LM136-5.0/LM236-5.0/LM336-5.0, 5.0V Reference Diode General Description The LM136-5.0/LM236-5.0/LM336-5.0 integrated circuits are precision 5.0V shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient 5.0V zener with 0.6X dynamic impedance. A third terminal on the LM136-5.0 allows the reference voltage and temperature coefficient to be trimmed easily. The LM136-5.0 series is useful as a precision 5.0V low voltage reference for digital voltmeters, power supplies or op amp circuitry. The 5.0V makes it convenient to obtain a stable reference from low voltage supplies. Further, since the LM136-5.0 operates as a shunt regulator, it can be used as either a positive or negative voltage reference. The LM136-5.0 is rated for operation over b55 C to a 125 C while the LM236-5.0 is rated over a b 25 C to a 85 C temperature range. The LM336-5.0 is rated for oper- ation over a 0 C to a 70 C temperature range. See the connection diagrams for available packages. For applications requiring 2.5V see LM136-2.5. Features Y Y Y Y Y Y Y Y Y Adjustable 4V to 6V Low temperature coefficient Wide operating current of 600 mA to 10 mA 0.6X dynamic impedance g 1% initial tolerance available Guaranteed temperature stability Easily trimmed for minimum temperature drift Fast turn-on Three lead transistor package Connection Diagrams TO-46 Metal Can Package TO-92 Plastic Package SO Package TL/H/5716-4 Bottom View TL/H/5716 - 5 Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0 See NS Package Number Z03A Bottom View TL/H/5716 - 7 Order Number LM136H-5.0, LM136H-5.0/883, LM236H-5.0, LM136AH-5.0, LM136AH-5.0/883, or LM236AH-5.0 See NS Package Number H03H Order Number LM336M-5.0 or LM336BM-5.0 See NS Package Number M08A 5.0V Reference with Minimum Temperature Coefficient Trimmed 4V to 6V Reference with Temperature Coefficient Independent of Breakdown Voltage Typical Applications 5.0V Reference TL/H/5716-1 Adjust to 5.00V TL/H/5716 - 3 *Any silicon signal diode *Does not affect temperature coefficient TL/H/5716 - 15 C1995 National Semiconductor Corporation TL/H/5716 RRD-B30M115/Printed in U. S. A. LM136-5.0/LM236-5.0/LM336-5.0, 5.0V Reference Diode December 1994 Absolute Maximum Ratings (Note 1) Soldering Information TO-92 Package (10 sec.) TO-46 Package (10 sec.) SO Package Vapor Phase (60 sec.) Infrared (15 sec.) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Reverse Current Forward Current Storage Temperature 15mA 10mA b 60 C to a 150 C 260 C 300 C 215 C 220 C See AN-450 ``Surface Mounting Methods and Their Effect on Product Reliability'' (appendix D) for other methods of soldering surface mount devices. Operating Temperature Range (Note 2) b 55 C to a 150 C LM136-5.0 b 25 C to a 85 C LM236-5.0 LM336-5.0 0 C to a 70 C Electrical Characteristics (Note 3) Parameter Reverse Breakdown Voltage LM136A-5.0/LM236A-5.0 LM136-5.0/LM236-5.0 Conditions TA e 25 C, IR e 1 mA LM136-5.0/LM236-5.0/LM336-5.0 LM136A-5.0/LM236A-5.0, LM336B-5.0 Units Min Typ Max Min Typ Max 4.9 4.95 5.00 5.00 5.1 5.05 4.8 4.90 5.00 5.00 5.2 5.1 V V 6 12 6 20 mV 0.6 2 X 4 12 mV mV mV 6 24 mV 2.5 X Reverse Breakdown Change With Current TA e 25 C, 600 mAsIRs10 mA Reverse Dynamic Impedance TA e 25 C, IR e 1 mA, f e 100 Hz 0.6 1.2 Temperature Stability (Note 4) VR Adjusted 5.00V IR e 1 mA, (Figure 2 ) 0 CsTAs70 C (LM336-5.0) b 25 C s TA s a 85 C (LM236-5.0) b 55 C s TA s a 125 C (LM136-5.0) 7 20 18 36 600 mAsIRs10 mA 6 17 Reverse Breakdown Change With Current LM336B-5.0 LM336-5.0 Adjustment Range Circuit of Figure 1 g1 Reverse Dynamic Impedance IR e 1 mA 0.8 Long Term Stability TA e 25 C g 0.1 C, IR e 1 mA, t e 1000 hrs 20 g1 1.6 0.8 20 V ppm Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device