Maker : National Semiconductor
Part No. : LMC7221

Datasheet PDF : LMC7221.pdf
Cross Reference : LMC7221 Cross Reference
Buy Component : LMC7221 Find Stock and Price

Shortcut : LMC7221  LMC7225IM  LMC7225IM5  LMC7225IM5X  LMC7225IMX 

Product Information

LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output September 1999 LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output General Description The LM7221 is a micropower CMOS comparator available in the space saving SOT23-5 package. This makes this comparator ideal for space and weight critical designs. The LMC7221 is also available in the SO-8 package. The LMC7221 is supplied in two offset voltage grades, 5 mV and 15 mV. The open drain output can be pulled up with a resistor to a voltage which can be higher or lower than the supply voltage — this makes the part useful for mixed voltage systems. For a tiny comparator with a push-pull output, please see the LMC7211 datasheet. n n n n n n Guaranteed specs at 2.7V, 5V, 15V supplies Typical supply current 7 µA at 5V Response time of 4 µs at 5V LMC7221 — open drain output Input common-mode range beyond V− and V+ Low input current Applications n n n n n n n Mixed voltage battery powered products Notebooks and PDAs PCMCIA cards Mobile communications Alarm and security circuits Driving low current LEDs Direct sensor interface Features n Tiny SOT 23-5 package saves space n Package is less than 1.43 mm thick Connection Diagrams 8–Pin SO-8 5-Pin SOT23-5 DS012346-1 DS012346-2 Top View Top View Ordering Information Package Ordering Information LMC7221AIM 8-Pin SO-8 LMC7221AIMX LMC7221BIM LMC7221BIMX LMC7221AIM5 5-Pin SOT 23-5 LMC7221AIM5X LMC7221BIM5 LMC7221BIM5X NSC Drawing Number M08A M08A M08A M08A MA05A MA05A MA05A MA05A Package Marking LMC7221AIM LMC7221AIM LMC7221BIM LMC7221BIM C01A C01A C01B C01B Rails 2.5k Units Tape and Reel Rails 2.5k Units Tape and Reel 1k Units Tape and Reel 3k Units Tape and Reel 1k Units Tape and Reel 3k Units Tape and Reel Transport Media © 1999 National Semiconductor Corporation DS012346 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) Differential Input Voltage Voltage at Input Voltage at Output Pin Supply Voltage (V+–V−) Current at Input Pin (Note 7) Current at Output Pin (Notes 3, 8) Current at Power Supply Pin Lead Temperature 2 kV (VCC) +0.3V to (−VCC)−0.3V (VCC) + 0.3V to (−VCC)−0.3V 15V 16V (soldering, 10 sec.) Storage Temperature Range Junction Temperature (Note 4) 260˚C −65˚C to +150˚C 150˚C Operating Ratings (Note 1) Supply Voltage Junction Temperature Range LMC7221AI, LMC7221BI Thermal Resistance (θJA) SO-8 Package, 8-Pin Surface Mount M05A Package, 5-Pin Surface Mount 2.7 ≤ VCC ≤ 15V −40˚C ≤ TJ ≤ +85˚C ± 5 mA ± 30 mA 40 mA 180˚C/W 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. Boldface limits apply at the temperature extremes Typ Symbol VOS TCVOS Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Offset Voltage Average Drift IB IOS CMRR PSRR AV CMVR Input Current Input Offset Current Common Mode Rejection Ratio Power Supply Rejection Ratio Voltage Gain Input Common-Mode Voltage Range CMRR > 55 dB VOL IS Output Voltage Low Supply Current Iload = 2.5 mA VOUT = low −0.3 0.2 7 CMRR > 55 dB 100 3.0 2.9 2.7 −0.2 0.0 0.3 0.4 12 14 2.9 2.7 −0.2 0.0 0.3 0.4 12 14 dB V min V max V max µA max 2.7V ≤ V+ ≤ 15V 80 dB 0V ≤ VCM ≤ 2.7V 0.04 0.02 75 pA pA dB (Note 10) 3.3 µV/Month Conditions (Note 5) 3 1.0 LMC7221AI Limit (Note 6) 5 8 LMC7221BI Limit (Note 6) 15 18 mV max µV/˚C Units www.national.com 2 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. Boldface limits apply at the temperature extremes Typ Symbol VOS TCVOS Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Offset Voltage Average Drift IB IOS ...

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