LMC7211BIM5X

LMC7211 NSC | Alldatasheet

Document overview

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Technical content

Features

n Tiny SOT 23-5 package saves space n Package is less than 1.43 mm thick n Guaranteed specs at 2.7V, 5V, 15V supplies n Typical supply current 7 µA at 5V n Response time of 4 µs at 5V n LMC7211 — push-pull output n Input common-mode range beyond V− and V+ n Low input current

Applications

n Battery Powered Products n Notebooks and PDAs n PCMCIA cards n Mobile Communications n Alarm and Security circuits n Direct Sensor Interface n Replaces amplifiers used as comparators with better performance and lower current Connection Diagrams Package Ordering NSC Drawing Package Transport Media Information Number Marking 8-Pin SO-8 LMC7211AIM M08A LM7211AIM Rails LMC7211AIMX M08A LM7211AIM 2.5k Units Tape and Reel LMC7211BIM M08A LM7211BIM Rails LMC7211BIMX M08A LM7211BIM 2.5k Units tape and Reel 5-Pin SOT 23-5 LMC7211AIM5 MA05A C00A 1k Units Tape and Reel LMC7211AIM5X MA05A C00A 3k Units Tape and Reel LMC7211BIM5 MA05A C00B 1k Units Tape and Reel LMC7211BIM5X MA05A C00B 3k Units Tape and Reel 8-Pin SO-8 DS012337-1 Top View 5-Pin SOT23-5 DS012337-2 Top View September 1999 LMC7211 Tiny CMOS Comparator with Rail-to-Rail Input and Push-Pull Output © 1999 National Semiconductor Corporation DS012337 www.national.com

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) 2 kV Differential Input Voltage (V CC ) +0.3V to (−VCC )−0.3V Voltage at Input/Output Pin (VCC ) + 0.3V to (−VCC )−0.3V Supply Voltage (V+–V −) 16V Current at Input Pin (Note 7) ±5m A Current at Output Pin (Notes 3, 8) ±30 mA Current at Power Supply Pin 40 mA Lead Temperature (soldering, 10 sec) 260˚C Storage Temperature Range −65˚C to +150˚C Junction Temperature (Note 4) 150˚C Operating Ratings(Note 1) Supply Voltage 2.7 ≤ VCC ≤ 15V Junction Temperature Range LMC7211AI, LMC7211BI −40˚C ≤ TJ ≤ +85˚C Thermal Resistance (θJA) 8-Pin Surface Mount 180˚C/W 5-Pin Surface Mount 325˚C/W 2.7V Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2.Boldfacelimits apply at the temperature extremes. Typ LMC7211AI LMC7211BI Symbol Parameter Conditions (Note 5) Limit Limit Units (Note 6) (Note 6) VOS Input Offset Voltage 3 5 15 mV 81 8 max TCV OS Input Offset Voltage 1.0 µV/˚C Temperature Drift Input Offset Voltage (Note 10) 3.3 µV/Month Average Drift I B Input Current 0.04 pA IOS Input Offset Current 0.02 pA CMRR Common Mode 0V ≤ VCM ≤ 2.7V 75 dB Rejection Ratio PSRR Power Supply 2.7V ≤ V+ ≤ 15V 80 dB Rejection Ratio AV Voltage Gain 100 dB CMVR Input Common-Mode CMRR > 55 dB 3.0 2.9 2.9 V Voltage Range 2.7 2.7 min CMRR > 55 dB −0.3 −0.2 −0.2 V 0.0 0.0 max VOH Output Voltage High I load = 2.5 mA 2.5 2.4 2.4 V 2.3 2.3 min VOL Output Voltage Low I load = 2.5 mA 0.2 0.3 0.3 V 0.4 0.4 max IS Supply Current V OUT = Low 7 12 12 µA 14 14 max 5.0V and 15.0V Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5.0V and 15V, V− = 0V, VCM = VO = V+/2.Boldfacelim- its apply at the temperature extremes. Typ LMC7211AI LMC7211BI Symbol Parameter Conditions (Note 5) Limit Limit Units (Note 6) (Note 6) VOS Input Offset Voltage 3 5 15 mV 81 8 max www.national.com 2

