LMV761/LMV762/LMV762Q Low Voltage, Precision Comparator with Push-Pull Output General Description Features The LMV761/LMV762/LMV762Q are precision comparators intended for applications requiring low noise and low input offset voltage. The LMV761 single has a shutdown pin that can be used to disable the device and reduce the supply current. The LMV761 is available in a space saving 6-Pin SOT-23 or 8-Pin SOIC package. The LMV762 dual is available in 8Pin SOIC or MSOP package and LMV762Q in MSOP and SOIC package. They feature a CMOS input and Push-Pull output stage. The Push-Pull output stage eliminates the need for an external pull-up resistor. The LMV761/LMV762/LMV762Q are designed to meet the demands of small size, low power and high performance required by portable and battery operated electronics. The input offset voltage has a typical value of 200V at room temp and a 1mV limit over temp. (VS = 5V, TA = 25C, typical values unless specified). 0.2mV Input offset voltage 1mV Input offset voltage (max over temp) 0.2pA Input bias current 120 nsec Propagation delay (OD = 50mV) 300A Low supply current 100dB CMRR 110dB PSRR -40C to 125C Extended Temperature Range Push-pull output Ideal for 2.7V and 5V single supply applications Available in space-saving packages: 6-Pin SOT-23 (single w/shutdown) 8-Pin SOIC (single w/shutdown) 8-Pin SOIC/MSOP (dual without shutdown) LMV762Q is an Automotive grade product that is AECQ100 grade 1 qualified and is manufactured on an automotive grade flow Applications Portable and battery-powered systems Scanners Set top boxes High speed differential line receiver Window comparators Zero-crossing detectors High speed sampling circuits Automotive VOS vs. VCC Typical Circuit 20037032 Threshold Detector 20037010 (c) 2012 Texas Instruments Incorporated 200370 SNOS998G www.ti.com LMV761/LMV762/LMV762Q Low Voltage, Precision Comparator with Push-Pull Output June 27, 2012 LMV761/LMV762/LMV762Q Soldering Information Infrared or Convection (20 sec.) Wave Soldering (10 sec.) Junction Temperature Storage Temperature Range 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) Human Body Model Machine Model Supply Voltage (V+ - V-) Differential Input Voltage Voltage between any two pins Output Short Circuit Duration (Note 9) Current at Input Pin 2000V 200V 5.5V Supply Voltage Supply Voltage 235C 260C (Lead Temp) 150C -65C to 150C Operating Ratings Supply Voltage (V+ - V-) Temperature Range Package Thermal Resistance (Note 4) 6-Pin SOT-23 8-Pin SOIC 8-Pin MSOP 5 mA 2.7V to 5.25V -40C to +125C 265C/W 190C/W 235C/W 2.7V Electrical Characteristics Unless otherwise specified, all limited guaranteed for TJ = 25C, VCM = V+/2, V+ = 2.7V, V- = 0V-. Boldface limits apply at the temperature extremes. (Note 5) Symbol Parameter Condition Min (Note 7) Typ (Note 6) Max (Note 7) Units 0.2 1.0 mV VOS Input Offset Voltage IB Input Bias Current (Note 8) 0.2 50 pA IOS Input Offset Current (Note 8) .001 5 pA CMRR Common Mode Rejection Ratio 0V < VCM < VCC - 1.3V V+ = 2.7V to 5V 80 100 80 110 PSRR Power Supply Rejection Ratio CMVR Input Common Mode Voltage Range CMRR > 50dB Output Swing High IL = 2mA, VID = 200mV Output Swing Low IL = -2mA, VID = -200mV Output Short Circuit Current (Note 3) Sourcing, VO = 1.35V, VID = 200mV 6.0 20 Sinking, VO = 1.35V, VID = -200mV 6.0 15 VO ISC dB dB -0.3 1.5 Supply Current LMV761 (Single Comparator) V+ - 0.35 V+ - 0.1 90 V 250 700 LMV762/LMV762Q (Both Comparators) 550 1400 Output Leakage I @ Shutdown SD = GND, VO = 2.7V 0.20 IS LEAKAGE Supply Leakage I @ Shutdown SD = GND, VCC = 2.7V 0.20 Propagation Delay RL = 5.1k CL = 50pF Overdrive = 5mV 270 tPD Overdrive = 10mV 205 Overdrive = 50mV 120 IOUT mV mA 275 IS V A A A LEAKAGE 2 A ns tSKEW Propagation Delay Skew 5 ns tr Output Rise Time 10% to 90% 1.7 ns tf Output Fall