LM1403/LM1403A Precision 2.50V Reference General Description Features The LM1403 is a precision, monolithic, temperature-compensated voltage reference. The LM1403 makes use of thin-film technology enhanced by the discrete laser trimming of resistors to achieve excellent Temperature coefficient (Tempco) of VOUT (as low as 11 ppm/§ C), along with tight initial tolerance, (as low as 0.02%). The trim scheme is such that individual resistors are cut open rather than being trimmed (partially cut), to avoid resistor drift caused by electromigration in the trimmed area. The LM1403 also provides excellent stability vs. changes in input voltage and output current. The output is current-limited and is short circuit proof. Y Y Y Y Y Y Y Y Y Low cost Low 400 mA operating current Low output impedance (0.15X) Excellent line regulation (0.0001%/V typical) Single-supply operation Low temperature coefficient Excellent initial accuracy (0.05% typical) Excellent for low-voltage operation (VS e 5V, VREF e 2.500V) For tighter specs, refer to LM368-2.5 Connection Diagram Dual-In-Line Package TL/H/9757 – 1 Top View Order Number LM1403N or LM1403AN See NS Package Number N08E Typical Applications Low Voltage Reference TL/H/9757 – 2 C1995 National Semiconductor Corporation TL/H/9757 RRD-B30M115/Printed in U. S. A. LM1403/LM1403A Precision 2.50V Reference June 1988 Absolute Maximum Ratings (Note 7) Storage Temperature Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Input Voltage Power Dissipation Output Short-Circuit Duration b 60§ C to a 150§ C Operating Temperature Range 0§ C to a 70§ C Lead Temperature (Soldering, 10 sec.) ESD rating to be determined. 40V 600 mW Continuous 260§ C Electrical Characteristics (Note 1) LM1403, LM1403A Parameter Conditions Typical VOUT Tested Limit (Note 2) Design Limit (Note 3) a 2.500 VOUT Error: LM1403 LM1403A Units (Max. Unless Noted) V g 0.4 % % Line Regulation 4.5V s VIN s 40V 0.2 3 mV Load Regulation (Note 8) 0 mA s ISOURCE s 10 mA 1.5 10 mV Thermal Regulation T e 20 ms (Note 4) g 0.005 g 0.02 %/100 mW Quiescent Current IL e 0 mA 0.350 1.50 Change of Quiescent Current vs. VIN 5.0V s VIN s 30V 3 Temperature Coefficient of VOUT (see graph): LM1403A (Note 5) LM1403 0§ C s TA s 70§ C 0§ C s TA s 70§ C g 11 Short Circuit Current VOUT e 0 Noise: g 0.05 g 1.0 g 0.04 g 25 g 15 30 0.1 Hz – 10 Hz 100 Hz –10 kHz mA mA/V g 40 70 100 12 420 ppm/§ C ppm/§ C mA mVp-p nV/0Hz Note 1: Unless otherwise noted, these specifications apply: TA e 25§ C, 4.9V s VIN s 15.5V, 0 s ILOAD s 0.5 mA, 0 s CL s 200 pF. Note 2: Tested Limits are guaranteed and 100% tested in production. Note 3: Design Limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage ranges. These limits are used to calculate outgoing quality levels. Note 4: Thermal Regulation is defined as the change in the output Voltage at a time T after a step change in power dissipation of 100 mW. Note 5: Temperature Coefficient of VOUT is defined as the worst case delta-VOUT measured at Specified Temperatures divided by the total span of the Specified Temperature Range (See graphs). There is no guarantee that the Specified Temperatures are exactly at the minimum or maximum deviation. Note 6: Thermal Resistance is 160§ C/W, junction to ambient, soldered into a PC board. Note 7: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its Rated Operating Conditions (see Note 1 and Conditions). Note 8: Load regulation is measured on the output pin at a point (/8× below the base of the package. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. 2 Typical Performance Characteristics (Note 1) Quiescent Current vs Input Voltage and Temperature Dropout Voltage vs Output Current Output Impedance vs Frequency Ripple Rejection vs Frequency Output Change vs Output Current (1) LM1403 as is. (2) With 10X in series with 10 mF, VOUT to GND. Output Noise vs. Frequency Temperature Coefficient TL/H/9757 – 3 Typical Temperature Coefficient Calculations: T.C. e 1.7 mV/(70§ c 2.5V) e 9.7 ppm/§ C 3 Typical Applications g 2.5V, g 1.25V References Improved Noise Performance TL/H/9757 – 4 TL/H/9757 – 5 Re Thin Film Resistor Network, g 0.05% Matching and 5 ppm Tracking (Beckman 694-3-R-10K-A), (Caddock T-914-10K-100-05) or similar. Multiple Output Voltages R e Thin Film Resistor Network 0.05% Matching and 5 ppm Tracking (Beckman 694-3-R-10K-A), (Caddock T-914-10K-100-05) or similar. TL/H/9757–6 TL/H/9757 – 7 Reference with Booster 100 mA Boosted Reference TL/H/9757 – 8 TL/H/9757 – 9 4 Typical Applications (Continued) Buffered High-Current Reference with Filter TL/H/9757 – 10 Simplified Schematic Diagram TL/H/9757 – 11 *Reg. U.S. Pat. Off. 5 LM1403/LM1403A Precision 2.50V Reference Physical Dimensions inches (millimeters) Lit. Ý106560 Plastic Dual-In-Line Package (N) Order Number LM1403N or LM1403AN NS Package Number N08E 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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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