5.0V and 15.0V Electrical Characteristics(Continued) Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5.0V and 15V, V− = 0V, VCM = VO = V+/2.Boldfacelim- its apply at the temperature extremes. Typ LMC7211AI LMC7211BI Symbol Parameter Conditions (Note 5) Limit Limit Units (Note 6) (Note 6) TCV OS Input Offset Voltage V + = 5V 1.0 µV/˚C Temperature Drift V + = 15V 4.0 Input Offset Voltage V + = 5V 3.3 µV/Month Average Drift V + = 15V 4.0 IB Input Current 0.04 pA IOS Input Offset Current 0.02 pA CMRR Common Mode V+ = 5.0V 75 dB Rejection Ration V+ = 15.0V 82 dB PSRR Power Supply 5V ≤ V+ ≤ 10V 80 dB Rejection Ratio AV Voltage Gain 100 dB CMVR Input Common-Mode V+ = 5.0V 5.3 5.2 5.2 V Voltage Range CMRR > 55 dB 5.0 5.0 min CMRR > 55 dB 0.0 0.0 max V+ = 15.0V 15.3 15.2 15.2 V CMRR > 55 dB 15.0 15.0 min CMRR > 55 dB 0.0 0.0 max VOH Output Voltage High V+ = 5V 4.8 4.6 4.6 mV Iload = 5m A 4.45 4.45 min V+ = 15V 14.8 14.6 14.6 mV Iload = 5m A 14.45 14.45 min VOL Output Voltage Low V+ = 5V 0.2 0.40 0.40 mV Iload = 5m A 0.55 0.55 max V+ = 15V 0.2 0.40 0.40 mV Iload = 5m A 0.55 0.55 max IS Supply Current V OUT = Low 7 14 14 µA 18 18 max ISC Short Circuit Current Sourcing 30 mA Sinking (Note 8) 45 mA Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2.Boldfacelimits apply at the temperature extreme. Typ LMC7211AI LMC7211BI Symbol Parameter Conditions (Note 5) Limit Limit Units (Note 6) (Note 6) trise Rise Time f = 10 kHz, Cl= 50 pF, 0.3 µs Overdrive= 10 mV (Note 9) tfall Fall Time f = 10 kHz, Cl= 50 pF, 0.3 µs Overdrive= 10 mV (Note 9) www.national.com3

Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2.Boldfacelimits apply at the temperature extreme. Typ LMC7211AI LMC7211BI Symbol Parameter Conditions (Note 5) Limit Limit Units (Note 6) (Note 6) tPHL Propagation Delay f = 10 kHz, 10 mV 10 µs (High to Low) Cl = 50 pF 100 mV 4 (Note 11) (Note 9) V+ = 2.7V, 10 mV 10 µs f= 10 kHz, 100 mV 4 Cl = 50 pF (Note 9) tPLH Propagation Delay f = 10 kHz, 10 mV 6 µs (Low to High) Cl = 50p 100 mV 4 (Note 11) (Note 9) V+ = 2.7V, 10 mV 7 µs f= 10 kHz, 100 mV 4 Cl = 50 pF (Note 9) Note 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in- tended 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, 1.5 kΩ in series with 100 pF. 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 150˚C. Output currents in excess of±30 mA over long term may adversely affect reliability. Note 4:The maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max)−T A)/θJA.All numbers apply for packages soldered directly into a PC board. Note 5:Typical values represent the most likely parametric norm. Note 6:All limits are guaranteed by testing or statistical analysis. Note 7:Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage rating. Note 8:Do not short circuit output to V+, when V+ is greater than 12V or reliability will be adversely affected. Note 9:C L includes the probe and jig capacitance. Note 10:Input offset voltage average drift is calculated by dividing the accelerated operating life VOS drift by the equivalent operational time. This represents worst case input conditions and includes the first 30 days of drift. Note 11:Input step voltage for propagation delay measurement is 2V. Typical Performance CharacteristicsSingle Supply TA = 25˚C unless specified Supply Current vs Supply Voltage DS012337-15 Supply Current vs Temperature while Sourcing DS012337-16 Supply Current vs Temperature while Sinking DS012337-17 www.national.com 4

Typical Performance CharacteristicsSingle Supply TA = 25˚C unless specified (Continued) Output Sourcing Current vs Supply Voltage DS012337-18 Output Sinking Current vs Supply Voltage DS012337-19 Output Sourcing Current vs Output Voltage @ 5V DS012337-20 Output Sinking Current vs Output Voltage @ 5V DS012337-21 Output Sourcing Current vs Output Voltage @ 15V DS012337-22 Output Sinking Current vs Output Voltage @ 15V DS012337-23 Response Time for Various Input Overdrives −t PLH DS012337-24 Response Time for Various Input Overdrives −t PHL DS012337-25 www.national.com5

