LMV331TP-TR

LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators Description Features  Down to 1.8V Supply Voltage: 1.8V to 5.5V  Low Supply Current: 40 μA per Channel Typ  High-to-Low Propagation Delay: 120 ns Typ  Internal Hysteresis Ensures Clean Switching  Offset Voltage: ± 3.5 mV Maximum  Input Bias Current: 6 pA Typical  Input Common-Mode Range Extends 200 mV  No Phase Reversal for Overdriven Inputs  Open-Drain Output for Maximum Flexibility  Green, Space-Saving SC70 Package Available Applications  Peak and Zero-crossing Detectors  Threshold Detectors/Discriminators  Sensing at Ground or Supply Line  Logic Level Shifting or Translation  Window Comparators  IR Receivers  Clock and Data Signal Restoration  Telecom, Portable Communications  Portable and Battery Powered Systems LMV331TP LMV331TPU 5-Pin SOT23 (-T Suffix) +In 1 V- 2 -In 3 5 V+ 4 Out -In 1 V- 2 +In 3 3PEAK and the 3PEAK logo are registered trademarks of 3PEAK INCORPORATED. All other trademarks are the property of their respective owners. -In A 2 +In A 3 V- 4 www.3peakic.com.cn REV1.4 A B DEVICE V+ DESCRIPTION Fast 30ns, Low Power, Internal Hysteresis, TP1951/TP1951N ±3mV Maximum VOS, – 0.2V to VDD + 0.2V RRI, /TP1952/TP1954 Push-Pull (CMOS/TTL) Output Comparators Fast 30ns, Low Power, Internal Hysteresis, 4 8-Pin SOIC/MSOP/TSSOP/DIP (-S, -V, -T and -D Suffixes) 1 Related Products 5 LMV393TP Out A The chips incorporate 3PEAK’s proprietary and patented design techniques to achieve the ultimate combination of high-speed (120ns high-to-low propagation delay) and low power consuming (40μA quiescent current per comparator). These comparators are optimized for low power 1.8V, single-supply applications with greater than rail-to-rail input operation, and also operate with ±0.9V to ±2.75V dual supplies. The input commonmode voltage range extends 200mV below ground and 200mV above supply, allowing both ground and supply sensing. The internal input hysteresis eliminates output switching due to internal input noise voltage, reducing current draw. The LMV331 single comparator is available in tiny SC70 package for space-conservative designs. All chips are specified for the temperature range of –40°C to +85°C. Pin Configuration (Top View) 5-Pin SOT23/SC70 (-T and -C Suffixes) The 3PEAK INCORPORATED LMV331-393 are the most cost-effective solutions for applications where low-voltage operation, low power, space saving, and price are the primary specifications in circuit design for portable consumer products. The LMV331TP is the single-comparator, the LMV393TP is the dual, and both are open-drain output comparators for maximum flexibility. 8 V+ 7 Out B 6 -In B 5 +In B Out TP1955/TP1955N ±3mV Maximum VOS, – 0.2V to VDD + 0.2V RRI, /TP1956/TP1958 Open-Drain Output Comparators TP1931 /TP1932/TP1934 950ns, 3µA, 1.8V, ±2.5mV VOS-MAX, Internal Hysteresis, RRI, Push-Pull Output Comparators TP1935 /TP1936/TP1938 950ns, 3µA, 1.8V, ±2.5mV VOS-MAX, Internal Hysteresis, RRI, Open-Drain Comparators TP2011 /TP2012/TP2014 Ultra-low 200nA, 13µs, 1.6V, ±2mV VOS-MAX, Internal Hysteresis, RRI, Push-Pull (CMOS/TTL) Output Comparators TP2015 /TP2016/TP2018 Ultra-low 200nA, 13µs, 1.6V, ±2mV VOS-MAX, Internal Hysteresis, RRI, Open-Drain Output Comparators 1 LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators Order Information Model Name LMV331TP LMV331TPU LMV393TP Order Number Package Marking Information Transport Media, Quantity LMV331TP-TR 5-Pin SOT23 Tape and Reel, 3000 CA4YW (1) LMV331TP-CR 5-Pin SC70 Tape and Reel, 3000 CB4YW (1) LMV331TPU-TR 5-Pin SOT23 Tape and Reel, 3000 CI4YW LMV393TP-SR 8-Pin SOIC Tape and Reel, 4000 C46S LMV393TP-VR 8-Pin MSOP Tape and Reel, 3000 C46V LMV393TP-TR 8-Pin TSSOP Tape and Reel, 3000 C46T LMV393TP-DR 8-Pin DIP Tape and Reel, 3000 C46D (1) Note (1): ‘YW’ is date coding scheme. 