beyond its specified operating conditions. Note 2: For elevated temperature operation, Tj max is: LM136 150 C LM236 125 C LM336 100 C Thermal Resistance TO-92 TO-46 SO-8 ija (Junction to Ambient) 180 C/W (0.4x Leads) 170 C/W (0.125x Leads) 440 C/W 165 C/W ija (Junction to Case) N/A 80 C/W N/A Note 3: Unless otherwise specified, the LM136-5.0 is specified from b 55 C s TA s a 125 C, the LM236-5.0 from b 25 C s TA s a 85 C and the LM336-5.0 from 0 C s TA s a 70 C. Note 4: Temperature stability for the LM336 and LM236 family is guaranteed by design. Design limits are guaranteed (but not 100% percent production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Stability is defined as the maximum charge in VREF from 25 C to TA(min) or TA(max). 2 Typical Performance Characteristics Reverse Voltage Change Zener Noise Voltage Dynamic Impedance TL/H/5716 - 2 Response Time Reverse Characteristics Temperature Drift Forward Characteristics TL/H/5716 - 8 Application Hints If minimum temperature coefficient is desired, four diodes can be added in series with the adjustment potentiometer as shown in Figure 2 . When the device is adjusted to 5.00V the temperature coefficient is minimized. Almost any silicon signal diode can be used for this purpose such as a 1N914, 1N4148 or a 1N457. For proper temperature compensation the diodes should be in the same thermal environment as the LM136-5.0. It is usually sufficient to mount the diodes near the LM136-5.0 on the printed circuit board. The absolute resistance of the network is not critical and any value from 2k to 20k will work. Because of the wide adjustment range, fixed resistors should be connected in series with the pot to make pot setting less critical. The LM136-5.0 series voltage references are much easier to use than ordinary zener diodes. Their low impedance and wide operating current range simplify biasing in almost any circuit. Further, either the breakdown voltage or the temperature coefficient can be adjusted to optimize circuit performance. Figure 1 shows an LM136-5.0 with a 10k potentiometer for adjusting the reverse breakdown voltage. With the addition of R1 the breakdown voltage can be adjusted without affecting the temperature coefficient of the device. The adjustment range is usually sufficient to adjust for both the initial device tolerance and inaccuracies in buffer circuitry. 3 Application Hints (Continued) TL/H/5716 - 9 FIGURE 1. LM136-5.0 with Pot for Adjustment of Breakdown Voltage (Trim Range e g 1.0V Typical) TL/H/5716 - 10 FIGURE 2. Temperature Coefficient Adjustment (Trim Range e g 0.5V Typical) Typical Applications (Continued) Precision Power Regulator with Low Temperature Coefficient *Adjust for 6.25V across R1 4 TL/H/5716 - 11 Typical Applications (Continued) 5V Crowbar TL/H/5716 - 12 Adjustable Shunt Regulator TL/H/5716 - 13 Linear Ohmmeter TL/H/5716 - 14 5 Typical Applications (Continued) Op Amp with Output Clamped Bipolar Output Reference 5.0V Square Wave Calibrator 10V Buffered Reference Low Noise Buffered Reference Wide Input Range Reference TL/H/5716 - 6 6 TL/H/5716 - 16 Schematic Diagram 7 8 Physical Dimensions inches (millimeters) TO-46 Metal Can Package (H) Order Number LM136H-5.0, LM136H-5.0/883, LM236H-5.0, LM136AH-5.0, LM136AH-5.0/883 or LM236AH-5.0 NS Package Number H03H Small Outline (SO-8) Package Order Number LM336M-5.0 or LM336BM-5.0 NS Package Number M08A 9 LM136-5.0/LM236-5.0/LM336-5.0, 5.0V Reference Diode Physical Dimensions inches (millimeters) (Continued) Plastic Package (Z) Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0 NS Package Number Z03A 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. 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