LMV339M

LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack Comparators May 2007 LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack Comparators General Description The LMV393 and LMV339 are low voltage (2.7-5V) versions of the dual and quad comparators, LM393/339, which are specified at 5-30V. The LMV331 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. The LMV393 is available in 8-pin SOIC and MSOP. The LMV339 is available in 14-pin SOIC and TSSOP. The LMV331/393/339 is the most cost-effective 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 National's advanced Submicron Silicon-Gate BiCMOS process. The LMV331/393/339 have bipolar input and output stages for improved noise performance. Features (For 5V supply, typical unless otherwise noted) ■ Guaranteed 2.7V and 5V performance −40°C to +85°C ■ Industrial temperature range 60 µA/Channel ■ Low supply current ■ Input common mode voltage range includes ground 200 mV ■ Low output saturation voltage 200 ns ■ Propagation delay ■ Space saving 5-pin SC70 and 5-Pin SOT23 packages Applications ■ ■ ■ ■ ■ Mobile communications Notebooks and PDA's Battery powered electronics General purpose portable device General purpose low voltage applications Typical Applications Squarewave Oscillator 10008017 Positive Peak Detector 10008008 10008024 © 2007 National Semiconductor Corporation 100080 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model LMV331/393/339 Machine Model LMV331/339/393 Differential Input Voltage Voltage on any pin (referred to V− pin) Soldering Information Infrared or Convection (20 sec) Storage Temp. Range Junction Temperature (Note 3) Operating Ratings Supply Voltage Temperature Range (Note 3) LMV393. LMV339, LMV331 Thermal Resistance (θJA) 5-Pin SC70 5-Pin SOT23 8-Pin SOIC 8-Pin MSOP 14-Pin SOIC 14-Pin TSSOP (Note 1) 2.7V to 5.0V −40°C to +85°C 478°C/W 265°C/W 190°C/W 235°C/W 145°C/W 155°C/W 800V 120V ±Supply Voltage 5.5V 235°C −65°C to +150°C 150°C 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 2.7V, V− = 0V. Boldface limits apply at the temperature extremes. Symbol VOS TCVOS IB IOS VCM VSAT IO IS Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Input Voltage Range Saturation Voltage Output Sink Current Supply Current ISINK ≤ 1 mA VO ≤ 1.5V LMV331 LMV393 Both Comparators LMV339 All four Comparators Output Leakage Current 5 Conditions Min (Note 5) Typ (Note 4) 1.7 5 10 5 −0.1 2.0 120 23 40 70 140 .003 100 140 200 1 250 400 50 150 Max (Note 5) 7 Units mV µV/°C nA nA V V mV mA µA µA µA µA 2.7V AC Electrical Characteristics TJ = 25°C, V+ = 2.7V, RL = 5.1 kΩ, V− = 0V. Symbol tPHL tPLH Parameter Propagation Delay (High to Low) Propagation Delay (Low to High) Conditions Input Overdrive = 10 mV Input Overdrive = 100 mV Input Overdrive = 10 mV Input Overdrive = 100 mV Min (Note 5) Typ (Note 4) 1000 350 500 400 Max (Note 5) Units ns ns ns ns www.national.com 2 LMV331 Single / LMV393 Dual / LMV339 Quad 5V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V− = 0V. Boldface limits apply at the temperature extremes. Symbol VOS TCVOS IB IOS VCM AV Vsat IO IS Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Input Voltage Range Voltage Gain Saturation Voltage Output Sink Current Supply Current ISINK ≤ 4 mA VO ≤ 1.5V LMV331 LMV393 Both Comparators LMV339 All four Comparators Output Leakage Current 20 Conditions Min (Note 5) Typ (Note 4) 1.7 5 25 2 −0.1 4.2 50 200 84 60 100 170 .003 400 700 10 120 150 200 250 300 350 1 250 400 50 150 max (Note 5) 7 9 Units mV µV/°C nA nA V V V/mV mV mA µA µA µA µA 5V AC Electrical Characteristics TJ = 25°C, V+ = 5V, RL = 5.1 kΩ, V− = 0V. Symbol tPHL tPLH Parameter Propagation Delay (High to Low) Propagation Delay (Low to High) Conditions Input Overdrive = 10 mV Input Overdrive = 100 mV Input Overdrive = 10 mV Input Overdrive = 100 mV Min (Note 5) Typ (Note 4) 600 200 450 300 Max (Note 5) Units ns ns ns ns 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: The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered directly onto a PC board. Note 4: 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 5: All limits are guaranteed by testing or statistical analysis. 3 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad Typical Performance Characteristics Supply Current vs. Supply Voltage Output High (LMV331) Unless otherwise specified, VS = +5V, single supply, TA = 25°C Supply Current vs. Supply Voltage Output Low (LMV331) 10008034 10008033 Output Voltage vs. Output Current at 5V Supply Output Voltage vs. Output Current at 2.7 Supply 10008037 10008038 Input Bias Current vs. Supply Voltage Response Time vs. Input Overdrives Negative Transition 10008036 10008042 www.national.com 4 LMV331 Single / LMV393 Dual / LMV339 Quad Response Time for Input Overdrive Positive Transition Response Time vs. Input Overdrives Negative Transition 10008043 10008041 Response Time for Input Overdrive Positive Transition 10008040 5 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad Simplified Schematic 10008047 www.national.com 6 LMV331 Single / LMV393 Dual / LMV339 Quad Application Circuits BASIC COMPARATOR A basic comparator circuit is used for converting analog signals to a digital output. The LMV331/393/339 have an opencollector output stage, which requires a pull-up resistor to a positive supply voltage for the output to switch properly. When the internal output transistor is off, the output voltage will be pulled up to the external positive voltage. 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 LMV331/393/339 the pullup resistor should range between 1k to 10kΩ. The comparator compares the input voltage (VIN) at the noninverting 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. 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 comparator's switching threshold. This problem can be prevented by the addition of hysteresis or positive feedback. 