'Y' stands for calendar year, and 'W' stands for single workweek coding scheme. Absolute Maximum Ratings Note 1 Supply Voltage: V+ – V–....................................6.0V Input Voltage............................. 0.3 Maximum Junction Temperature................... 150°C Storage Temperature Range.......... –65°C to 150°C Output Current: OUT.................................... ±45mA Lead Temperature (Soldering, 10 sec) ......... 260°C Output Short-Circuit Duration – 0.3 to Note 3…......... V+ + Operating Temperature Range.........–40°C to 85°C Note 2..........................±10mA Input Current: +IN, –IN, V– Indefinite Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 500mV beyond the power supply, the input current should be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage and how many amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the package. The specified values are for short traces connected to the leads. ESD, Electrostatic Discharge Protection Symbol Parameter Condition Minimum Level Unit HBM Human Body Model ESD ANSI/ESDA/JEDEC JS-001 2 kV CDM Charged Device Model ESD ANSI/ESDA/JEDEC JS-002 1 kV Thermal Information Package 2 RΘJA RΘJC(Top) Unit 8-Pin SOP 112.4 64.1 °C/W 8-Pin MSOP 127.3 50.8 °C/W 8-Pin TSSOP 152.5 51.1 °C/W REV1.4 www.3peakic.com.cn LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators Electrical Characteristics The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 27°C. VDD = +1.8V to +5.5V, VIN+ = VDD, VIN- = 1.2V, RPU=10kΩ, CL =15pF. SYMBOL PARAMETER VDD Supply Voltage VOS VOS TC VHYST VCM = 1.2V VCM = 1.2V VCM = 1.2V VHYST TC Input Offset Voltage Note 1 Input Offset Voltage Drift Note 1 Input Hysteresis Voltage Note 1 Input Hysteresis Voltage Drift Note 1 VCM = 1.2V 20 μV/°C IB IOS RIN Input Bias Current Input Offset Current Input Resistance VCM = 1.2V pA pA GΩ CIN Input Capacitance CMRR PSRR VOL ISC IQ tR Common Mode Rejection Ratio Common-mode Input Voltage Range Power Supply Rejection Ratio Low-Level Output Voltage Output Short-Circuit Current Quiescent Current per Comparator Rising Time 6 4 > 100 2 4 70 tF Falling Time tPD- Propagation Delay (High-to-Low) tPD+ Propagation Delay (Low-to-High) VCM CONDITIONS MIN ● 1.8 -3.5 3 Differential Common Mode VCM = VSS to VDD ● TYP MAX 5.5 ±0.6 0.5 6 V– - 0.1 +3.5 9 Input Overdrive=100mV, VIN- =2.5V RPU=5.1kΩ, Input Overdrive=100mV, VIN- =2.5V mV μV/°C mV dB V+ + 0.1 V– + 0.3 25 40 5 V pF 75 IOUT=1mA Sink or source current UNITS 70 V dB V mA μA ns 5 Ns 120 Ns 250 ns Note 1: The input offset voltage is the average of the input-referred trip points. The input hysteresis is the difference between the input-referred trip points. Note 2: Propagation Delay Skew is defined as: tPD-SKEW = tPD+ - tPD-. www.3peakic.com.cn REV1.4 3 LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators Pin Functions –IN: Inverting Input of the Comparator. Voltage range of this pin can go from V– – 0.3V to V+ + 0.3V. between power supply pins or between supply pins and ground. +IN: Non-Inverting Input of Comparator. This pin has the same voltage range as –IN. V– (VSS): Negative Power Supply. It is normally tied to ground. It can also be tied to a voltage other than ground as long as the voltage between V+ and V– is from 1.8V to 5.5V. If it is not connected to ground, bypass it with a capacitor of 0.1μF as close to the part as possible. NC: No Connection. V+ (VDD): Positive Power Supply. Typically the voltage is from 1.8V to 5.5V. Split supplies are possible as long as the voltage between V+ and V– is between 1.8V and 5.5V. A bypass capacitor of 0.1μF as close to the part as possible should be used