Typical Performance CharacteristicsSingle Supply TA = 25˚C unless specified (Continued) Response Time for Various Input Overdrives −tPLH DS012337-26 Response Time for Various Input Overdrives −t PHL DS012337-27 Response Time for Various Input Overdrives −t PLH DS012337-28 Response Time for Various Input Overdrives −t PHL DS012337-29 Input Bias Current vs Common Mode Voltage DS012337-30 Input Bias Current vs Common Mode Voltage DS012337-31 Input Bias Current vs Common Mode Voltage DS012337-32 Input Bias Current vs Temperature DS012337-33 www.national.com 6

Application Information

1.0 Benefits of the LMC7211 Tiny Comparator

Size.The small footprint of the SOT 23-5 packaged Tiny Comparator, (0.120 x 0.118 inches, 3.05 x 3.00 mm) saves space on printed circuit boards, and enable the design of smaller electronic products. Because they are easier to carry, many customers prefer smaller and lighter products. Height.The height (0.056 inches, 1.43 mm) of the Tiny Comparator makes it possible to use it in PCMCIA type III cards. Simplified Board Layout.The Tiny Comparator can sim- plify board layout in several ways. First, by placing a com- parator where comparators are needed, instead of routing signals to a dual or quad device, long pc traces may be avoided. By using multiple Tiny Comparators instead of duals or quads, complex signal routing and possibly crosstalk can be reduced. Low Supply Current.The typical 7 µA supply current of the LMC7211 extends battery life in portable applications, and may allow the reduction of the size of batteries in some ap- plications. Wide Voltage Range. The LMC7211 is characterized at 15V, 5V and 2.7V. Performance data is provided at these popular voltages. This wide voltage range makes the LMC7211 a good choice for devices where the voltage may vary over the life of the batteries. Digital Outputs Representing Signal Level.Comparators provide a high or low digital output depending on the voltage levels of the (+) and (−) inputs. This makes comparators use- ful for interfacing analog signals to microprocessors and other digital circuits. The LMC7211 can be thought of as a one-bit a/d converter. Push-Pull Output.The push-pull output of the LMC7211 is capable of both sourcing and sinking milliamp level currents even at a 2.7 volt supply. This can allow the LMC7211 to drive multiple logic gates. Driving LEDs (Light Emitting Diodes).With a 5 volt power supply, the LMC7211’s output sinking current can drive small, high efficiency LEDs for indicator and test point cir- cuits. The small size of the Tiny package makes it easy to find space to add this feature to even compact designs. Input range to Beyond Rail to Rail.The input common mode range of the LMC7211 is slightly larger than the actual power supply range. This wide input range means that the comparator can be used to sense signals close to the power supply rails. This wide input range can make design easier by eliminating voltage dividers, amplifiers, and other front end circuits previously used to match signals to the limited input range of earlier comparators. This is useful to power supply monitoring circuits which need to sense their own power supply, and compare it to a reference voltage which is close to the power supply voltage. The wide input range can also be useful for sensing the voltage drop across a current sense resistor for battery chargers. Zero Crossing Detector.Since the LMC7211’s common mode input range extends below ground even when pow- ered by a single positive supply, it can be used with large in- put resistors as a zero crossing detector. Low Input Currents and High Input Impedance.These characteristics allow the LMC7211 to be used to sense high impedance signals from sensors. They also make it possible to use the LMC7211 in timing circuits built with large value resistors. This can reduce the power dissipation of timing cir- cuits. For very long timing circuits, using high value resistors can reduce the size and cost of large value capacitors for the same R-C time constant. Direct Sensor Interfacing.The wide input voltage range and high impedance of the LMC7211 may make it possible to directly interface to a sensor without the use of amplifiers or bias circuits. In circuits with sensors which can produce outputs in the tens to hundreds of millivolts, the LMC7211 can compare the sensor signal with an appropriately small reference voltage. This may be done close to ground or the positive supply rail. Direct sensor interfacing may eliminate the need for an amplifier for the sensor signal. Eliminating the amplifier can save cost, space, and design time.

