LM397 NSC | Alldatasheet
Document overview
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Technical content
Features
(TA = 25˚C. Typical values unless otherwise specified). n SOT23-5 package n Industrial operating range −40˚C to +85˚C n Single or dual power supplies n Wide supply voltage range 5V to 30V n Low supply current 300µA n Low input bias current 7nA n Low input offset current ±1nA n Low input offset voltage ±2mV n Response time 440ns (50mV overdrive) n Input common mode voltage 0 to VS - 1.5V
Applications
n Pulse, square wave generators n Peak detector n Industrial applications Connection Diagram SOT23-5 20022108 Top View Typical Circuit
Ordering Information
FIGURE 1. Inverting Comparator with Hysteresis
(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance Human Body Model 2KV (Note 2) Machine Model 200V (Note 3) VIN Differential 30V Supply Voltages 30V or ±15V Voltage at Input Pins −0.3V to 30V Storage Temperature Range −65˚C to +150˚C Junction Temperature (Note 4) +150˚C Soldering Information Infrared or Convection (20 sec.) 235˚C Wave Soldering (10 sec.) 260˚C Operating Ratings (Note 1) Supply Voltage, VS 5V to 30V Junction Temperature Range (Note 4) −40˚C to +85˚C Package Thermal Resistance (Note 4) SOT23-5 168˚C/W
Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, VS = 5V. Bold- face limits apply at temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Max (Note 6) Units VOS Input Offset Voltage VS = 5V to 30V, VO = 1.4V, VCM = 0V mV IOS Input Offset Current VO = 1.4V, VCM = 0V 1.6 250 nA IB Input Bias Current VO = 1.4V, VCM = 0V 250 400 nA IS Supply Current RL = Open, VS = 5V 0.25 0.7 mA RL = Open, VS = 30V 0.30 IO Output Sink Current VIN+ = 1V,VIN−= 0V, VO = 1.5V mA ILEAKAGE Output Leakage Current VIN+ = 1V,VIN−= 0V, VO = 5V 0.1 nA VIN+ = 1V,VIN−= 0V, VO = 30V µA VOL Output Voltage Low IO = −4mA, VIN+ = 0V,VIN−= 1V 180 400 700 mV VCM Common-Mode Input Voltage Range VS = 5V to 30V (Note 7) VS - 1.5V V VS - 2V LM397 www.national.com
Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, VS = 5V. Boldface limits apply at temperature extremes. (Continued) Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Max (Note 6) Units AV Voltage Gain VS = 15V, VO = 1.4V to 11.4V, RL > = 15kΩconnected to VS 120 V/mV tPHL Propagation Delay (High to Low) Input Overdrive = 5mV RL = 5.1kΩconnected to 5V, CL = 15pF 900 ns Input Overdrive = 50mV RL = 5.1kΩconnected to 5V, CL = 15pF 250 tPLH Propagation Delay (Low to High) Input Overdrive = 5mV RL = 5.1kΩconnected to 5V, CL = 15pF 940 µs Input Overdrive = 50mV RL = 5.1kΩconnected to 5V, CL = 15pF 440 ns Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended 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, 1.5kΩin series with 100pF. Note 3: Machine model, 0Ωin series with 200pF. 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) - TA)/ θJA . All numbers apply for packages soldered directly onto 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: The input common-mode voltage of either input should not be permitted to go below the negative rail by more than 0.3V. The upper end of the common-mode voltage range is VS - 1.5V at 25˚C. LM397 www.national.com
Typical Performance Characteristics TA = 25˚C. Unless otherwise specified. Supply Current vs. Supply Voltage Input Bias Current vs. Supply Current 20022103 20022101 Output Saturation Voltage vs. Output Sink Current Input Offset Voltage vs. Supply Voltage 20022104 20022102 Response Time for Various Input Overdrives – tPHL Response Time for Various Input Overdrives – tPLH 20022105 20022106 LM397 www.national.com
mode voltage range is from 0 to (VS – 1.5V). FIGURE 4. Output Saturation Voltage vs. Output Sink
SOT23-5 Tape and Reel Specification Tape Format Tape Section # Cavities Cavity Status Cover Tape Status Leader (Start End) 0 (min) Empty Sealed 75 (min) Empty Sealed Carrier 3000 Filled Sealed 1000 Filled Sealed Trailer (Hub End) 125 (min) Empty Sealed 0 (min) Empty Sealed TAPE DIMENSIONS 20022115 8mm 0.130 (3.3) 0.124 (3.15) 0.130 (3.3) 0.126 (3.2) 0.138 ± 0.002 (3.5 ± 0.05) 0.055 ± 0.004 (1.4 ± 0.11) 0.157 (4) 0.315 ± 0.012 (8 ± 0.3) Tape Size DIM A DIM Ao DIM B DIM Bo DIM F DIM Ko DIM P1 DIM W LM397 www.national.com
SOT23-5 Tape and Reel Specification (Continued) REEL DIMENSIONS 20022116 8mm 7.00 330.00 0.059 1.50 0.512 13.00 0.795 20.20 2.165 55.00 8.40 + 1.50/−0.00 0.567 14.40 W1 + 0.078/−0.039 W1 + 2.00/−1.00 Tape Size A B C D N LM397 www.national.com
inches (millimeters) unless otherwise noted 5-Pin SOT23 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 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com LM397 Single General Purpose Voltage Comparator 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.