LM336AP

LM236-LM336 2.5V voltage references Features ● ● ● ● ● Low temperature coefficient Wide operating current of 400µA to 10mA 0.2Ω dynamic impedance Guaranteed temperature stability Fast turn-on TO92 (Plastic package) Description The LM236 and LM336 are precision 2.5V regulator diodes. These voltage reference monolithic ICs operate like 2.5V Zener diodes with a low temperature coefficient and a dynamic impedance of 0.2Ω A third pin enables adjusting . the reference voltage and the temperature coefficient. SO8 (Plastic micropackage) Pin connections TO92 (Bottom view) ADJ v+ v- SO8 (Top view) V+ 8 NC 7 NC 6 ADJ 5 NC 1 2 NC NC 3 4 V+ 1- NC 2- NC 3- NC 4- V5- ADJ 6- NC 7- NC 8- V+ May 2007 Rev 3 1/15 www.st.com 15 Schematic diagram LM236-LM336 1 Schematic diagram Figure 1. Schematic diagram 2 Absolute maximum ratings Table 1. Symbol IR IF Toper Tstg Current Reverse Forward Operating free-air temperature range Storage temperature range -25 to +85 Absolute maximum ratings (AMR) Parameter LM236 LM336,B Unit 15 10 0 to +70 mA °C °C -65 to +150 2/15 LM236-LM336 Electrical characteristics 3 Table 2. Symbol Electrical characteristics Electrical characteristics LM236 Parameter Min. Reference breakdown voltage Tamb = +25°C, IR = 1mA LM236, LM336 LM336B Reverse breakdown voltage change with current 400µA ≤ IR ≤ 10mA Tamb = +25°C Tmin ≤ Tamb ≤ Tmax Reverse dynamic impedance (IR = 1mA) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax Temperature stability (VR = 2.49V, IR = 1mA) Long term stability (Tamb = +25°C ±0.1°C, IR= 1mA) Typ. Max. Min. Typ. Max. LM336,B Unit VR 2.44 2.49 2.54 2.39 2.44 2.49 2.49 2.59 2.54 V ΔVR 2.6 3 0.2 0.4 3.5 20 6 10 0.6 1 9 2.6 3 0.2 0.4 1.8 20 10 12 1 1.4 6 mV ZD KVT KVH Ω mV ppm Figure 2. Reverse voltage change (mV) Reverse voltage change Figure 3. Zener noise voltage Reverse current (mA) Noise (nV/√ Hz) Frequency (Hz) 3/15 Electrical characteristics LM236-LM336 Figure 4. Dynamic impedance (Ohm) Dynamic impedance Figure 5. Response time Voltage swing (V) Frequency (Hz) Figure 6. Reverse characteristics Figure 7. Time (µs) Forward characteristics Reverse current (mA) Reverse voltage (V) Figure 8. Temperature drift Forward voltage (V) Forward current (mA) Reverse voltage (V) Temperature (°C) 4/15 LM236-LM336 Application information 4 Application information The LM236, LM336 voltage references are easier to use than zener diodes. Their low impedance and wide current range facilitate biasing in any circuits. Besides, the breakdown voltage or the temperature coefficient can be adjusted so as to optimize the performance of the circuit. Figure 9 represents a LM336 with a 10kΩ potentiometer to adjust the reverse breakdown voltage which can be adjusted without altering the temperature coefficient of the circuit. The adjustment range is generally sufficient to adjust the initial tolerance of the circuit and the inaccuracy of the amplifier circuit. To obtain a lower temperature coefficient two diodes can be connected in series as indicated in Figure 10. When the circuit is adjusted to 2.49V the temperature coefficient is minimized. For a correct temperature coefficient, the diodes should be at the same ambient temperature as the LM336. The value of R1 is not critical (2-20kΩ). Figure 9. LM336 with pot for adjustment of breakdown voltage Figure 10. Temperature coefficient adjustment 5/15 Application information LM236-LM336 Typical applications Figure 11. 2.5V reference Figure 12. Wide input range reference Figure 13. Precision power regulator with low temperature coefficient 6/15 LM236-LM336 Figure 14. Adjustable shunt regulator Application information Figure 15. Linear ohmmeter 7/15 Application information Figure 16. Bipolar output reference LM236-LM336 Figure 17. 5V buffered reference 8/15 LM236-LM336 Figure 18. Low noise buffered reference Application information 9/15 Package information LM236-LM336 5 Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. 10/15 LM236-LM336 Package information 5.1 SO-8 package mechanical data Dimensions Ref. Min. A A1 A2 b c D H E1 e h L k ccc 0.25 0.40 1° 0.10 1.25 0.28 0.17 4.80 5.80 3.80 4.90 6.00 3.90 1.27 0.50 1.27 8° 0.10 0.010 0.016 1° 0.48 0.23 5.00 6.20 4.00 Millimeters Typ. Max. 1.75 0.25 0.004 0.049 0.011 0.007 0.189 0.228 0.150 0.193 0.236 0.154 0.050 0.020 0.050 8° 0.004 0.019 0.010 0.197 0.244 0.157 Min. Inches Typ. Max. 0.069 0.010 11/15 Package information LM236-LM336 5.2 TO-92 ammopack and tape & reel package mechanical data A1 P P T H d A H1 H0 H I1 W0 D0 F1 F2 P2 P0 W2 W1 W L1 Millimeters Dim. Min. AL A T d I1 P PO P2 F1/F2 Δh ΔP W W0 W1 W2 H H0 H1 DO L1 3.8 4.0 15.5 16 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.150 0.610 0.45 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 Typ. Max. 5.0 5.0 4.0 Min. Inches Typ. Max. 0.197 0.197 0.157 0.018 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.630 0.650 0.984 0.157 0.165 0.433 12/15 LM236-LM336 Package information 5.3 TO-92 bulk package mechanical data Millimeters Dim. Min. L B O1 C K O2 a 3.2 4.45 4.58 12.7 0.407 0.35 0.5 0.508 Typ. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.126 0.1752 0.1803 0.5 0.016 0.0138 Max. Min. Inches Typ. 0.05 0.1457 0.1969 0.198 0.1654 0.2047 0.2098 Max. 0.0197 0.02 13/15 Ordering information LM236-LM336 6 Ordering information Table 3. Order codes Temperature range -25°C to +85°C Package SO-8 Packing Tube or Tape & reel Bulk or Tape & reel or Ammopack Tube or Tape & reel Bulk or Tape & reel or Ammopack Tube or Tape & reel Bulk or Tape & reel or Ammopack Marking LM236 Part number LM236D/DT LM236Z/ZT/AP -25°C to +85°C TO-92 LM236 LM336D/DT -25°C to +85°C SO-8 LM336 LM336Z/ZT/AP -25°C to +85°C TO-92 LM336 LM336BD/BDT 0°C to 70°C SO-8 LM336B LM336BZ/BZT/BAP 0°C to 70°C TO-92 LM336B 7 Revision history Date 2-May-1997 24-May-2003 Revision 1 2 Initial release. Caption of pinout diagram for TO-92 package changed to indicate top view. Corrected caption of pinout diagram for TO-92 package on cover page (previous version is wrong, should be bottom view). Updated Section 5: Package information and Table 3: Order codes. Changes 29-May-2007 3 14/15 LM236-LM336 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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