2.0 Low Voltage Operation

Comparators are the common devices by which analog sig- nals interface with digital circuits. The LMC7211 has been designed to operate at supply voltages of 2.7V without sac- rificing performance to meet the demands of 3V digital sys- tems. At supply voltages of 2.7V, the common-mode voltage range extends 200 mV (guaranteed) below the negative supply. This feature, in addition to the comparator being able to sense signals near the positive rail, is extremely useful in low voltage applications. At V + = 2.7V propagation delays are tPLH = 4 µs and tPHL = 4 µs with overdrives of 100 mV. Please refer to the performance curves for more extensive characterization.

3.0 Shoot-Through Current

The shoot-through current is defined as the current surge, above the quiescent supply current, between the positive and negative supplies of a device. The current surge occurs when the output of the device switches states. The shoot-through current results in glitches in the supply volt- ages. Usually, glitches in the supply lines are prevented by bypass capacitors. When the glitches are minimal, the value of the bypass capacitors can be reduced. DS012337-5 FIGURE 1. Even at Low-Supply Voltage of 2.7V, an

should be limited to 100 mV or less. pacitor to 0.01 µF to reduce the voltage delta to 10 mV. to make the capacitor larger. sive bypass capacitors in non-critical circuits.

4.0 Output Short Circuit Current

diodes to the supply rails, and varistors may be used.

5.0 Hysteresis

teresis to the switching can reduce or eliminate this problem. noise immunity for the circuit. Figure 4,Figure 5and Figure 6. voltage and shift the voltage thresholds. FIGURE 2. Circuit for Measurement of the FIGURE 3. Measurement of the Shoot-Through Current

6.0 Input Protection

Figure 7. Note that diode leakage

7.0 Layout Considerations

trically noisy environments.

8.0 Open Drain Output, Dual Versions

LMC7221 datasheet for details. drain outputs, please see the LMC6772 datasheet. FIGURE 4. Positive Feedback for Hysteresis

Application Information(Continued)

9.0 Additional SOT23-5 Tiny Devices

National Semiconductor has additional parts available in the space saving SOT23 Tiny package, including amplifiers, voltage references, and voltage regulators. These devices include — LMC7101 1 MHz gain-bandwidth rail-to-rail input and out- put amplifier — high input impedance and high gain 700 µA typical current 2.7V, 3V, 5V and 15V specifications. LMC7111 Low power 50 kHz gain-bandwidth rail-to-rail in- put and output amplifier with 25 µA typical cur- rent specified at 2.7V, 3.0V, 3.3V, 5V and 10V. LM7131 Tiny Video amp with 70 MHz gain bandwidth 3V, 5V and ±5V specifications. LP2980 Micropower SOT 50 mA Ultra Low-Dropout Regulator. LM4040 Precision micropower shunt voltage reference. Fixed voltages of 2.500V, 4.096V, 5.000V, 8.192V and 10.000V. LM4041 Precision micropower shut voltage reference 1.225V and adjustable. LM385 Low current voltage reference. Fixed Voltages of 1.2V and 2.5V. Contact your National Semiconductor representative for the latest information.

10.0 Spice Macromodel

A Spice Macromodel is available for the LMC7211 compara- tor on the National Semiconductor Amplifier Macromodel disk. Contact your National Semiconductor representative to obtain the latest version. Tape Size A B C D N W1 W2 W3 SOT-23-5 Tape and Reel Specification TAPE FORMAT Tape Section # Cavities Cavity Status Cover Tape Status Leader 0 (min) Empty Sealed (Start End) 75 (min) Empty Sealed REEL DIMENSIONS DS012337-13 www.national.com 10

SOT-23-5 Tape and Reel Specification(Continued) TAPE FORMAT (Continued) Tape Section # Cavities Cavity Status Cover Tape Status Carrier 3000 Filled Sealed

1000 Filled Sealed

Trailer 125 (min) Empty Sealed (Hub End) 0 (min) Empty Sealed TAPE DIMENSIONS Tape Size DIM A DIM Ao DIM B DIM Bo DIM F DIM Ko DIM DIM W DS012337-14 www.national.com11

Physical Dimensionsinches (millimeters) unless otherwise noted 5-Pin SOT Package Order Number LMC7211AIM5, LMC7211AIM5X, LMC7211BIM5 or LMC7211BIM5X 8-Pin Small Outline Package Order Number LMC7211AIM, LMC7211AIMX, LMC7211BIM or LMC7211BIMX www.national.com 12

Physical Dimensionsinches (millimeters) unless otherwise noted (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems 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. 2. A critical component is any component of 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 Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com LMC7211 Tiny CMOS Comparator with Rail-to-Rail Input and Push-Pull Output National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.