LM336DT

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 SO8 (Plastic micropackage) 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. Pin connections TO92 (Bottom view) v+ ADJ v- SO8 (Top view) V+ 8 1 NC May 2007 Rev 3 NC 7 2 NC NC ADJ 3 4 6 NC 5 V+ 1- NC 2- NC 3- NC 4- V5- ADJ 6- NC 7- NC 8- V+ 1/15 www.st.com 15 Schematic diagram 1 Schematic diagram Figure 1. 2 LM236-LM336 Schematic diagram Absolute maximum ratings Table 1. Absolute maximum ratings (AMR) Symbol IR IF 2/15 Parameter LM236 LM336,B Current Reverse Forward Toper Operating free-air temperature range Tstg Storage temperature range mA 15 10 -25 to +85 Unit 0 to +70 -65 to +150 °C °C LM236-LM336 Electrical characteristics 3 Electrical characteristics Table 2. Electrical characteristics LM236 Symbol LM336,B Parameter Unit Min. Typ. Max. Min. Typ. Max. 2.44 2.49 2.54 2.39 2.44 2.49 2.49 2.59 2.54 V VR Reference breakdown voltage Tamb = +25°C, IR = 1mA LM236, LM336 LM336B ΔVR Reverse breakdown voltage change with current 400µA ≤ IR ≤ 10mA Tamb = +25°C Tmin ≤ Tamb ≤ Tmax 2.6 3 6 10 2.6 3 10 12 mV ZD Reverse dynamic impedance (IR = 1mA) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax 0.2 0.4 0.6 1 0.2 0.4 1 1.4 Ω KVT Temperature stability (VR = 2.49V, IR = 1mA) 3.5 9 1.8 6 mV KVH Long term stability (Tamb = +25°C ±0.1°C, IR= 1mA) 20 Reverse voltage change Figure 3. ppm Zener noise voltage Noise (nV/√Hz) Reverse voltage change (mV) Figure 2. 20 Reverse current (mA) Frequency (Hz) 3/15 Electrical characteristics Dynamic impedance Figure 5. Time (µs) Frequency (Hz) Reverse characteristics Reverse voltage (V) Temperature drift Reverse voltage (V) Figure 8. Temperature (°C) 4/15 Figure 7. Forward characteristics Forward voltage (V) Reverse current (mA) Figure 6. Response time Voltage swing (V) Dynamic impedance (Ohm) Figure 4. LM236-LM336 Forward current (mA) LM236-LM336 4 Application information 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 Application information Figure 14. Adjustable shunt regulator Figure 15. Linear ohmmeter 7/15 Application information Figure 16. Bipolar output reference Figure 17. 5V buffered reference 8/15 LM236-LM336 LM236-LM336 Application information Figure 18. Low noise buffered reference 9/15 Package information 5 LM236-LM336 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 5.1 Package information SO-8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 H 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max. 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k 1° 8° 1° 8° ccc 0.10 0.004 11/15 Package information 5.2 LM236-LM336 TO-92 ammopack and tape & reel package mechanical data A1 P T P A H W2 W0 W W1 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min. Typ. Min. Typ. Max. AL 5.0 0.197 A 5.0 0.197 T 4.0 0.157 d 0.45 0.018 I1 2.5 P 11.7 12.7 13.7 0.461 0.500 0.539 PO 12.4 12.7 13 0.488 0.500 0.512 P2 5.95 6.35 6.75 0.234 0.250 0.266 F1/F2 2.4 2.5 2.8 0.094 0.098 0.110 Δh -1 0 1 -0.039 0 0.039 ΔP -1 0 1 -0.039 0 0.039 W 17.5 18.0 19.0 0.689 0.709 0.748 W0 5.7 6 6.3 0.224 0.236 0.248 W1 8.5 9 9.75 0.335 0.354 0.384 0.098 W2 0.5 0.020 H 20 0.787 H0 15.5 16 H1 DO L1 12/15 Max. 16.5 0.610 0.630 25 3.8 4.0 4.2 11 0.650 0.984 0.150 0.157 0.165 0.433 LM236-LM336 5.3 Package information TO-92 bulk package mechanical data Millimeters Inches Dim. Min. L Typ. Max. Min. 1.27 Typ. Max. 0.05 B 3.2 3.7 4.2 0.126 0.1457 0.1654 O1 4.45 5.00 5.2 0.1752 0.1969 0.2047 C 4.58 5.03 5.33 0.1803 0.198 0.2098 K 12.7 O2 0.407 0.0197 0.02 a 0.35 0.5 0.5 0.508 0.016 0.0138 13/15 Ordering information 6 LM236-LM336 Ordering information Table 3. Order codes Temperature range Package Packing Marking LM236D/DT -25°C to +85°C SO-8 Tube or Tape & reel LM236 LM236Z/ZT/AP -25°C to +85°C TO-92 Bulk or Tape & reel or Ammopack LM236 LM336D/DT -25°C to +85°C SO-8 Tube or Tape & reel LM336 LM336Z/ZT/AP -25°C to +85°C TO-92 Bulk or Tape & reel or Ammopack LM336 LM336BD/BDT 0°C to 70°C SO-8 Tube or Tape & reel LM336B LM336BZ/BZT/BAP 0°C to 70°C TO-92 Bulk or Tape & reel or Ammopack LM336B Part number 7 14/15 Revision history Date Revision Changes 2-May-1997 1 Initial release. 24-May-2003 2 Caption of pinout diagram for TO-92 package changed to indicate top view. 29-May-2007 3 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. LM236-LM336 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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