delay (Low to High) (1) (2) 6 MIN (1) TYP (2) MAX (1) UNIT Input Overdrive = 10 mV 600 ns Input Overdrive = 100 mV 200 ns Input Overdrive = 10 mV 450 ns Input Overdrive = 100 mV 300 ns All limits are ensured by testing or statistical analysis. 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 ensured on shipped production material. Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 6.9 Typical Characteristics Unless otherwise specified, VS = +5V, single supply, TA = 25°C Figure 1. Supply Current vs. Supply Voltage Output High (LMV331-N) Figure 2. Supply Current vs. Supply Voltage Output Low (LMV331-N) 500 -40°C 400 VSAT (mV) 85°C 300 25°C 200 100 0 0 1 2 3 4 5 6 7 8 9 10 ISINK (mA) Figure 3. Output Voltage vs. Output Current at 5-V Supply Figure 4. Output Voltage vs. Output Current at 2.7-V Supply Figure 5. Input Bias Current vs. Supply Voltage Figure 6. Response Time vs. Input Overdrive Negative Transition Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 7 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Typical Characteristics (continued) Unless otherwise specified, VS = +5V, single supply, TA = 25°C Figure 7. Response Time for Input Overdrive Positive Transition Figure 8. Response Time vs. Input Overdrive Negative Transition Figure 9. Response Time for Input Overdrive Positive Transition 8 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 7 Detailed Description 7.1 Overview The LMV331-N/393-N/339-N comparators features a supply voltage range of 2.7 V to 5 V with a low supply current of 55 μA/channel with propagation delays as low as 200ns. They are avaialble in small, space-saving packages, which makes these comparators versatile for use in a wide range of applications, from portable to industrial. The open collector output configuration allows the device to be used in wired-OR configurations, such as a window comparators. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Open Collector Output The output of the LMV331-N/393-N/339-N series is the uncommitted collector of a grounded-emitter NPN output transistor, which requires a pull-up resistor to a positive supply voltage for the output to switch properly. Many collectors can be tied together to provide an output OR’ing function. An output pull-up resistor can be connected to any available power supply voltage within the permitted V+ supply voltage range. The output pull-up resistor should be chosen high enough so as to avoid excessive power dissipation yet low enough to supply enough drive to switch whatever load circuitry is used on the comparator output. On the LMV331-N/393-N/339-N the pullup resistor should range between 1 k to 10 kΩ. 7.3.2 Ground Sensing Input The LMV331-N/393-N/339-N has a typical input common mode voltage range of −0.1V below the ground to 0.8V below Vcc. 7.4 Device Functional Modes A basic comparator circuit is used for converting analog signals to a digital output. The output is HIGH when the voltage on the non-inverting (+IN) input is greater than the inverting (-IN) input. The output is LOW when the voltage on the non-inverting (+IN) input is less than the inverting (-IN) input. The inverting input (-IN) is also commonly referred to as the "reference" or "VREF" input. Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 9 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information 8.1.1 Basic Comparator The comparator compares the input voltage (VIN) at the non-inverting pin to the reference voltage (VREF) at the inverting pin. If VIN is less than VREF, the output voltage (VO) is at the saturation voltage. On the other hand, if VIN is greater than VREF, the output voltage (VO) is at VCC. Figure 10. Basic Comparator 8.1.2 Comparator With Hysteresis The basic comparator configuration may oscillate or produce a noisy output if the applied differential input voltage is near the comparator's offset voltage. This usually happens when the input signal is moving very slowly across the switching threshold of the comparator. This problem can be prevented by the addition of hysteresis or positive feedback. 8.1.2.1 Inverting Comparator With Hysteresis The inverting comparator with hysteresis requires a three resistor network that are referenced to the supply voltage VCC of the comparator. When Vin at the inverting input is less than Va, the voltage at the non-inverting node of the comparator (Vin < Va), the output voltage is high (for simplicity assume VO switches as high as VCC). The three network resistors can be represented as R1//R3 in series with R2. The lower input trip voltage Va1 is defined as: (1) When Vin is greater than Va (Vin > Va), the output voltage is low very close to ground. In this case the three network resistors can be presented as R2//R3 in series with R1. The upper trip voltage Va2 is defined as: (2) 10 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 Application Information (continued) The total hysteresis provided by the network is defined as: ΔVa = Va1 - Va2 (3) To assure that the comparator will always switch fully to VCC and not be pulled down by the load the resistors values should be chosen as follow: RPULL-UP << RLOAD and R1 > RPULL-UP. (4) (5) Figure 11. Inverting Comparator With Hysteresis 8.1.2.1.1 Non-inverting Comparator With Hysteresis Non-inverting comparator with hysteresis requires a two resistor network, and a voltage reference (Vref) at the inverting input. When Vin is low, the output is also low. For the output to switch from low to high, Vin must rise up to Vin1 where Vin1 is calculated by: (6) When Vin is high, the output is also high. To make the comparator switch back to its low state, Vin must equal Vref before VA will again equal Vref. Vin can be calculated by: (7) The hysteresis of this circuit is the difference between Vin1 and Vin2. Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 11 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Application Information (continued) ΔVin = VCCR1/R2 (8) Figure 12. Noninverting Comparator With Hystersis Figure 13. Hysteresis Threshold Points 8.1.3 ORing the Output By the inherit nature of an open-collector comparator, the outputs of several comparators can be tied together with a shared pull-up resistor to VCC. If one or more of the comparators outputs goes low, the output VO will go low. 12 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 Application Information (continued) Figure 14. ORing the Outputs 8.1.4 Driving CMOS and TTL The output of the comparator is capable of driving CMOS and TTL Logic circuits. The pull-up resistor may be pulled-up to any voltage equal to, or less than the supply voltage on V+. However, it must not be pulled-up to a voltage higher than V+. Figure 15. Driving CMOS Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 13 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Application Information (continued) Figure 16. Driving TTL 8.1.5 AND Gates The comparator can be used as three input AND gate. The operation of the gate is as follows: The resistor divider at the inverting input establishes a reference voltage at that node. The non-inverting input is the sum of the voltages at the inputs divided by the voltage dividers. The output will go high only when all three inputs are high, casing the voltage at the non-inverting input to go above that at inverting input. The circuit values shown work for a 0 equal to ground and a 1 equal to 5 V. The resistor values can be altered if different logic levels are desired. If more inputs are required, diodes are recommended to improve the voltage margin when all but one of the inputs are high. Figure 17. AND Gate 8.1.6 OR Gates A three input OR gate is achieved from the basic AND gate simply by increasing the resistor value connected from the inverting input to Vcc, thereby reducing the reference voltage. A logic 1 at any of the inputs will produce a logic 1 at the output. 14 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 Application Information (continued) Figure 18. OR Gate 8.1.7 Large Fan-In Gate Extra logic inputs may be added by ORing the input with multiple diodes. Figure 19. Large Fan-In and Gate Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 15 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com 8.2 Typical Applications 8.2.1 Squarewave Oscillator Figure 20. Squarewave Oscillator 8.2.1.1 Design Requirements Comparators are ideal for oscillator applications. This square wave generator uses the minimum number of components. The output frequency is set by the RC time constant of the capacitor C1 and the resistor in the negative feedback R4. The maximum frequency is limited only by the large signal propagation delay of the comparator in addition to any capacitive loading at the output, which would degrade the output slew rate. 8.2.1.2 Detailed Design Procedure Figure 21. Squarewave Oscillator Timing Thresholds To analyze the circuit, assume that the output is initially high. For this to be true, the voltage at the inverting input Vc has to be less than the voltage at the non-inverting input Va. For Vc to be low, the capacitor C1 has to be discharged and will charge up through the negative feedback resistor R4. When it has charged up to value equal to the voltage at the positive input Va1, the comparator output will switch. Va1 will be given by: (9) 16 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 Typical Applications (continued) If: R1 = R2 = R3 (10) Then: Va1 = 2VCC/3 (11) When the output switches to ground, the value of Va is reduced by the hysteresis network to a value given by: Va2 = VCC/3 (12) Capacitor C1 must now discharge through R4 towards ground. The output will return to its high state when the voltage across the capacitor has discharged to a value equal to Va2. For the circuit shown, the period for one cycle of oscillation will be twice the time it takes for a single RC circuit to charge up to one half of its final value. The time to charge the capacitor can be calculated from: (13) Where Vmax is the max applied potential across the capacitor = (2VCC/3) and VC = Vmax/2 = VCC/3 One period will be given by: 1/freq = 2t (14) or calculating the exponential gives: 1/freq = 2(0.694) R4 C1 (15) Resistors R3 and R4 must be at least two times larger than R5 to ensure that VO will go all the way up to VCC in the high state. The frequency stability of this circuit should strictly be a function of the external components. 8.2.1.3 Application Curve 5.0 4.5 VOUT 4.0 VOUT (V) 3.5 3.0 Va 2.5 2.0 1.5 1.0 Vc 0.5 0.0 0 5 10 15 20 25 30 35 TIME (µs) 40 C001 Figure 22. Waveforms for Circuit in Typical Applications Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 17 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Typical Applications (continued) 8.2.2 Crystal Controlled Oscillator Figure 23. Crystal Controlled Oscillator A simple yet very stable oscillator that generates a clock for slower digital systems can be obtained by using a resonator as the feedback element. It is similar to the squarewave oscillator, except that the positive feedback is obtained through a quartz crystal. The circuit oscillates when the transmission through the crystal is at a maximum, so the crystal in its series-resonant mode. The value of R1 and R2 are equal so that the comparator will switch symmetrically about +VCC/2. The RC constant of R3 and C1 is set to be several times greater than the period of the oscillating frequency, insuring a 50% duty cycle by maintaining a DC voltage at the inverting input equal to the absolute average of the output waveform. When specifying the crystal, be sure to order series resonant with the desired temperature coefficient. 