LP311 LP311 Voltage Comparator Literature Number: SNOSBJ7A LP311 Voltage Comparator General Description Features The LP311 is a low power version of the industry-standard LM311. It takes advantage of stable high-value ion-implanted resistors to perform the same function as an LM311, with a 30:1 reduction in power drain, but only a 6:1 slowdown of response time. Thus the LP311 is well suited for batterypowered applications, and all other applications where fast response is not needed. It operates over a wide range of supply voltages from 36V down to a single 3V supply, with less than 200 mA drain, but it is still capable of driving a 25 mA load. The LP311 is quite easy to apply without any oscillation, if ordinary precautions are taken to minimize stray coupling from the output to either input or to the balance pins (as described in the LM311 datasheet Application Hints). Y Y Y Y Y Y Y Y Y Y e Applications Level-detector for battery-powered instruments Low-power lamp or relay driver Low-power zero-crossing detector O bs ol et Y Schematic Diagram Low power drain, 900 mW on 5V supply Operates from g 15V or a single supply as low as 3V Output can drive 25 mA Emitter output can swing below negative supply Response time: 1.2 ms Same pin-out as LM311 Low input currents: 2 nA of offset, 15 nA of bias Large common-mode input range: b14.6V to 13.6V with g 15V supply TL/H/5711 – 7 Connection Diagram Dual-In-Line Package Order Number LP311M or LP311N See NS Package Numbers M08A or N08E TL/H/5711 – 4 Top View C1995 National Semiconductor Corporation TL/H/5711 RRD-B30M115/Printed in U. S. A. LP311 Voltage Comparator February 1995 Absolute Maximum Ratings Power Dissipation (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Total Supply Voltage (V8 – 4) 10 sec Operating Temperature Range 36V Collector Output to Negative Supply Voltage (V7 – 4) Collector Output to Emitter Output Emitter Output to Negative Supply Voltage (V1 – 4) Differential Input Voltage Input Voltage (Note 1) 500 mW Output Short Circuit Duration 0§ C to 70§ C b 65§ C to 150§ C Storage Temperature Range Lead Temperature (Soldering, 10 seconds) 260§ C 40V 40V g 30V g 30V g 15V Electrical Characteristics These specifications apply for VS e g 15V and 0§ C s TA s 70§ C, unless otherwise specified. Typ Max Units Input Offset Voltage (Notes 3, 4) TA e 25§ C, RSs100k 2.0 7.5 mV Input Offset Current (Notes 3, 4) TA e 25§ C 2.0 25 Input Bias Current (Note 3) TA e 25§ C Voltage Gain TA e 25§ C, RL e 5k Response Time (Note 5) TA e 25§ C Saturation Voltage (Note 6) VINs b10 mV, IOUT e 25 mA TA e 25§ C Strobe Current (Note 7) TA e 25§ C Output Leakage Current VINt10 mV, VOUT e 35V TA e 25§ C RSs100k 15 40 100 nA nA 200 V/mV 1.2 ms 100 0.4 1.5 V 200 300 mA 0.2 100 nA 10 mV 35 nA 150 nA bs ol Input Offset Voltage (Notes 3, 4) Min e Conditions et Parameter Input Offset Current (Notes 3, 4) Input Bias Current (Note 3) Input Voltage Range Vb a 0.5 a 13.7, b 14.7 V a b1.5 V 0.4 V Saturation Voltage (Note 6) V a t4.5V, Vb e 0V VINs b10 mV, ISINKs1.6 mA 0.1 Positive Supply Current TA e 25§ C, Output on 150 300 mA Negative Supply Current TA e 25§ C 80 180 mA Minimum Operating Voltage TA e 25§ C 3.0 3.5 V Note 1: This rating applies for g 15V supplies. The positive input voltage limit is 30V above the negative supply. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply, whichever is less. Note 2: The maximum junction temperature of the LP311 is 85§ C. For operating at elevated temperatures, devices in the dual-in-line package must be derated based on a thermal resistance of 160§ C/W, junction to ambient. O Note 3: The offset voltage, offset current and bias current specifications apply for any supply voltage from a single 4V supply up to g 15V supplies. Note 4: The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with 1 mA load. Thus, these parameters define an error band and take into account the worst-case effects of voltage gain and input impedance. Note 5: The response time specified is for a 100 mV input step with 5 mV overdrive. Note 6: Saturation voltage specification applies to collector-emitter voltage (V7-1) for VCOLLECTOR s (V a b 3V). Note 7: This specification gives the range of current which must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin to ground. It should be current driven, 100 mA to 300 mA. 2 Typical Performance Characteristics Input Bias Current Input Offset Current Common Mode Limits Transfer Function Output Saturation Voltage (Collector Output) Response Time for Various Input Overdrives Response Time for Various Input Overdrives Output Saturation Voltage (Emitter Output) Response Time for Various Input Overdrives Response Time for Various Input Overdrives Output Limiting Characteristics O bs ol et e Input Characteristics TL/H/5711 – 5 3 Typical Performance Characteristics Supply Current (Continued) Supply Current Leakage Currents TL/H/5711 – 6 Applications Information For applications information and typical applications, refer to the LM311 datasheet. e Auxiliary Circuits Offset Balancing et Strobing TL/H/5711 – 2 bs ol TL/H/5711– 1 Note: Do not ground strobe pin. Test Circuits Test Circuit 1 (Collector Output) Test Circuit 2 (Emitter Output) TL/H/5711 – 8 Test Circuit 4 (Emitter Output) O Test Circuit 3 (Collector Output) TL/H/5711 – 9 TL/H/5711 – 10 TL/H/5711 – 11 4 et e Physical Dimensions inches (millimeters) O bs ol Order Number LP311M NS Package Number M08A 5 et e LP311 Voltage Comparator Physical Dimensions inches (millimeters) (Continued) bs ol Molded Dual-In-Line Package (N) Order Number LP311N NS Package Number N08E LIFE SUPPORT POLICY O 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 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. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 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 Europe Fax: (a49) 0-180-530 85 86 Email: cnjwge @ tevm2.nsc.com Deutsch Tel: (a49) 0-180-530 85 85 English Tel: (a49) 0-180-532 78 32 Fran3ais Tel: (a49) 0-180-532 93 58 Italiano Tel: (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductor Japan Ltd. Tel: 81-043-299-2309 Fax: 81-043-299-2408 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. 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. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP® Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page www.ti.com/video e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2011, Texas Instruments Incorporated