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 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 The total hysteresis provided by the network is defined as 10008026 ΔVa = Va1 - Va2 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 RPULL-UP. 10008004 FIGURE 1. Basic Comparator 7 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad 10008025 FIGURE 2. Inverting Comparator with Hysteresis 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 When Vin is high, the output is also high, to make the comparator switch back to it's low state, Vin must equal Vref before VA will again equal Vref. Vin can be calculated by: 10008022 FIGURE 3. The hysteresis of this circuit is the difference between Vin1 and Vin2. ΔVin = VCCR1/R2 www.national.com 8 LMV331 Single / LMV393 Dual / LMV339 Quad 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: 10008023 FIGURE 4. SQUAREWAVE OSCILLATOR 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. If: R1 = R2 = R3 Then: Va1 = 2VCC/3 When the output switches to ground, the value of Va is reduced by the hysteresis network to a value given by: Va2 = VCC/3 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 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 or calculating the exponential gives: 1/freq = 2(0.694) R4 C1 Resistors R3 and R4 must be at least two times larger than R5 to insure 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. FREE RUNNING MULTIVIBRATOR 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 free running multivibrator, 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 10008008 10008024 FIGURE 5. Squarewave Oscillator 9 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad 10008007 Solving these equations for t1 and t2 t1 =R4C1ln2 t2 =R5C1ln2 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: FIGURE 6. Crystal controlled Oscillator 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: 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. 10008009 FIGURE 7. Pulse Generator www.national.com 10 LMV331 Single / LMV393 Dual / LMV339 Quad 10008006 FIGURE 11. Driving TTL AND GATES The comparator can be used as three input AND gate. The operation of the gate is as follow: 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 5V. 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. 10008017 FIGURE 8. Positive Peak Detector 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 1 MΩ resistor 10008018 FIGURE 9. Negative Peak Detector DRIVING CMOS AND TTL The comparator's output is capable of driving CMOS and TTL Logic circuits. 10008011 FIGURE 12. AND Gate 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. 10008005 FIGURE 10. Driving CMOS 11 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad 10008010 FIGURE 13. OR Gate ORing THE OUTPUT By the inherit nature of an open collector comparator, the outputs of several comparators can be tied together with a pull up resistor to VCC. If one or more of the comparators outputs goes low, the output VO will go low. 10008013 FIGURE 15. Large Fan-In AND Gate 10008012 FIGURE 14. ORing the Outputs www.national.com 12 LMV331 Single / LMV393 Dual / LMV339 Quad Connection Diagrams 5-Pin SC70/SOT23 8-Pin SOIC/MSOP 14-Pin SOIC/TSSOP 10008001 Top View 10008002 Top View 10008003 Top View Ordering Information Package Temperature Range Industrial −40°C to +85°C 5-Pin SC70 5-Pin SOT23 8-Pin SOIC 8-Pin MSOP 14-Pin SOIC 14-Pin TSSOP LMV331M7 LMV331M7X LMV331M5 LMV331M5X LMV393M LMV393MX LMV393MM LMV393MMX LMV339M LMV339MX LMV339MT LMV339MTX Packaging Marking C13 C13 C12 C12 LMV393M LMV393M V393 V393 LMV339M LMV339M LMV339MT LMV339MT Transport Media NSC Drawing 1k Units Tape and Reel 3k Units Tape and Reel 1k Units Tape and Reel 3k Units Tape and Reel Rails 2.5k 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 MAA05A MF05A M08A MUA08A M14A MTC14 13 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad SC70-5 Tape and Reel Specification 10008044 SOT-23-5 Tape and Reel Specification TAPE FORMAT Tape Section Leader (Start End) Carrier Trailer (Hub End) # Cavities 0 (min) 75 (min) 3000 250 125 (min) 0 (min) Cavity Status Empty Empty Filled Filled Empty Empty Cover Tape Status Sealed Sealed Sealed Sealed Sealed Sealed www.national.com 14 LMV331 Single / LMV393 Dual / LMV339 Quad TAPE DIMENSIONS 10008045 8 mm Tape Size 0.130 (3.3) DIM A 0.124 (3.15) DIM Ao 0.130 (3.3) DIM B 0.126 (3.2) DIM Bo 0.138 ±0.002 (3.5 ±0.05) DIM F 0.055 ±0.004 (1.4 ±0.11) DIM Ko 0.157 (4) DIM P1 0.315 ±0.012 (8 ±0.3) DIM W 15 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad REEL DIMENSIONS 10008046 8 mm Tape Size 7.00 0.059 0.512 0.795 2.165 330.00 1.50 13.00 20.20 55.00 A B C D N 0.331 + 0.059/−0.000 8.40 + 1.50/−0.00 W1 0.567 14.40 W2 W1+ 0.078/−0.039 W1 + 2.00/−1.00 W3 www.national.com 16 LMV331 Single / LMV393 Dual / LMV339 Quad Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SC70 NS Package Number MAA05A 5-Pin SOT23 NS Package Number MF05A 17 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad 8-Pin SOIC NS Package Number M08A 8-Pin MSOP NS Package Number MUA08A www.national.com 18 LMV331 Single / LMV393 Dual / LMV339 Quad 14-Pin SOIC NS Package Number M14A 14-Pin TSSOP NS Package Number MTC14 19 www.national.com LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack Comparators Notes THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS, IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT NATIONAL’S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS. EXCEPT AS PROVIDED IN NATIONAL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. Copyright© 2007 National Semiconductor Corporation For the most current product information visit us at www.national.com National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530-85-86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +49 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com