18 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 Typical Applications (continued) 8.2.3 Pulse Generator With Variable Duty Cycle Figure 24. Pulse Generator With Variable Duty Cycle The pulse generator with variable duty cycle is just a minor modification of the basic square wave generator. Providing a separate charge and discharge path for capacitor C1generates a variable duty cycle. One path, through R2 and D2 will charge the capacitor and set the pulse width (t1). The other path, R1 and D1 will discharge the capacitor and set the time between pulses (t2). By varying resistor R1, the time between pulses of the generator can be changed without changing the pulse width. Similarly, by varying R2, the pulse width will be altered without affecting the time between pulses. Both controls will change the frequency of the generator. The pulse width and time between pulses can be found from: (16) Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 19 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com Typical Applications (continued) Solving these equations for t1 and t2 t1 = R4C1ln2 t2 = R5C1ln2 (17) (18) These terms will have a slight error due to the fact that Vmax is not exactly equal to 2/3 VCC but is actually reduced by the diode drop to: (19) (20) (21) 8.2.4 Positive Peak Detector Figure 25. Positive Peak Detector Positive peak detector is basically the comparator operated as a unit gain follower with a large holding capacitor from the output to ground. Additional transistor is added to the output to provide a low impedance current source. When the output of the comparator goes high, current is passed through the transistor to charge up the capacitor. The only discharge path will be the 1-MΩ resistor shunting C1 and any load that is connected to the output. The decay time can be altered simply by changing the 1-MΩ resistor. The output should be used through a high impedance follower to a avoid loading the output of the peak detector. 8.2.5 Negative Peak Detector Figure 26. Negative Peak Detector For the negative detector, the output transistor of the comparator acts as a low impedance current sink. The only discharge path will be the 1-MΩ resistor and any load impedance used. Decay time is changed by varying the 1MΩ resistor. 20 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 9 Power Supply Recommendations The TLV170x is specified for operation from 2.2 V to 36 V (±1.1 to ±18 V); many specifications apply from –40°C to +125°C. Parameters that can exhibit significant variance with regard to operating voltage or temperature are presented in the Typical Characteristics. CAUTION Supply voltages larger than 5.5 V can permanently damage the device; see the Specifications section. Place 0.1-μF bypass capacitors close to the power-supply pins to reduce errors coupling in from noisy or high impedance power supplies. For more detailed information on bypass capacitor placement, refer to the Layout Guidelines section 10 Layout 10.1 Layout Guidelines Comparators are very sensitive to input noise. For best results, the following layout guidelines should be maintained: • Use a printed circuit board (PCB) with a good, unbroken low-inductance ground plane. Proper grounding (use of ground plane) helps maintain specified performance of the comparator • Connect low-ESR, 0.1-μF ceramic bypass capacitors between each supply pin and ground, placed as close to the device as possible. A single bypass capacitor from V+ to ground is applicable for single supply applications. • Separate grounding for analog and digital portions of circuitry is one of the simplest and most-effective methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to ground planes. A ground plane helps distribute heat and reduces EMI noise pickup. Make sure to physically separate digital and analog grounds paying attention to the flow of the ground current. For more detailed information refer to SLOA089, Circuit Board Layout Techniques. • In order to reduce parasitic coupling, run the input traces as far away from the supply or output traces as possible. If it is not possible to keep them separate, it is much better to cross the sensitive trace perpendicular as opposed to in parallel with the noisy trace. • Place the external components as close to the device as possible, as shown in Layout Example. • Keep the length of input traces as short as possible. Always remember that the input traces are the most sensitive part of the circuit. • For slow-moving input signals, take care to prevent parasitic feedback. A small capacitor (1000 pF or less) placed between the inputs can help eliminate oscillations in the transition region. This capacitor causes some degradation to propagation delay when the impedance is low. Run the topside ground plane between the output and inputs. Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 21 LMV331-N, LMV339-N, LMV393-N SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 www.ti.com 10.2 Layout Example V+ IN+ + OUT INV(Schematic Representation) Run the input traces as far away from the supply lines as possible Use low-ESR, ceramic bypass capacitor VS+ IN+ IN+ GND V+ VS± or GND V± OUT IN- OUT IN- GND Only needed for dual-supply operation Figure 27. Comparator Board Layout 22 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N LMV331-N, LMV339-N, LMV393-N www.ti.com SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014 11 Device and Documentation Support 11.1 Device Support 11.1.1 Development Support LMV331-N PSPICE Model, SNOM073 LMV339-N PSPICE Model, SNOM074 LMV393-N PSPICE Model, SNOM059 TINA-TI SPICE-Based Analog Simulation Program, http://www.ti.com/tool/tina-ti DIP Adapter Evaluation Module, http://www.ti.com/tool/dip-adapter-evm TI Universal Operational Amplifier Evaluation Module, http://www.ti.com/tool/opampevm 11.2 Documentation Support 11.2.1 Related Documentation AN-74 - A Quad of Independently Functioning Comparators, SNOA654 11.3 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 2. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LMV331-N Click here Click here Click here Click here Click here LMV339-N Click here Click here Click here Click here Click here LMV393-N Click here Click here Click here Click here Click here 11.4 Trademarks All trademarks are the property of their respective owners. 11.5 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 11.6 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N Submit Documentation Feedback 23 PACKAGE OPTION ADDENDUM www.ti.com 4-Aug-2015 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LMV331M5 ACTIVE SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 85 C12 LMV331M5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 C12 LMV331M5X NRND SOT-23 DBV 5 3000 TBD Call TI Call TI -40 to 85 C12 LMV331M5X/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 C12 LMV331M7 NRND SC70 DCK 5 1000 TBD Call TI Call TI -40 to 85 C13 LMV331M7/NOPB ACTIVE SC70 DCK 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 C13 LMV331M7X NRND SC70 DCK 5 3000 TBD Call TI Call TI -40 to 85 C13 LMV331M7X/NOPB ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 C13 LMV339M NRND SOIC D 14 55 TBD Call TI Call TI -40 to 85 LMV339M LMV339M/NOPB ACTIVE SOIC D 14 55 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV339M LMV339MT NRND TSSOP PW 14 94 TBD Call TI Call TI -40 to 85 LMV339 MT LMV339MT/NOPB ACTIVE TSSOP PW 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV339 MT LMV339MTX NRND TSSOP PW 14 2500 TBD Call TI Call TI -40 to 85 LMV339 MT LMV339MTX/NOPB ACTIVE TSSOP PW 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV339 MT LMV339MX/NOPB ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV339M LMV393M NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 LMV 393M LMV393M/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV 393M LMV393MM NRND VSSOP DGK 8 1000 TBD Call TI Call TI -40 to 85 V393 LMV393MM/NOPB ACTIVE VSSOP DGK 8 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 V393 LMV393MMX NRND VSSOP DGK 8 3500 TBD Call TI Call TI -40 to 85 V393 Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 4-Aug-2015 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LMV393MMX/NOPB ACTIVE VSSOP DGK 8 3500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 V393 LMV393MX NRND SOIC D 8 2500 TBD Call TI Call TI -40 to 85 LMV 393M LMV393MX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LMV 393M (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 4-Aug-2015 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LMV331M5 SOT-23 DBV 5 1000 178.0 8.4 LMV331M5/NOPB SOT-23 DBV 5 1000 178.0 LMV331M5X SOT-23 DBV 5 3000 178.0 LMV331M5X/NOPB SOT-23 DBV 5 3000 LMV331M7 SC70 DCK 5 LMV331M7/NOPB SC70 DCK LMV331M7X SC70 DCK LMV331M7X/NOPB SC70 W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 DCK 5 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMV339MTX TSSOP PW 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LMV339MTX/NOPB TSSOP PW 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LMV339MX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 LMV393MM VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LMV393MM/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LMV393MMX VSSOP DGK 8 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LMV393MMX/NOPB VSSOP DGK 8 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LMV393MX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMV393MX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMV331M5 SOT-23 DBV 5 1000 210.0 185.0 35.0 LMV331M5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LMV331M5X SOT-23 DBV 5 3000 210.0 185.0 35.0 LMV331M5X/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LMV331M7 SC70 DCK 5 1000 210.0 185.0 35.0 LMV331M7/NOPB SC70 DCK 5 1000 210.0 185.0 35.0 LMV331M7X SC70 DCK 5 3000 210.0 185.0 35.0 LMV331M7X/NOPB SC70 DCK 5 3000 210.0 185.0 35.0 LMV339MTX TSSOP PW 14 2500 367.0 367.0 35.0 LMV339MTX/NOPB TSSOP PW 14 2500 367.0 367.0 35.0 LMV339MX/NOPB SOIC D 14 2500 367.0 367.0 35.0 LMV393MM VSSOP DGK 8 1000 210.0 185.0 35.0 LMV393MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LMV393MMX VSSOP DGK 8 3500 367.0 367.0 35.0 LMV393MMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.0 LMV393MX SOIC D 8 2500 367.0 367.0 35.0 LMV393MX/NOPB SOIC D 8 2500 367.0 367.0 35.0 Pack Materials-Page 2 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 JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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