Time 90% to 10% 1.8 ns ton Turn On Time From Shutdown 6 s www.ti.com 2 Unless otherwise specified, all limited guaranteed for TJ = 25C, VCM = V+/2, V+ = 5.0V, V- = 0V-. Boldface limits apply at the temperature extremes. Symbol Parameter Condition Min (Note 7) Typ (Note 6) Max (Note 7) Units VOS Input Offset Voltage 0.2 1.0 mV IB Input Bias Current (Note 8) 0.2 50 pA IOS Input Offset Current (Note 8) 0.01 5 pA CMRR Common Mode Rejection Ratio 0V < VCM < VCC - 1.3V V+ = 2.7V to 5V 80 100 80 110 PSRR Power Supply Rejection Ratio CMVR Input Common Mode Voltage Range CMRR > 50dB Output Swing High IL = 4mA, VID = 200mV Output Swing Low IL = -4mA, VID = -200mV Output Short Circuit Current (Note 3) Sourcing, VO = 2.5V, VID = 200mV 6.0 60 Sinking, VO = 2.5V, VID = -200mV 6.0 40 VO ISC dB dB -0.3 3.8 V+ - 0.35 V+ - 0.1 120 Supply Current LMV761 (Single Comparator) V V 250 mV mA A 225 700 LMV762/LMV762Q (Both Comparators) 450 1400 Output Leakage I @ Shutdown SD = GND, VO = 5.0V 0.20 IS LEAKAGE Supply Leakage I @ Shutdown SD = GND, VCC = 5.0V 0.20 Overdrive = 5mV 225 tPD Propagation Delay RL = 5.1k CL = 50pF Overdrive = 10mV 190 Overdrive = 50mV 120 tSKEW Propagation Delay Skew 5 ns tr Output Rise Time 10% to 90% 1.7 ns tf Output Fall Time 90% to 10% 1.5 ns ton Turn On Time from Shutdown 4 s IS IOUT A A LEAKAGE 2 A 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 condition, see the Electrical Characteristics. Note 2: Unless otherwise specified human body model is 1.5k in series with 100pF. Machine model 200pF. Note 3: 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 Application section for information on temperature de-rating of this device. Absolute Maximum Rating indicate junction temperature limits beyond which the device may be permanently degraded, either mechanically or electrically. 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 into a PC board. Note 5: Maximum temperature guarantee range is -40C to 125C. Note 6: Typical values represent the most likely parametric norm. Note 7: All limits are guaranteed by testing or statistical analysis. Note 8: Guaranteed by design. Note 9: 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 current in excess of 25 mA over long term may adversely affect reliability. 3 www.ti.com LMV761/LMV762/LMV762Q 5.0V Electrical Characteristics LMV761/LMV762/LMV762Q Connection Diagrams LMV761 (Single) 6-Pin SOT-23 LMV761 (Single) 8-Pin SOIC 20037001 Top View LMV762/LMV762Q (Dual) 8-Pin SOIC and MSOP 20037003 20037002 Top View Top View Ordering Information Package 6-Pin SOT-23 Part Number LMV761MF LMV761MFX LMV761MA 8-Pin SOIC LMV761MAX LMV762MA LMV762MAX 8-Pin SOIC 8-Pin MSOP 8-Pin MSOP www.ti.com LMV762QMA LMV762QMAX LMV762MM LMV762MMX LMV762QMM LMV762QMMX Package Marking Transport Media 1k units Tape and Reel C22A 3k units Tape and Reel LMV761MA LMV762MA LMV762QMA 95 Units/Rail 95 Units/Rail 2.5k Units Tape and Reel 1k Units Tape and Reel 3.5k Units Tape and Reel 4 M08A 2.5k Units Tape and Reel 3.5k Units Tape and Reel C32A MF06A 95 Units/Rail 2.5k Units Tape and Reel 1k Units Tape and Reel C23A NSC Drawing M08A MUA08A MUA08A LMV761/LMV762/LMV762Q Typical Performance Characteristics PSI vs. VCC (VO = High) PSI vs. VCC (VO = Low) 20037004 20037005 VOS vs. VCC Input Bias vs. Common Mode @ 25C 20037024 20037010 Input Bias vs. Common Mode @ 25C Output Voltage vs. Supply Voltage 20037025 20037011 5 www.ti.com LMV761/LMV762/LMV762Q Output Voltage vs. Supply Voltage Output Voltage vs. Supply Voltage 20037012 20037013 Output Voltage vs. Supply Voltage ISOURCE vs. VOUT 20037014 20037006 ISINK vs. VOUT ISOURCE vs. VOUT 20037008 20037007 www.ti.com 6 LMV761/LMV762/LMV762Q ISINK vs. VOUT Prop Delay vs. Overdrive 20037019 20037009 Response Time vs. Input Overdrives Positive Transition Response Time vs. Input Overdrives