LM185 NSC | Alldatasheet
Document overview
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Technical content
Features
n Adjustable from 1.24V to 5.30V n Operating current of 10µA to 20mA n 1% and 2% initial tolerance n 1Ω dynamic impedance n Low temperature coefficient Connection Diagrams TO-92 Plastic Package TO-46 Metal Can Package 00525009 Bottom View 00525001 Bottom View 00525010 Top View 00525015 Top View February 2005 LM185/LM285/LM385 Adjustable Micropower Voltage Reference © 2005 National Semiconductor Corporation DS005250 www.national.com
Ordering Information
Package Temperature Range NSC Drawing−55˚C to 125˚C −40˚C to 85˚C 0˚C to 70˚C TO-46 LM185BH H03HLM185BH/883 LM185BYH LM185BYH/883 TO-92 LM285BXZ LM385BXZ Z03ALM285BYZ LM385BYZ LM285Z LM385BZ LM385Z 8-Pin SOIC LM285M LM385M M08ALM285BYM LM385BM 20-Leadless Chip Carrier LM185BE/883 E20A Block Diagram 00525013 Typical Applications 1.2V Reference 5.0V Reference 00525014 00525002 LM185/LM285/LM385 www.national.com 2
Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 2) Reverse Current 30mA Forward Current 10mA Operating Temperature Range (Note 3) LM185 Series −55˚C to 125˚C LM285 Series −40˚C to 85˚C LM385 Series 0˚C to 70˚C Storage Temperature −55˚C to 150˚C Soldering Information Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C See An-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount devices. Electrical Characteristics(Note 4) Parameter Conditions LM185, LM285 LM385 Typ LM185BX, LM185BY Typ LM385BX, LM185B, LM285BX, LM285 LM385BY LM385 Units LM285BY (Limit) Tested Design Tested Design Tested Design Tested Design Limit Limit Limit Limit Limit Limit Limit Limit (Note (Note (Note (Note (Note (Note (Note (Note Reference Voltage 1.255 (max) 1.215 (min) Reference Voltage Change with Current 1mA < IR < 20mA 4 10 20 10 20 51 5 25 15 25 (max) Dynamic Output I R = 100µA, f = 100Hz Impedance I AC = 0.1 IR VOUT = VREF 0.3 0.4 Ω VOUT = 5.3V 0.7 1 Reference Voltage IR = 100µA mV Change with Output 13 6 3 6 25 10 5 10 (max) Voltage Feedback Current 13 20 25 20 25 16 30 35 30 35 nA (max) Minimum Operating VOUT =V REF 69 10 9 10 71 1 13 11 13 µA Current (see curve) VOUT = 5.3V 30 45 50 45 50 35 55 60 55 60 (max) Output Wideband IR = 100µA, 10Hz < f < 10kHz Noise V OUT =V REF 50 50 µV rms VOUT = 5.3V 170 170 LM185/LM285/LM385 www.national.com3
Electrical Characteristics(Note 4) (Continued) Parameter Conditions LM185, LM285 LM385 Typ LM185BX, LM185BY Typ LM385BX, LM185B, LM285BX, LM285 LM385BY LM385 Units LM285BY (Limit) Tested Design Tested Design Tested Design Tested Design Limit Limit Limit Limit Limit Limit Limit Limit (Note (Note (Note (Note (Note (Note (Note (Note Average Temperature IR = 100µA X Suffix 30 30 ppm/˚c Coefficient (Note 7) Y Suffix 50 50 (max) All Others 150 150 150 150 Long Term Stability IR = 100µA, T = 1000 Hr, 20 20 ppm TA = 25˚C ± 0.1˚C 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 do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the ElectricalCharacteristics. The guaranteed specifications apply only for the test conditions listed. Note 2: Refer to RETS185H for military specifications. Note 3: For elevated temperature operation, T Jmax is: LM185 150˚C LM285 125˚C LM385 100˚C Thermal Resistance TO-92 TO-46 SO-8 θJA (Junction to Ambient) 180˚C/W (0.4" leads) 440˚C/W 165˚C/W 170˚C/W (0.125" leads) θJC (Junction to Case) N/A 80˚C/W N/A Note 4: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T A =T J = 25˚C. Unless otherwise specified, all parameters apply for V REF < VOUT < 5.3V. Note 5: Guaranteed and 100% production tested. Note 6: Guaranteed, but not 100% production tested. These limits are not to be used to calculate average outgoing quality levels. Note 7: The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures from T MIN to TMAX, divided by TMAX −T MIN. The measured temperatures are −55, −40, 0, 25, 70, 85, 125˚C. LM185/LM285/LM385 www.national.com 4
Typical Performance Characteristics Temperature Drift of 3 Representative Units Feedback Current 00525016 00525017 Minimum Operating Current Reverse Characteristics 00525018 00525019 Reverse Characteristics Forward Characteristics 00525020 00525021 LM185/LM285/LM385 www.national.com5
Typical Performance Characteristics (Continued) Output Noise Voltage Dynamic Output Impedance 00525022 00525023 Response Time 00525024 Temperature Coefficient Typical LM185 LM285 LM385 00525004 LM185/LM285/LM385 www.national.com 6
Precision 10V Reference Low AC Noise Reference 00525025 00525026 25V Low Current Shunt Regulator 200 mA Shunt Regulator 00525027 00525028 LM185/LM285/LM385 www.national.com7
Typical Applications (Continued) Series-Shunt 20 mA Regulator High Efficiency Low Power Regulator 00525029 00525030 Voltage Level Detector Voltage Level Detector 00525031 00525032 Fast Positive Clamp 2.4V + ∆VD1 Bidirectional Clamp ±2.4V 00525033 00525034 LM185/LM285/LM385 www.national.com 8
Typical Applications (Continued) Bidirectional Adjustable Clamp ±1.8V to ±2.4V Bidirectional Adjustable Clamp ±2.4V to ±6V 00525035 00525036 Simple Floating Current Detector Current Source 00525037 00525038 LM185/LM285/LM385 www.national.com9
Typical Applications (Continued) Precision Floating Current Detector 00525039 Centigrade Thermometer, 10mV/˚C Freezer Alarm 00525011 00525012 LM185/LM285/LM385 www.national.com 10
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Physical Dimensions inches (millimeters) unless otherwise noted 20-Leadless Chip Carrier (E) TO-46 Metal Can Package (H) LM185/LM285/LM385 www.national.com 12
Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO-92 Plastic Package (Z) LM185/LM285/LM385 www.national.com13
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. For the most current product information visit us at www.national.com. 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. BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center 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 Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com LM185/LM285/LM385 Adjustable Micropower Voltage Reference