Datasheet LMC7221 (Texas Instruments)

LMC7221 www.ti.com
SNOS748E – SEPTEMBER 1999 – REVISED MARCH 2013
LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output Check for Samples: LMC7221 FEATURES DESCRIPTION 1
The LM7221 is a micropower CMOS comparator
• Tiny 5-Pin SOT-23 package saves space 2
available in the space saving 5-Pin SOT-23 package.
• Package is less than 1.43 mm thick
This makes this comparator ideal for space and
• Ensured specs at 2.7V, 5V, 15V supplies
weight critical designs. The LMC7221 is also available in the 8-Pin SOIC package. The LMC7221
• Typical supply current 7 μA at 5V
is supplied in two offset voltage grades, 5 mV and 15
• Response time of 4 μs at 5V
mV.
• LMC7221—open drain output
The open drain output can be pulled up with a
• Input common-mode range beyond V− and V+
resistor to a voltage which can be higher or lower
• Low input current
than the supply voltage—this makes the part useful for mixed voltage systems.
APPLICATIONS
For a tiny comparator with a push-pull output, please
• Mixed voltage battery powered products
see the LMC7211 datasheet.
• Notebooks and PDAs • PCMCIA cards • Mobile communications • Alarm and security circuits • Driving low current LEDs • Direct sensor interface Connection Diagram 8-Pin SOIC - Top View 5-Pin SOT-23 - Top View Figure 1. See Package Number D0008A Figure 2. See Package Number DBV0005A
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. 2 PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Document Outline FEATURES Applications DESCRIPTION Connection Diagram Absolute Maximum Ratings Operating Ratings 2.7V Electrical Characteristics 5.0V and 15.0V Electrical Characteristics Leakage Characteristics AC Electrical Characteristics Typical Performance Characteristics Application Information BENEFITS OF THE LMC7221 TINY COMPARATOR Size Height Simplified Board Layout Low Supply Current Wide Voltage Range Digital Outputs Representing Signal Level Open Drain Output Driving LEDs (Light Emitting Diodes) Input range to Beyond Rail to Rail Zero Crossing Detector Low Input Currents and High Input Impedance Direct Sensor Interfacing LOW VOLTAGE OPERATION OPEN DRAIN OUTPUT Output Stage OUTPUT SHORT CIRCUIT CURRENT INPUT PROTECTION LAYOUT CONSIDERATIONS PUSH-PULL OUTPUTS, DUAL VERSIONS ADDITIONAL 5-Pin SOT-23 TINY DEVICES SPICE MACROMODEL Revision History