Positive Transition 20037020 20037021 Response Time vs. Input Overdrives Negative Transition Response Time vs. Input Overdrives Negative Transition 20037022 20037023 7 www.ti.com LMV761/LMV762/LMV762Q Application Information BASIC COMPARATOR A basic comparator circuit is used to convert analog input signals to digital output signals. The comparator compares an input voltage (VIN) at the non-inverting input to the reference voltage (VREF) at the inverting pin. If VIN is less than VREF the output (VO) is low (VOL). However, if VIN is greater than VREF, the output voltage (VO) is high (VOH). 20037026 20037028 20037027 FIGURE 2. Non-Inverting Comparator Configuration INPUT The LMV761/LMV762 have near zero input bias current. This allows very high resistance circuits to be used without any concern for matching input resistances. This also allows the use of very small capacitors in R-C type timing circuits. This reduces the cost of the capacitors and amount of board space used. 20037031 FIGURE 1. Basic Comparator HYSTERESIS The basic comparator configuration may oscillate or produce a noisy output if the applied differential input is near the comparator's input offset voltage. This tends to occur when the voltage on one input is equal or very close to the other input voltage. Adding hysteresis can prevent this problem. Hysteresis creates two switching thresholds (one for the rising input voltage and the other for the falling input voltage). Hysteresis is the voltage difference between the two switching thresholds. When both inputs are nearly equal, hysteresis causes one input to effectively move quickly past the other. Thus, moving the input out of the region in which oscillation may occur. Hysteresis can easily be added to a comparator in a non-inverting configuration with two resistors and positive feedback Figure 2. The output will switch from low to high when VIN rises up to VIN1, where VIN1 is calculated by SHUTDOWN MODE The LMV761 features a low-power shutdown pin that is activated by driving SD low. In shutdown mode, the output is in a high impedance state, supply current is reduced to 20nA and the comparator is disabled. Driving SD high will turn the comparator on. The SD pin should not be left unconnected due to the fact that it is a high impedance input. When left unconnected, the output will be at an unknown voltage. Also do not three-state the SD pin. The maximum input voltage for SD is 5.5V, referred to ground and is not limited by VCC. This allows the use of 5V logic to drive SD while VCC operates at a lower voltage, such as 3V. The logic threshold limits for SD are proportional to VCC. BOARD LAYOUT AND BYPASSING The LMV761/LMV762 is designed to be stable and oscillation free, but it is still important to include the proper bypass capacitors and ground pickups. Ceramic 0.1F capacitors should be placed at both supplies to provide clean switching. Minimize the length of signal traces to reduce stray capacitance. VIN1 = [VREF(R1+R2)] / R2 The output will switch from high to low when VIN falls to VIN2, where VIN2 is calculated by VIN2 = [VREF(R1+R2) - (VCC R1)] / R2 The Hysteresis is the difference between VIN1 and VIN2. VIN = VIN1 - VIN2 = [VREF(R1+R2) / R2] - [VREF(R1+R2)] - [(VCC R1) / R2] = VCC R1 / R2 www.ti.com 8 LMV761/LMV762/LMV762Q Physical Dimensions inches (millimeters) unless otherwise noted 6-Pin SOT-23 NS Package Number MF06A 8-Pin SOIC NS Package Number M08A 9 www.ti.com LMV761/LMV762/LMV762Q 8-Pin MSOP NS Package Number MUA08A www.ti.com 10 www.ti.com 11 LMV761/LMV762/LMV762Q Notes LMV761/LMV762/LMV762Q Low Voltage, Precision Comparator with Push-Pull Output 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. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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