OUT: Comparator Output. The voltage range extends to within millivolts of each supply rail. Operation The LMV331-393 single-supply comparators feature internal hysteresis, high speed, and low power. Input signal range extends beyond the negative and positive power supplies. The output can even extend all the way to the negative supply. The input stage is active over different ranges of common mode input voltage. Rail-to-rail input voltage range and low-voltage single-supply operation make these devices ideal for portable equipment. Applications Information Inputs The LMV331-393 comparators use CMOS transistors at the input which prevent phase inversion when the input pins exceed the supply voltages. Figure 1 shows an input voltage exceeding both supplies with no resulting phase inversion. 6 Vout Voltage (mV) Input Voltage 4 2 0 VDD =5V Output Voltage -2 Time (100μs/div) Figure 1. Comparator Response to Input Voltage The electrostatic discharge (ESD) protection input structure of two back-to-back diodes and 1kΩ series resistors are used to limit the differential input voltage applied to the precision input of the comparator by clamping input voltages that exceed supply voltages, as shown in Figure 2. Large differential voltages exceeding the supply voltage should be avoided to prevent damage to the input stage. 4 REV1.4 www.3peakic.com.cn LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators 1 kΩ +In 1 kΩ Core -In Chip Figure 2. Equivalent Input Structure Internal Hysteresis Most high-speed comparators oscillate in the linear region because of noise or undesired parasitic feedback. This tends to occur when the voltage on one input is at or equal to the voltage on the other input. To counter the parasitic effects and noise, the LMV331-393 implement internal hysteresis. The hysteresis in a comparator creates two trip points: one for the rising input voltage and one for the falling input voltage. The difference between the trip points is the hysteresis. When the comparator’s input voltages are equal, the hysteresis effectively causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs. Figure 3. illustrates the case where IN- is fixed and IN+ is varied. If the inputs were reversed, the figure would look the same, except the output would be inverted. Vi Vtr Hysteresis Band Vin- Vtf VDD Vhyst=Vtr-Vtf Vtr+Vtf -V inVos= 2 Time 0 Vi Vtr Vhyst=Vtr-Vtf Vtr+Vtf -V inVos= 2 Hysteresis Band Vin- Vtf Time VDD 0 Non-Inverting Comparator Output Inverting Comparator Output Figure 3. Comparator’s hysteresis and offset External Hysteresis Greater flexibility in selecting hysteresis is achieved by using external resistors. Hysteresis reduces output chattering when one input is slowly moving past the other. It also helps in systems where it is best not to cycle between high and low states too frequently (e.g., air conditioner thermostatic control). Output chatter also increases the dynamic supply current. Non-Inverting Comparator with Hysteresis A non-inverting comparator with hysteresis requires a two-resistor network, as shown in Figure 4 and a voltage reference (Vr) at the inverting input. Figure 4. Non-Inverting Configuration with Hysteresis www.3peakic.com.cn REV1.4 5 LMV331TP / LMV393TP General Purpose, 1.8V, RRI, Open-Drain Output Comparators When Vi is low, the output is also low. For the output to switch from low to high, Vi must rise up to Vtr. When Vi is high, the output is also high. In order for the comparator to switch back to a low state, Vi must equal Vtf before the non-inverting input V+ is again equal to Vr. R2 Vr  Vtr R1  R 2 Vr  (VDD  Vtf ) Vtr  Vtf  R1  R 2 R2 R1 R1  R 2  R PU Vr R1  R 2  R PU R 2  R PU Vhyst   Vtf R1 Vr  VDD R 2  R PU R1 R 2  R PU VDD if RPU